Vocab
A shelled, water-retaining egg that allows reptile, bird, and certain mammal embryos to develop on land
What is an Amniotic egg?
Feathers with hooked and smooth barbules, allowing the barbules to interlock
What are Contour feathers?
These TWO creatures must molt as they grow due to their non-living tissues.
What are reptiles and birds?
Tuataras
What is Rhynchocephalia?
This behavior by the bird allows the hooked barbules to slide freely along smooth barbules and makes the feathers waterproof.
What is preening?
A poison that attacks the red blood cells and blood vessels, destroying circulation
What is a Hemotoxin?
A structure that allows an embryo to be nourished with the mother’s blood supply
What is the Placenta?
This class of animals in chapter 16 is always ectothermic.
What are reptiles?
Lizards
What is Squamata?
You find an egg in your back yard. It is covered in a soft, leathery shell. Is it a reptile or bird egg?
Reptile
A poison that attacks the nervous system, causing blindness, paralysis, or suffocation
What is a Neurotoxin?
The period of time during which an embryo develops before being born
What is Gestation?
A vertebrate has a four-chambered heart, hair, and nourishes its young with its own milk.
What is mammal?
Crocodiles
What is Crocodilia?
Two species of animal are very similar in appearance. The first species gives birth to offspring that have no hair. Their eyes are also closed. The second species gives birth to offspring that have a full coat of hair. Their eyes are also open. Which species has the shorter gestation period?
The first species has the shorter gestation period. The longer the gestation period, the more developed the offspring are at birth. Since the second species gave birth to well-developed offspring, it must have had a long gestation period.
An organism that is internally warmed by a heat-generating metabolic process
What is an Endotherm?
Specialized organs in mammals that produce milk to nourish the young
What are Mammary glands?
A vertebrate has a four-chambered heart, lays amniotic eggs with a lime-containing shell, and it has a light, porous skeleton
What is bird?
Turtles
What is Testudines?
A mammal lives in a cold climate and needs a lot of insulation. Will its guard hair or underhair be significantly thicker than the average mammal’s?
The underhair will be thicker, because the main function of underhair is insulation.
Feathers with smooth barbules but no hooked barbules
What are Down feathers?
Lacking an internal mechanism for regulating body heat
What is ectothermic?
A vertebrate has dry, tough scales, a three-chambered heart with a partial division in the ventricle, and it breathes with lungs
What is reptile?
Name all of the orders of living reptiles
What are Rhynchocephalia, Squamata, Crocodilia and Testudines?
This problem was solved by studying birds' alula and creating a "wing slot."
What is turbulence?