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

Which of the following is not a dicot?

Which of the following organic compounds is the main constituent of Lecithin ?

Which of the following steps not involve in the catalytic cycle of an enzyme action ?
(i) First, the substrate binds to the active site of the enzyme, fitting into the active site.
(ii) The binding of the substrate induces the enzyme to alter its shape, fitting more tightly around the substrate.
(iii) Enzyme-substrate complex is long-lived and required energy for dissociation.
(iv) Enzyme breaks the chemical bonds of the substrate and the new enzyme product complex is formed.
(v) The enzyme releases the products of the reaction and the free enzyme is ready to bind to another molecule of the substrate.

One of single internodal branches are found in

Glycolysis is a....

Dormancy of seed is broken by

Butterfly shaped flower with one stranded, two wing-like and two keeled petal belong to

Select the incorrect statement w.r.t. Green Revolution.

Ovules contain many embryo in

Which one of the following statements are correct ?
(i) Brown algae vary in colour from olive green to various shades of brown depending upon the amount of the chlorophyll pigment and fucoxanthin present in them.
(ii) In phacophyceae food is stored as complex carbohydrates, which may be in the form of laminarin and mannitol
(iii) The vegetative cells have a cellulosic wall usually covered on the outside by a gelatinous coating of algin in brown algae.
(iv) In brown algae, the plant body is usually attached to the substratum by a holdfast, and has a stalk, the stipe and leaf like photosynthetic organ-the stipe.
(v) Asexual reproduction in most brown algae is by biflagellate zoospores that are pear-shaped and have two unequal laterally attached flagella.
(vi) Majority of the green algae are marine with greater concentration found in the warmer areas.
(vii) The food is stored as floridean starch in chlorophyceae.
(viii) The algae having major pigment chlorophyll a and d are phacophyceae
(ix) Polysiphonia and porphyra are the example of red algae.
(x) The main plant body of the bryophyte is haploid.
(xi) The sex organs in bryophyte are multicellular.
(xii) The female sex organ called archegonium is flask-shaped in bryophyte and produces a single egg.
(xiii) Species of sphagnum, a moss, provide peat that have long been used as fuel and as packing material for trans-shipment of living material because of their capacity to hold water.
(xiv) Green algae along with lichens are the first organism to colonize rocks and hence are of great ecological importance.
(xv) Asexual reproduction in liverworts takes place by fragmentation of thalli, or by the formation of specialised structures called protonema.
Choose the correct option given below :-