Which of the following is an output of photosynthesis?

a. oxygen

b. carbon dioxide

c. water

d. nutrients

Which is true of all crops that humans grow

What is population density? answers are A. the number of organisms of a species in a particular area. And B. the area occupied by a particular species in the ecosystem. C. the total number of organisms within a fixed area. And D.

Sample Response: The sound of the drumstick hitting the metal bar will get to me in a shorter amount of time in Scenario 1.

Are enzymes used up after they do there job

6. Adaptations that result from natural selection are expected to increase the fitness of an organism. In terms of natural selection, which of the following best describes fitness? a. Being able to escape from predators b.

Two parents think their baby was switched at the hospital. One parent has blood type "AB,"the other is heterozygous for blood type "B," and the baby has blood type "o." What is the likelihood of the parents having a baby with the Type O phenotype?

A characteristic that is inherited is called

Which biomes would be coldest

Which brain imaging technique can show what general region of the brain is active at a given moment by measuring the amount of glucose in various areas of the brain and then sending this information to a computer for analysis

Which type of protein plays an important role in transmitting signals in the nervous system