Suppose you traveled back in time and located the first animals to have evolved feathers. You found that these animals were tree-dwelling ectotherms, able to run quickly but unable to fly. You also noticed that only males had feathers. Which hypothesis of feather evolution would these data most support? Feathers initially evolved in a role associated with. a) flight.
b) insulation.
c) sexual selection.
d) gliding.

the correct answer is B

Explanation:

This is due to the fact that being ectothermic individuals, their body temperature was very difficult to maintain and therefore very easy to give heat to the environment.

Also today the plumage of birds has a thin layer of essential oils which is what makes them waterproof and water does not penetrate their plumage so as not to cool the interior of their body

answer: glucoamylase presented optimum activity at temperature of 55â°c, and, in the glycosidic bonds from the non-reducing ends of starch, resulting in the production of glucose. source and type of fermentation can affect the enzyme's properties

credit to kalahira

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.