Animal Reproduction

Asexual reproduction - fission

Sea anemone

Paramecium

Planaria

Asexual reproduction - budding

Hydra

Porifera

Planaria

Asexual reproduction - parthenogenesis

Honey bee

rotifers

aphids

daphnia

Meiosis

coral

External fertilization

Internal fertilization

Vertebrate copulatory organs. (a) Clasper of dogfish (Squalus). Glans penis of (b) opossum, (c) ram, (d) bull, (e) short-tailed shrew, (f) man, (g) Echidna.

Internal fertilization

Internal fertilization

collembola

salamander

Sperm competition – mate guarding

Sperm competition – mating plug

mouse

Sperm competition – toxic seminal fluid; sperm displacement

Prolonged copulation

hermaphroditism

simulataneous sequential

ovovivipary