Answers
Answer: Using the diagram the labelled parts are identified and matches with the number given below:
1.) Golgi bodies
2.) Cell membrane
3.) Lysosomes
4.) Nucleus
5.) Mitochondria
6.) Vacuole
7.) Endoplasmic reticulum
8.) Ribosome
Explanation:
All living organisms (plants and animals) are made up of cells which are the structural and functional unit. This is because it is the basic organizational unit of life. These cells are made up of structures known as the CELL ORGANELLES. The present or absence of one or more of these organelles creates the difference seen in plant and animal cells. They are briefly describe below:
--> Golgi bodies: they are stack membrane-lined sacs which export materials like enzymes and hormones made from the cell.
--> Cell membrane: this is a flexible membrane made up of protein and lipids that prevents the cell contents from escaping
--> Lysosomes: They are small round sacs that contain digestive enzymes which break down substances.
--> Nucleus: This is the largest and the most important cell organelle. It contains a thread-like network of chromatin granules which is extended to form the chromosomes. The chromosomes contain DNA( which is the molecule that houses the hereditary information of the cell).
--> Mitochondria: this is the site of chemical energy conversions for all cell activities. It is thus often called 'power house'.
--> Vacuole: this acts as a store house for many substances including excretory products.
--> Endoplasmic reticulum: these functions to distribute proteins and other materials throughout the cell.
--> Ribosome: these are sites for protein synthesis. They are found free in the cytoplasm or attached to the endoplasmic reticulum.
Related Questions
what stage of meiosis is seen here:
telophase
telophase 1
telophase 2
interphase
Answers
Answer:
It looks like Telephase 1
If dylan which has AB- has kids with O blood, could they have a child with O blood. Explain..
Answers
Answer:
They could not have O blood because blood types A and B are dominant and O blood is recessive. The only way They could have a child with type O blood is if Dylan was a carrier.
Explanation:
Punnet squares!
White-tailed deer populations in the Texas Hill Country have been increasing for years. The area is now overpopulated
with white-tailed deer. What is the most likely result of this overpopulation?
A White-tailed deer will all migrate out of the Hill Country in the order to avoid competing for food, water, and
space and will not retum until the resources recover from the overpopulation.
B White-tailed deer will experience increased competition for food, water, and space, and the deer will be
vulnerable to starvation and disease because the population exceeds the available resources
c White-tailed deer will stop producing offspring until the population returns to a level that can be supported by
the available resources in the area.
DWhite-tailed deer will become omnivores in order to have more available resources and avoid competing with
one another for food.
Answers
Answer: b
Explanation: I just feel like it’s the best answer choice
Answer:
B. The white tailed deer will experience increased competition for food, water, and space, and the deer will be vulnerable to starvation and disease because the population exceeds the amount of resources
Explanation:
My teacher just discussed this question in class, this is the right answer :)
What skills are needed to an Executive Director of Animal Research?
Answers
Answer:
The Executive Director also serves as the Attending Veterinarian, and is responsible for long-range planning, leadership, and oversight of animal care and use at UC Davis. The position manages and strategically harmonizes the distributed operations of over 1 million square feet of animal holding space in 200+ buildings that are overseen by individual vivarium managers.
The Executive Director leads a team of stakeholders that are responsible for identifying solutions that balance multiple and often-competing resource priorities. Cabinet members may include the Sr. Associate Vice Chancellor-Planning, Delivery and Facilities; Sr Associate Vice Chancellor-Finance and Resource Management; Institutional Animal Care and Use Committee (IACUC) Chair; IACUC Administrator; Associate Vice Chancellor-Facilities Management; a Vivarium Facility Manager Representative; Office of Research Representative; User Group representation; and Faculty Advisors designated by the Academic Senate. Each cabinet member (stakeholder) has an equal voice to identify issues and advocate for their respective constituencies but with the equally important responsibility of finding solutions that balance multiple, and often competing, resource priorities and the overriding campus needs.
The Executive Director serves in a public information, training, consultative, and facilitating role on behalf of the University's programs of animal care and use. The Executive Director supports the academic mission by assuring compliance with all applicable federal, state, and local animal welfare regulations that govern the use of animals in research and teaching. The Executive Director works in collaboration with the IACUC and IACUC staff to ensure regulatory matters are addressed, and that animal welfare and research facilitation are balanced with efficient daily operations and long-range academic and facility needs. The Executive Director provides advice to campus animal facility management, animal users, and administration regarding current standards for research and animal care. Serves as an ad-hoc member of the Institutional Biosafety Committee and is required by law as the Attending Veterinarian to serve as a voting member of the IACUC. May also serve as a member of the Ca Dept of Fish & Wildlife Animal Welfare Committee. The Executive Director oversees TRACS (Teaching and Research Animal Care Services); the entity that provides husbandry services to the majority of laboratory animal users on the Davis and Sacramento campuses. The Executive Director supervises the Associate Directors responsible for Campus Veterinary Services (CVS) and Husbandry Services (HS). CVS consists of three senior veterinarians and four veterinary technicians as well as several student employees. These services provide routine veterinary care and project support for most research and teaching animals on and off the UC Davis campus; and are responsible for the Laboratory Animal Residency Program that provides post-doctoral training for veterinarians who wish to specialize in Laboratory Animal Medicine. Physical Demands: - Walk, crouch, kneel, bend, and lift heavy items or animals up to 50 lbs.
- Stand for long periods on hard surfaces (e. g., clinical facilities, surgical suites).
- Lift, move, and bend in the restraint and treatment of laboratory animals. Work Environment: - USDA endorsement or attainment within 1 year of hire. - Valid CA driver's license required. Position will participate in the Department of Motor Vehicles (DMV) Pull Notice System.
- Rabies Vaccination and/or titer, Hepatitis B Vaccination and/or titer other titers/vaccinations as recommended by occupational health physician.
- TB test or chest x-ray, measles vaccination or proof of illness is required prior to employment and annually thereafter.
- Employee is personally responsible for following health and safety guidelines/instructions.
- Must be able to perform assigned duties wearing restrictive protective clothing such as respirators and other personal protective clothing.
- This position is subject to Medical Surveillance procedures and review in accordance with Federal and State Laws and Regulations and University Policy.
- Work flexible schedule.
This position is a critical position and subject to a background check. Employment is contingent upon successful completion of background investigation including criminal history and identity checks. Yes Qualifications Minimum Qualifications: - Doctor of Veterinary Medicine degree (DVM) from a recognized and accredited school of veterinary medicine; Licensed DVM in a state, with the attainment of CA license within 1 year of employment
The water vascular system of echinoderms (A) functions as a circulatory system that distributes nutrients to body cells. (B) functions in locomotion and feeding. (C) is bilateral in organization, even though the adult animal is not bilaterally symmetrical. (D) moves water through the animal’s body during filter feeding. 4. Which of the following combinations of phylum and description is correct? (A) Echinodermata—radial symmetry as a larva, coelom (B) Nematoda—roundworms, internal skeleton (C) Platyhelminthes—flatworms, gastrovascular cavity, no body cavity (D) Porifera—gastrovascular cavity, coelom
Answers
Answer:
The water vascular system of echinoderms (B) functions in locomotion and feeding.
Which of the following combinations of phylum and description is correct? (C) Platyhelminthes—flatworms, gastrovascular cavity, no body cavity
Explanation:
Echinoderms are marine animals. They have a water vascular system that make them able to move (locomation), respiration and food and waste transportation. This system is full of different canal along the body.
Echinodermata has not a radial symmetry as a larva, in fact it has a bilateral symmetry and coelom present. When it comes to Nematoda, they are roundworms and have a pseudocoelomate. Finally, porifera has a gastrovascular cavity and no coelom.
Using the sliding flament theory, explain (or draw) the process of sarcomere shortening. Start from the point where calcium would interact with troponin. Make sure to discuss the roles of actin, myosin, and ATP.
Answers
Answer:
Calcium binds to troponin CTroponin T moves tropomyosin and unblocks the binding sitesMyosin heads join to the actin forming cross-bridges ATP turns into ADP and inorganic phosphate and releases energyThe energy is used to impulse myofilaments slide producing a power strokeADP is released and a new ATP joins the myosin heads and breaks the bindings to the actin filamentATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, starting a new cycle Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.Explanation:
In rest, the tropomyosin inhibits the attraction strengths between myosin and actin filaments. Contraction initiates when an action potential depolarizes the inner portion of the muscle fiber. Calcium channels activate in the T tubules membrane, releasing calcium into the sarcolemma. At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. When calcium binds to troponin C, troponin T alters the tropomyosin position by moving it and unblocking the binding sites. Myosin heads join to the uncovered actin-binding points forming cross-bridges, and while doing so, ATP turns into ADP and inorganic phosphate, which is released. Myofilaments slide impulsed by chemical energy collected in myosin heads, producing a power stroke. The power stroke initiates when the myosin cross-bridge binds to actin. As they slide, ADP molecules are released. A new ATP links to myosin heads and breaks the bindings to the actin filament. Then ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, which starts a new binding cycle to actin. Finally, Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.
Which natural material is most often used to make paper?
Will give BRAINLY
Answers
Answer:
I believe that A Wood is correct
Need help with this
MATCHING - CULTURING TECHNIQUES
Agar Incubator
Media (medium)
Colony Inoculation
Mixed culture
Petri dish
Pure culture
1
Culture plate used to grow microorganisms
2
Derivative of seaweed; dissolves in hot water and
solidifies in cooling; substance on which bacteria grow
Food source for bacteria
3
4.
5
Transfer of microorganism to sterile quantity of
nutrients
Thermostatically controlled chamber which maintains
media at constant optimal temperature
Microbiological habitat that possesses two or more
types of organisms
Collection of one specific type of microorganism
6
7
8
Large cluster of microorganism visible to the naked
eye
Answers
Answer:
1 is petri dish and 3 is agar
A. Which two organisms are most closely related?
Answers
Yeasts are single-celled eukaryotic organisms. Yeasts undergo mitotic division when conditions are favorable. When limited nutrients are available, yeasts start dividing by the process of meiosis.
What is a likely reason for the change from mitosis to meiosis during reproduction under these conditions?
The process of meiosis produces greater numbers of yeast cells at a faster rate as compared to mitosis.
Crossing over of genes during meiosis increases diversity and the chance of survival of the next generation.
Duplication of genes during meiosis ensures efficient functioning of the newly formed yeast cells.
The yeast cells formed by meiosis are able to adapt as well as the parent cell because they are identical.
Answers
Yeasts change from mitotic to meiotic division when conditions are unfavorable because meiosis increases genetic diversity and improves their chances of survival in unfavorable conditions.
During meiosis, crossing over of genetic materials between non-homologous chromosomes creates genetic recombination and makes the resulting offspring to be genetically more diverse than their parents.
The increased genetic diversity will increase the chances of survival of the offspring in a constantly changing environment. In other words, the more genetically diverse a population is, the more their chances of surviving adverse environmental conditions.
More on genetic variability can be found here: https://brainly.com/question/13952713?referrer=searchResults
Which of the following traits make a good index fossil?
A small geographic range
B large body size
C short-lived as a species
D plants instead of animals
Answers
Answer:
d
Explanation:
An index must have animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time or environment
Short-lived as a species is the trait that make a good index fossil. Therefore, the correct option is C.
What is a fossil?A fossil is the remains or traces of a prehistoric organism, such as a plant, animal, or microorganism, that have been preserved in the Earth's crust over millions of years.
Index fossils are the fossils that are scarce in the time period and are frequently discovered as well as widely dispersed.Traits of a good index fossil are mentioned below:
It is one that existed for a relatively short period of time, which allows for precise dating of rock layers. They are remarkable and widespreadThey have a limited geologic timeThey are abundantThe other traits mentioned (small geographic range, large body size, and being a plant instead of an animal) are not necessarily indicative of a good index fossil. Therefore, the correct option is C.
Learn more about fossil, here:
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During protein synthesis, what carries amino acids to the ribosome?
Answers
Answer:
tRNA
Explanation:
The functional pathway for the gustatory system begins with taste cells, whose function is the ___1___ of taste. Taste cells form synapses with ___2___ whose cell bodies are found in the gustatory ganglion, and whose axons form the ___3___ and glossopharyngeal nerves. These axons terminate in the gustatory nucleus of the ___4___. The gustatory nucleus projects to the ___5___ of the thalamus whose function is the ___6___. These thalamic neurons project to the ___7___ in the parietal cortex/insular cortex and the function of these neurons is the ___8___ of taste. It is also important to mention an accessory pathway where only ___9___ information travels from the gustatory nucleus to a motor nucleus in the brainstem. This motor nucleus projects to muscle cells of the esophagus and stomach, producing reflexive ___10___.
Answers
Answer:
Explanation:
[tex]\text{From the given question, we are to copy and complete the passage.}[/tex]
[tex]\text{The functional pathway for the gustatory system begins with taste cells whose} \\ \\ \text{function is the} \ \mathbf{sensation} \ \text{of taste. Taste cells form synapses with the} \\ \\ \mathbf{gustatory \ afferent \ axons} \ \text{whose cell bodies are in the gustatory ganglion, }[/tex]
[tex]\text{and whose axon form the} \ \mathbf{vagal \ nerves} \text{and the glossopharyngela nerve.} \\ \\ \text{These axons terminate in the gustatory nucleus of the solitary nucleus.} \\ \\ \text{The gustatory nucleus project into the} \ \mathbf{ hypothalamus.} \\ \\ \text{These thalamic nucleus project into the} \ \mathbf{olfactory \ projection} \ \text{in the } \\ \\ \text{parietal cortex and function of these neurons is the} \ \mathbf{ sensation} \ \text{ of taste. } \\ \\[/tex]
[tex]\text{It is also important to mention an accessory pathway where only} \ \mathbf{sensory } \\ \\ \text{information travels from the gustatory nucleus to a motor nucleus in the brainstem.} \\ \\ \text{This motor nucleus projects to muscle cells of the esophagus and stomach, producing} \\ \\ \text{reflexive }\mathbf{arc}[/tex]
What are the characteristics of cephalopods?
Answers
Answer:Cephalopoda means "head foot" and this group has the most complex brain of any invertebrate. Cephalopods are characterized by a completely merged head and foot, with a ring of arms and/or tentacles surrounding the head. The arms, tentacles, and funnel are all derivatives of the foot.
Explanation:
Look at the pedigree below, does anyone in the 4th generation have cystic fibrosis?
A No
B Yes, just Child 2
C Yes, Child 1 & 2
D Yes, Child 3
E Yes, just Child 1
Answers
I think that is the answer
Answer:
C
Explanation:
Child 1 and 2 are both filled in and Child 3 is a carrier, as indicated by the key to the right of the pedigree.
In your own words, how would you describe Heredity in one sentence?
Answers
Answer: The passing on of traits and physical features from parents to children.
Explanation:
Hope this helps! Have a good day! :)
what are three animals that have good regeneration abilities? Describe the regeneration abilities of one of the animals in atleast 3 sentences
Answers
Answer:
i will give you a few options
Explanation:
Lizards who lose all or part of their tails can grow new ones. ...
Planarians are flat worms. ...
Sea cucumbers have bodies that can grow to be three feet long. ...
Sharks continually replace lost teeth. ...
Spiders can regrow missing legs or parts of legs.
Sponges can be divided
Answer Starfish
These five-limbed creatures can regrow arms that detach from their central disc, and some species have even been observed to complete the process in reverse: regrowing an entire body from a lost arm. To do this the starfish will store nutrients in the arm until it is able to regrow its
Mexican tetra
Researchers in Mexico last week described how they are studying cave-dwelling tetra fish to better understand why some animals can regenerate tissue but others can’t. The scientists performed surgery to remove some of the heart of river fish and cave fish from the species Astyanax mexicanus, finding that while some river fish do regenerate tissue, the cave fish just grew scars over the damage.
Salamander
The amphibious salamander can regrow a lost tail to full length. This process sees cells migrating to the wound and then slowly regenerating the tail within a few weeks. The finished appendage is completely functional and has all the features of the original, with the spinal cord and nerves growing back too.
Axolotl
A relative of the salamander but even more skilled at regenerating is the axolotl. This animal can regenerate not just its tail but also limbs, skin and almost any other body part. Researchers found that each time a limb was removed, it regrew almost perfectly. The pale pink creature has since become the focus of research into human limb regeneration.
Mexican tetra
Researchers in Mexico last week described how they are studying cave-dwelling tetra fish to better understand why some animals can regenerate tissue but others can’t. The scientists performed surgery to remove some of the heart of river fish and cave fish from the species Astyanax Mexicans , finding that while some river fish do regenerate tissue, the cave fish just grew scars over the damage.
Hemophilia is a recessive sex-linked disorder. A man with hemophilia has a daughter of normal phenotype. She marries a man who is normal for the trait. What is the probability that a daughter of this mating will be a hemophiliac? That a son will be a hemophiliac? If the couple has four sons, what is the probability that all four will be born with hemophilia.
Answers
Answer:
Hemophilia is an X-linked recessive trait.
Explanation:
A non-hemophiliac father and a hemophiliac mother have a son.
What is the percent chance that the son will be a hemophiliac?
Place the following items in the correct order from most simple at the top to the most complex at the bottom. Drag and drop the terms until you have the correct order.
Tissue, organ system, atom, organelles complex organism, cell, molecules, Organ,
Answers
Answer:
- atom
- molecules
- organelles
- cell
- tissue
- organ
- organ system
- complex organism
Explanation:
plants,protists,animals and fungi are made up of cells. true or false?
Answers
Answer the questions below. Will mark the correct answer as brainliest and report irrelevant answers.
Answers
Answer:
The reasons are the following.
Explanation:
Bear can live on land in a very cold regions of earth with the help of its thick skin and more hair on its body.
Frogs lives on lands due to its body structure and food availability. It has sticky tongue that captures insects.
Humans lives on lands not in water due to its body structure because its body structure can't allow humans to live in water due to absence of gills.
Seagull lives in the aquatic ecosystem because seagull feeds on fishes and other marine animals.
Sharks lives in water due to its body structure such as gills that are used to respire in water and the shark can't respire without water.
Meerkat lives in the arid climate because they lives underground to save themselves from the environment and the presence of food.
Protea lives in desert due to their dry skin that can tolerate the warm temperature.
Lions lives in the jungle due to the presence of food such as deer, buffalo etc and warm environment.
Dragonfly lives on land and water due to feed on the larva of mosquitoes that is present in the water bodies and good environmental conditions.
An _______________ is a group of organisms and other non-living parts of the environment that lives in an area.
Answers
Answer:
ecosystem
Explanation:
Optogenetics is a powerful tool that uses light to control the activity of specific neurons. These neurons contain artificially introduced light-gated ion channels. A number of different light-gated channels with different ion specificities have been either found in nature (such as the sodium-specific channelrhodopsin, originally found in green algae) or produced via genetic engineering (the production of a chloride ion-specific form of channelrhodopsin). There are also light-gated ion channels specific for potassium or calcium. Sort each light-activated channel type based on whether activation of this channel will tend to depolarize cells or not.
a. chloride channel
b. sodium channel
c. calcium channel
d. potassium channel
A. Promote Depolarization
B. Inhibit Depolarization
Answers
Answer:
Sodium and calcium promote depolarization
Chloride and potassium inhibit depolarization
Scientists want to determine whether the rapid economic growth in China between 1950 and 2000 caused a mass extinction of animal species during that time period. A mass extinction event is considered to occur when the rate of species extinction for exceeds the background extinction rate. The scientists collected data on the number of extinctions of selected vertebrate species in China between 1950 and 2000, as shown in below Table . Extinction rates were ascertained by measuring the werage percent of species lost(PSL).
The average percent of extinctions of 252 protected vertebrate specles in 2,365 countles in China from 1950 to 2000.
Mammals Birds Amphibians and Reptiles Background Rate
Average PSL ± 1 standard deviation 47.4 ± 339 19.75 ± 17.70 28.80 ± 28.86 27.21 ± 16.26
Which of the following is the null hypothesis most relevant for evaluating the data in Table?
a. There is no significant difference between the extinction rate of animals between 1950 and 2000 in China and the background extinction rate.
b. There is no significant difference between the extinction rates of mammals, birds, amphibians, and reptiles in China.
c. There is a significant difference between the extinction rate for mammals in China and the background extinction rate for mammals.
d. Because of climate change, habitat loss, pollution, and excessive exploitation of resources, China experienced a mass extinction event between 1950 and 2000.
Answers
Answer:
A
Explanation:
The null hypothesis is otherwise known as the hypothesis of no difference. In other words, the null hypothesis assumes that there is no significant difference between two or more data from populations that are being statistically compared. This is as opposed to the alternate hypothesis that assumes that there is a statistically significant difference between the data from the population being compared.
In the illustration, it is clearly stated that a mass extinction event occurs when the rate of species extinction exceeds the background extinction rate. Hence, the data collected on the extinction rates of different mammals need to be compared with that of the background extinction rate, and only a significantly higher extinction rate of the animals can lead to the conclusion that mass extinction has occurred.
The null hypothesis, therefore, would be that there is no significant difference between the extinction rates of the various animals and the background extinction.
The correct option is A.
The correct null hypothesis is "There is no significant difference in the rate of extinction of animals between 1950-2000 in China". Option A is correct.
The null hypothesis:It assumes that there is no difference between the two or more data that has been collected from the population and being statistically compared.
In the given scenario,
Scientists are looking for extinction rate differences of animal species between 1950 to 2000. Hence, option A is correct.Scientists are looking at the data as a whole not just as individual groups. Hence options B, C, and D are incorrect.Therefore, the correct null hypothesis is "There is no significant difference in the rate of extinction of animals between 1950-2000 in China".
Learn more about the null hypothesis:
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What is the difference between Desserts, Grasslands and Forests?
Answers
Answer:
yaeh
Explanation:
Forests occupy the most favourable environments, where moisture is adequate for growth and survival of a tall, dense vegetation dominated by trees. Deserts are found where moisture is so lacking that a continuous, permanent vegetation cover cannot be maintained. Grasslands lie between these two extremes
Explanation:
Desserts: A desolate terrain, especially one with little water or vegetation; a wasteland.
Grassland: An area dominated by grass or grasslike vegetation.
Forest: A dense collection of trees covering a relatively large area. Larger than woods.
What was the industrial revolution of peppered moth's
Answers
Answer:
Before the industrial revolution, peppered moths camouflaged with the bark on trees. During the the industrial revolution the bark of the trees darkened, so the white moths no longer camouflaged with the bark. However, the black moths did camouflage.
The cell membrane is a protective external layer that controls
which substances are allowed to enter and leave the cell. The
cell membrane performs the same function in the cell as which
structure in the human body?
Blood
Skeleton
Skin
Hair
Answers
Answer:
Skin
Explanation:
Skin is the protective external layer in the human body that allows substances such as water to leave/enter.
What system does the Borrelia burgdorferi bacteria enter from the tick to the host?
Nervous system
Muscular-skeletal system
Circulatory system
Respiratory system
Answers
How do T cells coordinate the immune system?
Answers
Answer: Helper T cells, or Th cells, coordinate immune responses by communicating with other cells. In most cases, T cells only recognize an antigen if it is carried on the surface of a cell by one of the body's own MHC, or major histocompatibility complex, molecules.
Explanation:
Answer:
T cells identify pathogens based on antigens on the surface of pathogens. The T cells then multiply and stimulate B cells to produce antibodies. The antibodies attach to the antigens, making the pathogens a target for phagocytes.
Explanation: sample response
HI
bacteria enter the body through contaminated foods, releasing harmful toxins that impair the body's ability to fight off infection. which body systems are involved in this scenario??
Answers
Answer:
Immune System is involved to fight against bacteria.