Why does meiosis produce cells with half the chromosomes? A. It is faster to produce gametes with fewer chromosomes.
O
B. A gamete needs only half the number of chromosomes because
two gametes join together.
C. It makes the gametes easier to move around in the organism.
O
D. Most of the chromosomes are not necessary to keep an organism
alive.

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.

7. describe two strategies that parents can use to cope with stress. 8. describe the three types of childcare available to families. 9. what can parents do to be more involved in their children's education at home and at school? 10. which factors should a parent consider when choosing a childcare option?