What happens when the stomata on a plant's leaves are open?

a.) oxygen and water escape the leaves and carbon dioxide enters it.
b.) sugars and nutrients are transported up to the leaves from the roots.
c.) sunlight is able to enter the leaves and photosynthesis takes place.
d.) water enters the leaves and carbon dioxide escapes from the leaves.

What will happen to a population of predators if there is a sudden, temporary increase in the number of prey? a. the population of predators will be uniform with no change. b. the population of predators will increase first and then decrease slowly. c. the population of predators will increase continuously.

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks