Question

Lamarck's vision of evolution differed from Darwin's in that Lamarck believed a. living things evolve in an upward direction. b. behavioral changes modify heritable traits. c. genetic differences among individuals in the population allow for evolution. d. a and b only. e. none of the above.

Name: Problem 2, Chapter 23: Biology
Uploaded: 2021-06-16T17:22:33-08:00
Duration: 1 min 41 s
Channel: Christina Sorrentino
Description: Lamarck's vision of evolution differed from Darwin's in that Lamarck believed a. living things evolve in an upward direction. b. behavioral changes modify heritable traits. c. genetic differences among individuals in the population allow for evolution. d. a and b only. e. none of the above.

   Lamarck's vision of evolution differed from Darwin's in that Lamarck believed
a. living things evolve in an upward direction.
b. behavioral changes modify heritable traits.
c. genetic differences among individuals in the population allow for evolution.
d. a and b only.
e. none of the above.

Biology

Eric P. Widmaier;… 4th Edition

Chapter 23, Problem 2

Instant Answer

Solved by Expert Christina Sorrentino

06/16/2021

Step 1

Lamarck believed that living things evolve in an upward direction, meaning that they continually improve and become more complex over time. This is option (a). Show more…

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Lamarck's vision of evolution differed from Darwin's in that Lamarck believed a. living things evolve in an upward direction. b. behavioral changes modify heritable traits. c. genetic differences among individuals in the population allow for evolution. d. a and b only. e. none of the above.

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Key Concepts

Darwinian Evolution

This theory explains evolution through the process of natural selection, where random genetic variations among individuals lead to differences in fitness. In Darwinian evolution, advantageous traits are preserved because they confer a survival or reproductive benefit, while disadvantageous traits are lost over time. Importantly, it relies on genetic inheritance and does not involve the transmission of traits acquired during an organism’s lifetime.

Lamarckian Evolution

This concept refers to the idea that species evolve through the inheritance of acquired traits. It posits that characteristics that an organism develops during its lifetime—such as behavioral adaptations or physical changes—can be passed down to future generations, leading to evolutionary change. Lamarck's view also implies a directional trend in evolution, suggesting that organisms evolve in a pre-determined or ‘upward’ way over time.

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