Question

Q3. Correct the following statements
a) digestion of food begin in oesophagus.
b) Hydra has proboscis to capture its food.
c) the removal of undigested food from body is called ingestion.
d) non metal are lustrous.
e) shoddy is the best quality of wool.
f) copper is an example of good insulator of heat.
g) subsoil is rich in humus.​

Answer 1

Answer:

1=yes

2=no

3=yes

4=no

5=no

6=yes

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Answer 2

Answer:

a)Digestion begins in the mouth

b)paralyzing

c)Excretion

d)Non-Lustrous

e)Cotton

f)bad conductor

g)topsoil

Explanation:

a)Digestion begins in the mouth, well before food reaches the stomach. When we see, smell, taste, or even imagine a tasty meal, our salivary glands in front of the ear, under the tongue, and near the lower jaw begin making saliva (spit).

b)Hydra capture their food by paralyzing and killing the food organism by means of nematocysts, which are discharged into the prey. The prey is brought to the mouth (proctostome) by the tentacles, a response that is induced glutathione.

c)Elimination describes removal of undigested food contents and waste products from the body. While most absorption occurs in the small intestines, the large intestine is responsible for the final removal of water that remains after the absorptive process of the small intestines.

d)Non metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.

e)shoddy is the best quality of cotton.

f)No, copper is not a good insulator. It is a good conductor. A conductor allows electricity or heat to pass through the material easily.

g)topsoil is rich in humus