Give the scientific terms used to represent the following:
(a) Bending of a shoot towards light.
(b) Growing of roots towards the earth.
(c) Growth of a pollen tube towards ovule.
(d) Bending of roots towards water.
(e) Winding of tendril around a support.

Fill in the following blanks: (a) A plant's response to light is called........ (b) A plant's response to gravity is called..... . (c) Plant shoot grows upward in response to....... (d) Plant roots grow downward in response to ....... (e) Tendrils wind around a support in response to ........ (f) Plant roots grow towards.... and in the direction of force of ........ (g) A root of a plant grows downward. This is knows as......... (h) ......is the hormone that causes phototropism in plants (i) The response of leaves to the sunlight is called ...............

Consider the following functions for plants: A. To give support to the plant B. To provide humus C. To store food D. To absorb water and minerals The functions of roots are

Name the mode of heat transfer in each of the following cases :following cases: (a) In a vessel of boiling water. (b) Heat energy teaching us from the sun. (c) A vessel kept on a hot stove becomes hot. (d) Warm breeze from the land flows towards the sea. (e) A spoon kept in a hot tea cup becomes warm.

Which of the following are not tropisms? (i) growing of pollen tube in response to a sugary substance (ii) folding up of leaves of sensitive plant in response to touch (iii) winding of tendril around a support in response to touch (iv) opening up of the leaves of a daisy flower in response to light?

A particle is in linear S.H.M. between two points A and B, 10 cm apart. Take the direction from A to B as the positive direction and give the signs of velocity, acceleration and force on the particle when it is. (a) at the end (A) at the end B, (c) at the mid point of AB going towards A, (d) at 2 cm away from B going towards A, (e) at 3 cm away from A goiing towards B, and (f) at 4 cm away from A going towards A.

The chemical substance P is made and secreted by the meristematic tissue at the tip of stem (or shoot) of a plant. The chemical substance P is responsible for a phenomenon Q in plants in which the stem bends towards a source of light. The same chemical substance P has on opposite effect on the root of a plant. It causes the root of a plant to bend away from the source of light in a process called R. (a) What is the chemical substance P? (b) State whether P prefers to remains in the sunlit side of a stem or in shade. (c) What is the effect of substance P on the rate of growth of (i) a root, and (ii) a stem? (d) What is the name of process (i) Q, and (ii) R? (e) What is the general name of chemical substances like P? Name another substance which belongs to this class of chemical substances.

The climbing organs of plants like tendrils grow towards any suppory which they happen to touch and wind around the support. This is an example of: