Question

1. why are conservation efforts considered urgent?

a. they complicate human activities
b. they are unnecessary
c. they help prevent extinction and maintain biodiversity
d. they are only needed for popular species

1. selective breeding leading to the creation of high - yielding crops like maize from wild ancestors exemplifies:

a. natural selection
b. evolutionary selection
c. environmental adaptation
d. artificial selection

1. what is a limitation of fossil records in understanding evolution?

a. soft - bodied organisms are well - preserved.
b. they provide incomplete records.
c. they offer a continuous evolutionary timeline.
d. fossilization occurs frequently.

Explanation:

• For question 25, conservation efforts aim to prevent species extinction and maintain biodiversity, which is why they are urgent. Option a is incorrect as they don't complicate human activities in a negative sense, option b is wrong as they are necessary, and option d is false as they are for all species at risk.
• For question 26, selective breeding by humans to create high - yielding crops like maize from wild ancestors is artificial selection. Natural selection is driven by nature, evolutionary selection is a broad term not specific to human - driven breeding, and environmental adaptation is a result of organisms adjusting to their environment, not human - controlled breeding.
• For question 27, fossil records are incomplete because not all organisms fossilize well, especially soft - bodied ones. Soft - bodied organisms are not well - preserved (contrary to option a), they don't offer a continuous timeline (so option c is wrong), and fossilization is a rare event (option d is incorrect).

Answer:

1. c. They help prevent extinction and maintain biodiversity
2. d. Artificial selection
3. b. They provide incomplete records