What is a typical life cycle stage for banana slugs after mating?

• A. Eggs hatch into juvenile slugs that immediately reproduce.
• B. Eggs hatch into juvenile slugs that become adults within days.
• C. Eggs hatch into tiny slugs that never mature.
• D. Eggs hatch into juvenile slugs that grow into adults over months to years.

Answer: (D)

The main idea is the time it takes for banana slugs to reach reproductive maturity after hatching. After eggs hatch, the young slugs are tiny and must grow before they can reproduce. In banana slugs, this growth period lasts for months to years, so they only reproduce once they become adults. They are hermaphroditic, meaning individuals have both mating roles, but even so, mating and egg-laying occur after they’ve reached maturity, not right at hatching. That’s why the option describing eggs hatching into juvenile slugs that grow into adults over months to years best fits their life cycle. The other possibilities imply immediate reproduction or no maturation, which doesn’t align with how these slugs develop.