STD 11 - 2. Biology classification — NEET STD 11 Science — Question

Which one of the following pairs of organisms are exotic species introduced in India?

Ginger is a stem which can be differentiated from root because it

Choose true statement:
(i) Flora, manuals, monographs and catalogues are some other means of recording descriptions
(ii) Flora is useful in providing information for identification of names of species found in an area
(iii) Flora provides the index to the plant species found in a particular area
(iv) Manuals contain the actual account of habitat and distribution of plants of a given area
(v) Monographs contain information of many taxon

Select the wrong statement for mosses.
(i) Gametophyte consists of protonema stage and leafy stage.
(ii) Leafy stage is creeping, green, branched and frequently filamentous stage.
(iii) Protonema develops from the leafy stage as a lateral bud.
(iv) Leafy stage consist of axes which attached to the soil through multicellular and branched rhizoids.
(v) Axes bearing spirally arranged leaves and sex organs are produced at the apex of the leafy shoots

Which of the following hormone is weak organic acid having unsaturated ring structures and derived from amino acid?

What causes a green plant exposed to the light, on only one side, to bend towards the source of light as it grows?

The hormone involved in metabolism of food material in cereal grain during germination, is

The pyramid of energy is the best representation of an ecosystem because it indicates

Select the option which is not correct with respect to enzyme action.