Answer:
Through the process of crossing-over
Explanation:
During prophase 1 of meiosis, each chromosome carefully pairs with its homologous chromosome. Homologous chromosomes aline together to make the crossing-over possible, the stage where they interchange their parts.
Crossing-over occurs between two homologous chromosomes in the equatorial plane, making the daughter cells genetically different from the original one.
The point where two chromatids interchange their genetic information is the chiasma, where new genetic material or information is produced to be inherited by descendants. Chiasma allows the crossing-over between two homologous chromatids, one of each parent.
The Crossing-over frequency between two genes depends on the distance between them. A short distance between genes is a small target for crossing-over to occur, which means that only a few of them will happen, compared with the number of events between genes that are more separated from each other.
In the exposed example, the chiasma must be placed between A and B genes.
Before crossing-over
homologous chromosome 1 --------A------*-----B---------homologous chromosome 2 --------a------*------b--------The symbol * represents the area where the chiasma places and crossing-over occurs.
After csossing-over
chromosome 1 --------A------*-----b--------chromosome 2 --------a------*-----B--------A new variety of rose is produced when a gardener crosses two different kinds of roses. The new rose has some traits of each of the other two kinds.This is an example of:
Answer: selective breeding
Explanation:
How do hormonal contraceptives (usually) work? Check all that apply.
freating a barrier
so that the sperm
cell do not enter
the uterus
inhibiting the
sperms' ability to
"swim"
thicken the
cervical mucus
reducing the inner
lining of the
uterue; egg cell
cannot attach
preventing the
maturing of the
follicle cells in the
ovaries
Select all
that apply
SUBMIT -
Musio
12
W2021
BAHO LORUS
Answer:yes and no there is no context just yes
Explanation:
Plz do 3,2❤️ Plzzzzz urgent
Answer:
2)A Dutch father-son team named Hans and Zacharias Janssen invented the first so-called compound microscope in the late 16th century when they discovered that, if they put a lens at the top and bottom of a tube and looked through it, objects on the other end became magnified.
3)While observing cork through his microscope, Hooke saw tiny boxlike cavities, which he illustrated and described as cells. He had discovered plant cells! Hooke's discovery led to the understanding of cells as the smallest units of life—the foundation of cell theory.
The food components gradually gets digested as food travels through the various components of alimentary canal. The digested food can pass into the blood vessels in the walls of the small intestine. The digestive system consists ofSingle choice.
(a) Digestive tract
(b) Digestive tract and liver
(c)Digestive tract and pancreas
(d) Digestive tract and the associated glands
pls answer
Answer:
(b) Digestive tract and liver
Explanation:
The digestive system consists of the digestive tract and liver. The digestive tract is made up of a large number of parts. These parts include the esophagus, stomach, intestines, rectum, etc. Food enters the mouth and travels down the digestive tract and out passing the rectum. The liver is where the blood passes through and it is responsible for many functions such as the metabolizing of fats and proteins, separating and storing vitamins and minerals, regulating different chemicals found in the blood, etc.
Choose the statement about renewable and nonrenewable energy sources that is NOT true.
a. Renewable energy creates little or no waste and has few negative environmental impacts.
b. There has been little to no recent growth in renewable energy use due to a lack of environmental concerns with the use of fossil fuels.
c. Most nonrenewable energy sources can be renewed, but it takes thousands to millions of years for them to form.
d. New technologies promise future increases in the use of renewable energy sources.
Answer:
b. There has been little to no recent growth in renewable energy use due to a lack of environmental concerns with the use of fossil fuels.
Explanation:
Fossil fuels have had tremendous negative impacts on the environment and humans as well. For that reason, the use of renewable sources of energy, such as hydropower and biomass, have become increasingly popular over the last few decades.
Within our lives, or possibly within many, many lifetimes, the sources of non-renewable energy will run out or cease to exist. The three main fossil fuels that are used as non-renewable energy sources are coal, oil, and natural gas. Carbon is the main element in fossil fuels. Thus, option B is correct.
What best define about nonrenewable energy sources?Fossil fuels have had a terrible impact on both the environment and people. Because of this, the usage of renewable energy sources, such as biomass and hydropower, has risen in popularity over the past few decades.
A natural resource is classified as non-renewable (also known as finite) if it cannot be easily replenished by natural processes at a rate fast enough to keep up with use. Carbon-based fossil fuels are one illustration. The original biological substance can change into a fuel like gas or oil thanks to heat and pressure.
Therefore, There has been little to no recent growth in renewable energy use due to a lack of environmental concerns with the use of fossil fuels.
Learn more about nonrenewable energy here:
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The changes observed in aging are in part caused by
Shortening of the telomeres
DNA replication
Mitosis
Meiosis
EASY POINTS!!! HELP ME WITH THIS HOMEWORK PLEASE!!! FIRST TO ANSWER GETS BRAINLEST!!!
1. Which of the following applies to a viral infection?
A.Viral infections Viruses can be treated with antibiotics.
B.Viruses can only replicate with in a cell or living tissue
C.Viruses are larger than bacteria.
D.Viruses are made of cells.
2. Fill in the blank
_____inject DNA or RNA into the nucleus of a cell to reproduce.
It is often argued that viruses are not living. Why?
A. Viruses reproduce.
B. Viruses are not made of cells.
C. Viruses contain genetic material.
D. Viruses are made of RNA or DNA.
3. Viruses are not living because
A. They are made of cells
B. They cannot synthesize DNA or RNA
C. They cannot reproduce on their own
D. They do not contain a cell membrane
4. Viruses are different from bacteria in that
A. they can remain dormant on non-living surfaces
B. they can be found just about anywhere
C. they can infect just about every form of life
5. Which of the following?
Viral infections _____.
A. can be treated with antibiotics
B. often can't be treated
C. can be prevented with immunization
D. can be contracted only from direct contact with someone infected
6. Edward Jenner discovered a vaccination against ______ by infecting a boy with _____.
A. measles; smallpox
B. cowpox; smallpox
C. polio; cowpox
D. smallpox; cowpox
7. How does the flu vaccination work?
A. The flu vaccine works by making you sick with the flu so that you won’t get the flu later.
B. The flu vaccine is a dose of antibodies that fight the flu virus.
C. The flu vaccine is injected under the skin in an inactive form and the immune system responds with antibodies to the flu protecting you from future exposure to the flu.
D. The flu vaccine is injected under the skin and the endocrine system responds by sending hormones to fight the virus.
8. Artificially stimulating antibodies to a disease is a(an)_____.
A. immunization
B. vaccination
C. variolation
D. virus
9. At what ages do health official recommend following an immunization schedule?
A. over 65 years
B. 8-18 years
C. birth - 18 years
D.birth - 75 years
Which of the following:
10. A virus is
A. A free living cell
B. Always parasitic
C. Contains DNA or RNA
D. Cannot reproduce on their own
Answer:
1. B.Viruses can only replicate with in a cell or living tissue
2. B. Viruses are not made of cells.
3. C. They cannot reproduce on their own
4. C. they can infect just about every form of life
5. B. often can't be treated
6. D. smallpox; cowpox
7. C. The flu vaccine is injected under the skin in an inactive form and the immune system responds with antibodies to the flu protecting you from future exposure to the flu.
8. A. immunization
9. C. birth - 18 years
10. B. Always parasitic
Hope this helps
Answer:
1. B.Viruses can only replicate with in a cell or living tissue
2. B. Viruses are not made of cells.
3. C. They cannot reproduce on their own
4. C. they can infect just about every form of life
5. B. often can't be treated
6. D. smallpox; cowpox
7. C. The flu vaccine is injected under the skin in an inactive form and the immune system responds with antibodies to the flu protecting you from future exposure to the flu.
8. A. immunization
9. C. birth - 18 years
10. B. Always parasitic
Hope this helps
Explanation:
For Labrador retrievers, black fur is dominant to yellow. a) Explain how two black dogs can have different genotypes. b) Could a black dog have the same genotype as a yellow dog
Answer:
Please find the answers explained below
Explanation:
A) This question involves a Gene coding for fur color in Labrador retrievers (a dog). The allele for black fur (B) is dominant over the alllele for yellow fur (b). Based on the law of dominance by Gregor Mendel, the dominant allele will always mask the phenotypic expression of the recessive allele in a heterozygous state. The two fur colors have different alleles, however, when they come together to form a heterozygote, the black fur is still expressed. Naturally, a black furred Labrador retriever should have the genotype; BB but since the black fur is a dominant trait, another heterozygous genotype will arise as Bb.
B) No, the black dog cannot have the same genotype as yellow dog. This is because the black dog must always have at least one dominant allele (B) in order to be black while the yellow dog, due to the recessiveness of the yellow allele can only have the genotype; bb. Hence, a black dog can either be Bb or BB but a yellow dog can only be bb.
Explain how an HAB outbreak can have a devastating economic
impact
Which major environmental factors can affect health?
genetics and obesity
poor water quality and obesity
poor air and water quality
genetics and poor air quality
!!!!???
HELPPPPPPPP
Answer:
Poor air and water quality.
Explanation:
Genetics are not environmental factors, and neither is obesity. However, poor air and water quality can lead directly to severe health impact.
When a bat is hibernating, how fast does its heart pump?
Answer:
20 beats per minute
Explanation:
Answer:20 beats
Explanation:bat's heart rate slows to only 20 heartbeats per minute.
Explain the role of PERISTALSIS during your food’s time in the esophagus as it travels to the stomach.
Peristalsis helps in storing food, breaking down food down and mixing it with juices secreted by stomach lining. Peristalsis in stomach helps in partial digestion of food called chyme.
how do oomycetes feed
Construct an explanation to predict the type of symbiotic relationship that exists between the hippo and oxpecker birds?
please help ill give brainliest :)) At the equator, the earth spins a distance of 26,120 miles every day. At what speed does the Earth spin in mph?
Answer:
1088 mph
Explanation:
26120/24 = 1088.333 ≈ 1088
Answer:
1088.333mph
Explanation:
26,120miles ÷ 24hours = 1088.333mph
Structure X was made
a. 1 point
b. in the nucleus
c. by a ribosome
d. of anticodons
e. all of the above
The NMDA receptor is a __ receptor that when it binds its neurotransmitter allows ___ entry into the cell, which can promote changes at the synapse that aid in learning and memory but can cause postsynaptic cell death if the receptor is activated for a prolonged time period.
Answer:
The NMDA receptor is a ionotropic receptor that when it binds its neurotransmitter allows calcium entry into the cell, which can promote changes at the synapse that aid in learning and memory but can cause postsynaptic cell death if the receptor is activated for a prolonged time period.
Explanation:
NMDA receptors is an ionotropic glutamate receptor, which has functions in neuroplasticity, but also in excitotoxicity. The receptors are activated by a power differential, when Magnesium ions (Mg2 +) come into contact. This step allows the sodium (Na +), calcium (Ca2 +) ions (these in less quantity) and potassium (K +) ions to flow. The flow of calcium ions, specifically, is essential to enhance the processes of synaptic plasticity or brain plasticity. NMDA receptors play an important role in the development of pain, particularly neuropathic pain.
Why is human height a polygenic trait?
Because the alleles for human height are codominant.
Because there are several alleles for the gene that controls human height.
Because the gene that controls human height is pleiotropic.
Because many genes control human height.
Answer:
D
Explanation:
The answer is D
BRAINILIEST PLEASEAnswer:
Yes, the answer is D
Explanation:
can someone help me please
Answer:
sorry I can't your picture is blurry ☹️
During a(n) _____________________, the sun can produce excessive radiation to heat the lower atmosphere and Earth's surface.
Group of answer choices
could it be a solar flare?
A 10 N force and a 15 N force are acting on a box in opposite directions what edition force must be added to produce equilibrium
Answer:
5N of force acting the same way as the 10N of force to make it 15N of force
Explanation:
Snake venom contains a mixture of enzymes, which include phospholipase that break down cell membranes, proteinases that destroy proteins, as well as amino acid oxidases and nucleotidases that break down the monomers for protein and DNA synthesis, which is why they can be so deadly. If you were bitten by a venomous snake you may be treated with an antivenom. In addition to antibodies that help your immune system recognize and fight the foreign molecules, what else does the antivenom most likely contain
Answer:
The correct answer is - Venom enzyme inhibitors.
Explanation:
The snake venoms are the complex mixtures of phospholipase A2s, disintegrins, serine proteases, C-lectins, and metalloproteases, and others. The snake venom phospholipase A2s (svPLA2s) enzymes found in most of the families of venomous snakes that cause anticoagulant effects, cardiotoxicity, neurotoxicity, and cytotoxicity, and other effects.
In antivenom, there are Venom enzyme inhibitors other than antibodies that help in neutralizing these enzymes by weakening or inhibiting these toxic actions.
Answer this question please
Answer:
Any animal that is not a equine, tapir, or rhino.
Explanation:
There are 3 extant families of odd toed ungulates:
Equidae (horses, donkeys, zebras etc)Rhinocerotidae (rhinoceroses) Tapiridae (tapirs).If the animal isn't in one of those families, it isn't an odd toed ungulate.
Your destiny is in your own hands. Life is what you make out of it. Do you agree? Write five points in support of your view.
Answer:
yes I agree because your life is destined by fate and time and life is a very valuable and prestigious thing to waste so u must make the best out of your life
Eubacteria and archaebacteria differ in the process of protein synthesis. What is the difference?
A.) phenylalanine is added as the first amino acid during protein synthesis
B.) Methionine is added as the first amino acid during protein synthesis
C.) Formyl-methionine is added as the first amino acid during protein synthesis
D.) Glutamic acid is added as the first amino acid during protein synthesis
Answer:
A
Explanation:
The main difference between Archaebacteria and Eubacteria is? Hint: Archaebacteria are called ancient bacteria whereas eubacteria are called true bacteria. Unlike eubacteria, archaebacteria can survive in extreme conditions
The table shows the number of cells at each stage of the cell cycle in a root tip meristem. One complete cell cycle takes 24 hours. The number of cells at each stage is proportional to the time spent at that stage. What is the length of time spent in metaphase?
a. 60.0 min
b. 86.4 min
c. 120.0 min
d. 178.8 min
Answer:
im completing a challenge
Explanation:
g when hydrogen is present and the citric acid cycle is active, the ph of the mitochondrial matrix is
Answer:
The pH remains constant
Explanation:
The pH value of Mitochondrial matrix = 7.8 while the pH of the intermembrane space of the mitochondria = 7.0–7.4
The presence of the hydrogen atoms makes the mitochondrial matrix acidic and hence reduced the pH value but the pH of inner and outer matrix is maintained equal to each other thus as the H+ ion increases, the base concentration increases thereby pushing H+ to the inter membrane space and hence producing ATP.
Provide an argument in favor of the importance for farmers or animal production specialists to understand animal
physiology
Answer:
Its important to understand animal physiology if farmers and animal production specialists wish to meet projected demand for animal products.
Explanation:
They must streamline production and advance capacity to prevent, detect, diagnose, and treat animal diseases. The health and quality of livestock is influenced by genetics, care, nutrition, and environment. The quality of animal products is also affected by production methods and marketing practices.
Information found in link below:
https://nifa.usda.gov/topic/animal-production
Identifying Star Systems:
Which type of star system is pictured?
✔ open cluster
Answer:
hope it helps
Explanation:
geqgrqgtsnydms v FyhgvCgxvnhh nghllkk wa
Answer:
open cluster
Explanation:
Just try it.
You'll see.
Which kind of evidence is used by scientists to understand the intermediate states between an ancestral form and that of its
descendants?
A) causation
B) correlation
C) natural selection
D) transitional fossils
The intermediate states between an ancestral form and that of its
descendants are transitional fossils.
What is a transitional fossil?
Transitional fossils are remains of an organism that came in between a known version of a species and the current species.
Transitional fossils would be proof of evolution because they would show medium forms of a species and they altered and accumulated adaptations at a slow pace.
Thus, option "D" transitional fossils are correct.
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