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katen-ka-za [31]
4 years ago
10

In a forest, a tree falls on a swamp and kills the worm population reducing the population by half. The remaining population is

characterized by a remarkable reduction in genetic diversity. Which mechanism of evolution is exhibited here?
Biology
1 answer:
Flauer [41]4 years ago
8 0
The answer is genetic drift (bottleneck effect)

<span>There are 4 basic mechanisms of evolution - mutation, genetic drift, natural selection, and gene flow (migration). Genetic drift is a change in the frequency of alleles in a population as a result of random sampling of organisms. One of the examples of genetic drift is the bottleneck event. </span>The bottleneck event means drastic reduction of the population size because of environment changes. The consequence of this is the reduction of genetic variation. This is what happened to the population of worms after tree falling.

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Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. Assume all
PolarNik [594]

Answer:

C) all chinchilla

Explanation:

As we know that dominance of alleles for the coat color in rabbits goes like this:

                                          C+ > Cch > Ch > C.

  • The allele for full colour or agouti is  designated as C+.
  • Allele for mutant coat color  silvery- gray coat-chinchilla is Cch.
  • Allele for “Himalayan” coat is called ‘Ch
  • Albino rabbits have whole white coat and allele for this is c

If we cross homozygous chinchilla with homozygous chinchilla the cross will look like this:

P1:                                            chinchilla x chinchilla

P1:                                             Cch Cch    X   Cch Cch

F1:                                          Cch Cch       :       Cch Cch

Since all offspring have Cch Cchgenotype that is foe chinchilla phenotype  it means that all the offspring will have chinchilla phenotype that makes option C correct.

Hope it help


3 0
3 years ago
The deflection of moving air and water that results from Earth's rotation is known as the a Southern Hemisphere Effect b Norther
zhannawk [14.2K]

Answer:

D.

Explanation:

an effect whereby a mass moving in a rotating system experiences a force (the Coriolis force ) acting perpendicular to the direction of motion and to the axis of rotation. On the earth, the effect tends to deflect moving objects to the right in the northern hemisphere and to the left in the southern and is important in the formation of cyclonic weather systems.

5 0
3 years ago
Which change absorbs heat?
trasher [3.6K]
A. Burning natural gas

A liquid changing to gas is called boiling or evaporation.A gas change into a solid is called deposition and a gas changing into a liquid is called condensation.half of these are endothermic, meaning they absorb heat from their surroundings.the others are exothermic,meaning they release heat. Hope this helps
7 0
4 years ago
How does an organism's niche differ from its habitat?
mars1129 [50]

Answer:

An organisms niche is it's role in the ecosystem. This includes what it eats and what it's eaten by, and is usually affected by it's habitat.

An organisms habitat is simply where the organism lives.

6 0
3 years ago
True or False: tides only affect the oceans, streams, lakes, and other bodies of water on Earth.
aliina [53]
I think False ..........................................
5 0
3 years ago
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