The gases that make up earth's atmosphere are commonly referred to as air. approximately what percentage of air is made up of gases other than nitrogen and oxygen?

Which cell organelle uses oxygen to produce energy for the cell to use for life?

Defective receptor on a cell membrane have the least effect on? 1. homeostasis 2. muscle activity 3. nerve signals 4. diffusion

What is the dominant vegetation of temperate rain forests?

Which of the following most significantly determines a communities' access to potable water? a. access to clean raw water sources b. the availability of money c. local drought conditions d. the level of industrial development

Which of the following statements comparing respiration in fish and in mammals is correct? A) The movement of the respiratory medium in mammals is bidirectional, but in fish it is unidirectional.

A child who consumes adequate calories but insufficient amounts of protein is most at risk for developing

The area of the cell, located inside the nucleus, where ribosomal rna is made.

When we look at snow melting is it due to the temperature or thermal energy?

Explain why biodiversity is important for the survival of species

How many teeth has fish?