Question

HARITATISTIK
chemical equation to show the reaction taking place.
Answer question number 3(i)-3(iv) on the basis of your understanding of the following paragraph
and the related studies concepts.
Nastic movements in plants are not directional movements. They are not dependent on stimulus
and are growth mdependent. For example, the leaves of a touch me not plant (Mimosa pudica), fold
up immediately when touched. These kinds of changes occur due to the changes in the amount
of water in the leaves. Depending on the quantity, they either swell up or shrink. Plant hormones
or phytohormones are responsible for the control and coordination of plants. There are different
types of hormones, which affect the growth of a plant. Phytohormones are chemical compounds
which are released by stimulated cells. These hormones are diffused around the plant cells. They
have a role to play in the cell division, cell enlargement, cell differentiation, fruit growth, falling
of leaves, nipening of fruits, ageing of plants etc.
Geoengsm
Plani showing
Thugmotropism
Flower showing
Chemotropism
Plani showing
Hydrotropism
Phototropism
sche Ho
m
e of plant
ZCE
(1) Name the phenonmenon called for the movement in growth of plants?
(ii) What do you mean by Nastic movement ?
(iii) What are the different types of harmones of plants?
Giv) The plant harmone help in the cell'growth at the shoot tips bv elongating the cells and help
in the growth process is :
(a) Auxins
(b) Gibberellins
(c) Cytokinins
(d) Abscisic acid​

Answer 1

Explanation:

You see plants all around you. But, are they of the same size or height? Of course not! You see big trees, medium-sized shrubs, and even plant saplings.  This tells us that plants exhibit some growth changes as well as some movements. This coordination in plants is attributed to the presence of plant hormones. Unlike animals, plants do not have any muscular system or nervous system. But, they are still able to show movement and also coordination. These movements are always controlled and not haphazard. Let us learn more about coordination in plants

Answer 2

Answer:

Explanation:

1. Phototropism is the phenomenon called for the movement in the growth of plants.

2. Nastic movements are the plant movements that occur in response to environmental stimuli but unlike tropic movements, the direction of the response is not dependent on the direction of stimuli.

3. There are two types of movements in plants :

*Nastic Movements   &   *Tropic Movements

4. (a)Auxin