MCQ
The pollen grain is
- AAn immature male gametophyte
- BA mature male gametophyte
- ✓Partially developed male gametophyte
- DLast stage of male gametophyte
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Reason : Mimicry is a method to acquire body colour blending with the surroundings.
| S.No. | Column-I | Column-II | |
| A. | Amoebiasis | i | Teporema pallidum. |
| B. | Diphtheria | ii | Use only sterilized food and water. |
| C. | Cholera | iii | DPT vaccine. |
| D. | Syphilis | iv | Use oval rehydration therapy. |
$A$. This disorder was first described by Langdon Down $(1866)$.
$B$. Such an individual has overall masculine development. However, the feminine developement is also expressed.
$C$. The affected individual is short statured.
$D$. Physical, psychomotor and mental development is retarded.
$E$. Such individuals are sterile.
Choose the correct answer from the options given below:
