Which of the following is an abiotic factor in an environment? a. a tree b. a snake c. a snail d. a rock

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

its temperature is increasing. this causes molecular vibrations to increase.