Evaluate the following statement: "Haplodiploidy is a sex determination system that is common to all insect species in the order Hymenoptera."

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The statement being evaluated claims that haplodiploidy is a sex determination system that is common to all insect species in the order Hymenoptera.
Option 1: 'True.' Proponents of this option would argue that haplodiploidy (f males from unfertilized eggs and females from fertilized eggs) is a hallmark feature of Hymenoptera and is widely observed across ants, bees, and wasps, suggesting it is characteristic of the order as a whole. They might also point to classic textbooks and early entomology literature that emphasize haplodiploidy as a defining trait of many hymenopterans.
Option 2: 'False. Wasps are hymenopterans but they have a completely different sex determination system.' This answer claims a different system in wasps, which would require evidence that some wasp lineages deviate from haplodiploidy. In reality, many wasps do use haplodiploidy, and while there are variations and exceptions in some lineages, stating a 'completely different' system for all wasps is an overgeneralization and not supported by broad consensus across Hymenoptera.
Option 3: 'This is not yet known by entomologists, because so many wasp species are extremely difficult to study safely.' This option suggests a gap in knowledge due to practical challenges. While there are species that are hard to study, the general understanding of haplodiploidy in Hymenoptera is well established for many groups, and the claim that it is entirely unknown across the order is inaccurate.
Option 4: 'False. Ants are hymenopterans but they have a completely different sex determination system.' This asserts a different system in ants, which contradicts the well-documented haplodiploid mechanism in many ant species. Although there are exceptions and variations in some taxa, the blanket statement that ants use a completely different system is unlikely and inconsistent with the broader pattern observed in Hymenoptera.
In summary, Option 1 aligns with the traditional view that haplodiploidy is a defining pattern discussed for Hymenoptera, while Options 2, 3, and 4 present overgeneralizations or inaccurate claims about the sex determination systems within various hymenopteran groups.

ENTOM2030/ENTOM2031 Post-Lecture 9 Quiz

Evaluate the following statement: "Haplodiploidy is a sex determination system that is common to all insect species in the order Hymenoptera."

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