STD 11 - 3. Plant kingdom — NEET STD 11 Science — Question

Assertion : Cyclic pathway of photosynthesis first appeared in some eubacterial species.

Reason : Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved

Which of the following organisms is not correctly matched with its particular?

An example of gene therapy is

First land inhabiting plants are

Recombination of genes occur at

The number of individuals of a species in a particular ecosystem at a given time remains constant due to

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.

Richest energy compound in

Along the sea-coast which of the following is least likely to be found