Lesson4: lab effect of temperature on chemical weathering earth science a unit 5: sculpuring earths surface

When does dna replication(make a copy of itself)?

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.

Which characteristics are typical of a human population in the postindustrial stage?