How did Lamarck and Darwin differ in their thinking about species?

A. Darwin thought that organisms could induce their own changes, while Lamarck thought that change could only be induced by an organism's environment.

B. Darwin thought that change could occur in individual organisms, while Lamarck thought that change could only occur across generations.

C. Darwin thought that genes controlled a species' ability to survive, while Lamarck thought that genes were only one part of a species' ability to adapt*******?

D. Darwin thought that organisms had to struggle to survive, while Lamarck thought that organisms could make adjustments when conditions became difficult.

1.A

2.D
3.A
4.D
5.D
6.B
7.D
8.D
9.A
10.D
11.B
12.C
13.C
14.B
15. common ancestor
16. punctuated equilibrium
17. adaptation
18. overproduction
19. body
20. artificial selection
21. inheritance
22. homologues structures
23. older

These are the answers for the whole assignment.

The correct answer is D. Darwin thought that organisms had to struggle to survive, while Lamarck thought that organisms could make adjustments when conditions became difficult.

To understand this, it is important to know the basic differences between Lamarckian and Darwinian evolution.

Lamarck proposed the theory of inheritance of acquired characteristics, also known as Lamarckian evolution. According to Lamarck, an organism could change its characteristics or traits during its lifetime in response to its environment. These acquired traits could then be passed down to future generations. Lamarck argued that this process of adaptation and inheritance was the main driver of evolution.

On the other hand, Darwin's theory of evolution, known as Darwinian evolution, proposed the concept of natural selection. According to Darwin, individual organisms within a species show variations in their traits. Some of these variations may be more beneficial for survival and reproduction, while others may be less advantageous. Individuals with traits that increase their chances of survival are more likely to reproduce and pass on those favorable traits to the next generation, while individuals with less favorable traits are less likely to reproduce.

So, in terms of the given options, D is the correct answer as it accurately represents the difference between Lamarck and Darwin. Lamarck believed that organisms could make adjustments when conditions became difficult, while Darwin emphasized the idea that organisms had to struggle to survive, with only the most well-adapted individuals passing on their traits.