How does evolution occur? The genetic makeup of a population changes of generati
ID: 282614 • Letter: H
Question
How does evolution occur?
The genetic makeup of a population changes of generations of time.
The genetic makeup of a population changes seasonally.
The genetic makeup of an individual changes in response to the environment.
4. All of these are true.
Which is the best example of gene flow:
Blue frogs getting eaten by snakes.
Red flowers becoming more common than yellow flowers.
A fish feeding in two different parts of a lake.
Young birds flying to a flock 500 miles away to reproduce.
5. Microbes mutate under radioactive contamination.
About how many earths would it take to support all people living at the same average level of consumption as the average American level of consumption?
less than 1
1- 2
3-10
11-16
more than 16
1.The genetic makeup of a population changes of generations of time.
2.The genetic makeup of a population changes seasonally.
3.The genetic makeup of an individual changes in response to the environment.
4. All of these are true.
Which is the best example of gene flow:
1.Blue frogs getting eaten by snakes.
2.Red flowers becoming more common than yellow flowers.
3.A fish feeding in two different parts of a lake.
4.Young birds flying to a flock 500 miles away to reproduce.
5. Microbes mutate under radioactive contamination.
About how many earths would it take to support all people living at the same average level of consumption as the average American level of consumption?
1.less than 1
2.1- 2
3.3-10
4.11-16
5.more than 16
Explanation / Answer
How does evolution occur?
The evolution occurs due to natural selection, random genetic drift, mutation, population mating structure, and culture.The evolution occurs due to change in genetic composition of a population over successive generations, which may be caused by natural selection, inbreeding, hybridization, or mutation.
Therefore, the answer is 4. All of these are true
Which is the best example of gene flow:
Gene flow refers to the movement of genes or alleles between interbreeding populations of a particular species or it is the movement and exchange of genes or alleles from one population of species to another.
Therefore, option 4 is correct, Young birds flying to a flock 500 miles away to reproduce.
About how many earths would it take to support all people living at the same average level of consumption as the average American level of consumption?
The average American, says GFN (Global Footprint Network ), uses seven global hectares, compared to a global average of 2.7, according to the most recent GFN figures (based on data from 2011). It's this figure of seven global hectares that allows Wackernagel and his colleagues to calculate that it would take four Earths - or to be precise, 3.9 Earths - to sustain a population of seven billion at American levels of consumption.
Therefore, option 3 is correct, 3-10
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