Why did the grouper, parrotfish, and angelfish populations rise? Why did the sea urchins decline? How did all of this affect the algae population? PLEASE HELP!

This is due ! matching pairs of chromosomes from parents are called a. homologous chromosomes b. heterozygous chromosomes c. herterogenes d. homologous bands

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

Ihave made a synthetic cell by placing a solution that is 10% sodium chloride inside a semipermeable membrane through which water can pass but not sodium chloride. if i place this cell into a solution that is 20% sodium chloride what will happen to the size of the cell? will it increase, decrease, or stay the same in size?