During human evolution the hands became available for use. - Vidyadip

Question

During human evolution the hands became available for use.

✓

Answer

During human evolution, the climate of earth started becoming dry.
This resulted in loss of forest cover.
The apes which were arboreal on the trees thus descended and started walking on land.
The lumbar bones underwent change and the apes started walking upright on the grasslands.
The vertebral column also underwent change. Due to upright posture the forelimbs were freed from locomotion.
The legs started bearing the weight of the body and the hands became available for use.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Give scientific reasons: [2 M]" from P-2 Heredity and Evolution→P-2 Heredity and Evolution — all question types→Science STD 10 question papers→Maharashtra Board STD 10 question papers→Maharashtra Board question paper generator→

Similar questions

Give a Scientific reason.
Tungsten metal is used to make a solenoid-type coil in an electric bulb.

Enzymes obtained by microbial process are mixed with detergents.

Write scientific reason.
The sun appears on the western horizon for some time after sunset.

Write scientific reason.
The color of iodine disappears in the reaction between vegetable oil and tincture iodine.

Metallic character goes on decreasing while going from left to right in a period.

When you enter a warm room after being outside on a frosty early morning, your spectacles ‘steam up’.

Write scientific reason.
Nearsightedness, this defect can be corrected by using spectacles with concave lens.

Write scientific reason.
Presbyopia effect is more common in people over 40 years of age.

The sun is seen on the horizon a little before sunrise.
(OR)
The sun is seen on the horizon for sometime even after sunset.

Nowadays, safer vaccines are being produced.