Reproduction Quizzes

Reproduction is the biological process by which organisms produce new individuals of their own kind. It is a fundamental feature of all known life; each individual organism exists as the result of reproduction. In humans, reproduction involves two distinct processes: meiosis (or reduction division), which produces haploid gametes; and fertilization, which combines them to form a diploid zygote. Female mammals usually bear a single offspring at a time, while other animals often produce large litters in each reproductive cycle.The study of human reproduction focuses on how individuals are created and the physiological and genetic factors that influence fertility and reproductive health. Reproduction is controlled by hormones such as testosterone in men and estrogen in women, both produced by the gonads (ovaries or testes). The main stages of human reproduction are puberty, ovulation, fertilization, pregnancy, childbirth/birth control and menopause.In some plants such as flowering plants there are also sexual processes that involve flowers with male organs (stamens) producing pollen grains containing male gametes (sperm cells) that travel to female organs (carpels) containing female gametes (egg cells). The egg then develops into an embryo inside the plant’s ovary until it matures enough to be released from the flower or fruit for germination elsewhere. Other forms of plant reproduction include vegetative propagation where new plants can be grown from cuttings or from parts of an existing plant such as tubers or bulbs; apomixis where embryos form without fertilization; parthenogenesis where eggs can develop without being fertilized; and spore dispersal in which spores travel through air currents to reproduce elsewhere when they land on suitable substrates. In animals such as mammals, sexual reproduction occurs when two specialized sex cells fuse together forming a diploid cell called a zygote that will then divide repeatedly until it reaches its full developmental potential forming an embryo inside its mother’s body before eventually giving birth to live young either directly or via placenta delivery depending on species type.