Which of the following species would have the greatest chance of going extinct?(1 point)

Question

Responses

a species with a fast reproduction rate and lots of genetic variation living in a stable environment
a species with a fast reproduction rate and lots of genetic variation living in a stable environment

a species with a slow reproduction rate and very little genetic variation living in a stable environment
a species with a slow reproduction rate and very little genetic variation living in a stable environment

a species with a slow reproduction rate and very little genetic variation living in a changing environment
a species with a slow reproduction rate and very little genetic variation living in a changing environment

a species with a fast reproduction rate and lots of genetic variation living in a changing environment

Question
Which of the following is believed to be common among all mass extinction events?(1 point)
Responses

the type of species that went extinct
the type of species that went extinct

the number of species that went extinct
the number of species that went extinct

a significant change in the global climate
a significant change in the global climate

the type of event that causes the extinction

Imagine two populations of penguins live in the same ecosystem. One population begins to exchange stones as a mating ritual while the other population begins to dance by shifting from one foot to the other. Individuals from each population will only mate with individuals that display the appropriate mating ritual. Which type of reproductive isolation mechanism does this scenario describe?(1 point)
Responses

Geographic Isolation
Geographic Isolation

Temporal Isolation
Temporal Isolation

Behavioral Isolation
Behavioral Isolation

Habitat Isolation

Human-created climate change is caused by(1 point)
Responses

increased use of green energy sources.
increased use of green energy sources.

increased oxygen in the air.
increased oxygen in the air.

decreased burning of fossil fuels.
decreased burning of fossil fuels.

increased carbon dioxide in the air.

Imagine the environment of an ecosystem changes such that it floods more often. Which species would most likely increase in numbers in this new environment?(1 point)
Responses

a tree species that is tolerant of excess water
a tree species that is tolerant of excess water

a mammal species that burrows underground
a mammal species that burrows underground

a flightless bird species that makes its nest on the ground
a flightless bird species that makes its nest on the ground

an insect species that lives on the leaves of short bushes

Answer 1

Here are the answers to your questions:

1. Which of the following species would have the greatest chance of going extinct?

   • Answer: a species with a slow reproduction rate and very little genetic variation living in a changing environment
   • Reason: This species would struggle to adapt to changes due to low genetic diversity and slow reproduction, making it more susceptible to extinction pressures.

2. Which of the following is believed to be common among all mass extinction events?

   • Answer: a significant change in the global climate
   • Reason: Major mass extinctions are often associated with drastic changes in climate, which can affect ecosystems and species survival globally.

3. Imagine two populations of penguins live in the same ecosystem. One population begins to exchange stones as a mating ritual while the other population begins to dance by shifting from one foot to the other. Individuals from each population will only mate with individuals that display the appropriate mating ritual. Which type of reproductive isolation mechanism does this scenario describe?

   • Answer: Behavioral Isolation
   • Reason: The populations are isolated from each other due to differences in mating rituals, preventing interbreeding despite living in the same environment.

4. Human-created climate change is caused by

   • Answer: increased carbon dioxide in the air.
   • Reason: Human activities, particularly the burning of fossil fuels, have led to increased levels of carbon dioxide in the atmosphere, contributing to climate change.

5. Imagine the environment of an ecosystem changes such that it floods more often. Which species would most likely increase in numbers in this new environment?

   • Answer: a tree species that is tolerant of excess water
   • Reason: A tree species adapted to tolerate excess water would thrive in a frequently flooded environment, while other species may struggle.