Biology 213W - 25-11-24 | Quizlet

Sexual reproduction is better because

raw material for nqatural selection, produces genetic diversity

Sea anemone fission

splits into two or more parts

Hydra budding

a bud develops as an outgrowth

Parthenogenesis produces...

haploid adults that cannot reproduce or diploid adults w/o fertilizaton

Are the offspring of parthenogenesis clones of the parent?

Yes or at least half

Gonands

organ that produces eggs

Fertilization

sperm fuses with egg

External fertilization

fish and amphibians

Internal fertilization

insect, reptiles, birds, mammals

External fertilization requires...

moist habitat because gelatinous coats would dry out

Internal fertilization requires

cooperative behavior for copulation

Pheromones

chemical signals but for other individuals

Hermaphrodites have both male and female sex organs

they exchange sperm

Oviparous

egg laying

Ovoviviparous

producing living young from eggs that hatch within the body

Viviparous

live birth

External fertilization produces...

more eggs

More parental care..

fewer zygotes produced

Breakthroughs in reproduction

internal fertilization, amniotic egg

Amniotic egg

internal reproduction, has a shell to protect the membrane

Cloaca

digestive, reproductive, and excretory system opening

Monotremes

egg laying mammals (platypus)

Marsupial

retain embryo for a short time and complete developemtn in a pouch

Eutherians

placental nourisment in the uterus

Leydig cells

produce testosterone

Sertoli cell

a cell that provides metabolic and mechanical support to developing sperm cells