The total number of a species living in an area is known as a

a. Population

C. Region

b. Biome

d. Group

What does a new moon look like to us on earth?

A difference between bacteria and archaea is a. the makeup of their cell walls. b. whether they have a cell wall. c. size. d. whether they have a nucleus.

They elucidated the structure of DNA in 1953

Which protective covering of the brain provides passageways for cerebrospinal fluid (CSF) to drain into the superior sagittal sinus? a. periosteal part of the dura materb. membranous part of the dura materc. arachnoid materd. pia mater

Which structures are found only in the animal cell?

Looking at a standing human, what is the line that demonstrates the body's bilateral symmetry? a. facing the side and drawing a line up and down the center of the body b. facing the front and drawing a line up and down the center of the body c.

Which is the best physical description of a gene

How many shape forms of viruses are there?

Why are these moths called peppered moths

Small, circular pieces of dna in bacterial cells are known as