A pheromone is:

A: A substance that only is used when an animal is in danger.

B: A type of equine.

C: A chemical that can alert other living things.

D: A brain wave

Greg says that he usually eats 1 medium carrot every day to ensure that he's consuming enough vitamin a. today he said he didn't eat any carrots and is worried that there is not enough vitamin a in his system.

Is fungi a very low form of plant life?

What's one cause of the heat island effect? A. Pollution of groundwater B. Reduced rainfall in urban areas C. Higher albedo in urban areas D. Lower albedo in urban areas

Which correctly describes the similarities between identical twins? a. They are genetic copies of each other. b. Their DNA is similar but not exactly the same. c. Their DNA is the same as their father's. d. they are as similar as any two siblings.

Products of cellular respiration

Why are most open ocean organism found in the epipelagic zone?

What is the purpose of a hypothesis? O A) It specifies the procedure for a scientific experiment. OB) It is a prediction of whether an experiment will give useful results. OC) It tells other scientists what kind of research they should be doing.

What plays many roles in the body and determines many traits

Which of the following has the greatest level of certainty? Law Theory Hypothesis None of the above

Is there any place on Venus humans could live? Explain.