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A population of 200 fruit flies is in Hardy Weinberg equilibrium. The frequency of the allele (a) 0.4. Calculate the following:
The number of carrier fruit flies.
Concept: Hardy Weinberg’s Principle
The black colour on the beak of finches dominates over the yellow colour. There are 210 individuals with the genotype DD, 245 individuals with the genotype Dd and 45 individuals with the genotype dd. Deduce the frequency of individuals with dominant, heterozygous, and recessive traits.
Concept: Hardy Weinberg’s Principle
An antiviral protein released from infected and dying cells is ______.
Concept: Immunity
Name the antibody which is most effective in allergies.
Concept: Immunity
Give one significant difference between primary lymphoid organs and secondary lymphoid organs. Give one example of each.
Concept: Immunity
A substance that stimulates the production of antibodies is called ______.
Concept: Antibodies
Briefly explain the role of the following in providing defence against infection in the human body:
B-cells
Concept: Antibodies
Briefly explain the role of the following in providing defence against infection in the human body:
T-cells
Concept: Antibodies
What are the vestigial organs?
Concept: The Immune System >> Lymphoid Organs
Give any one example of a vestigial organ in human body.
Concept: The Immune System >> Lymphoid Organs
If a person shows the production of interferons in his body, then he is suffering from ______.
Concept: Human Health >> Interferons
Assertion: Lymphocytes originate and proliferate in primary lymphoid organs.
Reason: Spleen is a secondary lymphoid organ.
Concept: The Immune System >> Lymphoid Organs
Observe the relation between the first two words and then fill in the fourth word.
Histamine: Mast cells :: Antibody: ______.
Concept: Antibodies
Expand the abbreviation MALT.
Concept: The Immune System >> Lymphoid Organs
Mention one significant difference between Parenchyma and Sclerenchyma.
Concept: Methods of Crop Improvement >> Tissue Culture
Mention one significant difference between Symplastic movement and apoplastic movement
Concept: Methods of Crop Improvement >> Tissue Culture
In the following questions/statements has four suggested answers. Rewrite the correct answer
Roots and shoots lengthen through the activity of:
(A) Apical meristem
(B) Vascular Cambium
(C) Lateral meristem
(D) Cork Cambium
Concept: Methods of Crop Improvement >> Tissue Culture
In the following questions/statements has four suggested answers. Rewrite the correct answer
Opening and closing of stomata is due to:
(A) Ca2+
(B) Na+
(C) K+
(D) Cl–
Concept: Methods of Crop Improvement >> Tissue Culture
Give three anatomical differences between a monocot root and a dicot root
Concept: Methods of Crop Improvement >> Tissue Culture
