Discuss the role of hybridisation in crop improvement.
Hybridization is the method of mating two organisms from separate species in order to produce an organism that possesses the... View Article
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Compound leaves are found in many ferns. (True or False)
True Explanation A leaf whose blade is divided into two or more distinct leaflets is called compound leaf. Almost all... View Article
Excessive burning of fossil fuels is a major cause of __________.
Excessive burning of fossil fuels is a major cause of Global Warming. What is global warming? Global warming is the... View Article
When heated in air, coal burns and produces mainly ________ gas.
When heated in air, coal burns and produces mainly carbon dioxide gas. When coal is burned, it reacts with the... View Article
Synthetic fibres do not melt on heating. (True or False)
False Synthetic fibres melt on heating. When synthetic fibres are burnt their behaviour is different from that of the natural... View Article
Cotton is a natural polymer. What is its chemical name?
The chemical name of cotton is cellulose. Cotton is a soft fibre that is obtained from cotton plants and grows... View Article
What are the advantages of using CNG and LPG as fuels?
The advantages of using compressed natural gas (CNG) and liquefied petroleum gas (LPG) as fuels are: They can be burnt... View Article
Label a,b,c and d. given in Fig. Give the function of (b)
a) Dorsal fin b) Caudal fin c) Pelvic fin d) Pectoral fin Caudal fin is found at the tip of... View Article
What will happen if platelets were absent in the blood?
Platelets are responsible for clotting of blood. If there are no platelets, the blood would not clot in case of... View Article
What is the significance of the emulsification of fats?
Emulsification is the process of breaking down the fat into smaller globules making it easy for the enzymes to act... View Article
What would happen if green plants disappear from earth?
Green plants are the sources of food and energy for all organisms. If all green plants disappear from the earth,... View Article
Write the modes by which insects affect the crop yield.
Insects have a damaging effect on the crop yield. Some insects cut the plant parts inhibiting their growth while others... View Article
Why do we keep both snake and turtle in the same class?
Both snake and turtle are kept under same class called reptilians. These animals are cold-blooded They have scales and breathe... View Article
What are the functions of the cell wall in plant cells?
A cell wall is defined as a rigid, external layer that is specifically designed to provide structural support and rigidity.... View Article
The black thick liquid with __________ smell is known as coal tar.
The black, thick liquid with an unpleasant smell is known as coal tar. Coal tar is used primarily for the... View Article
Write the importance of synthetic polymers in our life.
Synthetic fibres are important in our life because of multiple uses. Nylon Nylon belongs to the synthetic polymers family and... View Article
The correct sequence of anaerobic respiration in yeast is
Answer: (d) In Yeast cytoplasm Glucose is broken down in anaerobic conditions to produce Pyruvate which is further disintegrated to... View Article
Name two types of animal feed and write their functions.
The two types of animal feed are: Roughage: These are rich in fibre; e.g., cowpea, berseem, etc .It is coarse... View Article
Define (i) Vermicompost (ii) Green manure (iii) Biofertilizer
(i) Vermicompost. It is a manure rich pulverized organic matter and worm castings. Vermicompost is formed by the activity of... View Article
Why are lysosomes also known as “scavengers of the cells”?
Lysosomes are single membrane bound cellular organelles. They possess many hydrolytic enzymes that destroy any foreign material inside the cell... View Article
