STD 11 - 10. Cell cycle and cell division — NEET STD 11 Science — Question

Meiotic division in zygote takes place in

In Human body the lymphoid tissue also located within the lining of the major tracts. These tracts are:

Apical dominance in higher plants is due to

In an angiospermic plant, endosperm is formed due to fertilization of secondary nucleus but it is absent in some of the seeds viz. pea, bean, phaseolus (moong) etc. It is due to lack of

Which one of the following may require pollinators, but is genetically similar to autogamy ?

Which of the following substrate can enter into the respiration?

Gibberellin is obtained from a

Bryophytes comprise

Which of the following is true for auxin ?
(i) They help to prevent fruit and leaf drop at early stages but promote the abscission of older mature leaves and fruits.
(ii) Auxins shows apical dominance and it applied in tea plantations, hedge-making.
(iii) NAA (naphthalene acetic acid) and 2, 4-D (2, 4-dichlorophenoxyacetic acid) are synthetic auxins.
(iv) Auxins also induce parthenocarpy, e.g., in tomatoes.
(v) 2,4-D, widely used dicotyledonous herbicides.
(vi) 2, 4-D is used to prepare weed-free lawns by gardeners.
(vii) Auxin also controls xylem differentiation and helps in cell division.