Which one of the following has irregular shape
A. cheek cell
B. guard cell
C. on bion cell
D. epidermal cell

What type of lipids are found in all biological membranes?

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal