Lakhmir Singh and Manjit Kaur Solutions for Chapter: Nutrition in Plants, Exercise 5: Questions Based on High Order Thinking Skills (HOTS)

The plant X is found in abundance in desert areas which get meagre rainfall. The modified leaves of this plant can reduce the loss of water from this plant by transpiration. This plant has long roots which go deep into the soil so as to obtain water.

Which part/parts of this plant take part in photosynthesis ?

The lamina of the leaf of a plant P is modified into a hollow tube. The leaf apex forms a kind of lid which can open or close the mouth of a hollow tube. When an organism Q falls in the hollow tube, the lid closes automatically, killing the organism. The walls of hollow tube secrete digestive juices, which digest the complex substances R present in the body of the organism to form simpler substances S. These simpler substances are then absorbed by the walls of the hollow tube and used by the plant P.

What could the complex substances R be ?

The lamina of the leaf of a plant P is modified into a hollow tube. The leaf apex forms a kind of lid which can open or close the mouth of a hollow tube. When an organism Q falls in the hollow tube, the lid closes automatically, killing the organism. The walls of hollow tube secrete digestive juices, which digest the complex substances R present in the body of the organism to form simpler substances S. These simpler substances are then absorbed by the walls of the hollow tube and used by the plant P.

Name the simpler substances S.

The lamina of the leaf of a plant P is modified into a hollow tube. The leaf apex forms a kind of lid which can open or close the mouth of a hollow tube. When an organism Q falls in the hollow tube, the lid closes automatically, killing the organism. The walls of hollow tube secrete digestive juices, which digest the complex substances R present in the body of the organism to form simpler substances S. These simpler substances are then absorbed by the walls of the hollow tube and used by the plant P.

What is the general name of plants like P? (Insectivorous plants/ Parasitic plant/ Symbiotic plants)

Two different species of plants X and Y live together as if they are parts of the same plant Z. The plant X is an autotroph, whereas plant Y is a saprophyte. The plant Y holds the cells of X in its mat of web-like hyphae and supplies water and minerals to cells of plant X. The plant X makes food by photosynthesis and shares it with plant Y.
What could plants (i) X (ii) Y, and (iii) Z be?
 

Two different species of plants X and Y live together as if they are parts of the same plant Z. The plant X is an autotroph whereas plant Y is a saprophyte. The plant Y holds the cells of X in its mat of web-like hyphae and supplies water and minerals to cells of plant X. The plant X makes food by photosynthesis and shares it with plant Y.

Which of the two plants, X or Y, is green in colour?

Two different species of plants X and Y live together as if they are parts of the same plant Z. The plant X is an autotroph, whereas plant Y is a saprophyte. The plant Y holds the cells of X in its mat of web-like hyphae and supplies water and minerals to cells of plant X. The plant X makes food by photosynthesis and shares it with plant Y.
What is the relationship exhibited by plants X and Y known as (answer in one word)?

Two different species of plants X and Y live together as if they are parts of the same plant Z. The plant X is an autotroph whereas plant Y is a saprophyte. The plant Y holds the cells of X in its mat of web-like hyphae and supplies water and minerals to cells of plant X. The plant X makes food by photosynthesis and shares it with plant Y.

The other example of this type of relationship where it includes a bacteria and a vegetable plant is Rhizobium bacteria and Leguminous plants/Lactobacilli bacteria and dicot plants. (Choose the right answer and write in the box given below)