Science answer check

1 of 4 Items
Item 1
Which statement is correct about a bottleneck event? (1 point)

A bottleneck event decreases the population of a species permanently.

A bottleneck event increases the population of a species permanently.

A bottleneck event decreases the gene pool of a population. **********

A bottleneck event increases the gene pool of a population.

2. Why are the gene pools of small populations reduced compared to those of larger populations? (1 point)

bottleneck events

lack of suitable mates

lack of advantageous traits

inbreeding*******^

3. A bottleneck event reduces the population of bears in one area by 80%. Which of these statements is correct? (1 point)

Disadvantageous traits are less likely be passed on.

Disadvantageous traits are more likely be passed on.**********

The gene pool of the bears has temporarily decreased.

The gene pool of the bears has temporarily increased.

4. There are three major species of reptile on an island. Species A has a population of 400 individuals and a low level of genetic variation. Species B has a population of 300 individuals and a medium level of genetic variation. Species C has a population of 150 individuals and a high level of genetic variation. Select the correct order of survival probability from least to greatest for these populations.(1 point)

Species B, species C, species A

Species A, species B, species C *********

Species C, species A, species B

Species A, species C, species B

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  1. 1. C - A bottleneck event decreases the gene pool of a population.
    2. D - inbreeding
    3. A - Disadvantageous traits are more likely be passed on.
    4. C - Species A, species C, species B

    For 7th Grade - Traits, Survival, and Reproduction Quick Check.
    @Mary, two of your answers are wrong, I would think you know that considering this question was asked 10 hours ago. I am posting these answers to help other kids with their homework. I suggest using my answers for checking your answers, and not cheating. I don't suggest cheating, but if you really need to, to perhaps get your grade up, well.. I can't control you, but do it if you must. Don't get caught though. Good luck!

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  2. @Helper thank you so much for these answers. I only used them to check my answers and thankfully they were correct. I would recommend listening to Helper.

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  3. 100% thanks @Helper

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  4. 1.C
    2.D
    3.B
    4.C
    good luk

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