Answer:
Mitosis is the process in which the nucleus of a eukaryotic cell divides. During this process, sister chromatids separate from each other and move to opposite poles of the cell. This happens in four phases, called prophase, metaphase, anaphase, and telophase
Meiosis reduces chromosome number and rearranges genetic information. Explain how the reduction and rearrangement are accomplished in meiosis. Several human disorders occur as a result of defects in the meiotic process. Identify one such chromosomal abnormality; what effects does it have on the phenotype of people with the disorder
Answer:
Explanation:
Meiosis is a form of cell division that occurs in the sex cells of organisms. It ensures the reduction of a diploid cell to an haploid cell to allow for the formation of a diploid zygote after fertilization (contribution of both parents haploid sex cells to give a diploid zygote). Thus, this process is very essential and important.
The reduction is accomplished by 2 divisions after the duplication of chromosomes
- first division: separation of homologous pairs of chromosomes (this reduces the total in half)
- second division: separation of sister chromatids of a chromosome.
The rearrangement in meiosis occurs by crossing over/genetic recombination.
This is the exchange of genetic material between homologous pairs of chromosome bringing about a rearrangement and genetic variation
An example of a chromosomal abnormality that arises as a result of defects in this process is the Down Syndrome which is caused by a nondisjunction of the chromosomes 21 pair in a sex cell.
This condition produces offsprings that have some characteristic facial features, short stature etc
Rearrangement takes place at the time of meiosis with the lining of chromosomes pair during the metaphase 1 and 2. Down syndrome is the example of chromosomal abnormality.
• A process in which a single cell differentiates two times to generate four cells comprising half the original amount of genetic information is termed as meiosis.
• During meiosis, the process of rearrangement takes place when the chromosomes line up in pairs at the time of metaphase 1 and 2. Then in anaphase 1 and 2, the separation of these chromosomes takes place and each gamete gets one of each kind of chromosome.
• One of the examples of chromosomal abnormality is Down syndrome, which is, illustrated by the third copy of chromosome 21. The phenotypic variability, which takes place during Down syndrome is muscle hypotonia at the time of birth, and cognitive impairment.
Thus, during meiosis reduction and rearrangement of chromosomes takes place, and one of the chromosomal abnormality is the Down syndrome.
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How would relaxing the smooth muscles in arteries affect blood pressure?
A. Muscle contraction is not related to blood pressure
O B. Blood pressure would stay the same
O C. Blood pressure would decrease
D. Blood pressure would increase
ASAP!
Answer:
Blood pressure would decrease
The relaxing the smooth muscles in arteries affect blood pressure is O C. Blood pressure would decrease.
What is the smooth muscles?Smooth muscle is gift at some stage in the frame, wherein it serves lots of features. It is withinside the belly and intestines, wherein it facilitates with digestion and nutrient collection. It exists at some stage in the urinary system, wherein it features to assist rid the frame of pollutants and works in electrolyte balance.
Hypertension. By inflicting vascular easy muscle relaxation, CCBs lower systemic vascular resistance, which lowers arterial blood pressure.
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The photo shows plates of rock breaking away from a large mass of rock.
Which form of weathering is occurring in the photo?
A. Oxidation
B. Carbonation
C. Abrasion
D. Exfoliation
Answer:
D, exfoliation
Explanation:
Exfoliation is a form of mechanical weathering in which curved plates of rock are stripped from rock below.
Exfoliation APEX USERS
If blood flow in the capillaries of the alevoli was reduced what would be the effect?
Explanation:
Intrinsic diffusion barriers between alveoli and capillaries can result in hypoxemia.
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Answer:
less o2
Explanation:
what do scanning electron microscopes and transmission electron microscopes have in common
Answer: Both require a vacuum.
The transmission electron microscope and scanning electron microscopes are two microscopic techniques which uses a high speed and energy electron beams to create an image of the specimen. Scanning electron microscopy creates the image of the specimen by detecting reflected electrons from specimen whereas transmission electron microscopy involves transmission of electrons by the specimen. Both scanning and transmission electron microscopes require vacuum. The flow of electrons is facilitated by a chamber maintained at high vacuum. The vacuum increases the speed and energy of electrons interacting with the specimen.
Answer:Both require vacuum
Explanation:
Plants absorb sunlight through Photosynthesis. Which characteristic of life is this an example of?
Answer:
It is "The ability to process energy."
If for some reason that's wrong, it is "The sensitivity/response to environment."
which was most likely an effect on society that resulted from Improvements in blood handling during world war 1 and world was 2
Answer:More soldier who had lost a limb returned home.
What other adaptation could have helped koalas as they evolved from land-dwellers to tree-dwellers?
Answer:
I believe it is
fur color that closely matches the eucalyptus bark color
or B
Explanation:
My reasoning is that, if they evolved from land-dwellers to tree-dwellers, they will have almost no need for longer legs for running, as they only need strong legs and arms for climbing, not running.
The ability to communicate better doesn't really mean anything, as they are now all closer or further away, since they are all in trees now. This doesn't mean that they necessarily need to communicate better.
The ability to have several offspring at one time could be the answer, but isn't really necessary.
Predators would hunt for the koalas in the trees now, so to hide, they would need to go inside the tree trunk or camouflage themselves, which most creatures do by blending into their surroundings or changing skin color over time.
I got this question on Edge 2021 biology finals so...
Which nucleic acid is pictured on the right? Justify your answer.
Answer:
Nucleic Acids:
- Uracil
- Adenine
- Guanine
- Cytosine
Explanation:
Since we only have one strand shown, I'm going to assume it is RNA. Both DNA and RNA have nucleic acids, but RNA has 1 different nucleic acid; it replaces Thymine with Uracil. So the 4 nucleic acids are uracil, adenine, guanine, and cytosine.
If the picture shown is a cross-section of DNA, then our 4 nucleic acids are adenine, thymine, guanine, and cytosine.
Answer:
RNA is pictured on the right, with one strand of nucleotides consisting of a phosphate group, the sugar ribose, and one of four nitrogenous bases.
Explanation:
sample answer
Refers to the Mediterranean world, centered around the Mediterranean and Black Sea
O Judeo-Christian
O Greco-Roman
Answer:
Greco-Roman world
Explanation:
The Mediterranean world which comprises of areas around the land regions of the Mediterranean and Black Sea Basins were influenced in various forms such as culture, language and the style of government by the Greeks and Romans.
These people were majorly involved in the civilization of the Mediterranean region. This makes the Mediterranean world to also be called the Greco-Roman world.
why are apples that have been boiled after they are peeled, do not change colour to brown?
Answer:
See the explanation below.
Explanation:
A freshly cut apple eventually turns brown after being exposed to air because its cells contain an enzyme called polyphenol oxidase. When this comes in contact with oxygen present in the environment, it turns the phenolic compounds present in the apple tissues into brown-colored products, imparting a brownish tinge to the freshly cut apple.
In fact, coating an apple with lemon juice not only affects its oxygen supply, but also impacts the function of enzymes. Lemon juice brings down the pH of the environment of the apple, thereby attacking the efficiency of PPO (Polyphenol Oxidase).
A surefire way to stop apples from turning brown is to apply heat to them, either by cooking or briefly blanching them in water.
Which amino acid chain will be formed by the codons shown below?
AAG AGA UGU
Messenger
Second base in codon
RNA Codons U
C
G
UUU
Phe
JUCU UAU
UUC
JUGU
UCC UAC TYT
UGC Су.
с
UUA
UUG
UAG StolUGG TPG
CUU
CCU CAU CGU
CUC
ССС CAC
His
CGC
Lou Pro
CUA CCA
Ical
CGA
Ang
CUG
Gin
CCG
CAG CGG
AUU ACU TAAU AGU
As
AUCH ACC
Ser
AGC
AAC
А
Thr
AUA IACA IAAA
IMA Lys
AGA
AUGACG
Ang
AAG
AGO
GUU IGCUS TGAU GGU
GUC GCC GAC
Asp
GGC
G
Val Ala
Gy
GUA GCA GAA GGA
GUG
IGCG
Glu
GGG
OGAN
С
Third base in codon
GAG
O A. Asn-Ser-Cys
O B. Lys-Ser-Cys
10
O C. Asn-Arg-Cys
O D. Lys-Arg-Cys
Answer:
the answer is d. lys-arg-cys
1. View the cartoon below. Describe how this cartoon illustrates interphase.
During interphase the cells copies it’s DNA. In the pictures it shows a chromatid duplicating into a sister chromatids.
What do you mean by interphase of cell cycle?The interphase is the period when the cell is in a non-dividing state and this can be in different stages: the first gap (G1) between the last mitosis and the S phase (phase of DNA synthesis) and the second gap (G2) between the completion of the S phase and the next mitosis (M).
Moreover, interphase is the portion of the cell cycle that is not accompanied by visible changes under the microscope, and includes the G1, S and G2 phases. During interphase, the cell grows, replicates its DNA and prepares for mitosis.
A cell spends most of its time in what is called interphase, and during this time it grows, replicates its chromosomes, and prepares for cell division. The cell then leaves interphase, undergoes mitosis, and completes its division.
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What personal qualities and experiences do you think helped Mendel in his
work?
Answer:
Gregor Mendel belonged to a family of farmers but he went to pursue academic studies. all these things combined with his curiosity resulted in his research studies.
Explanation:
An Austrian monk by profession, Gregor Mendel through experimental studies in his garden, discovered the basic principles of heredity. Mendel 's observations have become the basis of modern genetics and the study of heredity, and he is universally recognized as a foundation for the development of genetics. His strong will led him away from his family occupation of farming. More working in a church it was no less than a revolutionary step to choose science above faith, especially at that time.
Draw a cartoon strip or write an article to summarise the greenhouse effect and how it can lead to global warming. Include the following: 1. Role of the atmosphere (greenhouse gases) in maintaining the temperature on Earth, 2. Carbon cycle between plants, animals and the atmosphere, 3. Humans burn fossil fuels, run cars and generate electricity upsetting the balance, 4. Increased amount of carbon dioxide in the atmosphere leads to increased global temperature, 5. Effects of global warming.
The greenhouse effect is an essential phenomenon for life on earth. However, human activities such as pollution and burning of fossil fuels have caused an intensification of this effect, which has harmed the atmosphere and is directly related to global warming.
The greenhouse effect is formed by a layer of atmospheric gases that settle around the planet and allows a temperature suitable for life to reach the earth's surface. Therefore, we can guarantee that this effect is essential for our survival. It is necessary that the amount of these gases is kept in equilibrium for this temperature to be constant.
However, the burning of fossil fuels, industrial activities, pollution (caused by vehicles, aerosols, fires, among others), the use of non-renewable energy releases greenhouse gases into the atmosphere daily and in large quantities.
This causes the layer of greenhouse gases that circulates the earth to become more and more expanded, not being able to disperse solar radiation easily and causing an increasing temperature. All that heat is retained in the atmosphere, thus generating global warming, which allows the planet's temperature and ocean water to increase dramatically, which can cause various harmful effects to life on the planet.
For this reason, it is necessary to carry out public policies that reduce pollution and encourage the use of clean and renewable energy that does not increase the layer of greenhouse cases, promoting well-being and life on earth.
Which statement about solar prominences is true? Select one: a. They can reach thousands of kilometers into the sun’s atmosphere b. They are never visible, even during a total solar eclipse. c. They last at most for a few minutes. d. All of the these.
Answer:
d. All of the these.
Explanation:
Hope it helps.
Which part of the brain is responsible for coordination and balance?
Spinal cord
1
Cerebrum
2
Cerebellum
3
Brainstem
4
Answer:
The answer is cerebellum.
Explanation:
As the function of cerebellum are,
To maintain equlibrium and control the posture of a body.It makes body movements smooth , steady and co- ordinated.It also coordinate and regulates the contraction of skeletal muscles.Hope it helps...
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What is hypothesized about extinction?
A) All extinctions have been mass extinctions
B) Background extinctions are a normal part of stable ecosystems
C) The current extinction rate is estimated to be twice the normal rate
D) In the future, less extinction will occur near the equator than elsewhere
Answer:
Hey there!
The correct answer would be B. Background extinctions are a normal part of stable ecosystems.
Hope this helps :)
can diseases be transmitted by intermediate hosts? I need an answer quickly
Answer:
yes
Explanation:
like in malaria the parasite plasmodium inhabits the salivary glands of the mosquito though it does not affect it before being transmitted to us by a bite where now we catch malaria
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Science
7. Fill in the blanks with the word from
the plant pot below
Plants can only grow
under certain
The question is incomplete the correct question is attached in the form of the image:
Answer:
Plants can only grow under certain conditions.1. condition. They need 2. Water, air, light, and warmth. If a 3. plant does not have these things will slowly die. A 4. healthy plant has green leaves and stands up strong. A plant that has been deprived of 5. light will lose its leaves. A plant that has been deprived of 6. nutrients will turn yellow, thin and, 7. spindly. To stay healthy a plant needs to take water and nutrients from the 8. soil. Plants take 9. carbon 10. dioxide from the air and use it with water and 11. light to make ts food.
Plants can only grow under certain conditions, which include:
waterairlightwarmthWhat are environmental conditions?Environmental conditions can be defined as different circumstances in which an organism can survive and reproduce.
Organisms are adapted to survive to different environmental conditions (e.g. temperature conditions).An organism that can live in a wide range of environmental conditions is a eurytopic organism.In conclusion, plants can only grow under certain conditions.
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What in the body is locked up in water which is 70% of the body. Please help!!!
Answer:
70% brain and about 60% of our body is water
A mother has blood type A and her son has blood type o. Which blood types are possible for the father?
A.) O
B.) AB
C.) B
D.) А
Answer:
A, B, O
Explanation:
Hope this helped, brainly bot keeps on deleting my answer for the article I read this on.
8. What base in DNA pairs with adenine?
A cytosine
Buracil
C thymine
D guanine
Answer:
C. thymine
Explanation:
Adenine pairs with thymine in DNA and pairs with uracil in RNA.
Hope it helps.
Which of the following best describes the behavior of nonconservative elements in seawater?
A. Nonconservative elements are reactive in seawater and have a long residence time.
B. Nonconservative elements are reactive in seawater and have a short residence time.
C. Nonconservative elements are non-reactive in seawater and have a short residence time.
D. Nonconservative elements are non-reactive in seawater and have a long residence time.
Answer: Option C.
Nonconservative elements are non-reactive in seawater and have a short residence time.
Explanation:
Non conservative elements are elements that enter the sea water and have little concentrations in the ocean and show spartial variationns. These elements have short residence time I .e short replacement time and they are non reactive .Constituents such as phosphate, nitrate, and other nutrients, and dissolved oxygen, carbon dioxide, etc. are non-conservative because their concentrations are later changed by chemical reaction in the sea.
is Primary Hyperaldosteronism cancer?
Primary aldosteronism is a group of disorders, originally described by JW Conn, in which there is a non-suppressible secretion of aldosterone and hypertension. Aldosterone is a salt-retaining hormone synthesized by the adrenal gland that is regulated by multiple factors, with the renin-angiotensin system and serum potassium being the major factors. Additional minor regulators include adrenocorticotropic hormone (ACTH), atrial natriuretic factor, and dopamine
Primary hyperaldosteronism can be caused by either hyperactivity in one adrenal gland (unilateral disease) or both (bilateral disease). Unilateral disease is usually caused by an aldosterone producing adenoma (benign tumor) and less commonly by adrenal cancer or hyperplasia (when the whole gland is hyperactive). Bilateral disease is usually caused by bilateral hyperplasia (when both glands are hyperactive). There are rare genetic syndromes like familial hyperaldosteronism type I and II which may cause both glands to be hyperactive.
In some symbiotic relationships,
one organism may benefit. What
happens to the other organism?
A. The other organism benefits as well.
B. The organism is either helped or harmed.
C. The organism is harmed, then does harm to
the other organism.
meanings for A.carbohydrates B.fibres C. balanced D. diet E. proteins F. fat G.constipation
Answer:
Carbohydrates- these are food stuffs with sugar and fibers that provide energy to the body.
Fibres- these are things obtained from plants or animals.
Explanation:
what kind of diagonosis is neuroblastoma?
Answer:
Neuroblastoma is a cancer that develops from immature nerve cells.
Explanation:
Neuroblastoma often spreads to the bone marrow (the soft inner parts of certain bones)
hope this helps
Answer:
Neuroblastoma often spreads to the bone marrow (the soft inner parts of certain bones). If blood or urine levels of catecholamines are increased,
Explanation:
then finding cancer cells in a bone marrow sample is enough to diagnose neuroblastoma (without getting a biopsy of the main tumor
I need help ASAP... Any kind soul please help me
1. The alveoli are adapted to make gas exchange in lungs happen easily and efficiently.
2. They have moist, thin walls (just one cell thick) they have a lot of tiny blood vessels called capillaries.
An organisms physical appearance is its
1. Genotype
2. Phenotype
3. Codominance
4. Heterozygous
Answer:
The answer is 2. Phenotype
Answer:
phenotype
Explanation:
phenotype is the physical properties of an organism
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