The biological species concept classifies a species based on...

The biological species concept classifies a species based on
a morphological characteristics.
b reproductive isolation.
c the niche the organism occupies in the environment.
d genetic relationships between an organism and its ancestors.
e both a and b.

Key Concepts

Biological Species Concept

The Biological Species Concept defines a species as a group of individuals that can interbreed and produce fertile offspring, emphasizing the importance of reproductive compatibility as the basis for species delineation rather than morphological or genetic traits alone.

Reproductive Isolation

Reproductive isolation refers to the mechanisms that prevent individuals from different species or populations from interbreeding, ensuring that gene flow is limited to within a species and thereby maintaining the genetic distinctiveness of that species.

Transcript

00:01 Okay, so here we are looking at the biological species concept.

00:19 And what would help is to actually, first of all, just state.

00:26 What is the biological species concept? well, you're considered to be of the same species if your populations can interbreed.

00:58 Produce not just any offspring, fertile offspring.

01:16 Why is that word important? well, sometimes we can have two populations that can interbreed and produce offspring, but they're not fertile.

01:31 Okay, for example, a horse and a donkey can interbreed, and they will have offspring.

01:38 We call it a mule, but mules are sterile.

01:41 So since their offspring is not fertile, horses and donkeys are not considered in the same species.

01:52 They are considered different species.

01:54 So that's your biological species concept.

01:58 Your populations have to interbreed and produce fertile offspring.

02:02 So now let's look at our options here.

02:05 Morphological characteristics.

02:08 What is morphological about? physical appearance.

02:30 Okay, and we actually do have a species concept based on physical appearance.

02:38 The guy linnaeus, who classified everything, he didn't have, you know, a lot to go on except physical appearance.

02:48 And that is actually, because of the name, is called the morphological species concept.

03:01 So it's not the biological species concept because it's the morphological species concept.

03:12 Reproductive isolation.

03:16 Okay.

03:17 That has to do with whether you can or cannot reproduce with each other...

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