Q: Answer the following question given this paragraph: Cell division is just one of the stages that all cells go through during their life. This includes cells that are harmful, such as cancer cells. Cancer cells divide more often than normal cells, and grow out of control. In fact, this is how cancer cells cause illness. In these concepts, you will read about how cells divide, what other stages cells go through, and what causes cancer cells to divide out of control and harm the body. Q: All cells undergo what during a lifetime, but when this process is out of control, cancer results? Choices: - cell transition - cell death - cell mutation - cell division A:
A: cell division

Q: Answer the following question given this paragraph: The central vacuole maintains turgor pressure against the cell wall. Q: The central vacuole maintains turgor pressure against what? Choices: - the cell move - the cell multiplication - the cell addition - the cell wall A:
A: the cell wall

Q: Answer the following question given this paragraph: Spermatogenesis As just noted, spermatogenesis occurs in the seminiferous tubules that form the bulk of each testis (see Figure 27.4). The process begins at puberty, after which time sperm are produced constantly throughout a man's life. One production cycle, from spermatogonia through formed sperm, takes approximately 64 days. A new cycle starts approximately every 16 days, although this timing is not synchronous across the seminiferous tubules. Sperm countsthe total number of sperm a man producesslowly decline after age 35, and some studies suggest that smoking can lower sperm counts irrespective of age. The process of spermatogenesis begins with mitosis of the diploid spermatogonia (Figure 27.5). Because these cells are diploid (2n), they each have a complete copy of the father's genetic material, or 46 chromosomes. However, mature gametes are haploid (1n), containing 23 chromosomesmeaning that daughter cells of spermatogonia must undergo a second cellular division through the process of meiosis. Q: How many chromosomes do mature gametes contain? Choices: - 19 - 13 - 17 - 23 A:
A: 23

Q: Answer the following question given this paragraph: 28.5 Red algae and green algae are the closest relatives of land plants. Q: Red algae and green algae are the closest relatives of what? Choices: - transfer plants - arctic plants - water plants - land plants A:
A: land plants