MCQ
The viruses are known as
- AUnicellular
- BAcellular
- CMulticellular
- ✓Free genes
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$R$ -Loss of biodiversity in a region may lead to lowered resistance to environmental perturbations such as drought
| Column $I$ | Column $II$ |
| $(i)$ Chrysophyte | $(a)$ Gonyaulax |
| $(ii)$ Dinoflagellate | $(b)$ Euglena |
| $(iii)$ Euglenoids | $(c)$ Diatom |
| $(iv)$ Slime moulds | $(d)$ Plasmodium |
$I.$ cotton $II.$ coriander
$III.$ Larkspur
Select the right option
$(1)$ $C_4$ plants do not tolerate higher temperature.
$(2)$ $C_4$ plants show a response to high light intensities
$(3)$ $C_4$ plants lack a process called photorepiration.
$(4)$ Productivity of $C_4$ plants is less than $C_3$ plants.
$(5)$ $C_4$ acid $OAA$ is formed in the mesophyll in cells.
$A.$ Mosses and lichens are the first organisms to colonise a bare rock.
$B.$ Selaginella is a homosporous pteridophyte.
$C.$ Coralloid roots in Cycas have $VAM$.
$D.$ Main plant body in bryophytes is gametophytic, whereas in pteridophytes it is sporophytic.
$E.$ In gymnosperms, male and female gametophytes are present within sporangia located on sporophyte.