Answer:
D. Actin Filaments
Explanation:
Actin filaments are part of cytoskeleton and they are the central key player in maintaining cell shape and movement. So my guess is that since cytoskeleton is present, there is something likely wrong with the actin filament.
Even in the presence of the cytoskeleton, the shape is not maintained in the cell due to the damaged actin filaments. Thus, option D is correct.
What are actin filaments?Actin filaments are the part of the cytoskeleton that forms bundles and meshworks to provide the cell shape and structure. They are the central part of the cell shape and motion.
As the cytoskeleton is present then, there is the possibility that the actin filaments of the cells are damaged so that the cell is not able to maintain the cell shape.
Cell wall, capsules, and cilia have no role in the animal cell like the skin cells to maintain the cell shape as animal lacks cell wall in the structure and are not involved in providing cell shape.
Therefore, the actin filament is damaged.
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Estimate how many arteries branch off the aorta given that arteries have a diameter of 0.4 cm and a flow speed of 45 cm/s.
Answer:
Approximately 25 arteries would branch off
Explanation:
Aorta has a diameter of 2 cm, so area is pi x 1^2 = 3.142
In case of the artery, pi x 0.2^2 = 0.126
So dividing total area of aorta by total area of one artery, we get 3.142/0.126 = 25.021
Hence, about 25 arteries will be needed to carry the amount of blood that flows in the aorta vessel.
In the intrinsic pathway, the reaction begins with clotting factors from the _.
Answer:
Clotting factors are circulating in the blood.
Explanation:
In the intrinsic pathway, the body is responding intravascular damage through binding of platelets, exposure of chemicals or even collagen from endothelial membranes. The most of the clotting factors are synthesized by the liver and circulate around the blood stream until they are needed or until they are degraded based off their half lives.
When the platelets start to aggregate they release chemicals and have proteins that can attract the clotting factors. In the intrinsic pathway, clotting Factor XII starts off the cascade. Hope that helped :)
Electrons spin in shells around the nucleus. The closest shell (n = 1) can contain a maximum of____
electrons?
4
2
8
6
Answer: 2 electrons
Explanation:
The inner shell (1st shell) can hold 2 electrons, the next shell can hold 8 electrons and the third shell can hold 18 electrons.
Answer:
2 electrons
Explanation:
Electrons have various shells. The first one is called the K shell and it holds a maximum of two electrons.The next is the L shell (8 electrons), then the M shell and so on.
Which statement summarizes a change that occurs during photosynthesis?
Answer:
It converts light energy to chemical energy.
Explanation:
Its absorbing sunlight and changing in to chemical energy for the plants nutrients.
During photosynthesis, light energy will be changed into chemical energy.
What is photosynthesis?Photosynthesis was a process used mostly by plants as well as other creatures to transform sunlight into chemical energy which, via cellular respiration, might subsequently be produced to fuel the organism's functions.
What is chemical energy?Chemical energy was the energy that would be generated while chemical substances engage in a chemical reaction but also change into some other substances.
Therefore, during photosynthesis, light energy will be changed into chemical energy.
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The central (Haversian) canal that runs through the core of each osteon is the site of ________. adipose tissue and nerve fibers cartilage and interstitial lamellae blood vessels yellow marrow and spicules
Answer:
Blood vessels and nerve fibers
Explanation:
The Haversian canal serves as the bone tissues and it runs through the core of each osteon. The osteon surrounds the Haversian canal and contain structures called lamellae.
These lamella are made largely of collagen fibers and also various network of rich blood vessels and cells which produces blood cells in the body. Nerve cells which helps in the relay of impulses are also present. The rich contents of the bone gives it its strength and durability.
Answer:
The correct answer is: blood vessels and nerve fibers.
Explanation:
Haversian Canals are a group of tubes that are located in the more peripheral region of the bone, known as the cortical bone. The cortical bone is hard and compact and is composed of several concentric layers of bone cells (osteocytes and osteoblasts) that circle around a haversian canal, which contains capillaries and nerve fibers. This structure is called an osteon.
Haversian Canals are very important for the correct functioning of the bone, as they give the cells their needed blood supply and innervation.
Caffeine prolongs and intensifies the effects of epinephrine. Which of the following potential mechanisms of action of caffeine is consistent with this effect?
a. inhibits cAMP phosphodiesterase, the enzyme that converts cAMP to AMP.
b. a competitive antagonist of cAMP binding to PKA.
c. stimulates phospholipase Cb.
d. inhibits sarcoplasmic/endoplasmic reticulum Ca 2 + - ATPase.
e. activates PKC.
Answer:
a. inhibits cAMP phosphodiesterase, the enzyme that converts cAMP to AMP.
Explanation:
The phosphodiesterases are a group of enzymes that are capable of breaking phosphodiester bonds such as those between nucleotides in nucleic acids. The Cyclic adenosine monophosphate (cAMP) is a second messenger involved in intracellular signaling pathways. This molecule (cAMP) is hydrolyzed by the cAMP-dependent phosphodiesterase, which catalyzes the enzymatic breakdown of phosphodiester bonds (i.e., hydrolyzing cAMP to 5-AMP). The cAMP levels are modulated by the balance between its generation and the degradation via cyclic nucleotide phosphodiesterase.
The NADH and FADH2 molecules that are used during the reactions of the electron transport chain are derived from glycolysis, the preparatory reactions, and the citric acid cycle.
a) true
b) false
Answer:
The correct answer is option a) "true".
Explanation:
The electron transport chain that takes place in mitochondria during cellular respiration is interconnected with several other biological pathways in the cell. These pathways include glycolysis, the preparatory reactions, and the citric acid cycle, where NADH and FADH2 molecules are synthesized. In glycolysis and citric acid cycle, 2 NADH and 3 NADH molecules are synthesized, respectively. Regarding FADH2, one molecule of this compound is synthesized per each cycle of the citric acid cycle.
Mendel first crossed true-breeding plants to produce a second generation, which were then allowed to self-pollinate to generate the offspring. How do we name these three generations?
Answer:
P, F1 and F2
Explanation:
The first generation crossed which included the true breeding parents are the P generation plant. This produces the two subsequent generations which are the first filial generation (F1) and the second filial generation (F2).
1 2.1.5 Quiz: Specialized Cells and Tissues
Question 5 of 5
2 Points
Which statement best explains how the needs of a unicellular organism are
met?
A. Only its specialized cells work together.
B. All of its cells must work together.
C. Most of its tissues work together.
D. Its cell parts must do everything.
SUBMIT
Answer:
B. All of its cells must work together
Its cell parts must do everything explains the needs of a unicellular organism are met. So, the correct option is D.
What are Unicellular Organisms?A unicellular organism is also called as a single-celled organism, which is defined as an organism with a single cell, in contrast to a multicellular organism, which consists of many cells. Organisms fall into two categories: prokaryotic organisms and eukaryotic organisms.
Amoeba and Paramecium both are protozoans which belongs to Kingdom Protists that are unicellular organisms. Unicellular organisms are organisms that have only one cell that performs all vital functions including metabolism, excretion, and reproduction. Its cell parts must do everything explains the needs of a unicellular organism are met
Therefore, the correct option is D.
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Which component of a virus is injected into an infected cell? ribosome nucleic acid protein capsid mitochondrion
Answer: The component of virus is injected into an infected cell is RNA or DNA, aur nuclei acid.
Explanation:
Nucleic acid is injected into an infected cell.
What component is injected into the infected cell?During attachment and penetration, the virus attaches itself to a host cell and injects its genetic material into it. During uncoating, replication, and assembly, the viral DNA or RNA incorporates itself into the host cell's genetic material and induces it to replicate the viral genome.
What does the nucleic acid do in a virus?Nucleic Acid - Just as in cells, the nucleic acid of each virus encodes the genetic information for the synthesis of all proteins. While the double-stranded DNA is responsible for this in prokaryotic and eukaryotic cells, only a few groups of viruses use DNA.
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What is the defining characteristic of eusocial population a. If complex communication allows for the efficient transmission of information b. If the distance between social groups is greater than the mean subpopulation census c. if the effective population size is much less than the haploid deficiency value d. if there is complete division of roles within the society particularly with regards to reproduction
Answer:
d. if there is complete division of roles within the society particularly with regards to reproduction.
Explanation:
Eusocial insects are those insects that live in a colony with only some individuals capable of reproducing. usually there is division of labour with different individuals undertaking different roles such as defence or foraging. Examples of eusocial insects are bees, ants and wasps.
Hope it helps.
Statement that explains defining characteristic of eusocial population is D: if there is complete division of roles within the society particularly with regards to reproduction.
Eusocial population usually have extreme task specialization, and this usually help colonies to achieve gathering of resources.At times, due to constraints on independent breeding, they sometimes forgo reproduction.Therefore, option D is correct.
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Protein is needed for growth and repair.
The digestion of protein begins in the stomach and is completed in the small intestine,
What are the products of the digestion of protein.
Tick the correct box
amino acids
energy
sugars
vitamins
1 mark
Amino acids
O Energy
O Sugars
Vitamins
Answer:
Amino acids
Explanation:
Hope it helps.
Question 21 (5 points)
Which of the following terms describes a collection of hollow cells that implants on
the uterus wall after fertilization, but is not yet differentiated (in other words, all cells
are the same type of cell still)?
Fetus
Haploid
Mitosis
Blastocyst
Answer:
The answer is option D.
Blastocyst
Hope this helps
Answer:
Blastocyst
Explanation:
Once an egg is fertilized by a sperm, it begins to divide by mitosis into a 2, 4, and then 8 celled structure. Eventually, this large collection of cells keeps dividing and becomes a hallow collection of undifferentiated cells called a blastocyst. The blastocyst will implant on the wall of the uterus where it will begin to grow and develop during pregnancy into a fetus.
A science student makes the following statement: I think that plants grow faster in acidic soil than they do in normal soil. Which of these is the student doing?
The given question is incomplete. The complete question is as follows:
A science student makes the following statement:
I think plants grow faster in acidic soil than they do in normal soil.
Which part of the scientific process is this?
A. Analyzing data
B. Testing a hypothesis
C. Forming a hypothesis
D. Stating a theory
Answer:
C. Forming a hypothesis
Explanation:
The given statement is a "hypothesis" formed by a science student.
A hypothesis form a relationship between independent variable and dependent variable. Independent variable is the variable that a researcher or scientist controls while dependent variable is the variable that a scientist observes and measures.
So, in the given statement, independent variable is the concentration of acidic and normal soil and dependent variable is the growth of the plant, that the student will observe.
Hence, Student is making a hypothesis and the correct option is "C".
The psychologist most closely associated with the school of functionalism is
Answer:
Explanation:
Edward B. Titchener. Functionalists, including psychologists William James and James Rowland Angell, and philosophers George H, they stressed the importance of empirical, rational thought over an experimental, trial-and-error philosophy.
hope it helps
Which type of stress causes rocks to fold?
compression
shearing
strike-slip
tension
Answer:
A Compression
Explanation:
Since the rock cannot move, it cannot deform. This is called confining stress. Compression squeezes rocks together, causing rocks to fold or fracture (break) (figure 1). Compression is the most common stress at convergent plate boundaries.
I am generally found both inside and outside of the nucleus in a eukaryotic cell! DNA RNA BOTH?
RNA is found outside of the nucleus wile DNA is found inside the nucleus.
Eukaryotic cells have a true nucleus, which means the cell's DNA is surrounded by a membrane. Both the inner and outer membranes of the nuclear envelope are phospholipid bilayers. The nuclear envelope is punctuated with pores that control the passage of ions, molecules, and RNA between the nucleoplasm and cytoplasm.In eukaryotes, however, the DNA takes the form of compact chromosomes separated from the rest of the cell by a nuclear membrane.In eukaryotes, the cell's genetic material, or DNA, is contained within an organelle called the nucleus, where it is organized in long molecules called chromosomes.Learn more:
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what is cellular affinity in biology?
Answer:
affinity. Attraction between particles. Biology: A measure of the attraction of one biological molecule toward another molecule, either to modify it, destroy it, or form a compound with it. Examples are enzymes and their substrates, or antibodies and their antigens.
Jose Salazar has been hospitalized following a motor vehicle accident. He has several broken bones, including his left jaw, two ribs on the left side, and a compound fracture of his left leg. According to his medical record, he is 47 years old, his height is 5'9", and his weight is 171 pounds. During the course of his hospital stay, he was diagnosed with a heart arrhythmia. His current medications include lovastatin to lower his cholesterol, an MAO inhibitor to treat depression, and an analgesic to treat his pain. Mr. Salazar's wife also reports that he takes several herbal products including yohimbe, kava, valerian, and St. John's wort. Which herbal product taken by Mr. Salazar may be causing his heart arrhythmia?a. yohimbeb. kava kava onlyc. St. John's wortd. valerian onlye. both valerian and kava kava
Answer:
a. yohimbeb
Explanation:
Heart arrhythmia is a heart disease in which the heart does not work properly. The main cause of heart arrhythmia is yohimbeb which is used as a medicine for increasing sexual desires but this herbal product also has side effects such as causing heart problems such as heart arrhythmia and kidney diseases. So the Jose Salazar should avoid the consumption of yohimbeb in order to control the heart disease.
According to research, what role do genes play in determining whether someone will develop an anxiety disorder
Answer: Here are the options.
A. Unknown
B. No role.
C. Fully determines.
D. Can contribute but does not fully determine.
The correct option is D.
Can contribute but does not fully determine.
Explanation:
According to research, Genes can contribute to anxiety disorder but cannot fully determine because certain chromosomal or genes are linked to panic or anxiety disorder. Scientist discovered that RBFOX1 gene may make someone more likely to develop generalized anxiety disorder which shows that anxiety disorder are linked to genes. Anxiety disorder can be inherited and it is linked to specific genes.
Anxiety disorder is a feeling and not a mental illness. They symptoms of anxiety disorder are phobias, excessive worrying, memory problems, tensed muscles, irritability, struggle to sleep e.t.c. Some environmental factors also can contributed to anxiety disorder.
How did the death of chestnut tree result in the growth of the ecosystem
Answer:
add nutrients to the soil.
Explanation:
The death of chestnut tree result in the growth of the ecosystem because when the chestnut tree dies, the decomposers such as fungi and bacteria start feeding on the dead tree and as a result nitrogenous waste is produced mixed with soil which is the essential nutrient for the plants. These nitrogenous waste is used by the plants to make amino acids and as a result the growth of an ecosystem occurs.
What are gyres?
1.Large plants that move in circles in the ocean.
2.Large circulating parts of the ocean
3.Large animals in the ocean that move in circles in the ocean.
Answer:
A gyre is a circular ocean current formed by the Earth's wind patterns and the forces created by the rotation of the planet..
Explanation:
follow me plzzz
as an aspiring nurse,the need for the culture of a new pathogenic microorganism in the laboratory has been allocated to you. Applying all the guidelines involved in the successful isolation and cultivation of microbes, discuss the culturing system that is most appropriate for this activity and state your reasons for this choice
Answer:
The culturing system depends on the sort of microbe allotted to segregate namingly bacteria, viruses, or fungi. Each microbial pathogen has particular culture media for disconnection and for development or replication, we need culture media.for model bacterial pathogen can be separated by plating the example in fitting media by 3 strategies that are streak plate or pour plate or spread plate
Out of the above streak, plate gives the best outcomes in single disengaged provinces which can be additionally cultured and characterized for creation of pure culture
A biologist is studying how green sea turtles choose where to lay their eggs. She makes a hypothesis that because this species is related to other sea turtles through common ancestry, they probably all use the same process. This biologist formed her hypothesis using:________
a. A hunch
b. The unifying theory of evolution
c. Experimentation
d. The scientific method
e. Observations of green sea turtles' behavior
Answer:
Option b
Explanation:
Hypotheses are carried out as proposed explanation made on the basis of limited evidence which serves as a beginning point for further study.
The biologist in this case has a limited evidence with regards to this species which is just only about its ancestry, so her hypothesis was based on the unifying theory of evolution which is the framework within which biologists ask questions about the living world providing predictions with regards to directions about living things.
The correct answer, unequivocally, is (B).
- This is because she used her knowledge that, from an standpoint of evolution, these turtles were related to each other.
Match each of the following terms associated with the control of heart rate and blood vessel diameter with its defining term (e.g., integrating center, receptors, and so on).a. Parasympathetic neurons b. Carotid and aortic baroreceptors c. SA node d. Veins e. Sympathetic neurons f. Arterioles g. Ventricles h. Change in blood pressure i. Medullary cardiovascular centers1. Integrating center 2. Efferent neurons 3. Receptors 4. Stimulus 5. Target
Answer:
a. Parasympathetic neurons. Efferent neurons
b. Carotid and aortic baroreceptors. Receptors
c. SA node. Target
d. Veins. Target
e. Sympathetic neurons. Efferent neurons
f. Arterioles. Target
g. Ventricles. Target
h. Change in blood pressure - Stimulus
i. Medullary cardiovascular centres. Integrating center
Explanation:
The efferent parasympathetic pathway is considered to be part of the autonomic nervous system. The efferent parasympathetic control is produced by nerve signals that are transported from the central nervous system to their corresponding targets.
Targets are those tissues where nerve impulses are directed. These targets include the vascular system (i.e., arterioles, ventricles, veins, etc).
Receptors are specialized cells capable of detecting a stimulus and promote a response (i.e., an electrical impulse).
The integrating center of the nervous system is represented by the central nervous system (CNS). The CNS is composed by the brain and the spinal cord, it senses the stimulus and produces the corresponding nerve impulse (i.e., response).
Which statement summarizes the main purpose of photosynthesis?
OOO
It converts gases to solids in the form of sugar.
It converts carbon to oxygen.
It converts light energy to chemical energy.
It converts energy to mass.
Explanation:
it converts light enegry to chemical enegry. as it converts sun light enegry into food substances.
What should be done following health violations from an inspection?
Answer:
correct the identified
Explanation:
If health violations are found out during inspections, the inspector should give him warning about the violation or give him a ticket or fine. If high level of violation if found out, then the license of the restaurant or company should be cancelled.
What is heath violation?Health violation is avoiding the condition that are necessary for health during the process or manufacturing. These violation leads to the poor health of the people.
Health inspectors are the person who check the conditions of hotel and factories related to the health of the people. If they found any violation, the companies should correct them.
Thus, the inspector should issue him a warning about the infringement or issue him a ticket or fee if any health violations are discovered during inspections. If a serious breach is discovered, the restaurant's or business' license should be revoked.
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Researchers cross a corn plant that is pure-breeding for the dominant traits colored aleurone (C1), full kernel (Sh), and waxy endosperm (Wx) to a pure-breeding plant wiht the reccessive trains colorless aleurone (c1), shrunken kernal (sh), and starchy (wx). The resulting F1 plants were crossed to pure-breeding colorless, shrunken, starchy plants. Counting the kernals from about 30 eats of corn yields the following data:
Kernel Phenotype Number
Colored, shrunken, starchy 116
Colored, full, starchy 601
Colored, full, waxy 2538
Colored, shrunken, waxy 4
Colorless, shrunken, starchy 2708
Colorless, full, starchy 2
Colorless, full, waxy 113
Colorless, shrunken, waxy 626
6708
A) Why are these data consistent with genetic linkage among the three genes?
B) Perform a chi-square test to determine if these data show significant deviation from the expected phenotype distribution.
C) What is the order of these genes in corn?
D) calculate the recombination fraction between the gene pairs.
E) what is the interference value for this data set?
D) #recombinant=116+601+4+2+113+625=1462
#nonrecombinant=2538+2708=5246
RF=R/(N+R)=1462/6708=0.2
E) I=1-Q
I-interference
Q-coefficient of coincidence
Q=O2Xo/E2xo(2xo-double crossovers)
O2xo=6
P=(distance from C1 to Sh/100)*(distance from Sh to Wx/100)
=(3.38/100)*(18.28/100)=0.006
E2xo=0.006*6708=40.248
Q=6/40.248=0.15
I=1-0.15=0.85
state and explain five uses of insects
Answer:
They aerate the soil-
They pollinate blossoms
Some are are scavengers, and feed on dead animals and fallen trees, thereby recycling nutrients back into the soil.
They produce silk (worms)
they clean up waste
Which statement best describes monsoons?
They force cool, moist air from oceans to rise.
They are winds that blow in the opposite direction of a normal wind.
They bring heavy rain in the winter and in the summer.
They influence precipitation as wind moves near a mountain.
Answer:
The correct answer to the following question will be Option B and C.
Explanation:
Monsoon seems to be a change throughout the course including its predominant hot air flowing from either the south-western oceans of India towards India.The summer monsoon gives a luxurious atmosphere as well as heavy rains to something like the coastline of Asia (south-east), where many monsoon showers of rain undergo their rainy season throughout the winter.The other choices are not related to the given circumstances. So that Option B & C would be the appropriate choice.
Answer:
Pretty sure its B not sure tho. If its correct, mark as brainliest
Explanation: