Which of the following are represented by upper and lowercase letters? A. proteins B. chromosomes C. genotypes D. phenotypes​

Which of the following will not cause mass extinction? a. drastic change is weather b. geological change c. both a and b d. none of the above

Mike has a problem with his testosterone. he is unable to produce enough. which will most likely be affected by his inability to produce testosterone? check all that apply.

Acommon kind of mechanical weathering is called