Why is the sex which puts more energy into their gamete usually the choosy sex?

What is used to keep track of the gamates and possible offsprings combination

Which of these statements is false? a. others may notice a problem with a relationship before the people involved. b. the first sign of a problem with a relationship is a feeling of anger. c. damaged relationships can be repaired. d. even good relationships can be damaged.

What is the next step in the process after a substrate enters the active site of an enzyme