Which statement about adult mayflies is true?

Which statement about adult mayflies is true?

• A. They eat and live for months
• B. They eat and live for years
• C. They spend weeks searching for mates
• D. They typically do not eat and live only a few hours to a couple days

Answer: (D)

Adult mayflies are an example of a life-history pattern where the flying stage is brief and focused on reproduction rather than feeding. The larvae live underwater for months to years, feeding and growing, but the adult stage is different. In adults, mouthparts are often reduced or nonfunctional, so they don’t eat. Energy stored during the nymphal stage supports quick, energy-demanding activities like rapid flight and mating, and the adult life lasts only a few hours to a couple of days. They emerge, mate, lay eggs, and die within a very short window, sometimes in swarms near the water. That’s why the statement that adults typically do not eat and live only a few hours to a couple days is the best description of their adult life.

Adult mayflies are an example of a life-history pattern where the flying stage is brief and focused on reproduction rather than feeding. The larvae live underwater for months to years, feeding and growing, but the adult stage is different. In adults, mouthparts are often reduced or nonfunctional, so they don’t eat. Energy stored during the nymphal stage supports quick, energy-demanding activities like rapid flight and mating, and the adult life lasts only a few hours to a couple of days. They emerge, mate, lay eggs, and die within a very short window, sometimes in swarms near the water. That’s why the statement that adults typically do not eat and live only a few hours to a couple days is the best description of their adult life.