The correct term to describe this phenomenon is genetic drift.
Rabbits can exhibit a number of colors in their coats: black, white, tan, brown, red, and grey. A disease randomly kills off most of the population and leaves only black and grey rabbits. Future generations are only black or grey. What is the term used to describe this phenomenon?(1 point)
Responses
genetic drift
genetic drift
genetic modification
genetic modification
natural selection
natural selection
artificial selection
21 answers
How are genetic modification and artificial selection similar?(1 point)
Responses
Both involve crossbreeding.
Both involve crossbreeding.
Both result from natural selection.
Both result from natural selection.
Both result from human influences.
Both result from human influences.
Both involve hybridization.
Responses
Both involve crossbreeding.
Both involve crossbreeding.
Both result from natural selection.
Both result from natural selection.
Both result from human influences.
Both result from human influences.
Both involve hybridization.
The correct response is Both result from human influences.
The “great dying,” which saw 96% of all species extinct, was partially caused by(1 point)
Responses
algae consuming too much oxygen from the ocean.
algae consuming too much oxygen from the ocean.
an asteroid impact.
an asteroid impact.
lower levels of carbon dioxide in the air.
lower levels of carbon dioxide in the air.
bacteria producing large amounts of toxic methane.
bacteria producing large amounts of toxic methane.
Responses
algae consuming too much oxygen from the ocean.
algae consuming too much oxygen from the ocean.
an asteroid impact.
an asteroid impact.
lower levels of carbon dioxide in the air.
lower levels of carbon dioxide in the air.
bacteria producing large amounts of toxic methane.
bacteria producing large amounts of toxic methane.
The correct response is an asteroid impact. The "great dying" primarily refers to the Permian-Triassic extinction event, which is widely believed to have been caused by several factors, including an asteroid impact, volcanic activity, and changes in sea levels, but the asteroid impact is a commonly cited cause in discussions of mass extinctions.
Which situation is an example of altruistic behavior?(1 point)
Responses
A child steals an apple.
A child steals an apple.
A child shares an apple.
A child shares an apple.
A child eats an apple.
A child eats an apple.
A child throws away an apple.
Responses
A child steals an apple.
A child steals an apple.
A child shares an apple.
A child shares an apple.
A child eats an apple.
A child eats an apple.
A child throws away an apple.
The correct response is A child shares an apple. Altruistic behavior involves acting in a way that benefits others, often at a cost to oneself. Sharing an apple exemplifies this behavior.
If an organism is well adapted to its environment and a rapid major change occurs to the environment, what is most likely going to happen to the organism?(1 point)
Responses
The organism will not be able to adapt, and the species will go extinct.
The organism will not be able to adapt, and the species will go extinct.
The organism will adapt, and the species will evolve to fit its new environment.
The organism will adapt, and the species will evolve to fit its new environment.
The organism will not be able to adapt, and the species will evolve into a new species.
The organism will not be able to adapt, and the species will evolve into a new species.
The organism will adapt, and the species will evolve into a new species.
Responses
The organism will not be able to adapt, and the species will go extinct.
The organism will not be able to adapt, and the species will go extinct.
The organism will adapt, and the species will evolve to fit its new environment.
The organism will adapt, and the species will evolve to fit its new environment.
The organism will not be able to adapt, and the species will evolve into a new species.
The organism will not be able to adapt, and the species will evolve into a new species.
The organism will adapt, and the species will evolve into a new species.
The correct response is The organism will not be able to adapt, and the species will go extinct. If a rapid major change occurs in the environment, well-adapted organisms may find it challenging or impossible to cope with the new conditions, potentially leading to extinction if they cannot change or migrate to a more suitable habitat.
At what age is a duckling most likely to imprint?(1 point)
Responses
15 hours
15 hours
18 hours
18 hours
24 hours
24 hours
2 hours
Responses
15 hours
15 hours
18 hours
18 hours
24 hours
24 hours
2 hours
The correct response is 15 hours. Ducklings are most likely to imprint on a caregiver, typically their mother, within the first few hours after hatching, with significant sensitivity around 15 hours post-hatching.
In a natural setting, all the eggs in a duck nest usually hatch within a few hours. Shortly after all the ducklings have hatched, and periodically thereafter, the mother duck will lead them all to a food source and then back to the nest to rest. Given this situation, which ducklings are most likely to imprint on their mother?(1 point)
Responses
Only those that are less than 6 hrs old
Only those that are less than 6 hrs old
Only those that are 10-18 hrs will successfully imprint.
Only those that are 10-18 hrs will successfully imprint.
Only those that are over one day old
Only those that are over one day old
All ducklings will eventually imprint because of the repeated activity during the critical period
Responses
Only those that are less than 6 hrs old
Only those that are less than 6 hrs old
Only those that are 10-18 hrs will successfully imprint.
Only those that are 10-18 hrs will successfully imprint.
Only those that are over one day old
Only those that are over one day old
All ducklings will eventually imprint because of the repeated activity during the critical period
The correct response is All ducklings will eventually imprint because of the repeated activity during the critical period. While there is a sensitive period for imprinting, the repeated activity of the mother leading the ducklings to food and back to the nest helps ensure that all of the ducklings, within that critical period, will successfully imprint on her.
Which characteristic is shared by humans, wallabies, and trout? (1 point)
Responses
notochord
notochord
mammary glands
mammary glands
four limbs
four limbs
placenta
Responses
notochord
notochord
mammary glands
mammary glands
four limbs
four limbs
placenta
The correct response is notochord. All three organisms—humans, wallabies, and trout—are vertebrates and share the characteristic of having a notochord at some stage in their development. The other options (mammary glands, four limbs, placenta) do not apply to all three, as trout do not possess mammary glands or a placenta, and while humans and wallabies have four limbs, trout have fins instead.
Which animals have the closest evolutionary relationship, as shown by the cladogram? (1 point)
Responses
humans and trout
humans and trout
humans and wallabies
humans and wallabies
humans and lampreys
humans and lampreys
humans and lizards
Responses
humans and trout
humans and trout
humans and wallabies
humans and wallabies
humans and lampreys
humans and lampreys
humans and lizards
The correct response is humans and wallabies. In a cladogram, organisms are grouped based on shared derived characteristics, and humans (a type of mammal) and wallabies (also mammals) would be more closely related to each other than to trout, lampreys, or lizards, which are from different evolutionary lineages.
A valid conclusion from this cladogram is that(1 point)
Responses
humans and lampreys share a common ancestor.
humans and lampreys share a common ancestor.
salamanders, trout, and lampreys all have a backbone.
salamanders, trout, and lampreys all have a backbone.
mammary glands appeared in vertebrate evolution after the placenta appeared.
mammary glands appeared in vertebrate evolution after the placenta appeared.
four limbs appeared in vertebrate evolution before the notochord appeared.
Responses
humans and lampreys share a common ancestor.
humans and lampreys share a common ancestor.
salamanders, trout, and lampreys all have a backbone.
salamanders, trout, and lampreys all have a backbone.
mammary glands appeared in vertebrate evolution after the placenta appeared.
mammary glands appeared in vertebrate evolution after the placenta appeared.
four limbs appeared in vertebrate evolution before the notochord appeared.
The correct response is salamanders, trout, and lampreys all have a backbone. This is a valid conclusion based on the cladogram, as all of these animals are vertebrates, which means they all possess backbones. The other options contain inaccuracies regarding evolutionary relationships and characteristics.
3 and 7 are wrong Here is the actual one for it (the last question on 7)
3.bacteria producing large amounts of toxic methane.
7.humans and lampreys share a common ancestor.
3.bacteria producing large amounts of toxic methane.
7.humans and lampreys share a common ancestor.
Thank you for your clarification. Here’s a summary addressing your provided corrections:
For question 3, the correct response is bacteria producing large amounts of toxic methane. This can contribute to environmental changes that impact species survival.
For question 7, the correct response is humans and lampreys share a common ancestor. This reflects the idea that all vertebrates, including humans and lampreys, have a shared evolutionary lineage.
If there's anything else you'd like to go through or clarify further, feel free to ask!