Which of the following is a true statement about Charles...

Name: Problem 2, Chapter 13: Campbell Essential Biology with Physiology
Uploaded: 2020-05-02T21:41:22-08:00
Duration: 3 min 7 s
Channel: Dennis Howard
Description: Which of the following is a true statement about Charles Darwin? a. He was the first to discover that living things can change, or evolve. b. He based his theory on the inheritance of acquired traits. c. He proposed natural selection as the mechanism of evolution. d. He was the first to realize that Earth is more than 6,000 years old.

Which of the following is a true statement about Charles Darwin? a. He was the first to discover that living things can change, or evolve. b. He based his theory on the inheritance of acquired traits. c. He proposed natural selection as the mechanism of evolution. d. He was the first to realize that Earth is more than 6,000 years old.

Which of the following is a true statement about Charles Darwin?
a. He was the first to discover that living things can change, or evolve.
b. He based his theory on the inheritance of acquired traits.
c. He proposed natural selection as the mechanism of evolution.
d. He was the first to realize that Earth is more than 6,000 years old.

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Key Concepts

Natural Selection

Natural selection is the process by which individuals with traits that are better suited to their environment tend to survive and reproduce in greater numbers, passing on those advantageous traits to future generations. This mechanism is central to Darwin’s theory of evolution, explaining how species adapt over time through differential survival and reproduction.

Evolution

Evolution refers to the change in the heritable characteristics of biological populations over successive generations. It is a fundamental concept in biology that explains the diversity of life and the process by which new species arise, with Darwin's work providing a natural mechanism—natural selection—for this process.

Lamarckism

Lamarckism is an early evolutionary theory that proposed the inheritance of acquired traits, suggesting that organisms can pass on characteristics acquired during their lifetime to their offspring. This idea contrasts with Darwin's theory of natural selection, which emphasizes that heritable variations occur naturally and that advantageous traits become more common in a population over time.

Transcript

00:01 Which of the following is a true statement about charles darwin? so we have for a, he was the first to discover that living things can change or evolve.

00:11 You know that's not true because a lot of scientists prior to darwin knew that living things can change or evolve.

00:20 Darwin just proposed a mechanism for it.

00:23 So that was the difference here.

00:24 The idea that living things changed was something that was quite prevalent at the time even before darwin.

00:31 But just darwin put a mechanism that drives this change behind that idea.

00:39 So he made it more scientific, one could say, and he proposed a possible way in which that happened.

00:47 So people knew it happened.

00:48 He just explained how.

00:50 So a is not the correct answer.

00:52 Then we have b.

00:53 He based his theory on the inheritance of acquired traits, and we know that acquired traits usually are not passed on to the next generation.

01:02 Now i say usually because there's also what we have called epigenetics, which is the environmental changes to the genome that are acquired throughout a organism or a cell's lifetime.

01:17 And those could be, since there are changes to the genome, they could be passed on, but just acquired traits such as a giraffe having to stretch its neck a lot and that neck size increasing over the generations...

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