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MODEL PAPER - 5 [2026] — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMODEL PAPER - 5 [2026]5 Marks
Question
i. Explain by giving one example each:
a. Unisexual flowers
b. Bisexual flowers
ii. Name the labelled parts A, B, C and D in the diagram given below.
Image
iii. Pollination may occur without fertilisation but fertilisation will not take place without pollination. Give reason to justify this statement.
✓

Answer

i. Unisexual flowers have either stamens or carpels but not both.
Fg - Papaya and watermelon
Bisexual flowers have both stamens and carpels. Here are some examples of each: eg - Hibiscus and mustard
ii. A - Pollen grain
B - Stigma
C - Pollen tube
D - Female germ cell
iii. Pollination may occur without fertilization but fertilization will not take place without pollination because pollination does not depend on fertilization but fertilization cannot take place without pollination because for fertilization to occur, it requires both male and female gametes.

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