Earths history which of the following is the best example of an index fossila. animal paw printb. a trilobite fossil c. a dinosaur bone d. a fern print on a rock which best signifies the reason for extinction of various species a. climactic events b. natural selection c. survival of the fittest d. disease

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set