Answer:
Explanation:
Cell division is the process whereby a parent cell finish up into two daughter cells. they are two types of cell division
mitosismeiosismitosis is a process whereby a parent cell finish up and produces two daughter cells having the same number of chromosomes
stages of mitosis
Interphase: In this stage , nothing really happens in the cell, resting stage of the cellprophase: in this stage , the chromatins condenses into chromosomes, the nuclear membrane disappear and the spindle fibre radiates
metaphase: in this stage , the chromosomes align in the middle and meet at the equatoranaphase: the chromosomes split at the centromere and move to the opposite polestelophase: the cell splits, and the spindle fibre disappears cytokinesis: the cell produces two daughter cells_______ are chemical messengers that are produced in one body region but affect a different body region
Hormones
Enzymes
Neurotransmitters
Nucleic acids
Answer:
Hormones
Explanation:
Meningitis may be transmitted from one person to another by:
water
sneeze
cough
soil
Answer:
cough!!!!
Explanation:
Please help! Will pick brainist!
Manatees have toenails on their feet. The toenails are left over when the ancestors of manatees walked on land. They have no function today. Manatee toenails are examples of ...
A.comparative anatomy.
B.DNA.
C.fossil record
D.vestigial structures.
Answer:
vestigial structures
Explanation:
hope this helps
Which of the following undergo meiosis?
A Liver cells
B. Sperm cells
C. Unicellular organisms
D. All of the above
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таасан
Answer:
The sperm cells.
Explanation:
Liver cells, sperm cells and unicellular organisms all undergo meiosis. Therefore, the correct option is D.
A specific cell division known as meiosis occurs in sexually reproducing organisms. The cells produce gametes through this process, which are the specialized sex cells used in sexual reproduction. Despite not being directly involved in reproduction, liver cells can undergo meiosis. Under certain circumstances, meiosis in liver cells can be induced to form haploid cells.
Male gametes, or sperm cells, undergo meiosis as part of spermatogenesis. Haploid sperm cells with half the number of chromosomes than the parent cell are formed during meiosis in the testis. Depending on their reproductive strategies, unicellular organisms may also undergo meiosis to produce haploid cells that can mate with other haploid cells during sexual reproduction.
Therefore, the correct option is D.
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What must happen before meiosis can begin?
Answer:
The DNA is packed into chromosomes. The DNA replication is the same as mitosis. And after the DNA is replicated, the homologous will double, and now each chromosome now has a homologous pair
Explanation:
What are the effects of fishing on the reef ecosystem
Answer:
Coral reef fish are a significant food source for over a billion people worldwide. Many coastal and island communities depend on coral reef fisheries for their economic, social, and cultural benefits. But too much of a good thing can be bad for coral reefs. Download this infographic | Infographic Text
Coral reef ecosystems support important commercial, recreational, and subsistence fishery resources in the U.S and its territories. Fishing also plays a central social and cultural role in many island and coastal communities, where it is often a critical source of food and income.
The impacts from unsustainable fishing on coral reef areas can lead to the depletion of key reef species in many locations. Such losses often have a ripple effect, not just on the coral reef ecosystems themselves, but also on the local economies that depend on them. Additionally, certain types of fishing gear can inflict serious physical damage to coral reefs, seagrass beds, and other important marine habitats.
Coral reef fisheries, though often relatively small in scale, may have disproportionately large impacts on the ecosystem if conducted unsustainably. Rapid human population growth, increased demand, use of more efficient fishery technologies, and inadequate management and enforcement have led to the depletion of key reef species and habitat damage in many locations.
Which statements describe aspects of what causes wind to blow? Select two options.
Answer:
statements describe aspects of what causes wind to blow is Wind is caused by differences in air pressure. Explanation: Due to different rate of heating and cooling of air there is difference of the air pressure on the surface of the land.Apr 10, 2020
Answer:
The Correct Answer is A and C.
Explanation:
The wind is the movement of air, the movement of air is happened by the difference in pressure.
A difference in air pressure is what causes the wind to blow. Difference in pressure is happened by the uneven heating of the earth's surface.
The wind is normally moving air from a high air pressure place to a low air pressure place.
The greater the difference in air pressure the stronger the wind blow.
(this is for EDGE)
When the Australian wildfires occurred, what short-term effect did the
ecosystem experience?
A. Plants and/or animals relocated or died.
B. All of the plants died but the animal population increased.
C. There was no effect on the ecosystem.
D. The trees grew back quick and the animals were not affected
Answer:
A. Plants and/or animals relocated or died.
Explanation:
Plants and animals will eventually come back, so that is a short-term effect on the ecosystem.
Hope this helps! :)
scientists have discovered several species of insect that all contain the same DNA sequence on their second chromosome. What does this evidence suggest?
True or false: the only function your nose has is to smell
Answer:
false
Explanation:
it helps to breathe as well
Answer:
false.
Explanation:
I dont know I think its rigjt
In two sentences explain the difference between incomplete dominance and complete dominance.
Answer:
In complete dominance, only one allele in the genotype is seen in the phenotype. In codominance, both alleles in the genotype are seen in the phenotype. In incomplete dominance, a mixture of the alleles in the genotype is seen in the phenotype.
Explanation:
The purpose of isolation techniques is to:
Answer:
Isolation practices are designed to minimize the transmission of infection in the hospital, using current understanding of the way infections can transmit. Isolation should be done in a user friendly, well-accepted, inexpensive way that interferes as little as possible with patient care, minimizes patient discomfort, and avoids unnecessary use.
Explanation:
Who was the first to try vaccination (NOT VACCINE BUT THE SIMILAR METHOD)
Answer:
Traditional Indian and Chinese medicinal
systems sometimes deliberately rubbed the
skin crusts from smallpox victims into the
the skin of healthy people. They thus hoped to
induce a mild form of smallpox that would
create resistance against the disease.
Answer:
Traditional Indian and Chinese medicinal
systems??
Story #1
Once upon a time, there lived a population of mountain people whose members all had wings but different
types-either bat wings or bird wings. 40% of the population had bat wings and 60% of the population had bird
wings. One day, a storm hit that lasted for several weeks. Those with bat wings were able to fly around and
find food because their wings were water resistant, while those with bird wings were not able to get food
because their feathers were not water resistant and got soaked through. Many of the bird-winged people starved
and did not survive, so their alleles decreased in the gene pool, lowering the frequency of the bird wings in
future generations. Over many generations, the environment had more and more long periods of rain and the
genetic makeup of the population shifted to 10% with bird wings and 90% with bat wings.
What is the trait being described?
What are the variations that exist in this population?
3. How did the event lead to the change in allele frequency?
Alleles?
4. What type of evolutionary mechanism did this story show?
5. Was there an adaptation in this story? If so, identify it.
6. Did the change make the population more or less similar to other populations?
7. Would this increase or decrease reproductive isolation?
Increase or decrease speciation?
8. Did the new population change for the better, worse, or have no effect? Why?
Answer:
The trait being described is the ability to fly in rainy season.
Explanation:
The trait being described is the ability to fly in rainy season. The people with bat wings and people with bird wings are present in the population. The event lead to the change in allele frequency because the population of people with bird wings die due to starvation. Yes, the bat wings were adapted to that environment so they are able to survive. The change make the population less similar to other populations because population of people with bat wings increases as compared to other population. Yes, the new population change for the better of the ecosystem because the population is able to controls the population of other species in the ecosystem.
4. What best describes the role of mutations in evolution?
a. Mutations are not necessary for evolution because they are not herita
b. Mutations are useful for evolution to occur because they promote ger
uniformity within a population.
c. Mutations are essential for evolution to occur because they produce
variations within a population.
d. Mutations are essential for evolution to occur because they are respo
environmental changes.
Answer: option C.
Mutations are essential for evolution to occur because they produce variations within a population.
Explanation:
This is because Mutation refer to change in the genetic content or DNA composition of organisms. Therefore , for evolution to occur there must be Mutation because it is the main source of genetic variation or causes genetic variation needed for evolution.
Mutation is important as the basics of evolution because it produce a new DNA sequence for a gene function, which lead to the formation of new allele.
Explain why NON-RENEWABLE resources are NOT renewable even though plants and animals continue to die all the time.
Answer:
The correct answer is - these resources take million years to be replenished.
Explanation:
Non-renewable resources are the resources that come from a source that will finish ultimately or run out or can not be replenished in one or more human life cycles. These sources might take million years to replenish.
Most non-renewable resources are fossil fuels, coal, natural gas. Fossil fuels, cols are were formed as the remains of dead plants and animals but takes millions of years to decay, under huge amounts of pressure and heat.
There are two types of joints. One is movable and the other is called what?
flexible
muscular
immovable
optional
Answer:
Knee
Explanation:
I thinko
AQUATICS SCIENCE I need help please
Answer:
a spring
Explanation:
it is the source of the river
Answer: A spring.
Explanation:
how do scientists know living things are related to eachother? (there are two way)
Answer:
scientists can also analyze DNA to discover how closely organisms are related. Every living creature has DNA, which has a lot of inherited information about how the body builds itself. Scientists can compare the DNA of two organisms; the more similar the DNA, the more closely related the organisms.
A cell that is placed in distilled (plain) water will swell up because it fills
with water. Which process causes the cell to swell?
Answer:
If a cell is placed in a hypotonic solution, water will move into the cell. This causes the cell to swell, and it may even burst. A hypertonic solution means the environment outside of the cell has more dissolved material than inside of the cell. If a cell is placed in a hypertonic solution, water will leave the cell.
Explanation:
I hope this helps! ^^
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Yeast cells have 16 chromosomes and reproduce asexually. How many chromosomes would its diploid cell have?
Answer:
fourty six chromosomes
I think that 46 is the answer :)
what are ionic bonds?
each step of the pyramid is called a
Answer:
on the food chain it's trophic levels
actual step pyramids are called ziggurats
Which of the following statements about organisms and their ecosystems is true?
a. Organisms are adapted to the ecosystems in which they live.
b. The abiotic factors in an environment are determined only by the local organisms.
c. Similar organisms play different roles in different ecosystems.
d. All organisms will thrive in any ecosystem.
a) If Earth's history has lasted 4.6 billion years (4600 million years), and one calendar year has 365 days, how many years would be represented by one calendar day?
The number of years would be represented by one calendar day is to be considered as the 144 years.
Calculation of the number of years:Since
Earth's history has lasted 4.6 billion years (4600 million years), and one calendar year has 365 days
So here it should be like 144 years
hence, The number of years would be represented by one calendar day is to be considered as the 144 years.
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Which geological feature can be created by a divergent boundary?
A) mid-ocean ridge, rift valley
B) mountain chains
C) earthquakes
D) volcanos
Answer:
A. Mid ocean ridge
Explanation:
A divergent plate boundary often forms a mountain chain known as a ridge. This feature forms as magma escapes into the space between the spreading tectonic plates.
The mid-ocean ridge, rift valley is a geological feature can be created by a divergent boundary. Therefore option A is correct.
A divergent boundary is a type of tectonic plate boundary where two lithospheric plates move away from each other. This movement creates a gap or space between the plates, allowing magma from the asthenosphere (the partially molten layer of the Earth's mantle) to rise and fill the void.
As the magma reaches the surface, it cools and solidifies, forming new crust. This process occurs primarily in the oceanic lithosphere, resulting in the formation of mid-ocean ridges.
Mid-ocean ridges are underwater mountain ranges that run along the seafloor and span across the Earth's oceans.
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What is the name for the loose layer on top of soil created by fallen leaves and plant remains?
1. Topsoil
2. Loam
3. Litter
4. Humus
Topsoil layer
Sorry if I'm wrong
My test is timed, who ever answer this first will be Brainliest, How many genes for each trait does a child inherit?
Answer:
One allele for every gene in an organism is inherited from each of that organism's parents.
Explanation:
Answer:
These two copies of the gene contained in your chromosomes influence the way your cells work. The two alleles in a gene pair are inherited, one from each parent.
Explanation:
proteins are made at the ?blank
Answer:
below
Explanation: Ribosomes cell
how is lactobacillus acidophilus helpful
Answer:
its a a one of the many bacteria found inside of your intestines that produces lactic acid via fermentation of lactose (milk sugar)
Explanation: