In prokaryotes, chromatophores are

Some prokaryotes like photosynthetic bacteria and blue-green algae posses small membrane lined chromatophores, which are similar to but chemically simpler than the chlorophyll of plants.

Specialised granules responsible for colouration of cells

Structures responsible for organising the shape of the organism

Incusion bodies lying free inside the cells for carrying out various metabolic activities

The correct Option is "Internal membrane system that may become extensive and complex in photosynthetic bacteria"

Rapid and dramatic increase in shoot length is called

Rapid and dramatic increase in shoot length is called bolting. Gibberellins induce stem elongation in ‘rosette plants’. E.g., cabbage, henane, etc, such plants show retarded internodal growth and profuse leaf development. In these plants, just prior to the reproductive phase, the internodes elongate enormously causing a marked increase in stem height, i.e., bolting.

The correct Option is "Bolting"

If the gene of interest is ligated at Lac-Z gene in pUC8 vector, then

In pUC8 vector, both Lac-Z and ampicillin resistant genes are located at different positions. Recombinants will produce white coloured colonies.

Recombinants will be tetracycline resistant

Non-recombinants will produce black coloured colonies

The correct Option is "Both recombinants and non-recombinants will be ampicillin resistant"

Recombinants will produce red coloured colonies

Which of the following is a bacteriophage?

Viruses inhabiting in bacteria. Bacteriophages is a virus that infects and replicates within bacteria. Bacteriophages are composed of proteins that encapsulate a DNA or RNA genome and may have relatively simple or elaborated structure

The correct Option is "Virus inhabiting in bacteria"

Nitrite is converted to nitrate by

Nitrification is the phenomenon of conversion of ammonium to nitrate. In the first step, the ammonium ions are oxidized to nitrites by Nitrosococcus, Nitrosomonas. The nitrites are changed to nitrate in the second step by Nitrocystis, Nitrobacter.

The correct Option is "Nitrobacter"

The replacement of two kingdom grouping by five kingdom classification was proposed in the year

An American taxonomist, Robert H Whittaker has proposed a five kingdom classification of living organisms in the year 1969.

India’s wheat yield revolution in the 1960s was possible primarily due to

In 1963, ICAR introduced dwarf selections from CIMMYT, including those developed by Norman Borlaug using Norin-10 as the source of dwarfing genes

The correct Option is "Mutations resulting in plant height reduction"

Choose correct statements regarding the flow of sap in xylem? I. Flow is driven by higher concentration of sugar in the vessel elements II. Flow from root to twigs and leaves would be reduced if leaves are removed III. In the morning, sap begins to flow first in the twig then in trunk IV. Rapid flow of water put tissues under pressure much more than atmospheric pressure

Xylem sap is composed of minerals and water and is not driven by higher concentration of sugars, while rapid flow of water does not affect the conducting tissue and only the rate of transpiration is increased

The correct Option is "II and III"

Haptonastic movement is found in

Drosera Shows haptonastic movement.Oxalis Shows photonastic movement, 𝑀𝑖𝑚𝑜𝑠𝑎 𝑝𝑢𝑑𝑖𝑐𝑎 shows seismonastic movement and Cucurbita shows thigmotropic movement.

The correct Option is "Drosera"

Which of the following is not considered as a trace element (micronutrient) in the plant?

The essential elements, which are required in traces (i.e.,) mg/g of dry matter) by the plants are called micronutrients or trace elements. They are six in number Zn, Mn, B, Cu, Mo, and Cl