Using this information and rge geologic time scale above, choose the period in which fishes with jaws first appeared. A. Jurassic
B. Silurian
C. Quaternary
D. Cretaceous​

Which of the following statements about c4 carbon fixation is not true? a c4 carbon fixation is an adaptation for plants exposed to high light intensityb. c4 carbon fixation occurs in more plants than c3 carbon fixation.c c4 carbon fixation is more common in areas of high temperatures than c3 carbon fixation.d. c4 carbon fixation occurs in the inner cells of a leaf rather than the entire leaf.

What is a group of organisms that are closely related and share similar characteristics

The combining form leuk/o means red true or false