Environmental changes have occurred throughout Earth's history and have been influenced by factors such as climate change, volcanic activity, and impacts of asteroids and comets. How have these changes affected life through time? A.
New lifeforms have evolved.
B.
Lifeforms have become extinct.
C.
Lifeforms have changed.
D.
all of these

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

The small molecule cyclic amp (camp) takes about 0.2 second to diffuse 10 μm, on average, in a cell. suppose that camp is produced near the plasma membrane on one end of the cell; how long will it take for this camp to diffuse through the cytosol and reach the opposite end of a very large cell, on average? assume that the cell is 200 μm in diameter.

Identify the structure in organisms that do not have kidneys that is adapted to regulate water balance