Biology for ( Grade 10 )

Auxins are the growth hormones which were first discovered by Charls Darwin. Auxins are the weak organic acids which can promote ...

9.3 (b) Gibberallins : Gibberellins have a unique property of increasing the height of plants but they do not cause curvature. T ...

when Carlos Mille isolated the crystalline substance from degraded DNA material. This substance was named as kinetin. (i) Functi ...

bending. This results in the senescence in the plants. (D) Growth : It promotes transverse expansion but it inhibits longitudina ...

(F) Flowering and seed development : It is known to inhibit the process of flowering, fruit formation and seed development. 9.4 ...

stimulates the thyroid to produce its hormone; in turn the thyroid secretion induces the hypophysis to produce less thyroid stim ...

controls the functioning of thyroid gland. It stimulates thyroid gland to secrete thyroxin. (D) Follicle stimulating hormone (FS ...

is situated in the lower part of the neck and when enlarged it forms goitre. Two hormones secreted by the thyroid gland are : (i ...

9.5 (d) Parathyroid Gland : These are small ovoid pea shaped glands. They lie on the posterior surface of the thyroid gland. Usu ...

development and growth. Adrenal medulla is important in raising defence mechanisms and supplementing sympathetic action in the ...

pituitary gland, it is also known as growth hormone release inhibiting hormone (GHRIH). 9.5 (h) Ovaries : Ovaries secrete three ...

spermatogenesis. 9.6 NERVOUS CO-ORDINATION IN ANIMALS : In animals two kinds of co-ordination -nervous & chemical are presen ...

the ganglia and nerves spreading form the nerve cord. Nervous system of Grass hopper DAILY PRACTIVE PROBLEMS # 9 OBJECTIVE QUEST ...

(C) respiration (D) photosynthesis. A plant bends towards the source of light when exposed to the light on only one side. Which ...

hormone (D) liquid gas mixture Pineapple an be made to flower if off season by (A) zeatin (B) ethylene (C) temperature (D) sho ...

(i) Cerebrum (ii) Meninges (iii) medulla oblongata (iv) Cerebellum [CBSE Delhi 2005] Draw a diagram of nervous system in an ins ...

CONTROL & CO-ORDINATION 10.1 NERVOUS SYSTEM IN HUMAN : The nervous system of human beings consists of central & peripher ...

10.1 (a) Struture : Each neuron consist of a cell body called cyton and a number of branches (nerve fibres) arising from the cyt ...

10.1 (c) Types of Nervous System : (i) Central nervous system : It consists of the brain and the spinal cord. The brain is cover ...

Cerebrum : It is the largest part of the brain. It consists of two cerebral hemispheres joined by a band of nerve fibres called ...