Organisms may play only one role in an ecosystem.

Dentify the correct sequence of molecules, as a gene goes from coded information in the nucleus, to the product the cell wants to make.

A six sided mineral crystal is a very hard mineral called?

This is the result of fertilization, in the early stages of growth and development

Ovules produced by an entirely green plant contain a rare mutation in a nuclear gene that is involved in chlorophyll synthesis, and the gene encodes a nonfunctional protein.

Which of the following should you avoid doing before opening a bird's cage? A. Putting a net or towel close at hand to recapture the bird if it escapes B. Turning on exhaust fans so the bird doesn't overheat C.

Why type of physical weathering is caused by the expansion of water?

Describe the structures that form the outside of a prokaryotic cell. Tell whether each structure is common to all prokaryotes

What are hormones made from cholesterol called?

How did earth cool down enough to sustain life

Describe the role of environment in obesity.