MCQ
What is indicated by $'A'$ and $'B'$ in the given diagram?
- A$A$ - Exine, $B$ - Male flower
- B$A$ - Tube nucleus, $B$ - Exine
- ✓$A$ - Stigma, $B$ - Female flower
- D$A$ - Intine, $B$ - Pollen tube
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
| List $I$ | List $II$ |
| $A$. Vasectomy | $I$. Oral method |
| $B$. Coitus interruptus | $II$. Barrier method |
| $C$. Cervical caps | $III$. Surgical method |
| $D$. Saheli | $IV$. Natural method |
Choose the correct answer from the options given below:
$I$. Each cell of sporogenous tissue in anther is capable of giving rise to microspore tetrad.
$II$. The pollen grain represent male gametophyte.
$III$. Pollen grains are usually triangular and $10-15 \mu m$ in diameter.
$IV$. Sporopollenin is one of the most resistance organic material which can be destroyed only by strong acids
and alkali.