The organisms, which obtain nutrition from dead and decaying organic matter are called?

A) Saprophytes

B) Parasites

C) Host

D) None of these

Lichens are a symbiotic association of algae sad fungi. Which of the following statements is correct in respect of lichens?

A) Fungus supplies water and minerals to cells of algae.

B) Algae supplies food to the fungus.

C) Fungus supplies water, minerals and food to algae and algae do not supply anything.

D) Both (a) and (b) are correct.

Starch is a kind of

A) carbohydrate

B) fat

C) protein

D) vitamin

DIRECTIONS: Match column I with column II and select the correct answers using the code given below the columns. Column-I Column-II

(A) Nutrition (p) mode of nutrition

(B) Autotrophic (q) Basic unit of structure of all living beings.

(C) Cell (r) Mode of taking food

(D) Nutrients (s) Those components of food that are necessary for our body.

A) (A) → (p), (B) → (q), (C) → (r), (D) → (s)

B) (A) → (q), (B) → (r), (C) → (s), (D) → (p)

C) (A) → (r), (B) → (p), (C) → (q), (D) → (s)

D) (A) → (r), (B) → (s), (C) → (p), (D) → (q)

DIRECTIONS: Read the passage (s) given below and answer the questions that follow. Passage - 4

A plant was kept in a dark room for a week. Its leaves were tested with iodine solution. The test was negative. Why was the test negative?

A) there was no sunlight in the room

B) the leaves were not green in colour

C) the iodine solution was not good

D) there was no water in the pot

DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Plants make their food themselves and are called autotrophs. Reason (R): Human beings and other animals depend on plants for their food.

A) Both A and R are true and R is the correct explanation of A.

B) Both A and R are true but R is not the correct explanation of A.

C) A is true but R is false.

D) A is false but R is true

DIRECTIONS: Read the following two statements carefully and choose the correct options.

(i) Cuscuta is a parasite

(ii) Cuscuta is a yellow tubular structure that can be seen turning around the stem and branches of a tree.

A) Statement (i) is correct while statement (ii) is incorrect.

B) Statement (ii) is correct while statement (i) is incorrect.

C) Both statements are correct.

D) Both statements are incorrect.

Statement: All green plants have chlorophyll pigment Statement: Without chlorophyll, photo-synthesis cannot take place. From the above statements, Anita concluded that the purple colour croton plants in her garden cannot prepare food on its own. Her teacher said this is not true. Why?

A) Croton plants are green but they do not contain chlorophyll

B) Croton plants do not have chlorophyll but can prepare own food

C) Croton plants are purple in colour but have chlorophyll which is hidden

D) Croton plants are purple in colour and do not contain chlorophyll

The bacterium Rhizobium helps the crops to get nitrogen. Select the statement that is incorrect about Rhizobium.

A) Rhizobium converts atmospheric nitrogen into a soluble form that the plants can absorb.

B) Rhizobium can make its own food.

C) Rhizobium lives in the roots of leguminous plants such as gram, peas and moong.

D) Leguminous plants provide food and shelter to Rhizobium.

DIRECTIONS: Read the passage given below and answer the questions that follow.

Passage - 1 The organisms called Fungi secrete digestive juices on dead and decaying matter and convert it into solution. Then they absorb the nutrients from it. Fungal spores are generally present in air. When they land on wet and warm things they germinate and grow. Fungi

A) secrete digestive juices on dead and decaying matter.

B) absorb nutrients in solution form from dead and decaying matter.

C) the mode of nutrition of fungi is called saprotrophic nutrition.

D) All the above are correct

DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) In saprophytic mode of nutrition organisms take the nutrients in solution term form dead and decaying matter. (ii) Fungi is a saprotroph. (iii) Saprotrophs help in recycling of nutrients,

A) Statements (i) and (iii) are incorrect but (ii) is correct.

B) Statements (i) and (ii) are incorrect but (iii) is correct.

C) All statements are correct.

D) All statements are incorrect.

____________________ are structures present in the cells of the leaves, that contain chlorophyll.

Carbon dioxide + water----sun light------>___________+ __________

A ________________ plant kills the plant on which it grows.

After growing a crop like wheat farmers usually grow a crop such as bean, pea to maintain fertility of the soil. This practice is known as _________________________

A relationship between two or more organisms, where all the organisms benefit is called _____________________

Mistletoe depends on other plants for water and nutrients completely.

Algae is mostly found stagnant water bodies and grows on the barks of the trees to obtain food.