The phenotype ratio for a monohybrid cross of heterozygotes is ___.

9:3:3:1

1:1

3:1

1:1:1:1

This is a coral reef ecosystem. many biotic and abiotic factors affect the health of this ecosystem. which set correctly pairs a biotic factor and an abiotic factor?

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.

The activity of the modern sample is 1.10 bq . how long does that measurement take?