SSC (Marathi Semi-English) 10th Standard Board Exam [इयत्ता १० वी] - Maharashtra State Board Important Questions for Science and Technology 2

In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.

What is ‘3R’ mantra?

Write ‘3R’ mantra significance

What is recycling of waste?

Differentiate between Toilet soap and Laundry soap.

Choose the correct alternative and rewrite the following: 

Acetic acid ..................

Write short notes based upon the information known to you.

Darwin’s theory of natural selection

Explain the mechanism of hereditary changes.

Survival of fittest : Darwin : : Acquired characters : ..............................

a) Explain in brief - Lamarck’s principle of ‘use or disuse of organs’.
b) Give two examples.
c) What are ‘acquired characters’?

State Darwin’s theory of evolution.

What are the components of the DNA molecule?

Observe the following figure and explain the concept.

State whether the statement is true or false:
Aquatic animals breathe at a slower rate than the terrestrial animals.

Given below are the end products of different reactions involving glucose.

Write the reaction number in front of the following:
(i) Anaerobic reaction =
(ii) Reaction in the human muscles =
(iii) Aerobic respiration =
(iv) Reaction in the plant cells =
(v) Reaction in the liver

Carbon dioxide enters into the leaves through tiny pores present on the surface of the leaf called _________.
(a) chlorophyll
(b) chloroplast
(c) stomata
(d) epidermis

Cellular respiration takes place in
(a) Lysosome
(b) Chlorophyll
(c) Mitochondria
(d) Ribosome

The exchange of respiratory gases in the cells of plants occurs by the process of _______________

(a) Osmosis
(b) Diffusion
(c) Glycolysis
(d) exhalation

Give scientific reason.

Cell division is one of the very important properties of cells and living organisms.

We get ______ energy from carbohydrates.