Which of the following is true?

A. Most of the species that have ever existed still exist today.

B. About half of the species that have ever existed still exist today.

C. All the species that have ever existed still exist today.

D. Most of the species that have ever existed are extinct today.

The graph shows the solubility of several different salts in water, across a range of temperatures. according to the graph, which salt can dissolve at a concentration of about 60 g/100 cm3 of water at 40 degrees celsius?

How many years would it take the atlantic ocean to grow 500 centimeters? show your work.

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.