The fossil record shows that the average size of black bears was large during cold glacial periods and got smaller during warmer time periods. What is this an example of? a. directional selection b. disruptive selection c. ecosystem selection d. stabilizing selection

directional selection

Explanation:

Based on the information provided within the question it can be said that this scenario is describing the term known as directional selection. This term refers to a type of natural selection in which a certain characteristic of the species moves to one extreme as opposed to another. Which in this case refers to the bears size.

Based on the information provided within the question it can be said that this scenario is describing the term known as directional selection. This term refers to a type of natural selection in which a certain characteristic of the species moves to one extreme as opposed to another. Which in this case refers to the bears size.

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

hope this   and an i get brainlsiest

i think that it is plants