Select all the statements that are TRUE

Question

BlackTom AI · Accepted Answer

When evaluating the two statements, it's important to separate the nuances of reproduction and evolutionary benefit.
Option 1: 'Most multicellular organisms reproduce sexually.' In many textbooks, it is stated that the predominant mode for multicellular life cycles is sexual reproduction, with meiosis and fertilization producing genetic diversity across generations. While there are exceptions (certain organisms or life stages that reproduce asexually), the general pattern among multicellular eukaryotes is a majority relying on sexual reproduction at some point in their life cycle. This makes the statement broadly true, though not universal.
Option 2: 'Sexual reproduction evolves to benefit the individual.' This claim is misleading. Sexual reproduction is thought to evolve primarily because it enhances genetic variation, which benefits populations by increasing adaptability and reducing the accumulation of deleterious mutations (mutational load). However, there are clear individual costs to sex—e.g., the twofold cost of males, the energy and risk of finding mates, and the potential disruption of favorable gene combinations. Because individuals often incur costs while the population gains the long-term advantage, this statement is not accurate when interpreted as a universal rule for individual benefit.
In summary, Option 1 aligns with the general tendency observed in many multicellular organisms, while Option 2 presents an incorrect view by attributing individual-level benefits to sex rather than population- or lineage-level benefits. The distinction hinges on whether the focus is on individual fitness versus population genetics and evolutionary advantage.

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