Please help with the following questions STAT, will rate. Provide complete answe

Question

Please help with the following questions STAT, will rate. Provide complete answers. Thank you Please help with the following questions STAT, will rate. Provide complete answers. Thank you

question To 1.6 Which of the following are synapomorphies of mammals? Hair ? vertebral column Five digits Mammary glands ? Endothermy Placenta 1.67 p Question 11 Which advantages do feathers provide for birds? ? Light insulation for heat conservation Water-tight for water conservation ? Volume for lift Rigid structure to anchor strong muscles for flight

Explanation / Answer

question 10- synapomorphies of the mammals are following:

mammary glands-which produce milk
hair
endothermy as mammals have high metabolic rate

synapomorphy is a character that present in two or more taxa and their common ancestor but absent in original or
a characteristic of 2 or more organism which is inherited exclusively from their ancestor

question11: advantages feathers provide to birds are following:

light insulation for heat conservation there are many kinds of feather on birds . contour feather are those which zipped together for providing a streamlined shape and trap body heat. under contour feather , down feathers lie they do not zipped as they have no tiny hooks. they are excellent for trapping body heat and provide insulation to birds.
vomume to lift feather on birds provide solid surface to wings to push against the air when the wings go downward feather get meshed together and allow to part the air as go upward again.

birds feather are not water proofed. in birds breat bone evolved as anchor for the flight muscles.

question 12:the three main adaptation that allow reptiles to become independent from water are:
amniotic egg as reptiles were the first amniotes. amniotic eggs have fluid filled membrane that is extraembryonic membrane which allows the embryo survive in terrestrial environment.
dry skin it is a key evolution , it allows them to move into dry habitat. it is made up of keratin that prevents internal fluid of reptiles from evaporating
internal fertilization- fertilization is internal. does not require water.

question 13 :
answer 13:it appeared in the ancestors of all tetrapods but was lost in amphibians. tetrapods are classified into 4 classes, amphibia, reptiles, aves and mammals. reptiles, aves and mammals have extraembyonic membrane and lack of larval stages.

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