Tutor profile: Baldish K.

Why do raw bread taste sweeter when you eat?

Bread is made up of carbohydrates (Starch). In mouth 30 % of starch is digested into maltose (thus, tastes sweeter) by the enzyme salivary amylase. This is why its always recommended to slowly eat your food so that saliva properly gets mixed with the food and salivary amylase have enough time to digest starch while the food is in mouth.

Why human should prefer vegetarian diet?

Biomagnification is the process in which the concentration of toxic chemicals(pesticide etc. due to polluted environment) increases withe every level of food chain. Food chain always starts with producers i.e. Plants so if we directly depend on plants the concentration of toxic chemicals that reaches to our body is less as compared to non vegetarians. I) Plants -----> Human II) Plants ------>Goat------->Human Note: Concentration increases with food chain level. Thus, The concentration of toxins reaching our body in IInd case will be higher as compared to Ist case.

Why do germ cells are the only cells in human body that undergo meiosis?

Meiosis is the reductional division which results in haploid daughter cells from diploid parent cell. Germ cells undergo meiosis and produce gametes(sperm or egg) which contain haploid chromosomes (23 chromosomes in each gamete) . So that during reproduction when the male and female gametes are fused they produce zygote which contain diploid chromrosome (23 + 23 = 46 chromosome). Zygote further divides mitotically thus maintaining its normal chromosome number.