This is the correct option as this statement about photorespiration is false. It is favoured by low CO₂ concentration. Carboxylation is favoured by high CO₂ concentration.

A C₄ plant is a plant that cycles carbon dioxide into four-carbon sugar compounds to enter into the Calvin cycle. These plants are very efficient in hot and dry climates.Their optimum temperature for photosynthesis is 30 - 45° C.

This is the correct option. Sedum and Opuntia are CAM plants. In these plants, the mechanism of photosynthesis is similar to C₄ plants but CAM plants do not have Kranz anatomy and two types of chloroplasts. The initial fixation of CO₂ occurs at night and final fixation occurs during day time. This results in conservation of water.

This is the correct option as this is a plant factor that influences photosynthesis. Leaf anatomy influences the rate of diffusion of CO₂ into the mesophyll cells, availability of light, rate of translocation of end products etc. The important anatomical structures influencing them are size, structure, position and frequency of stomata, thickness of epidermis and cuticle, distribution and number of vascular strands, etc.

This is the correct option as statement 'b' is false. The rate of a physiological process is limited at a given time by one and only one deficient factors. These factors can be carbon dioxide concentration, light intensity, temperature, etc.

This is the correct option as Blackman gave the "Law of Limiting Factors" in 1905.

He is best known for showing that light is essential to photosynthesis and thus having discovered photosynthesis.

Starch granule is not a part of the membranous system of the chloroplast.

Chlorophyll a is bright or blue-green in the chromatogram. Chlorophyll b is yellow-green in colour. Carotene is bright yellow in colour.

This is the correct option as this statement is false. Most of the photosynthesis takes place in the blue and red regions of the spectrum.