STD 12 - 8. microbes in human welfare — NEET STD 11 Science — Question

Choose incorrect for characters given by Mendel.

Character                     Dominant              Recessive

The nerves leading to the central nervous system are called

The osmoreceptors of body are activated by....

Statement I: In Turner's syndrome, one X-chromosome is missing and in Klinefelter's syndrome, the condition is XXY.
Statement II: These can be easily studied by analysis of karyotypes.

When an organ is transplanted and is rejected by the body, the lymphocytes are produced by

Select the wrong statement for platyhelminthes.
(i) These are mostly endoparasites found in animals including human beings.
(ii) Hooks and suckers are present in the parasitic forms.
(iii) Some absorb nutrients from the host directly through their suckers.
(iv) Specialised cells called flame cells help in osmoregulation and excretion
(v) Sexes are separate, fertilisation is internal and development is through many larval stages

Irritability and conductivity are maximum developed in

Stimulation of a muscle fibre by a motor neuron occurs at:

Which one of the following was the contribution of de Vries

Which of the following is absent in frog