Which of these is not a characteristic of all animals? a) cells have a nucleus b) multicelled c) have hair d) eat other organisms

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

The diagram shows the development of the oocyte and the follicle during the menstrual cycle. identify at which stage in the cycle the hormone levels are at their highest and most active.

What do scientific models predict will happen to earth's temperature if current trends continue unmitigated? a. earth will heat and cool in a natural cycle b. earth will heat up and then return to an ice age c. earth will continue to warm at a rate of 0.25 c per decade d. earth will start to cool at a rate of 0.25 c per decade appex