paramecium is a freshwater protozoan. describe the problem it has in controlling the amount of water inside the cell

Which sphere does an astronomer most directly study

The na+-k + atpase is a countertransport antiport carrier, which always requires energy.

What period represents the last 2 million years of geological time

Determination of the number of bacteria present in specimens is called a. quantitative analysis. b. sensitivity testing. c. qualitative analysis. d. staining.

All living things have certain characteristics. How many characteristics are used to describe living things? A. 3 B. 6 C. 9 D. 12

How would the contractile vacuole of a freshwater amoeba respond if the organism was placed in seawater? with more contractions with fewer contractions the contractions would suddenly cease with the same frequency of contractions

Which property of a star is closely related to its temperature? brightness color composition size

Difference between natural selection and evolution

Which two atoms form covalent bond?

Select the characteristics common to both green algae and plants. (probably more than one answer) food is stored as starch leaves conduct photosynthesis roots absorb extra nutrients cell walls are made of cellulose