Module 16 Flashcards
(31 cards)
Amniotic egg:
A shelled, water-retaining egg that allows reptile, bird, and certain mammal embryos to develop on land.
Neurotoxin:
A poison that attacks the nervous system, causing blindness, paralysis, or suffocation.
Hemotoxin:
A poison that attacks the red blood cells and blood vessels, destroying circulation.
Endothermic:
An organism that is internally warmed by a heat-generating metabolic process.
Down feathers
Feathers with smooth barbules but no hooked barbules
Contour feathers:
Feathers with hooked and smooth barbules, allowing the barbules to interlock.
Placenta:
A structure that allows an embryo to be nourished with the mother’s blood supply.
Gestation:
The period of time during which an embryo develops before being born.
Mammary glands:
Specialized organs in mammals that produce milk to nourish the young.
State the five characteristics that set reptiles apart from other vertebrates.
1) Covered with tough, dry scales
2) Ectothermic
3) Breathe with lungs throughout their lives
4) 3-chambered hearts with a partially divided ventricle
5) they produce amniotic eggs covered with a leathery shell, mast oviparous some oviviparous.
In this module, we studies reptiles, birds, and mammals. For each class, indicate whether they are ectothermic or endothermic.
reptiles-ectothermic
birds + mammals-endothermic
Name the 9 parts o an amniotic egg.
amniotic fluid, embryo, amnion, allantois, chorion, yolk sac, yolk, albumen, and the shell.
State the functions of the yolk, the allantois, and the albumen.
Yolk-to provide nutrients for the developing embryo
allantois-allows the embryo to breathe
albumen-protects the embryo from infections and supplies water and amino acids
Reptiles have a growth-related characteristic in common with the arthropods. What is it?
they have to molt because their body covering isn’t living
What are the 2 most important functions of reptile scales?
they insulate and prevent water loss
Rhynchocephalia, Squamata, Crocodilia, Testudines
a. snakes b. tuataras c. lizards d. tortoises e. alligators f. turtles
put the right reptiles in the right order.
a. snakes-Squamata b. tuataras-Rhynchocephalia c. lizards-Squamata d. tortoises-Testudines
e. alligators-Crocodilia f. turtles-Testudines
State the 6 characteristics that set birds apart from other vertebrates.
1) Endothermic
2) Heart with 4 chambers
3) toothless bill
4) oviparous, laying an amniotic egg that is covered in a lime-containing shell
5) covered with feathers
6) skeleton composed of porous, light weight bones (not a characteristic for all birds)
Do all birds fly?
No
A blood sample comes rom the ventricle o an animal that is either an amphibian or a bird. How can you tell which?
If the oxygen rich blood and oxygen poor blood then it came from an amphibian if it is one or the other it is a birds
Which has a harder shell: the egg of a reptile or the egg of a bird?
the egg off a bird
You see some barbs from a feather. You have no idea whether they came rom a down feather or a contours feather. Looking at the barbs under the microscope, however, you see that there are no hooked barbules. What kind of feather is it?
a down feather
What type of feather (down or contour) is used for flight? What kind is used for insulation?
flight-contour insulation-down
What is a bird actually doing when it is preening?
spreading oil
What is unique about a bird’s method o molting?
it molts in pairs
