STD 11 - 17. Locomotion and movement — NEET STD 11 Science — Question

Match the Column-I with Column-II:

Column I	Column II
(a) P-wave	(i) Depolarisation of ventricles
(b) QRS complex	(ii) Repolarisation of ventricles
(c) T-wave	(iii) Coronary ischemia
(d) Reduction in the size of T-wave	(iv) Depolarisation of atria
	(v) Repolarisation of atria

Mechanisms of breathing vary among different groups of animals depending mainly on their habitats and levels of organisation, which option contain all correct statements ?
(i) Lower invertebrates like sponges, coelenterates, flatworms, etc., exchange O₂ with CO₂ by simple diffusion over their entire body surface.
(ii) Earthworms use their moist cuticle for exchange O₂ with CO₂.
(iii) Insects have tracheal tubes to transport atmospheric air within the body.
(iv) Special vascularised structures called gills are used by most of the aquatic arthropods and molluscs.
(v) Terrestrial forms use vascularised bags called lungs for the exchange of gases.
(vi) Among vertebrates, fishes use gills whereas reptiles, birds and mammals respire through lungs and also use skin for respiration.

Which one of the following techniques is safest for the detection of cancers?

The seminiferous tubules of the testis are lined by the germinal epithelium consisting of

The nucleus of cancerous cells becomes

A man with normal vision whose father was colourblind marries with women whose father was also colourblind. Suppose their first child is daughter then what are the chances of this child to be colourblind?

Select the correct statement?

Which one of the following factors will not affect the Hardy-Weinberg equilibrium?

Nutrition is sponges is