15. How does a mother's age affect the likelihood of her having a baby with Down syndrome? A. The likelihood increases substantially after age 40.
b
The likelihood decreases substantially after age 40.
C. Age has no effect.

d The likelihood increases at first, then decreases after age 20.

Which ocean is on the eastern coast of north and south america? arctic ocean indian ocean pacific ocean atlantic ocean

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.

Analyze how the four requirements for life were identified by scientists