In a sea shore, the benthic animals live in sandy

Due to the absence of free oxygen in the distilled water

In porifera, body has numerous pores, which are absent in coelenterates. Body has a cavity in coelenterates, while it is absent in porifera.

Oviparous animals lay eggs outside their body. As a result, the eggs of these animals are under continuous threat from various environmental factors. On the other hand, in viviparous animals,...

(a) Endothermic animal: Birds such as crows, sparrows, pigeons, cranes, etc. and mammals such as bears, cows, rats, rabbits, etc. are endothermic animals. (b) Ectothermic animal: Fishes such as sharks, amphibians...

Study basic biological process- how gene are regulated, how they affect the normal functions of the body and its development. Transgenic cow, Rosie is the example for the second category.

a. Sandy,  b. Muddy,  c. Rocky

Answer is,  Midnight.

 (a) Breathing mixture is (O2 + He)

(ii) sea to land

(b) convection currents