Mod 16 Flashcards
Gestation
The period of time during which an embryo develops before being born
Placenta
A structure that allows an embryo to be nourished with the mother’s blood supply
Endotherm
An organism that is internally warmed by a heat-generating metabolic process
Hemotoxin
A poison that attacks the red blood cells and blood vessels, destroying circulation
Amniotic Egg
A shelled, water-retaining egg that allows reptile, bird, and certain mammal embryos to develop on land
A vertebrate has a 4 chambered heart, lays amniotic eggs with a lime-containing shell, and it has a light, porous skeleton. Is it a reptile, bird, or mammal?
Bird
A vertebrate has a dry, tough scales, three chambered heart, nourishes its young with its own milk Is it a reptile, bird, or mammal?
Reptile
A vertebrate has a 4 chambered heart, hair, nourishes its young with its own milk. Is it a reptile, bird, or mammal?
Mammal
These are the reptile orders that contain currently living reptiles:
Crocodolia
Testudines
Rhynchocephalia
Squamata
What order do they each belong to?
a. Rhynchocephalia - tuataras
b. Squamata - lizards
c. Crocodilia - crocodiles
d. Testudines - turtles
A living vertebrate is endothermic. Is it possible that the vertebrate is a reptile?
no, not possible. Living reptiles are ectothermic
Which kind of feather has hooked barbules: contour feather or down feathers?
contour feathers have hooked barbules
You find an egg in your back yard. It is covered in a soft, leathery shell. is it a reptile egg or a bird egg?
reptile egg found because bird eggs have a hard shell
A bird’s feathers become inflexible because the hooked barbules do not slide easily on the smooth barbules. What should the bird do to fix this problem?
The bird should begin preening.
A mammal lives in a cold climate and needs a lot of insulation. Will its guard hair or under hair be significantly thicker than the average mammal’s?
he underhair will be thicker (main function of underhair is insulation.)
Two species of animal are very similar in appearance. The first species gives birth to offspring that have no a hair. Their eyes are also closed. The second species gives birth to offspring that have a full coat of hair. their eyes are open. Which species has the shorter gestation period?
The first has shorter gestation period. The longer the gestation period the more developed at birth.
