Why aren't cheek cells all the same shape on the slide?

During his lifetime A Redwood will become larger and more complex. It could be Alive because it displays which sign of life

How many letters does DNA have?

A particular gene can have 2 forms, called alleles. Which statement best describes the difference between the dominant allele and the recessive allele?

What happens to the amount of energy that is used up during photosynthesis? It changes to an equal amount of chemical energy. It changes to a lesser amount of chemical energy. It changes to a higher amount of solar energy.

One property that makes DDT hazardous over the long run is that DDT is A. an insecticide. B. a perfect pesticide. C. subject to biological magnification. D. deadly to herbivores.

What advantage (if any) is there to breeding organisms from closely related species? Explain.

Which is considered a carbon sink

These fossils can be best used to provide information that could be used in a study of

Describe the skeleton of a sponge

Compare the human digestive system and an assemble line in reverse