Answer:
True.
Explanation:
The diaphragm is like a pump; to bring in air, it opens up, pulling air in. To release it, it closes back down, forcing air out.
Answer:
300,000 years ago
Explanation:
Homo sapiens evolved from their early hominid predecessors between 200,000 and 300,000 years ago and developed a capacity for language about 50,000 years ago.
Answer:
Organisms can be either producers or consumers in terms of energy flow through an ecosystem. A trophic level refers to an organism's place in the food chain.
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Answer:
Biogeochemical cycle is one of the several natural cycles, in which conserved matter moves through biotic and abiotic parts of a ecosystem. In biology, conserved matter refers to the finite amount of matter, in the forms of atoms, that present within the earth.
Explanation: It is true that the chemical is one of the natural cycles within earth