Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
11 Cards in this Set
- Front
- Back
|
what was unique about tetrapods?
|
they had 4 limbs and moved onto land
|
|
|
what are some examples tetrapods?
|
amphibians mammals, trutles, crocs, dinos, birds
|
|
|
when was the first evidence of the amniotic egg?
|
in the carboniferous era
|
|
|
what are the two basil mammals?
|
-echidna spiny anteater
-duck billed platypus |
|
|
what is a placenta?do all mammals have a placenta?
|
-a structure that supports gas, waste and nutrient exchange between the embryo and the mother, has highly vascular tissue and highly grandular(directly secretes hormones)
-no |
|
|
what can the amniotic fluid do?
|
tell the sex and if any defects of the baby
|
|
|
what is the difference between endothermy and ectothermy?
|
endo=produce heat internally to regulate body temp(very constant body temp)
ecto=do not produce sufficient heat to regulate body temp(variable body temp) |
|
|
where do animals withe ectothemy need to live in order to survive?where cant they live and why?
|
-in warm places
-in cold times and places they need warmth in order to survive |
|
|
what are the benefits of endothermy?what are they benefits of ectothermy?
|
-can go everywhere,allows animals to invade cold places,can be active at many diff times,and all enzymes can be at perfect maxation of activity
-great lower E strategy, great fro variable food supplies/periodic food supplies - |
|
|
what is a major drawback to endothermy?
|
reqs a huge amount of energy have to constantly work and produce heat
|
|
|
are dinos endo or ecto thermic?
|
controversy
-have lungs but so do crocs -have 4chamber heart but so do crocs -have rapid bone growth crocs today dont but the extinct ones did conclusion:flying dinos mostly enothermy so most likely endothermy |
