MCQ
Unicostate venation is called as
- APalmate
- ✓Pinnate
- CReticulate
- DParallel
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$I.$ In gymnosperms, the male and female gametophytes have an independent existence.
$II.$ The multicellular female gametophyte is retained within the megasporangium.
$III.$ The gymnosperms are heterosporous.
Of these statements
| List $I$ (Sub Phases of Prophase $I$) | List $II$ |
| $A.$ Diakinesis | $I.$ Synaptonemal complex formation |
| $B.$ Pachytene | $II.$ Completion of terminalisation of chiasmata |
| $C.$ Zygotene | $III.$ Chromosomes look like thin threads |
| $C.$ Leptotene | $IV.$ Appearance of recombination nodules |
Choose the correct answer from the options given below
| Column $-I$ | Column $-II$ |
| $(1)$ Pollination by water | $(a)$ Grass |
| $(2)$ Pollination by wind | $(b)$ free-nuclear endosperm |
| $(3)$ coconut water | $(c)$ Guava |
| $(4)$ Fleshy fruit | $(d)$ Hydrilla |
| $(e)$ cellular endosperm |
$(i)$ The shape of the cells may vary with the function they perform.
$(ii)$ Human $RBC$ is about $7.0\; mm$ in diameter.
$(iii)$ Cytoplasm is the main area of cellular activities.
$(iv)$ Various chemical reactions occur in cytoplasm to keep the cell in the living state.