STD 11 - 11. photosynthesis in higher plants — NEET STD 11 Science — Question

Which one of the following statements are correct ?
(i) The living differentiated cells which have lost the capacity to divide can regain the capacity of division under certain conditions. This phenomenon is termed as dedifferentiation.
(ii) Formation of meristems- intrafascicular cambium and cork-cambium from fully differentiated parenchyma cells are the example of dedifferentiation.
(iii) Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called plasticity.
(iv) Plant hormone which is derivative of carotenoids are GA.
(v) The coleoptiles of canary grass responded to unilateral illumination by growing towards the light source.
(vi) Auxin was isolated by F.W.Went from tips of coleorhiza of oat seedlings.
(vii) The "bakane' disease of rice seedlings was caused by a fungal pathogen Gibberella fujikuroi.
(viii) Skoog and Miller crystallized the cytokinesis promoting active substance that they termed as ziatın.
(ix) Inhibitor-B and dormin were proved to be chemically identical and was named ABA.
(x) Auxin was first isolated from human urine.
(xi) NAA and 2,4-D are natural auxins.
Choose the correct option given below :-

In taxonomic hierarchy family comes between

A unipinnate compound leaf can be differentiated from a branch having simple leaves by

Crossing over occurs at

Which of the following statements is incorrect?

Grafting is not possible in monocots because they

Choose the correct one for dicotyledonous stem from given statements.
(i) Epidermis is the outermost protective layer of the stem, covered with a thin layer of cuticle, it may bear trichomes and a few stomata.
(ii) The cells of the endodermis are rich in starch grains and the layer is also referred to as the starch sheath.
(iii) Pericycle is present on the inner side of the endodermis and above the phloem in the form of semi-lunar patches of parenchyma.
(iv) In between the vascular bundles there are a few layers of radially placed parenchymatous cells, which constitute medullary rays.
(v) A large number of vascular bundles are arranged in a ring.
(vi) Vascular bundles are conjoint and closed.

A centrosome is