quiz Flashcards
is when the eggs are deposited outside the mother’s body after fertilization.
Oviparity
The fertilized eggs are retained within the mother in order to complete their development. The embryos still take all of their nourishment from the egg yolk. The young are thus fully developed when they hatch.
Ovoviviparity
is found in almost all mammals. The young develop within the mother and takes its nourishment directly from their mother’s blood, as opposed to egg yolks.
Viviparity
In most cartilaginous fish most fertilization is _____.
internal
In internal fertilization, the male introduces sperm into the female by means of a modified _______.
pelvic fin
In Amphibians, gametes from the males and females are released through the __________.
cloaca
The shells of reptile eggs are _____, and this allows for better withstanding of environmental conditions.
leathery
As the eggs pass through the ________, the glands secrete the egg whites and the hard shells that distinguish bird eggs from reptilian eggs.
oviduct
Most birds are also _______, meaning that they keep a stable body temperature.
homeotherms
the embryo that develops within the cavity filled with fluid is surrounded by a membrane called an amnion.
amniotic eggs
is an extra-embryonic membrane and develops outside of the body of the embryo.
amnion
_______ in females is the cyclic release of an egg from the ovary.
Ovulation
The period of sexual receptivity
estrus
the reproductive cycle is therefore called
estrous cycle
The most primitive mammals, the monotremes, are __________
oviparous
derives its nutrients from the mother’s blood, since fetal and maternal blood vessels are in close proximity.
fetus
