Question

1. what are tightly coiled pieces of dna and histone proteins called?

a. chromatin
b. chromosomes
c. chromatids

1. which of the following cells is not produced by mitosis?

a. blood cells
b. egg cells
c. somatic cells

1. which of the following is not true of mitosis?

a. produces genetically identical daughter cells
b. replaces worn out or damaged cells
c. produces cells that perform a different function

1. during which what is a cell growing, replicating its dna, and carrying out normal cell functions?

a. prophase
b. interphase
c. telophase

1. what is the name of the system of microtubules that help separate duplicated chromosomes?

a. spindle fibers
b. centrioles
c. chromatin

1. what is programmed cell death called?

a. cytokinesis
b. cancer
c. apoptosis

1. during which phase do cells spend most of their time?

a. prophase
b. metaphase
c. interphase

1. what is caused by the uncontrolled growth and division of abnorm cells in the body?

a. apoptosis
b. cancer
c. genetic disorders

Explanation:

1. Chromosomes are tightly coiled DNA - histone complexes. Chromatin is less condensed DNA - histone material, and chromatids are parts of replicated chromosomes.
2. Egg cells are produced by meiosis (a type of cell division for sexual reproduction), while blood cells and somatic cells (body cells) are produced by mitosis.
3. Mitosis produces genetically identical daughter cells (for growth, repair like replacing worn - out cells). It does not produce cells with different functions (that's more related to cell differentiation which can occur after mitosis in some cases, but mitosis itself doesn't do that).
4. Interphase is the phase where the cell grows, replicates DNA, and does normal functions. Prophase and telophase are stages of mitosis (nuclear division).
5. Spindle fibers are the microtubule system that separates duplicated chromosomes. Centrioles help organize spindle fibers, and chromatin is DNA - protein material.
6. Apoptosis is programmed cell death. Cytokinesis is the division of the cytoplasm (part of cell division), and cancer is uncontrolled cell growth.
7. Cells spend most of their time in interphase (preparing for division if they divide). Prophase and metaphase are short - lived stages of mitosis.
8. Cancer is caused by uncontrolled growth and division of abnormal cells. Apoptosis is cell death, and genetic disorders are related to gene mutations (not directly to uncontrolled cell growth in the sense of cancer).

Answer:

1. b. chromosomes
2. b. egg cells
3. c. produces cells that perform a different function
4. b. interphase
5. a. spindle fibers
6. c. apoptosis
7. c. interphase
8. b. cancer