Which description can be used for sand on a beach?

How does drug use affect dopamine?

An idea proposed to explain observations is called a

All living organisms are composed of A. only one cell. B. at least 100 cells. C. at least three cells. D. one or more cells.

You are about to be sent to a remote area by WHO where you will be working with infectious diseases caused by a variety of microorganisms.

Plant species F has a diploid number of 8. Plant species G has a diploid number of 10. What would be the diploid number of an allopolyploid hybrid of species F and species G?

Nitrogen is made available in a useful form for animals in the A. fertilizers they absorb. B. plants they eat. C. air they breathe. D. rainwater they drink.

4. One advantage of biodiversity in an ecosystem is ... 1) guarantees that the largest organisms will dominate the area 2) ensures a large amount of identical genetic material 3) develops relationships between organisms that are always positive over

Which part of the brain consists of two hemispheres? what are some of the functions is controls?

Which best describes nitrogen fixiation A. Nitrogen fixiation is the process of creating free nitrogen for plants to absorb. B. Nitrogen fixiation is the breakdown of nitrogen in the soil. C.

How does an animal's behavior Aid survival and reproduction