Which of these is a characteristic of index fossils? A. Found in the topmost rock layer
B. Found in many layers of the same rock
C. Have already established relative age.
D. Are limited to a particular geographic location

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.

Ais a group of individuals of the same that exist together in the same place at the same time

How do specific cell structures and organelles contribute to maintaining homeostasis in the cell?