An ecosystem is self-sustaining as long as organ - isms have sufficient quantities of energy, oxygen, minerals, and water. when organisms die, some of these materials are recycled back to plants in the ecosystem primarily through the activity

Which statement best describes the atoms in a gas

Where can signals that regulate the cell cycle come from name three sources answer?

Which kingdom is composed of multicellular autotrophs?

How could restrictions on mitosis harm an organism

Equivalent Expressions Quiz Active 1 2 6 Which expression is equivalent to pq? .

Suppose you use a microphone to look at a cell from the skin of an onion. What structure will you see that would not be found in a cell from your skin

This part of Earth's surface is where water is in solid form, including sea ice, lake ice, river ice, snow cover, glaciers, ice caps and ice sheets, and permafrost. Collectively, this sphere is called the

Which of the following is true regarding the organization of muscle tissue

Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. Once a virus gains entry into the body, it invades a host cell in order to? A. synthesize antibodies for defense B. deactivate the host cell's defenses C.

An anthropologist finds a fossil in Africa that is 100,000 years old. To which species could the specimen belong?