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Colostrum, the yellowish fluid, secreted by the mother during the initial days of lactation is very essential to impart immunity to newborn infants because it contains:
Given below are two statements: Statement I: Bone marrow is the main lymphoid organ where all blood cells, including lymphocytes, are produced. Statement II: Both bone marrow and thymus provide micro environments for the development and maturation of T-lymphocytes. In the light of the above statements, choose the most appropriate answer from the options given below:
Which one of the following is not a property of cancerous cells, whereas the remaining three are?
Which of the following immune responses is responsible for the rejection of kidney graft?
Common cold differs from pneumonia in that:
The yellowish fluid "colostrum" secreted by mammary glands of the mother during the initial days of lactation has abundant antibodies (IgA) to protect the infant. This type of immunity is called as:
The letter 'T' in T-lymphocyte refers to:
Match the following columns and select the correct option: Column-I (i) Typhoid (ii) Pneumonia (iii) Filariasis (iv) Malaria Column-II (a) Wuchereria (b) Plasmodium (c) Haemophilus (d) Salmonella
Widal test is carried out to test:
Which one of the following statements is correct?
The phenomenon of pleiotropism refers to
Movement and accumulation of ions across a membrane against their concentration gradient can be explained by
Which micronutrient is required for splitting of water molecule during photosynthesis?
Upon exposure to UV radiation, DNA stained with ethidium bromide will show
Among 'The Evil Quartet', which one is considered the most important cause driving extinction of species?
In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are :
Axile placentation is observed in
Which hormone promotes internode/petiole elongation in deep water rice?
Large, colourful, fragrant flowers with nectar are seen in
Given below are two statements : One labelled as Assertion A and the other labelled as Reason R: Assertion A : The first stage of gametophyte in the life cycle of moss is protonema stage. Reason R : Protonema develops directly from spores produced in capsule. In the light of the above statements, choose the most appropriate answer from options given below: