STD 12 - 13. biodiversity and conservation — NEET STD 11 Science — Question

$(i)$ Most of them are fresh water organisms found in standing water.

$(ii)$ They have a protein rich layer (called pellicle) which makes their body flexible.

$(iii)$ They have two flagella, a short and a long one.

$(iv)$ Though they are photosynthetic in the presence of sunlight, but in the absence of sunlight they behave like heterotrophs by predating on other smaller organisms. Identify the correct group on the basis of these characters.

$(i)$ It is a membrane bound space found in the cytoplasm.

$(ii)$ It is bound by a single membrane called tonoplast.

$(iii)$ It contains water, sap, excretory products and other materials not useful to the cell.

$(iv)$ It has higher concentration of sap than the cytoplasm.

$‘A’ $                                        $ ‘B’$

$(1) $ Auxin                        $(I)$ Ripening and maturity of fruits

$(2)$Gibberellin                 $(II)$Differentiation of xylem elements

$(3) $ Cytokinin                  $(III)$ Prevention of genetic and physiological dwarfism

$(4) $ Ethylene                   $(IV)$  Found from tumour tissue of tobacco

 $(1)$     $(2)$     $(3)$     $(4)$