Answer to Question 1
Answer: Reptiles are cold-blooded and lay eggs to bear young whereas mammals are warm-blooded and bear live young that they tend by suckling. The warm-blooded mammals were able to survive in more diverse habitats than reptiles because they didn't have to rely on external sources to generate energy to move and function.
Answer to Question 2
Answer: The first land animals were lobe-finned fish, which made their way onto land during the Devonian Period. These fish possessed internal sacks that could be filled with air to supplement their respiration through gills. They would also have had fins that were strong enough to move overland.
Mammals posses a number of physiological pathways related to stress. One example is the hypothalamic
Retrograde pyelogram. A contrast medium is injected into the ureter using a cystoscope, and the X-ra
Human infants are like all other placental mammals, except they are born at a less developed state.
The responses of an on-center cell to contrast.
Mammoths – Larger Cenozoic Mammals
0.123 g of a gas occupy a volume of 124 mL at 120. °C and 760. torr. Its molar mass is ...