Birds are warm-blooded, lay eggs, have feathers, and can fly. Which of these traits excludes them from the taxonomic class of “mammal?” A.
flight
B.
feathers
C.
egg-laying
D.
warm-blooded

b

Explanation:

The answer is actually B. Feathers

Explanation:

Some mammals that lay eggs are Platypus and Echidnas. This type of group of mammals are called Monotremes, Marsupials, and placental mammals

maritime tropical may be your answer.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.