Solutions 1. Nutrition in Plants - Additional Short Answered questions | Class 7 Science - Toppers Study

1. Nutrition in Plants   

Ques1:- What is the stomata?

Ans:- There are tiny pores present on the surface of the leaves. These pores are surrounded by guard cells. Such pores are called stomata.

Ques2:- Write the function of stomata.

Ans:- The function of stomata

(i) Transportation of gases occurs through the stomata.

(ii) Vaporisation also takes place through it.

Ques3:- Why are algae green in colour? 

Ans:- Due to chlorophyll

Ques4:- What is parasite? 

Ans:- The organism that derives nutrients from another organism without benefiting, it is called parasite. 

Ques5:- What are algae? 

Ans:- Slimy, green patches in ponds or in other stagnant water bodies are observed. These are generally formed by the growth of organisms called algae. 

Ques6:- What is host?

Ans:- Some organisms allow another to live and get nutrient to itself. These organisms are called host. 

Ques7:- Write the type of heterotrophic mode of nutrition.

Ans:-

(i) Parasitic mode of nutrition.

(ii) Saprotrophic mode of nutrition.

Ques8:- Name a plant which takes nutrients as parasitic mode of nutrition.

Ans:- Cuscuta.

Ques9:- Name a insectivorous plant.

Ans:- Pitcher plant.

Ques10:- Name some organisms that intake Saprotrophic mode of nutrition.

Ans:- Bacteria, Fungi and algae etc.

Ques11:- What is symbiotic relationship?

Ans:- Some organisms live together and share shelter and nutrients. This is called symbiotic relationship.

Ques12:- Name the bacteria which convert nitrogen in its soluble form.

Ans:- Rhizobium. 

Ques13:- Name a organism which make a symbiotic relationship. 

Ans:- Lichens. 

Ques14:- Name the bacteria which are found in the roots of gram, peas and other legumes plants. 

Ans:- Rhizobium.

Ques15:- What are cells?

Ans:- The bodies of living organisms are made of tiny units called cells.

Ques16:- What is cell membrane?

Ans:- The cell is enclosed by a thin outer boundary, called the cell membrane.

Ques17:- What is nucleus? 

Ans:- Most cells have a distinct, centrally located spherical structure called the nucleus.

Ques18:- What is cytoplasm?

Ans:- The nucleus is surrounded by a jelly-like substance called cytoplasm.

Ques19:- What is chlorophyll?
Ans:- It is a green pigment found in plants which helps is photosynthesis.