reproduction by a single parent which produces offspring that are genetically identical to the parent
splitting in half of a one-celled organism. Examples: bacteria, amoeba, paramecium, and euglena
asexual reproduction in animals in which a new organism is produced by means of an outgrowth that breaks off from the parent's body wall. Examples: hydra, anemones, and fungi such as yeast
process in which paramecia and some prokaryotes exchange genetic material. may occur across a bridge of cytoplasm .
Females of some species produce eggs that develop without being fertilized. Examples: aphids, bees, ants
haploid gametes (egg and sperm formed by meiosis) from two parents unite to form diploid zygote. may increase genetic diversity.
have both male and female organs
Egg fertilized outside the female's body. Embryo develops outside the female's body. Requires water and large numbers of eggs and sperm.
Decreased chance of fertilization.
Egg fertilized inside the female's body. Embryo develops inside the female's body. Requires specialized organs and mating rituals
Increased chance of fertilization with smaller number of gametes.
embryo develops in egg outside parent's body
embryo develops in egg inside mother's body; rely on yolk
Viviparous - embryo
process of changes in shape and form of a larva into an adult
gradual growth of an arthropod that involves change in size, but not form
egg, larva, pupa, adult
external sac which holds the testes. The scrotum helps maintain a temperature which is 1-3o C lower than body temperature.
produce sperm and the hormone testosterone. They are made up of seminiferous tubules (site of sperm production)
site of sperm maturation and storage; tails develop here.
passageway for sperm from the testes to the urethra. Collects fluids from 3 different glands to produce seminal fluids (fluids + sperm = semen)
produces fluid with sugar (fructose) to give sperm energy
adds more fluid to nourish sperm
Bulbourethral (Cowper's )gland
secretes fluid into urethra for lubrication and acid neutralization
passageway for urine and semen to exit the body; starts at the bladder and travels out through the penis
external organ which deposits semen into the female
or Maturation. is signaled by the hormone FSH which stimulates the testes to produce testosterone.
Shoulders broaden, Larynx enlarges, Pubic hair grows, Facial hair grows, Muscles develop
produce the hormones estrogen and progesterone. They also contain follicles that mature into ova (eggs).
(oviducts) are the passageway from the ovary to the uterus. Fertilization usually takes place here. Cilia line the oviduct to help sweep the ovum to the uterus.
(womb) muscular organ that develops a lining that will nourish a fertilize egg. This is the structure in which a fetus will develop.
opening between the uterus and vagina.
(birth canal) location where sperm are deposited, and passage for baby during normal birth.
Widening of the hips,Development of breasts, Maturation of the reproductive system, Growth of pubic hair, Beginning of the menstrual cycle
follicle stimulating hormone