How do scientists classify animals? Check all that are true.
2 by their adaptations
how they develop
- O how they perform cellular respiration
by their DNA
O by their body structure

Explanation:

You can classify items in all kinds of ways--size, shape, purpose, color and so on. Scientists use this skill to organize information and objects. Scientists group or classify animals by characteristics that they all have in common.

d is the answer

sorry if its wrong!

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.