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
For those who have different questions for 3 &4 here are all the answers:
1.Which statement is correct about a bottleneck event?
ANSWER: A bottleneck event decreases the gene pool of a population.
2. Why are the gene pools of small populations reduced compared to those of larger populations?
ANSWER: Inbreeding
3. A bottleneck event reduces the population of bears in one area by 80%. Which statement is correct about the bears’ gene pool?
ANSWER: It has temporarily decreased, so disadvantageous traits are more likely to be passed on.
4. Which information helps scientists determine the survival probability of a population?
ANSWER: the level of genetic variation in the population
this is 100% right
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!
1. A bottleneck event decreases the gene pool of a population.
2. inbreeding
3. It has temporarily decreased, so disadvantageous traits are more likely to be passed on.
4. the level of genetic variation in the population
Have an amazing day!