MCQ
Identify $X$ and $Y$ from figure.
$X$ $-$ $Y$
- AReaction centre $-$ pigment molecules
- ✓Pigment molecules $-$ primary acceptor
- CReaction centre $-$ photon
- DPrimary acceptor $-$ reaction center
$X$ $-$ $Y$
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$I.$ improved varieties of the crops
$II.$ Agro-chemicals
$III.$ Better management practices
Choose the correct option.
$(i)$ Lower the taxon, more are the characteristics that the members within the taxon share.
$(ii)$ Order is the assemblage of genera which exhibit a few similar characters.
$(iii)$ $Cat$ and $dog$ are included in the same family Felidae.
$(iv)$ Binomial nomenclature was introduced by Carolus Linnaeus.
| Column$-I$ (Group of bacteria) |
Column$-II$ (Their shape) |
| $a.$ Coccus | $(i)$ Rod-shaped |
| $b.$ Bacillus | $(ii)$ Spherical |
| $c.$ Spirillum | $(iii)$ Spiral |
| $d.$ Vibrium | $(iv)$ Comma-shaped |