General Biology 2: Reproduction and Development

Subject: Biology 2

Topic: Reproduction and Development

Difficulty: Hard

Questions: 5

Passing Score: 70%

Question #1 1 point

A remote island is colonized by a single female insect capable of parthenogenesis (asexual reproduction). Five years later, the island is crowded with her identical clones. However, a new parasite arrives that targets their specific immune protein. Why is this population at a higher risk of total extinction than a sexually reproducing one?

A: Asexual populations are physically smaller and thus more fragile.

B: The lack of "Crossing Over" during meiosis means they lack the genetic recombination needed to produce an offspring with a mutant, resistant protein.

C: Asexual organisms consume more energy than sexual ones, leaving them too weak to fight infection.

D: Cloned DNA is structurally unstable and degrades when exposed to parasites.

Question #2 1 point

If you were to chemically inhibit "Crossing Over" during meiosis in a flowering plant, what would be the most likely long-term impact on that plant’s lineage?

A: The plant would lose the ability to perform photosynthesis.

B: The offspring would become genetically identical to the parents, reducing the "diverse genetic toolkit" available for environmental adaptation.

C: The seeds would be unable to develop a protective coat.

D: The plant would be forced to switch to a heterotrophic nutritional strategy.

Question #3 1 point

Why is reproduction described in your material as a "universal feature of all known life" rather than just a biological option?

A: Because it is the only process that ensures the continuity of a species and prevents its inevitable extinction over time.

B: Because it is the primary way organisms generate heat for the ecosystem.

C: Because individual organisms can only grow larger through the process of mating.

D: Because the environment requires a constant increase in species numbers to maintain gravity.

Question #4 1 point

A gardener grows tomatoes from "cuttings" (clones), while a neighbor grows them from "seeds" (sexual reproduction). During a severe heatwave, the neighbor's garden survives while the gardener's dies. What biological principle explains this?

A: Clones are not recognized by the sun, so they cannot perform gas exchange.

B: Sexual reproduction reshuffles genetic material, meaning some of the neighbor's plants likely inherited a natural tolerance to heat.

C: Cuttings are biologically "older" than seeds and cannot withstand weather changes.

D: Asexual reproduction prevents the plant from absorbing water during the day.

Question #5 1 point

In an environment that is rapidly changing and highly stressful, why is sexual reproduction considered an evolutionary "investment"?

A: It requires only one parent, which saves resources.

B: It produces offspring faster than any asexual method.

C: t creates variations via genetic recombination, increasing the probability that some offspring will survive new threats.

D: It ensures that every offspring is perfectly suited to the current environment.

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