STD 11 - 16. Excretory product and their elimination — NEET STD 11 Science — Question

Cheese is prepared from

Red green colour blindness appears due to

The life begins above which level.

Select the incorrect match

Compositae	-	Basal placentation
Brassicaceae	-	Parietal placentation
Malvaceae	-	Twisted aestivation
Poaceae	-	Vexillary aestivation

Which one of the following have the highest number of species in nature ?

It is excreted in the form of pellet or paste with a minimum loss of water

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.

Ovulation does not occur during pregnancy in the human female because