Answer:
No. If cells lack cdc20, they can not progress into anaphase.
Explanation:
Many regulator molecules act during the different stages of the mitosis process to make it possible.
You need to know that there are too many factors interacting with each other, activating and deactivating to pass from one stage to another. Here, we are mentioning only a few of them, with the principal goal of answering the question.
Cyclins are proteins that regulate the whole cell cycle. There are different types of cycling, each of them acting on a different stage. When the cell is going through one of the stages, the only cyclin in high levels is the one that is regulating that phase. Once that stage is over, that cyclin concentration decreases, and the following one increases. For instance, cyclin M regulates the metaphase, and when the cell is going to the anaphase, cyclin M decreases while cyclin A increases. Cohesin proteins keep sister chromatids together during cellular division. In metaphase, sister chromatids are held together until they reach the Anaphase, during which another enzyme activates to break the bonds and separate the chromatids. This protein is the separase. During metaphase, separase is inhibited by securin, which is another protein. But when the cell is going in anaphase, separase activates to break the bonds. The anaphase-promoting complex/cyclosome, APC/C, controls the progression of mitosis. It is inactive until the cell reaches the metaphase stage. During metaphase, APC/C joins the substrate Cdc20 and together regulate the transition from metaphase to anaphase.The complex regulates the presence of cyclin M at the final stages of metaphase to allow cyclin A to increase. It also degrades inhibitors such as securin. Through this action, it activates separase, letting the sister chromatids separate during anaphase.
So the complex APC/C-Cdc20 controls the transition metaphase-anaphase. It promotes anaphase and activates separase by degrading Cyclin M and securin.
Some studies about the complex APC/C-Cdc20 have proven that whenever Cdc20 is lacking or blocked, cyclin M and securin accumulate, and the cell can not go from metaphase to anaphase and the mitosis process stops. Researchers concluded that Cdc20 is essential for the transition from one stage to the other.
When Cdc20 is lacking, APC/C can not activate to accomplish functions such as degrading Cyclin M and securin.
If cyclin M remains present, the cell can not go to the anaphase. If securin remains present, separase remains inhibited and chromatid sisters can not separate.During the normal cardiac cycle, the bicuspid valve opens when: the pressure in the right ventricle is greater than in the right atrium b. the pressure in the right atrium is greater than in the right ventricle c. the pressure in the left atrium is greater than in the left ventricle d. the pressure in the left ventricle is greater than in the left atrium e. the pressure in the right ventricle is greater than in the pulmonary artery
Answer:
b. the pressure in the right atrium is greater than in the right ventricle
Explanation:
A bicuspid valve is an aortic valve that only has two leaflets, instead of three. The function of aortic valve is to regulates blood flow from the heart into the aorta. The valve opens and closes because of pressure differences. The opening of the valve occurs when the pressure is greater in the left atrium than ventricle whereas, closing happens when there is greater pressure in the left ventricle than atrium so we can conclude that the pressure in the right atrium is greater than in the right ventricle.
Which of these is a long-term human health issue likely caused by air pollution?
A. Bioremediation
B. Damaged hearing
C. Dementia
D. Heart disease
Answer:
D
Explanation:
Heart disease is a long-term human health issue that is likely caused by air pollution. Thus, the correct option is D.
What is Air pollution?Air pollution may be defined as any unwanted or contaminated impurities present in the air of living surrounding that causes harmful health effects to organisms.
Dementia is caused by the loss of nerve cells and their significant connections in the brain and is not likely the source of air pollution.
Majorly heart diseases are caused by the inhalation of contaminated air that forms a layer of harmful substances in the heart and lungs. Some of them include lung cancer, cardiovascular death, asthma, etc.
Therefore, the correct option for this question is D.
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Which best describes the sympathetic nervous system?
the brain and spinal cord
rest and digest
fight or flight
the sensory and motor neurons
Answer:
the answer to this question is fight or flight
How gamete formation leads to genetic variation.
Answer:
The process that produces gametes is called meiosis. During meiosis, homologous chromosomes (1 from each parent) pair along their lengths. ... At each chiasma, the chromosomes break and rejoin, trading some of their genes. This recombination results in genetic variation.
Answer:
Explanation:
During fertilisation, 1 gamete from each parent combines to form a zygote. Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote.
Which of the following has the highest sodium content?
A) Fresh fruits and vegetables
B) Lunchmeats, processed cheeses and canned soup
C) Mild, roast beef sandwich
D) Tossed salad with vinegar and oil dressing
Answer:
b
Explanation:
I think that's right since canned food has a lot of sodium to help preserve
As the amount of light received by this plant increases, its rate of
photosynthesis HELP!!!!!!
why do the body need specialized cells?
Answer: Hello, There! your Answer is Below!!
specialized cells allow for different types of tissues to exist in our organs, so that the organs can perform different functions in our organ systems.
Explanation:
Cell specialization allows new cells to develop into a range of different tissues, all of which work together to make living organisms function as a whole.
Hope this helps!!!
Have a great day!!!
¿Qué sucede con un pasajero que está de pie en un autobús cuando este inicia el
movimiento?
¿Por qué sucede eso?
Answer:
El pasajero se mueve hacia atrás.
Explicación:
Cuando el autobús comienza a moverse hacia adelante, el pasajero que está parado en un autobús se mueve hacia atrás debido a la inercia. La inercia es una propiedad en la que un cuerpo resiste cualquier cambio en su estado de reposo o movimiento. Al principio, el pasajero está en reposo, por lo que cuando el autobús comienza a moverse en la dirección de avance, el pasajero se mueve en la dirección de retroceso para permanecer en reposo debido a la propiedad de la inercia. Por eso el pasajero se mueve hacia atrás.
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Plants contains many cells (multi-cellular) and are called
Answer organism
Explanation:
Answer:
Eukaryotic cells.
Explanation:
Plant and animal cells are eukaryotic, meaning that they have nuclei. Eukaryotic cells are found in plants, animals, fungi, and protists.
All multi-cellular organisms are Eukaryotic.
I hope this helps!
PLEASE HELP ME ON BOTH QUESTIONS ASAP!!!!! GIVING 13 POINTS AWAY!!!!!!
Answer:
the awnser for the first question i think is D because a funnel is used to clean water of contaminants.
Explanation:
the awnser for the second question is A.
Which is the best description of thrust fault?
O A. A high-angle fault under tension
B. A low-angle fault under tension
C. A low-angle fault under compression
A
O D. A high-angle fault under compression
Answer:
D: A high-angle fault under compression
Explanation:
Answer:
A high-angle fault under compression
Explanation:
PLEASE HELP ASAP!!!
13. Populations of organisms grow at an _______ rate, but ____ factors such as food, habitat, predators, weather, disease, climate, & temperature can affect the maximum population size an area can support.
14. Sea otters are an example of a _________ species where the effects of overhunting this population of organisms will severely affect the population #s of other species.
15. _______ is determined by the # of species in a specific area as well as the # of different kinds of species in a specific area.
Answer:
. Exponential, limiting
14. Keystone
15. ecosystem
Explanation:
Plzplz ppz help with this riddle! Links will be reported. Thank you!
Answer: Hello Luvv
Green st patrick's day.
Explanation:
Hope this helps
Mark me brainset please.
Anna ♥
Answer: Hello!....
Patricks Day
Explanation:
Mark me brainest please. Hope I helped! Hope you make an 100%
-Anna♥
Describe how and why this happens (try to do an easy description)
A comet in space continues to move without slowing down or slowing up.
Answer:
because there is no force acting in the comet making it able to go on forever without change in its path or speed
explanation
newton's first law
According to the Punnett Square shown above
A.
there is a 50% probability that an offspring will have brown eyes and a 50% probability that an offspring will have blue eyes.
B.
there is a 75% probability that an offspring will have blue eyes and a 25% probability that an offspring will have brown eyes.
C.
there is a 75% probability that an offspring will have brown eyes and a 25% probability that an offspring will have blue eyes.
D.
there is a 100% probability that an offspring will have one brown eye and one blue eye.
Answer:
C. There is a 75% probability that an offspring will have brown eyes and a 25% probability that an offspring will have blue eyes.
Explanation:
Note that the brown eyes is the dominant trait, denoted by B, while blue eyes is the recessive trait, denoted by b. In all cases of the Punnett square, if there is a dominant and recessive trait, the dominant trait will always come out on top.
The given Punnett square:
[tex]\left[\begin{array}{ccc}&B&b\\B&BB&Bb\\b&Bb&bb\end{array}\right][/tex]
Note that there are 3 options (BB, Bb, Bb) respectively, in which there is the dominant trait B (brown eyes). Only in one case is there only the recessive trait b (blue eyes), or a 1/4 chance of obtaining blue eyes. Therefore, there is a 3/4 chance of obtaining a brown eye:
C. There is a 75% probability that an offspring will have brown eyes and a 25% probability that an offspring will have blue eyes.
Which of the following lists accurately represents the increasing complexity of genetic materials?
O base pairs, DNA, gene, chromosome, cell
O DNA, base pairs, gene, chromosome, cell
O gene, chromosome, cell, base pairs, DNA
gene, chromosome, DNA, cell, base pairs
The correct answer is A. Bases pairs, DNA, Gene, Chromosome, Cell.
Explanation
Nitrogen bases are chemical compounds that compose DNA and RNA, in the case of DNA the bases are adenine, thymine, guanine, and cytosine, while RNA is made up of uracil, adenine, guanine, and cytosine. Additionally, DNA makes up genes, which are structures that store information that is passed on to offspring. Also, genes are organized to form chromosomes (more complex structures) of genetic information. Finally, there are cells, in them are chromosomes, fundamental for the reproduction of an organism. Therefore, the correct answer is A. Bases pairs, DNA, Gene, Chromosome, Cell.
How do adaptations help species manage competition
Answer:
Adaptations create a unique niche that is not shared by organisms of another species, thus managing competition for resources between species.
At high temperatures enzyme activity declines
because of:
Answer:
protein get denatured
Explanation:
at high temperatures enzyme activities in our body decline due To the proteins getting denatured
A farmer selects only the largest tomato plants to reproduce over multiple generations. What type of selection is this an example of?
Sexual Selection
o
Evolution
o
Natural Selection
o
Artificial Selection
Answer:
Artificial selection
Explanation:
The farmer is selecting the most desirable traits and breeding the tomatos to achieve these traits in future generation. A human is artificially altering evolution.
Kendrick made a model that included kidneys, liver, large intestine, and bladder. What is the main function of the body system that Kendrick built a model of?
Answer:
A
Explanation:
The main function of the body system that Kendrick built a model of is it gets rid of wastes that the body produces. So, the correct option is A.
What is Body system?A body system is defined as a collection of tissues and organs that cooperate to perform a single function for the body. Digestive system, respiratory system, circulatory system and nervous system are some examples of body systems.
The primary purpose of the bodily system that Kendrick modeled is the elimination of waste products that the body produces. The body's excretory system, which includes the kidneys, liver, large intestine and bladder, is responsible for eliminating waste products from the body and maintaining a healthy balance of fluids and electrolytes.
Therefore, the correct option is A.
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Using examples where supportive, discuss the following statement, "From vaccinations and diagnostics, to explaining the root causes of many diseases, immunology is having a profound impact on life today"
Answer:
Yes.
Explanation:
Yes, immunology is having a profound impact on life today because this immunology provides information about the study of immune system. To find out the root cause of many disease, the study of immune system and its responses against many diseases are important in order to counter the infection. The immune system protects us from infection through various defense mechanism. If the immune system is not working properly, it can result in disease, such as autoimmunity, allergy and cancer etc.
What is the difference between anatomy and physiology?
Answer:
4th Option
Explanation:
Anatomy is the study of the body's structures; physiology is the study of how the body's structures function.
Answer:
Explanation:
the answer is c
Phalloidin is a toxin from a toadstool (mushroom). You are studying actin dynamics and the effect of phalloidin. You add G-actin and ATP to a test tube and allow the reaction to come to equilibrium. This produces the light scattering plot below. When you add phalloidin, what will happen to the line?
Answer:
Dissociation of actin subunits occurs.
Explanation:
When we add phalloidin to a solution containing G-actin, the phalloidin binds to actin filaments more tightly as compared to actin monomers which leads to a decrease in the constant rate of dissociation of actin subunits from the ends of the filament. This dissociation stabilizes the actin filaments through the prevention of filament depolymerization. So we can conclude that addition of phalloidin to actin leads to stabilizing of actin filaments.
What is the prediction of weather called?
Please help ASAP!
Survey
Prediction
Forecast
Poll
An organisms phenotype is
A. Its parents genes
B. Its genetic make up
C. Its physical appearance
D. Its heterozygosity
Answer:
C) Its physical appearance
Explanation:
The way I remember what phenotype is, is that both physical and phenotype begin with a p.
Hope this helped :)
please help me, i will mark u brainliest if it is correct :)
You are studying a disorder that is based on the genetic composition at three loci. Assume that a dominant allele at any locus adds 5 units of risk for the disorder and that a recessive allele at any locus adds 3 units of risk for the disorder. Individuals with 26 or more units of risk develop the disorder. The environment does not affect the presence or absence of this disorder. How many risk units will be present in an individual of genotype AABbcc
Answer:
24
Explanation:
Given that:
At either locus, the expression of the dominant allele increases the risk by 5 units.
The assigned genetic sequence "AABbcc" has three dominant alleles, implying that it increases risk by 15 units.
At any locus, the expression of the recessive allele increases the risk by three units. The assigned genetic sequence "AABbcc" has three recessive alleles, which means it increases the chance by 9 units.
In an individual with the genotype AABbcc, the total number of risk units is = 15+9 = 24. This implies that the person does not develop the disease).
Plz help What happens to chromosomes during crossing-over?
1. Sister chromatids are pulled apart by spindle fibers.
2. Sister chromatids separate at the centromere.
3. Homologous chromosomes exchange corresponding segments of DNA.
4. Homologous chromosomes move from one side of the cell to the other.
Answer:
How does crossing over affect the alleles of a chromosome?
Since the chromosomes are homologous, breaks at corresponding points mean that the segments that are broken off contain corresponding genes, i.e., alleles. ... Crossing over results in recombination of genes found on the same chromosome, called linked genes, that would otherwise always be transmitted together.
Why are free radicals a problem?
Answer:
Free radicals are unstable atoms that can damage cells, causing illness and aging. Free radicals are linked to aging and a host of diseases, but little is known about their role in human health, or how to prevent them from making people sick.
Explanation:
Answer:
free radicals are unstable atoms uwu
factors that affect one's growth
Answer:
10 Factors That Influence the Growth and Development of a Child:
HeredityEnvironmentSexExercise and HealthHormonesNutritionFamilial InfluenceGeographical InfluencesSocio-Economic Status Learning and ReinforcementExplanation: