Which is true regarding the diploid number of chromosomes in a eukaryotic organism?

a.

all eukaryotic organism cells have a single chromosome.

b.

all eukaryotic organism cells have close to 20 pairs of chromosomes.

c.

the number of chromosomes per cell varies widely between eukaryotic organisms.

d.

all eukaryotic organism cells have the same number of chromosomes.

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

The big bang theory suggest that the universe is about - 300 million years old - 4.6 billion years old - 30 billion years old - 13 billion years old

Cells a and b are the same size and shape, but cell a is metabolically quiet and cell b is actively consuming oxygen. oxygen will diffuse more quickly into cell because . b the oxygen molecules inside cell b have a higher kinetic energy b. a its membrane transport proteins will not be saturated c. a the diffusion gradient there is shallowerd. b the diffusion gradient there is steeper