Figure 14.1  An arctic fox is a complex animal, well adapted to its environment. It…

Pregnancy begins with the fertilization of an egg and continues through to the birth of…

The ovarian and menstrual cycles are regulated by hormones of the hypothalamus, pituitary, and ovaries…

The human male and female reproductive cycles are controlled by the interaction of hormones from…

Gametogenesis, the production of sperm and eggs, involves the process of meiosis. During meiosis, two…

As in all animals, the adaptations for reproduction in humans are complex. They involve specialized…

The process by which an organism develops from a single-celled zygote to a multi-cellular organism…

The fusion of a sperm and an egg is a process called fertilization. This can…

Sexual reproduction is the combination of reproductive cells from two individuals to form genetically unique…

Figure 13.1 Female seahorses produce eggs that are then fertilized by the male. Unlike with…