Theoretically, P

question 36

Multiple Choice

Theoretically, P.bursaria can obtain zoochlorella either vertically (via the asexual reproduction of its mother cell) or horizontally (by ingesting free-living Chlorella from its habitat) . Consider a P. bursaria cell containing zoochlorellae, but whose habitat lacks free-living Chlorella. If this cell subsequently undergoes many generations of asexual reproduction, if all of its daughter cells contain roughly the same number of zoochlorellae as it had originally contained, and if the zoochlorellae are all haploid and identical in appearance, then what is true?

• A) The zoochlorellae also reproduced asexually, at an increasing rate over time.
• B) The zoochlorellae also reproduced asexually, at a decreasing rate over time.
• C) The zoochlorellae also reproduced asexually, at a fairly constant rate over time.
• D) The zoochlorellae reproduced sexually, undergoing heteromorphic alternation of generations.
• E) The zoochlorellae reproduced sexually, undergoing isomorphic alternation of generations.

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Definitions:

Calcium Ion Blocking

The process or action of inhibiting the movement of calcium ions through channels, affecting muscle contraction and other physiological activities.

Sarcoplasmic Reticulum

A specialized type of smooth endoplasmic reticulum in muscle cells, involved in the regulation of calcium ions concentration.

Tropomyosin Molecule

A protein that wraps around actin filaments in muscle cells and regulates muscle contraction by controlling the access of myosin to actin.

Tetanus

A bacterial infection characterized by muscle spasms, often starting in the jaw and then spreading to other parts of the body.