- ✓Agnatha
- BGnathostomata
- CProtochordata
- DEuchordata
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Few such steps include
$I.$ ensuring use of disposable needles and syringes
$II.$ free distribution of condoms
$III.$ advocating safe sex
$IV.$ controlling drug abuse
Which of the steps given above are correct?
Choose the appropriate options for the blanks $A$, $B$ and $C$ to complete the given $NCERT$ statement
$(i)$ Queen Elizabeth shows a number of haemophilic descendents.
$(ii)$ Variation in blood group prevalences due to incomplete dominance.
$(iii)$ Drosophila has three pairs of autosomal chromosomes.
$(iv)$ In birds, female is heterozygous.
$Statement 2$: Certain contraceptives are planted under the skin of the upper arm to prevent pregnancy