Question

if can answer all of these then only answer

Answer 1

4)The main distinctions between premolar and molar teeth are in their size and shape. While a molar has four cusps or points, a premolar has only two. Molars are also significantly larger than their bicuspid neighbors. ... Molars, in contrast, all have at least two roots, with the upper molars typically having three.

3)Digestion. The digestive functions of saliva include moistening food and helping to create a food bolus. ...Saliva contains the enzyme amylase, also called ptyalin, which is capable of breaking down starch into simpler sugars such as maltose and dextrin that can be further broken down in the small intestine

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Answer 2

hey mate ur answers

yes it is possible for human to survive but he will be suffering from disease

_________villi___________

the small finger like projection present on inner surface of small intestine
its function is to absorb the smaller food particle

_________salavia_________

the saliva contains amylase or ptyalin which converts starch into maltose
and
kill germs along with food

_________Molar Premolar______

MOLAR - it is three in num on back part of jaw and. have four cups


Premolar - it is second last part of jaw and have two cups

_________ yellow color part"_______
the yellow Color part is deposition on teeth of bacteria it weaken strength of teeth or enamel

hope it helps