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Elena L [17]
3 years ago
9

Why is genetic variation within a population essential for evolution?

Biology
1 answer:
klasskru [66]3 years ago
8 0

Genetic variation is essential for natural selection because natural selection can only increase or decrease frequency of alleles that already exist in the population. Genetic variation is caused by: mutation. random mating between organisms.
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What helps an animal to look like another animal to stay protected from predators? *<br> (0/1 Point)
VMariaS [17]

Answer: ADAPTIVE COLORATION

Explanation:

Colour and colour patterns play an important role in adaptations of animals. Such adaptive coloration is due to the presence of pigments in cells called CHROMATOPHORES. These cells are involved in coloration and color change which helps an animal to look like another animal to stay protected from predators.

Adaptive coloration may be grouped into :

--> WARNING COLORATION: some animals display bright colours and patterns that announce their presence rather than conceal it. Example is the yellow and black stripes of yellojackets and other wasps which have very painful stings.

--> MIMICRY: colours and patterns are used extensively by mimics. For example, the foul-tasting Actaea butterfly and the poisonous African monarch are mullerian mimics. They resemble each other closely because they have similar colouring and patterns on their bodies.

--> CONCEALING COLORATION: This is used in camouflage. It helps an animal to remain unnoticed by the predator. Certain animals change the colour of their body surfaces to match their environment and so escape detection.

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3 years ago
in a plant algae, fungi, and most bacteria cells, there is a rigid layer that surrounds the cell membrane and gives protection,
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It is called the cell wall. It provides rigidity to the cell.
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3 years ago
1 Define magnification and resolution in the use of a microscope.
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If a person with o blood type produces offspring with a person with b blood type, then what percentage of their offspring will b
Marysya12 [62]

Answer:

In humans, blood group is determined by three alleles I^{A}, I^{B}, and i.

I^{A} and I^{B} are co-dominant whereas i is recessive to other two.

Thus, if a person with blood group O produces offspring with blood group B then the other parent must contain I^{B} allele.

The genotype of other person can be I^{A}I^{B}, I^{B}I^{B}, or I^{B}i.

There is only one condition in which the person can have offspring with blood group O that is, when the other parent is I^{B}i.

In this condition, the probability of an offspring to have blood group O is 50%.

In other conditions, the probability of an offspring to have blood O is 0%.

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Features of a living thing,are called
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All living things are composed of cells. Some organisms, such as algae, are composed of a single cell (called unicellular organisms), while others, such as animals, are composed of many (called multicellular organisms). All living things grow and develop. ... Lastly, living organisms respond to their environment.
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3 years ago
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