MCQ
Green plants form-
- AFirst trophic level
- BSecond trophic level
- CThird trophic level
- DFood Chain
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$A.$ Periodic abstinence
$B.$ Withdrawal
$C.$ Coitus interruptus
$D.$ Lactational amenorrhoea
$(A)$ Linked genes cause absolute lethality
$(B)$ Persons affected by $PKU$ do not show mental disorder
$(C)$ $F_{2}$ ratio in codominance and incomplete dominance are same
$(D)$ Sex of male Drosophila is dependent on $Y-$chromosome
$I.$ methane
$II.$ carbon dioxide
$III.$ oxygen
$IV.$ ethane
Choose the correct option