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CBSE 10th Standard Science Subject Control and Coordination Ncert Exemplar 2 Mark Questions With Solution 2021

Published on: 26/05/2021

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10, and also provide the detail solution for each and every NCERT Exemplar questions. NCERT Exemplar questions are latest updated question pattern from NCERT, QB365 will helps to get more marks in Exams

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Std: 10th Standard CBSE - Science

chapter: - NCERT Exemplers

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Questions:

Generic 2

5 x 2 = 10

Label the parts of a neuron in the given figure.

In the given figures, (a), (b) and (c), which appears more accurate and why?

Answer the following:
(a) Which hormone is responsible for the changes noticed in females at puberty?
(b) Dwarfism results due to deficiency of which hormone?
(c) Blood sugar level rises due to deficiency of which hormone?
(d) Iodine is necessary for the synthesis of which hormone?

What happens at the synapse between two neurons?

Name the plant hormones responsibility for the following:
(a) Elongation of cells
(b) Growth of stem
(c) Promotion of cell division
(d) Falling of senescent leaves.

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Answers Key:

Generic 2

5 x 2 = 10

(a) Dendrites
(b) Cyton
(c) Axon
(d) Axon terminals

Figure (a) appears more accurate because it is showing positive geotropic movement in roots and negative geotropic movement in stem.

(a) Oestrogen
(b) Growth hormone
(c) Insulin
(d) Thyroxine

Synapse is the small gap between two neurons. At the end of axon, the electrical impulse sets the release of some chemicals, which cross the gap (synapse) and start a similar electrical impulse in the dendrite of the next neuron. Synapse actually acts like a one way valve because the chemical substance is present only at one side of the gap.

(a) Auxin
(b) Giberellin
(c) Cytokinin
(d) Abscissic acid