Which of the following statements correctly describes the full value of a keystone species on its ecological community?

A. They are non-native organisms that can damage the ecosystem, so removing them increases biodiversity.

B. They are the largest species in a community and consume more than the others, keeping other populations in check.

C. They are superior predators that displace inferior competitors.

D. They have a disproportionate effect relative to their frequency in the population, so the ecosystem often collapses when they are removed.

Plzzz hurry im being timed ! humans, like other organisms, require energy for growth and repair. when cells create atp for energy, carbon dioxide is produced as a waste product. how does the body respond to this process in order to maintain homeostasis? a. the digestive and respiratory systems interact to move carbon dioxide to the lower intestine, where it is transformed into methane. b. the circulatory and digestive systems interact to move carbon dioxide to the stomach, where it to break down food. c. the nervous and urinary systems interact to move carbon dioxide to the kidneys, where it is absorbed into the bloodstream. d. the circulatory and respiratory systems interact to transport carbon dioxide to the lungs, where it is expelled from the body.

Plants that have reproductive structures called cones are?

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?