According to the video, what is the primary function of the pilomotor reflex (goosebumps) in animals like birds or dogs?

To make them look bigger to predators or hold more air for warmth

To improve their sense of touch

To help them shed fur or feathers

Match the term with an example of that structure.

Wisdom teeth in humans no longer are necessary since we eat softer foods.

Various vertebrates have a pentadactyl limb, like humans, bats, and whales, with a common origin

Wings of birds and the wings of insects serve similar functions in flight but different origins.

What defines homologous structures?

Structures that share a common ancestor and similar anatomy, but may have different functions.

Structures that have the same function but different anatomy.

Structures that have different functions and different anatomy.

Structures that have no common ancestor but perform similar functions.

What is the key characteristic of analogous structures?

They have the same function but different underlying anatomy.

They have similar anatomy but different functions.

They share a recent common evolutionary ancestor.

They are structures that have lost their original function over time.

...

Interactive Video

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Science

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8th Grade

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Practice Problem

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Easy

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NGSS

MS-LS4-2, HS-LS4-2, HS-LS4-4

Standards-aligned

Megan Horvat

Used 4+ times

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