Question

cancer is the result of

uncontrolled cell division
cells which create working tissues
cells which have lost the ability to reproduce
cells which grow normally but no longer function correctly

question 10
if a living plant were moved from a freshwater aquarium to a saltwater aquarium, which of the following would occur?

the plants cells would block sodium movement
the plants cells would lose water.
the plants cells would lose sodium.
the plants cells would take in extra water.

question 11
during dna replication prior to meiosis, a frameshift mutation occurs. will this mutation be inherited?

yes, because frameshift mutations are always passed on to offspring
yes, because meiosis makes exact cellular copies.
yes, because the error happened in a somatic cell
yes, because the error happened in a gamete.

Explanation:

• Question 9: Cancer is characterized by uncontrolled cell division. Normal cells have mechanisms to regulate growth, but cancer cells lose these controls.
• Question 10: When a plant is moved from freshwater (hypotonic) to saltwater (hypertonic), water will move out of the plant cells by osmosis.
• Question 11: During DNA replication prior to meiosis, if a frameshift mutation occurs in a germ - line cell (which gives rise to gametes), the mutation can be inherited. Meiosis produces gametes, and if the mutation is in the DNA of cells that will form gametes, it can be passed on.

Answer:

• Question 9: a. Uncontrolled cell division
• Question 10: b. The plant's cells would lose water
• Question 11: d. Yes, because the error happened in a gamete