How many eggs can a Black Widow spider's smooth sacs contain?

The correct answer indicates that a Black Widow spider's smooth sacs can contain a significant number of eggs, typically ranging from 30 to 400. This range is indicative of the spider's reproductive strategy, which often involves laying multiple eggs to increase the chances of offspring survival.

Black Widow spiders can produce multiple egg sacs throughout their lifetime, and a single sac can hold a substantial number of eggs, allowing for a large potential offspring population. It's important to note that environmental factors and the female spider's health can influence the number of eggs she lays, but the average range encompasses 30 to 400 eggs in a single sac.

The other responses suggest either much lower or unrealistically high counts, which do not align with known biological data regarding Black Widow spiders. Thus, understanding the reproductive habits and capabilities of these spiders helps explain why the chosen response accurately represents the typical egg count.