STD 12 - 6. evolution — NEET STD 11 Science — Question

After fast running, man has fast heart beat, slow pulse and shallow breathing, in such conditions he has

A fully grown tadpole larva of frog respires through

Volume of urine is regulated by

Usually chordates have red blood containing red blood corpuscles. The blood is red due to the presence of the following pigment

Secretion of progesterone by corpus luteum is initiated by

Pattern baldness, moustaches and beard in human males are examples of

Choose correct sequence of mechanism of vision
(i) The light rays in visible wavelength focused on the retina through the cornea and lens
(ii) Light induces dissociation of the retinal from opsin resulting in changes in the structure of the opsin
(iii) This causes membrane permeability changes.
(iv) Potential differences are generated in the photoreceptor cells rods and cones
(v) This produces a signal that generates action potentials in the ganglion cells through the bipolar cells.
(vi) These action potentials (impulses) are transmitted by the optic nerves to the visual cortex area of the brain.
(vii) Where the neural impulses are analysed and the image formed on the retina is recognised based on earlier memory and experience.

Elephantiasis (Filariasis) in man is caused by