Question

For which one of the following observations were both Lamarck's hypothesis and Darwin's hypothesis in complete agreement?

Answer 1

Answer:

b. Gradual evolutionary change explains why organisms are well-suited to their environments.

Explanation:

Darwin and Larmack are both evolutionists  who  believed that the  present organisms  or offspring are descendants of previous organisms. And they are able to survive till today  from previous generation because they have certain  features  that make them resistant to  selective pressure in their environment. Lamarck called  concluded that  changes in the physical features of the present organisms from using a certain body part  more than others  in order to survive is the major reason for their existence and resistant to selective pressure. He called his theory Law of use and disuse .

Darwin believed that,  the ability to survive  by theses organisms  was due to  certain factor or trait(gene) which the descendants must have inherited from  the previous generations,. And these trait(gene) made them to resist selection pressures,and therefore  have higher competition for survival  than other organisms which lack these traits. Thus he concluded that nature must have selected these organisms with certain traits(genes) than others, He tagged his findings  theory if evolution by natural selection.

However both scientists believed that present organisms   are products of Gradual evolutionary changes of million of years ago.

Answer 2

Answer: Option B.

Gradual evolutionary chnges explain why organisms are well suited for their environment.

Explanation:

Lamarck and Darwin are both naturalist that formulate theories. Lamarck theory was called theory of acquired characteristics and Darwin theory was called theory of evolution by natural selection. The two scientist agree that gradual evolutionary changes I.e change in trait and characteristics explain why organisms are well suited in their environment. Lamarck theory describe changes that happen to organisms in their life time and how these changes are passed to their offsprings and Darwin theory supported these that organisms arise from natural selection and inherited variations which help them survive and reproduce in their environment.