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Biology · 2026 · 2 marks
CBSE 2026 · Region 4 · Set 1 · Q17
How do 'implants' act as an effective method of contraception in human females? Mention one advantage of implants over contraceptive pills.
How do 'implants' act as an effective method of contraception in human females ? Mention one advantage of implants over contraceptive pills.
Marking-scheme solution
• Implants work by inhibiting ovulation / inhibiting implantation /changing the
quality of cervical mucus to retard entry of sperms.
• The effective periods are much longer than those of pills.
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CBSE Class 12 Biology past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.