Answer:
This type of diffusion proceeds without an input of energy. In simple diffusion, molecules that are small and uncharged can freely diffuse across a cell membrane. They simply flow through the cell membrane. Simple diffusion does not require energy or need the assistance of a transport protein.
Explanation:
Answer:
simple diffusion is the process by which solutes are moved along a concentration gradient in a solution or across a semipermeable membrane. Simple diffusion is carried out by the actions of hydrogen bonds forming between water molecules and solutes. Water molecules move in to surround individual solute molecules, which maximizes hydrogen bonding. Hydrogen bonds are extremely temporary, however, and the solution is constantly stirred as a result.
Explanation:
cuh
The image shows an insulating strip being added to windows in a home.
Insulation strips help to solve one part of a complex problem. Insulation
lowers the need for air conditioning in summer and heating in winter.
However, it can also contribute to poor ventilation.
Which problem are insulation strips most likely helping to solve?
A. Public health issues
B. Community aesthetics
C. Environmental impact of generating electricity
D. Reliability of power supply
Answer:
C. Environmental impact of generating electricity
Explanation:
plzz help me to do this please
Answer:
idek
Explanation:
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.
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?
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.
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 :)
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
Answer:
1 is petri dish and 3 is agar
What is the purpose of chromosome. A used to pass on genetic traits.B form into haploid cells, making reproduction possible. C are the chemicals needed for mitosis to occur. D are responsible for matching hair colors.
Answer:
A. used to pass on genetic traits
Explanation:
I know things.
Bacteria that can live in extreme environments.
thermophiles
halophiles
methanogen
all of the above
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
Answer:
Skin
Explanation:
Skin is the protective external layer in the human body that allows substances such as water to leave/enter.
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??
Answer:
Immune System is involved to fight against bacteria.
Sometimes, you can look at a baby and say things like, “She has her mother’s eyes and her father’s nose.” Why is this only possible with organisms that reproduce sexually?
Answer:
Because through fertilization, we have the union of half of the paternal and maternal patrimony. In asexual reproduction, on the other hand, the child organisms will be the same as the organism that generated them
Answer:
what she said or he
Explanation:
What are the characteristics of cephalopods?
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:
Eye color is also determined by genes. Brown eyes are dominant, and blue eyes are recessive. What must be true for two brown-eyed parents to produce a blue-eyes child?
Answer:
The brown-eyed parents must be HETEROZYGOUS to produce a blue-eyed child
Explanation:
This question involves a single gene coding for eye color in humans. The allele for brown eyes (B) are dominant over the allele for blue eyes (b). This means that an individual that is heterozygous (Bb) will phenotypically have a brown eyes.
According to this question, a blue-eyed child (bb) will be produced when two brown-eyed parents are HETEROZYGOUS (Bb) for the eye color trait. This means that each of the parent donated the recessive allele (b) to produce the (bb) offspring. Please find the punnet square attached.
Answer:
They each pass on the blue-eye allele
Explanation:
If both parents carry a recessive blue eye gene, then it is possible for the parents to produce a blue-eyed child. The parents must be heterozygous for the eye color trait in order for this to happen. Their genotypes are not the same genes for a trait and are not (BB) or (bb) but instead (Bb). If both parents carry the recessive trait of having blue eyes, they may be able to produce a blue-eyed child.
What does measles cause by
Answer:Measles is a highly contagious virus that lives in the nose and throat mucus of an infected person. It can spread to others through coughing and sneezing. If other people breathe the contaminated air or touch the infected surface, then touch their eyes, noses, or mouths, they can become infected.Measles is caused by a virus in the paramyxovirus family and it is normally passed through direct contact and through the air. The virus infects the respiratory tract, then spreads throughout the body. Measles is a human disease and is not known to occur in animals.
It usually begins as flat red spots that appear on the face at the hairline and spread downward to the neck, trunk, arms, legs, and feet. Small raised bumps may also appear on top of the flat red spots. The spots may become joined together as they spread from the head to the rest of the body.
Explanation:
Answer: GoodMorning: ) ✨ Measles is a highly contagious virus that lives in the nose and throat mucus of an infected person. It can spread to others through coughing and sneezing. If other people breathe the contaminated air or touch the infected surface, then touch their eyes, noses, or mouths, they can become infected.Measles is caused by a virus in the paramyxovirus family and it is normally passed through direct contact and through the air. The virus infects the respiratory tract, then spreads throughout the body. Measles is a human disease and is not known to occur in animals.
It usually begins as flat red spots that appear on the face at the hairline and spread downward to the neck, trunk, arms, legs, and feet. Small raised bumps may also appear on top of the flat red spots. The spots may become joined together as they spread from the head to the rest of the body.
Have a Nice Day/Night <3 .
Q1.What does the pH scale measure?
Q2. What is the pH of neutral solution?
Q3.What range of pH strong alkali have?
Q4.Which colour does Universal indicators go in acids?
Answer:
Explanation:
The pH scale is used to measure acidity and alkalinity The pH of neutral solution is 7.Strong alkali have pH range of 7.35-7.45.The colours from yellow to red indicate an acidic solution.hope it helps :)
8. Describe sexual selection. How can it lead to evolution?
Answer:How does sexual selection affect evolution?
Explanation:
Sexual selection, theory in postulating that the evolution of certain conspicuous physical traits—such as pronounced coloration, increased size, or striking adornments—in animals may grant the possessors of these traits greater success in obtaining mates.
what are three animals that have good regeneration abilities? Describe the regeneration abilities of one of the animals in atleast 3 sentences
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.
rigor mortis occurs when a muscle cell runs completely out of ATP. true or false
Answer:
True
Explanation:
During a contraction cycle, ATP attaches to myosin and allows the muscle contraction to start again. Without ATP, muscles would remain in their contracted state, and would be unable to return to their relaxed state.
A. Which two organisms are most closely related?
What is the difference between Desserts, Grasslands and Forests?
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.
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___.
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]
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
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.
In your own words, how would you describe Heredity in one sentence?
Answer: The passing on of traits and physical features from parents to children.
Explanation:
Hope this helps! Have a good day! :)
What skills are needed to an Executive Director of Animal Research?
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
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.
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:
https://brainly.com/question/4454077
What does cell theory refer to
Answer:
Cell theory refers to the idea that cells are the basic unit of structure in every living thing. Development of this theory during the mid 17th century was made possible by advances in microscopy. This theory is one of the foundations of biology.
47
Which table shows two steps of DNA replication?
А
Step 1
DNA Polymerase matches uracil to
thymine and cytosine to guanine,
Step 2
Two identical DNA double helixes are
produced
B
Step 1
Step 2
DNA Polymerase matches cytosine to Two separate but complementary
thymine and uracil to guanine.. Single DNA strands are produced
С
Step 1
DNA Polymerase matches adenine to
thymine and cytosine to guanine.
Step 2
Two identical DNA double helixes are
produced
Step 1
DNA Polymerase matches uracil to
thymine and adenine to guanine.
Step 2
Two separate but complementary
single DNA strands are produced.
DNA replication involves the doubling of the DNA double helix. It basically is the production of a new complimentary strand of DNA from an old template strand.
Two steps of DNA replication from the tables include:
Option С
Step 1
DNA Polymerase matches adenine to thymine and cytosine to guanine.
Step 2
Two identical DNA double helixes are produced
DNA replication involves the nitrogenous bases adenine, guanine, thymine and cytosine. Uracil is utilized in transcription not replication. At the end of replication, two identical double helixes are produced with one being the old strand used as template and the other the new strand.Learn more about DNA replication: https://brainly.com/question/1045311
plants,protists,animals and fungi are made up of cells. true or false?
and dragons, the shiny scales (S) are dominant to dull scales (s) and fire breathing (F) is dominant to smoke breathing (f) if a SsFf is crossed with a SsFf,
what is the likelihood of a dull-scaled, smoke breathing dragon?
-0/16
-9/16
-3/16
-1/16
Answer:
1/16
Explanation:
Out of the 16 combinations, only 1 is ssff. So 1 dragon out of the possible 16 will have dull scales and will be smoke breathing. Sorry if the punnett squares are messy and confusing
Cystic fibrosis , which is a mutation that causes issues in an individual's respiratory system. True or false
Answer:
This is True.
Explanation:
Cystic Fibrosis, also called CF, is an inherited life-threatening disorder which causes immense damage to the lungs and digestive system. Cystic fibrosis changes the cells that produce mucus, sweat, and digestive juices. By changing these cells, it causes these fluids to become thick & sticky. They then plug up tubes, ducts, and passageways.
During protein synthesis, what carries amino acids to the ribosome?
Answer:
tRNA
Explanation: