5. Think and answer
(o) 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?
(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 or barm do
ectoparasitic and endoparasitic
animals cause?
(e) Why is plant food not produced in
any other parts of the plant except
the green ones?
Answers
Answer:
(o) we are not autotrophs.
(b) Autotrophs are greater in number than heterotrophs.
(c) Geographical the earts covers 3/4 th of water only 1/4 of land. so naturally the number of organisms will be less.
(d) parasites depend for food, shelter on the host and in return causes diseases to host.
(e) becuses only the green parts of the plants possess chlorophyll pigment with chloroplast that traps sunlight convert it into food by photosynthesis.
Explanation:
(o) autotrophs are the organisms that synthesizes their own by themselves by converting light energy into chemical energy. Cooking is just collecting the food and making dishes. so we are not autotrophs we are purely heterotrophs.
(b) Autotrophs are more in number. It includes cyanobacteria, algae, bryophytes, pteridophytes, gymnosperms and angiosperms. While heterotrophs includes protists, fungi, animalia.
Therefore the number of autotrophs are many when compared to heterotrophs.
(c) Deserts is the aerial environment in which the temperature is very high becoming tough for the autotrophs to survive, Due to high temperature water get evaporated quickly. Hence there are few aututrophs and the heterotrophs depending on the autotrophs will be very less in desert. while the ocean is vast occupying 3/4 of Earth's surface is with variety of organisms of which many of them are heterotrophs.
(d) parasites are the organisms which depend entirely on their host for food shelter and resources. They may be ecto surface parasites and endo inside the cells, tissues of the body of host. They carry disease causing organisms and infect the host leading to dreadful diseases.
(e) The leaves are the parts of plant which are green in colour containing chlorophyll pigment harvesting sunlight and in the presence of carbon-dioxide and water in chloroplast convert into food through a process called photosynthesis.