- AScattered
- BSeries
- CAlternate
- ✓Head parallel
(d) According to fluid mosaic model, the arrangement of lipid molecules in plasma membrane is head parallel. It means head of both lipid layer towards the outside.
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$(i)$ Methanogens are archaebacteria which produce methane in marshy areas.
$(ii)$ Nostoc is a filamentous bluegreen alga which fixes atmospheric nitrogen.
$(iii)$ Chemosynthetic autotrophic bacteria synthesize cellulose from glucose.
$(iv)$ Mycoplasma lack a cell wall and can survive without oxygen.The correct statements are
$(1)$ The meristem which present at the tips of roots and shoots are called apical meristem
$(2)$ Apical meristem are secondary meristem
$(3)$ Intercalary meristem is the meristem that occurs in the mature region of roots and shoots of many plants and appear later than primary meristem :
$(4)$ Fascicular vascular cambium and interfascicular cambium are lateral meristem