Question

1. the 2nd stage of mitosis, metaphase, is defined by the following process:

a) the nuclear envelope/membrane and nucleolus dissolve
b) mitotic spindle pulls the chromosomes to opposite poles of the cell
c) centrioles cluster and align in the middle of the cell, midway between the chromosomes that are at opposite end of the cell
d) chromosomes cluster and align in the middle of the cell, midway between the centrioles that are at opposite ends of the cell

1. during telophase:

a) chromosomes uncoil to become thread - like chromatin again
b) mitotic spindle reassemble to form the nuclear membrane around the chromatin mass
c) nuclear envelope/membrane forms around each chromatin mass and nucleoli appear in each nucleus
d) both a) and b) occur during telophase
e) both a) and c) occur during telophase

Explanation:

1. In metaphase of mitosis, chromosomes align at the cell - equator (middle of the cell), midway between the centrioles at opposite ends of the cell.
2. During telophase, chromosomes uncoil to become chromatin again and the nuclear envelope/membrane forms around each chromatin mass and nucleoli appear in each nucleus.

Answer:

1. d) Chromosomes cluster and align in the middle of the cell, midway between the centrioles that are at opposite ends of the cell
2. e) Both a) and c) occur during telophase