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"It is possible that a trait is inherited but may not be expressed." Give a suitable example to justify this statement.

Monjur Alahi

"It is possible that a trait is inherited but may not be expressed." Give a suitable example to justify this statement.


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Salim Ahmed Kawsar

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Yes, it is possible that a trait is inherited but may not be expressed.
For example, when pure tall pea plants are crossed with pure dwarf pea plants, only tall pea plants are obtained in F1 generation.

On selfing tall plants of F1, both tall and dwarf plants are obtained in F2 generation in the ratio 3 : 1. Reappearance of the dwarf character, a recessive trait in F2 generation shows that the dwarf trait was present in individuals of F1 but it did not express.

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Give an example each for the mixture having the following characteristics. Suggest a suitable method to separate the

(a) Evaporation or distillation  (b) Distillation  (c) Separation by using separating funnel  (d) Sublimation  (e) Chromatography

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Critically, explain the use of dietary supplements in heavy dose for longer duration. Justify your answer with two suitable examples.

Dietary supplement in heavy dose for longer duration of time is very harmful to our body. It damages some of the internal organs, such as liver and may leads to...

1 Answers 2 views
"Fossils are related to evolution", justify this statement. Give the two ways by which age of the fossils can be estimated?

Preserved traces of living organisms are called fossils. Two ways of determining age of fossils are: (i) Relative-fossils closer to the surface are more recent. (ii) Dating-finding the ratio of different isotopes of...

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"Reuse is better than recycling of materials". Give reason to justify this statement...

Reuse refers to the use of the same material again and again. In reuse of materials, no energy is consumed and the resources are saved. In recycling certain used materials are converted...

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“Evolution and classification of organisms are interlinked.” Give reasons to justify this statement.

Evolution and classification of organisms are interlinked because of following reasons.  █ Different life forms have evolved during the course of evolution. Classification deals with the grouping of these life forms...

1 Answers 2 views
"Bombay is a city of slums and star bungalows -a blend of dream and reality." justify the statement giving any five suitable arguments.

(i) Bombay films have contributed in a big way to produce an image of the city as a blend of dream and reality. (ii) Rich industrialists and film spacious bungalows. (iii) Bombay...

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Critically explain the use of dietary supplements in heavy dose for longer duration. Justify your answer with two suitable examples.

1. Excess calcium in diet for longer time can cause heart diseases/ formation of stones in kidney.  2. Excess iron causes siderosis (vomiting and headache)  3. Vitamin E can cause prostates cancer

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"Indian novelists in the 19th century wrote for a national cause." justify the statement with example.

(i) In Bengal many historical novels were about Marathas and Rajputs which produced a sense of a Pan-India n belonging. (ii) They imagined the nation to be full of adventure, heroism,...

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"There is a pressing need to use renewable energy resources." Justify the statement with suitable arguments.

Need to use renewable energy resources are: (i) The glowing consumption of energy has resulted in the country becoming increasingly dependent on fossil fuels such as coal, oil and gas. (ii)...

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Define Aufbau Principle. Give a Suitable example.

Electrons are filled in an atom according to increasing energies of atomic orbitals. Eg Z=36 eg, is 1s2 ,2s2 ,2p6 ,3s2 ,3p6 ,4s2 ,3d10,4p6 .

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