Question

The results showed that during the early juvenile stages, Daphnia in the different tanks grew at similar rates. However, in tanks with fewer Daphnia, adults grew larger than in tanks with more Daphnia. Based on this information, what is the impact of a lack of space on Daphnia?
A.
Lack of space keeps Daphnia from reaching adulthood.
B.
Lack of space has no impact on how Daphnia grow.
C.
Lack of space causes Daphnia to grow to smaller sizes as adults.
D.
Lack of space causes Daphnia to grow faster when they are young.

Answer 1

C. Lack of space causes Daphnia to grow to smaller sizes as adults.

Explanation: Juvenile growth rates were similar, but adults in crowded tanks were smaller than those in less crowded tanks, showing crowding (lack of space) reduces adult size.