Answer:
Explanation:
Oxygen is needed to support life and some metabolic processes in microorganisms especially aerobic organism.
The presence of oxygen in the container gives them the opportunity to carry out there metabolic activities thereby enhancing there growth and multiplication.
Hence, to limit the growth of aerobic bacteria or fungi, and also to prevent the evaporation of volatile components that is available in the content oxygen is withdrawn this help extend the shelf life of the produce to be stored.
Which best describes bio geographic isolation?
A- it always leads to the formation of new species
B- it cannot lead to evolution
C- it is a mechanism for evolution
D- it occurs only through geographical forces
Answer:
b
Explanation:
Answer:
D
Explanation:
Because it doesn't always lead to new species, it can still lead to evolution, it isn't necessarily a mechanism for evolution though.
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??
The modern model of the Plate Tectonic Theory suggests that the continents and the
major tectonic plates drift slowly on ?
Answer:
pretty sure it’s the lithosphere
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.
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
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:
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
proteins are made at the ?blank
Answer:
below
Explanation: Ribosomes cell
_______ are chemical messengers that are produced in one body region but affect a different body region
Hormones
Enzymes
Neurotransmitters
Nucleic acids
Answer:
Hormones
Explanation:
what are ionic bonds?
AQUATICS SCIENCE I need help please
Answer:
a spring
Explanation:
it is the source of the river
Answer: A spring.
Explanation:
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:
free bobux man ccccccccccccummmmmm
Answer: ummmmm dont know what that means but freeeeee pointssss
Explanation:
Answer:
thanks. have a beautiful life.
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.
Which of the following undergo meiosis?
A Liver cells
B. Sperm cells
C. Unicellular organisms
D. All of the above
rion
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.
Learn more about Meiosis, here:
https://brainly.com/question/29383386
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scientists have discovered several species of insect that all contain the same DNA sequence on their second chromosome. What does this evidence suggest?
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.
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:
each step of the pyramid is called a
Answer:
on the food chain it's trophic levels
actual step pyramids are called ziggurats
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)
Meningitis may be transmitted from one person to another by:
water
sneeze
cough
soil
Answer:
cough!!!!
Explanation:
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.
Learn more about years here: https://brainly.com/question/8629556
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.
There are two types of joints. One is movable and the other is called what?
flexible
muscular
immovable
optional
Answer:
Knee
Explanation:
I thinko
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! :)
all you need is in the photo
ASAP
Answer:
D
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.
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.
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:
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