The rate at which materials enter and leave the cell depends on the cell's

1. volume.

2. weight.

3. speciation.

4. surface area.

In order for a cell to divide successfully, the cell must first

1. duplicate its genetic information.

2. decrease its volume.

3. increase its number of chromosomes.

4. decrease its number of organelles.

The process that increases genetic diversity within a population is

1. asexual reproduction.

2. sexual reproduction.

3. cell division.

4. binary fission.

Describe what is meant by each of the following terms: cell volume, cell surface area, ratio of surface area to volume.

Describe asexual and sexual reproduction as survival strategies.

Calculate Calculate the ratio of surface area to volume of an imaginary cubic cell measuring 4 mm long on each side.

Form a Hypothesis In a changing environment, which organisms have an advantage—those that reproduce asexually or those that reproduce sexually? Explain your answer.

Sister chromatids are attached to each other at an area called the

1. centriole.

2. spindle.

3. centromere.

4. chromosome.

If a cell has 12 chromosomes, how many chromosomes will each of its daughter cells have after mitosis and cytokinesis?

1. 4

2. 6

3. 12

4. 24

Which of the illustrations below best represents metaphase of mitosis?

In plant cells, what forms midway between the divided nuclei during cytokinesis?

1. nuclear membrane

2. centromere

3. cell membrane

4. cell plate

Describe how a eukaryotic cell's chromosomes change as a cell prepares to divide.

What is the relationship between interphase and cell division?

List the following stages of mitosis in the correct sequence, and describe what happens during each stage: anaphase, metaphase, prophase, and telophase.

Compare and Contrast How is the process of cell division in prokaryotes different from cell division in eukaryotes?

Form a Hypothesis Some cells have several nuclei within their cytoplasm. Considering the events in a typical cell cycle, which phase of the cell cycle is not operating when such cells form?

Compare and Contrast Describe the differences between cell division in an animal cell and cell division in a plant cell.

Relate Cause and Effect The nerve cells in the human nervous system seldom undergo mitosis. Based on this information, explain why complete recovery from injuries to the nervous system usually does not occur.

Apply Concepts A scientist treats cells with a chemical that prevents DNA synthesis. In which stage of the cell cycle will these cells remain?