5.20 Discussion: The Effects of Acidity on Seed Germination Discuss your investigation about reducing the effect of acidity on seed germination with your classmates.

Describe your design solution and how you conducted your experiment.
Was your solution successful? Explain by citing evidence from your experiment.
How could you refine your solution to make it better?
How does your design solution compare to the designs of other students?

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.

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.

c is the correct answer hope this !