Autotrophs and Heterotrophs

Q.

What do you mean by nutrition?

Q.

Question 5
Show with the help of a sketch that the plants are the ultimate source of food.

Q.

Mode of nutrition in fungi is:

1. Parasitic
2. Heterotrophic
3. Saprophytic
4. Autotrophic

Q. Which of the following plant has both autotrophic and heterotrophic mode of nutrition?

1. Pitcher plant
2. Lichens
3. Cuscuta
4. Cactus

Q.

Deep in the ocean, sunlight can hardly reach, yet there are plants such as brown and red algae found here. How they are able to synthesise their own food?

Q.

Question 10 (ii)
Mark ‘T’ if the statement is true and ‘F’ if it is false:
(ii) Plants which synthesise their food themselves are called saprotrophs.

Q.

Green plants are called _________________ since they synthesise their own food.

Q.

Question 15
Sunlight, chlorophyll, carbon dioxide, water and minerals are raw materials essential for photosynthesis. Do you know where they are available? Fill in the blanks with the appropriate raw materials.

(a) Available in the plant : ___

(b) Available in the soil : ___, ___

(c) Available in the air : ___

(d) Available during day :___

Q.

Do you find that all living beings need the same kind of food?

Q.

Name the type of nutrition found in the following organism:

Mushroom

Q.

Grooming is a term associated with

1. problem solving

2. time management

3. neat and clean appearance

4. all of these

Q.

Facultative saprophyte is

1. Always a saprophyte

2. A parasite which can live as a saprophyte

3. Always a parasite

4. May acquire parasitic mode of life

Q.

Are some green plants also heterotrophic in nature?Give examples.

Q.

The process of taking or consuming and utilizing food is called ______.

Q.

Question 17
Match the organisms given in Column I with their mode of nutrition given in Column II.

$\begin{array}{cc}& \\ ColumnI& ColumnII\\ \left(a\right)Mangotree& \left(i\right)Insectivorousplant\\ \left(b\right)Mushroom& \left(ii\right)Heterotroph\\ \left(c\right)Pitcherplant& \left(iii\right)Autotroph\\ \left(d\right)Cuscuta& \left(iv\right)Saprophyte\\ \left(e\right)Elephant& \left(v\right)Parasitic\end{array}$

Q.

Question 21
Can you give me a name? Solve each of the following riddles by writing the name of the organism and its mode of nutrition. One riddle is solved to help you.

(a) I am tall but I cannot move. I am green and can prepare my own food. tree, autotroph
(b) I live in water; people keep me in an aquarium and feed me. __, __
(c) I am small and I can fly. I disturb your sleep, bite you and suck your blood which is my food. __, __
(d) I am white and soft. I grow well in the rainy season. Children pluck me from the ground and admire me. I absorb nutrients from decomposed dead parts of plants and animals in the soil. __, __

Q. Which of the following is not an external factor necessary for photosynthesis to occur?

1. Sunlight
2. Carbon dioxide
3. Chlorophyll
4. Temperature

Q.

Question 6 (a)
Fill in the blanks:
a) Green plants are called __ since they synthesise their own food.

Q.

___can prepare their own food by photosynthesis.

1. Lichens
2. Cuscuta

3. Amoeba

4. Algae

Q.

Question 18
Wild animals like tiger, wolf, lion and leopard do not eat plants. Does this mean that they can survive without plants? Can you provide a suitable explanation?

Q.

Plants which have chlorophyll can make their own food. This mode of nutrition is called_____________.

1. Heterotrophic

2. Autotrophic

3. Holozoic

4. Saprophytic

Q.

The survival of all living organisms is dependent on each other.

1. True
2. False

Q. All meat is grass . justify

Q.

What are saprotrophs

Q.

Question 7 (ii)
Name the following:
(ii) A plant that has both autotrophic and heterotrophic mode of nutrition.

Q. Identify the animals that are indirectly dependent on plants for food.

1. Lion
2. Tiger
3. Cow
4. Snake
5. Goat
6. Man
7. Cheetah
8. Jaguar

Q.

Question 20
Spot as many organisms as possible in the puzzle given as Figure 1.2 by encircling them as shown. Write the names on a sheet of paper and categorise them into autotrophs and heterotrophs. Classify the heterotrophs into herbivores, carnivores, omnivores and saprophytes.

Q.

Man is ______________ in nutrition.

Q. The autotrophic mode of nutrition requires

1. Carbon dioxide
2. Chlorophyll
3. Sunlight
4. All of the above

Q. The ultimate source of energy for all living things is ________.

1. algae
2. starch
3. plants
4. sun