Which of the following statements about cell-cycle regulation is correct?
a. cyclins are regulatory nucleotides in the cell cycle.
b. cyclin-cdk complexes phosphorylate carbohydrates.
c. a decrease in p27 protein causes a nondividing cell to resume division.
d. protein kinases break down and rebuild the nuclear membrane.
e. cytokinins stimulate growth and wound healing in animal cells.

Match the following terms and definitions. 1. species that are adapted to live in equilibrium at carrying capacity population density 2. population growth that reaches equilibrium and carrying capacity population 3. death rate mortality 4. birth rate k-selected 5. a group of interacting individuals of the same species within the same geographic area natality 6. the number of organisms living in a particular area logistic growth