1. a) Describe the two main phases of the cell cycle.
b) What must happen before mitosis can begin?
c) What is produced by mitosis?
d) What are the four steps of mitosis, in order?

a)  interphase and mitotic phase.b)  mitosis occurs after the completion of DNA replication and doubling of chromosome number.c) after mitosis two daughter cells are produced of equal number of chromosomes.d) prophase, metaphase, anaphase, and telophase.

Explanation:

a ) two phases of cell cycle:  interphase( in which DNA replication occurs, 3 stages of interphase are:  G1 phase, S phase and G2 phase) and mitotic ( in which division occurs) phase

b)  mitosis occurs after the completion of DNA replication and doubling of chromosome number and cell contents.

c) after mitosis, two daughter cells are produced of equal number of chromosomes.

d) four steps of mitosis are:  (i) prophase, (ii)metaphase,(iii) anaphase, and (iv) telophase.

1. Engelmann spruce!
2. blue [email protected]
3. subalpine fir#
4. cork-bark fir$
5. Douglas-fir &
6. bristle cone pine*