7. Answer the following in details:
a. Are all plants autotrophs? Justify your answers with examples.
b. How are the leaves of pitcher plant modified to catch insects?
c. How do fungi and algae benefit from each other? What is this relationship called?
d. What is the role of stomach in the digestive process?
e. how does digested food get absorbed ?
Answers
Answer:
(c) all animals. (d) unicellular organisms. Because green plants are capable of making their own food, they are called autotrophs.
Answer:
Haustoria in some plants are
(a) sucking roots
(b) sucking stem
(c) sucking branch
(d) sucking leaves
ANSWER:
(a) sucking roots
Haustoria are special sucking roots that are found in some parasitic plants like dodder.
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Question B.2:
Association of two different organisms in which both are benefited is called
(a) symbiosis
(b) nutrition
(c) saprophytic
(d) parasitic
ANSWER:
(a) symbiosis
Symbiosis is the association of two different organisms in which both are benefited.
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Question B.3:
The green colour pigment in the leaves is called
(a) chlorophyll
(b) chloroplast
(c) anthocyanin
(d) none of these
ANSWER:
(a) chlorophyll
The green-coloured pigment present in leaves is called chlorophyll.
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Question B.4:
Tiny pores found on the lower side of the leaves is called
(a) stomata
(b) guard cell
(c) both of these
(d) none of these
ANSWER:
(a) stomata
Stomata are tiny pores present on the lower side of leaves.
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Question B.5:
Which one of the following is a parasite?
(a) Mushroom
(b) Dodder
(c) Fungi
(d) Pitcher's plant
ANSWER:
(b) Dodder
Dodder (Amarbel) is a plant parasite that derives its food from the host plant with the help of its special sucking roots called haustoria.