Which of the following is a biotic factor of an ecosystem? *

a. grass

b. a rock

c. air

What hormone causes the heart to pump faster?

Identify one abiotic factor in the diagram that functions as a limiting factor for the autotrophs in this ecosystem and explain why it would be considered a limiting factor

What is the importantence of the carbon and nitretan cycles in the environment

Based on evidence of the Red Shift of stars and galaxies, scientist now know that A) stars are sitting still. B) stars are moving toward one another. C) stars are moving away from one another. D) stars are all near the end of their life.

Which of the following energy sources causes the most pollution? A. geothermal B. coal C. biomass D. neutrons

Langkah awal metode ilmiah adalah

An agent used to reduce the number of bacteria on a toilet would most accurately be called a (n) An agent used to reduce the number of bacteria on a toilet would most accurately be called a (n) disinfectant. fungicide. aseptic. virucide. antiseptic.

True or false? most antigens are large, complex molecules that are not normally present in the body. a. True b. False

on October 6, both fin and humpback whales were heard in the same area at 1:30 am and at 2:30 am why do you think both species might have made noises at the same time.

The broadest classification level for organisms is A. kingdom, which includes Archaea, Bacteria, and Eukarya. B. kingdom, which includes Animalia, Plantae, and Fungi. C. domain, which includes Archaea, Bacteria, and Eukarya. D.