6. Think and answer.
(a) We prepare a variety of foodstuffs
and dishes at home. Are we then
autotrophic organisms?
(b) Which organisms are greater in
number - autotrophs or heterotrophs ?
Why?
(c) The number of heterotrophs found
in desert regions is smaller. However,
they are found in greater numbers
in the sea. Why is this so?
(d) What
damage harm do
ectoparasitic and endoparasitic
animals cause?
(e) Why is plant food not produced in
any other parts of the plant except
the green ones?
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Answers
Autotrophs are the organisms which are greater in number. It is because heterotrophs are dependant on autotrophs to meet their food requirements. If heterotrophs exceed the number of autotrophs, then all the autotrophs will vanish and so will be the heterotrophs.
Answer:
a) By preparing a variety of foodstuffs and dishes at home, we do not become autotrophic. Autotrophic is a term that is used for organisms that can produce their own food. We humans depend on plants for our food and the products which we get from them are used by us to make a variety of foodstuffs.
b)Autotrophs are the organisms which are greater in number. It is because heterotrophs are dependant on autotrophs to meet their food requirements. If heterotrophs exceed the number of autotrophs, then all the autotrophs will vanish and so will be the heterotrophs.
c)However, in case of a habitat like sea, there are plenty of organisms which are found in region ranging from aquatic plants, to small fishes to big fishes. It is an environment which supports the survival of heterotrophs and thus more heterotrophs are found in this region.
d)Ectoparasites and endoparasites devoid the host of its nutrition. Some of the parasites are known to cause diseases like Ascaris/roundworm which is an endoparasite of intestine causes ascariasis. Another example is of Wuchereria which causes elephantiasis or filariasis.
e)Plant food is produced by a special process known as photosynthesis. ... The green colour of specific parts of plants is due to the presence of chlorophyll pigment present in these chloroplasts. Structures in plants which do not contain chloroplast, do not appear green in colour and are not capable of producing food.
Explanation:
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