Question

12 Give the difference between milk teeth and permanent teeth?
13 Explain the role of small intestine in the process of digestion?
14 Describe autotrophic and heterotrophic nutrition in detail?
.15 Explain the following (any 2)
Saprophytes and
(ii) parasites​

Answer 1

1 no.

As humans, we have two sets of teeth that erupt during our lifetime – the first set is called as milk teeth, primary teeth or baby teeth and they start erupting when we are 6 months old and the next set of teeth, called permanent teeth, begin erupting as we turn 6 years old.

2 no.

The small intestine carries out most of the digestive process, absorbing almost all of the nutrients you get from foods into your bloodstream. The walls of the small intestine make digestive juices, or enzymes, that work together with enzymes from the liver and pancreas to do this.

3 no.

In autotrophic nutrition, the organisms prepare their own food. This type of nutrition is seen in plants where they prepare their food by the process of photosynthesis. On the contrary, heterotrophic nutrition is observed in organisms that depend upon other organisms for food.

4no.

Saprotrophs secrete digestive juices onto dead and decaying matter to dissolve it and then absorb nutrients from it. Fungi are saprotrophs. Rhizopus, asperigillus, mushrooms are some of the examples of saprotrophs. These are organisms grow and depend on dead and decaying matter.

living thing (as a flea, worm, or fungus) that lives in or on another living thing and gets food and sometimes shelter from it and usually causes harm to it. 2 : a person who lives at the expense of another. parasite. noun.