Another name for the unicellular organisms that dominated the earth up to the precambrian time is

a. prokaryotes.

b. eukaryotes.

c. cyanobacteria.

d. ediacaran.

Dna is isolated from a virus and found to contain 27% a, 27% t, 23% c and 23% g. the dna is likely to be:

Human hearts have pairs of two types of chambers; the atria (plural for atrium) and the ventricles. Atria are where blood enters the heart and ventricles pump the blood out of the heart.

The tip of the tongue is very sensitive to which taste sensation (s) ? A. Both sweet AND salty B. Sour C. Sweet D. Salty E. Sour

List several causes of biodiversity loss.

When a perfume bottle is opened, some liquid changes to gas and the fragrance spreads around the room. What explains this?

Mechanical energy is defined as the sum of both the potential energy and the kinetic energy of an object.

Gas exchange involves the transport of two respiratory gases, oxygen and carbon dioxide. review how each gas is transported between the atmosphere and the cells of your body by completing this exercise.

What obtains energy nutrients from producers?

Which form and method of using cocaine produces the most intense immediate high? page?

How is a new cell resulting from mitosis like the original