approximately 2.2 billion years ago which gas was first added in large amounts to earth atmosphere from life forms that evolved in the oceans

What provides a plant with new sources of nitrogen? A. Water B. Air C. Fertilizer D. Bacteria Choose all that apply

Both a fast-moving stream and a dog respond to the environment and grow and develope, but this characteristic of life is why a dog is considered alive and a stream isn't.

Martha wrote the following sentences to describe a specific geologic feature. "This is an asymmetric block of Earth. It was formed when crust was uplifted and tilted along a major fault zone.

LII-ralli Which statement best explains how enzymes speed up chemical reactions? Enzymes use light energy to speed up chemical reactions. Enzymes gain heat from chemical reactions. Enzymes change shape during chemical reactions.

If there were no decomposers, which of the following would most likely happen?

Do plants provide an important contribution in shapingof the environment?

Two people are standing together in an elevator, but they do not speak to each other or look each other in the eye. erving goffman called this type of interaction

A person without a spleen a) cannot survive. B) cannot synthesize red blood cells. C) cannot synthesize white blood cells. D) may need antibiotic therapy. E) may need blood transfusions to prevent anemia.

What is it called when a person is in a state of deep unconsciousness from which he or she cannot be aroused?

To offset high levels of carbon dioxide which of the following is the most viable option? A. pump oxygen in using oxygen tanks B. include indoor plants C. take shorter or less breathes D. keep windows and doors closed