The correct answer is [A] Both A and R are true, and R is the correct explanation of A.The father contributes either an X or Y chromosome. If the child inherits X from father, it becomes XX (girl), and ...
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The correct answer is [C] Lead storage battery manufacturing factories near A and soaps and detergents factories near B.Lead storage batteries release acidic waste, making river A acidic. Soaps and detergents factories release basic waste, making river B basic ...
The correct answer is [C] It is used as a refrigerant and in fire extinguishers.That statement is incorrect because ozone is not used as a refrigerant or in fire extinguishers. Instead, CFCs are used as refrigerants and are harmful ...
The correct answer is [D] 100% tall with round seeds.Here, tallness (T) and round seeds (R) are dominant traits. Crossing TTRR with ttrr gives all F₁ offspring as TtRr, which are tall and round since dominant characters express themselves. class ...
The correct answer is [A] Oestrogen.Oestrogen is the female sex hormone secreted by ovaries. It regulates the menstrual cycle and prepares the uterus for pregnancy. Lack of oestrogen causes irregularity, so doctors prescribe hormonal tablets to balance it. class 10 ...