Jack did an experiment to determine how different types of lights affect plant growth. He grew 5 plants in darkness, 5 plants in fluorescent light, 5 plants in LED light and 5 plants in sunlight. 1. What was Jack's independent variable?

2. What was Jack's dependent variable?

3. Which of these groups is the control group?

4. What are 3 constants Joe should have in his experiment?

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.

Science which of the following is an example of a cyclic behavior that is seasonal? i think the answer is d, i just need to double check : ). a. running from predators. b. searching for water. c. hunting at night. d. migrating for warmth. ***