Tropical rain forests,grasslands and deserts are known as____.

The grasslands in Asia are known as

The mean net productivity of two biomes are given. Analyse them and answer the following questions. Tropical rain forest - 450 kg/ sq. km Desert - 15 kg/sq. km a. Why does the productivity of deserts become less than that of tropical rain forest ? b. From the above data analyse the importance of plants in the existence of life.

The breathing organ of a fish is known as____.

The breathing organ of a fish is known as____.

How are tropical forests classified ?

Read the given statement and select the correct option. Statement 1: Tropical rainforests are disappearing fastly from developing countries such as India. Statement 2 : No value is attached to these forests because these are poor in biodiversity. (a) Both statement 1 and 2 are correct (b) Statement 1 is correct but statement 2 is incorrect (c) Statement 1 is incorrect but statement 2 is correct (d) Both statement 1 and 2 are incorrect.

Breeding between animals of same breed is known as____

Formation of tropical forests needs mean annual temperature and mean annual precipitation as

In the tropical rainforest, the majority of trees have showy animal-pollinated flowers. In temperate forests the majority of trees are wind pollinated. Which factors best explain these contrasting patterns ? (i) Wind is rare in tropical forests. (ii) Because of high species diversity in the tropics, individuals of trees species are often widely separated making wind an inefficient means of pollen dispersal. (iii) More opportunities for coevolved mutualisms exist in tropical forests because of the high diversity of animal species. (iv) Trees in tropical forests are mostly evergreen and year-round leaf canopies impede pollen dispersal by wind. (v) Flowering in tropical forests occurs over a short period of time when wind is absent. (a) (i) , (ii) and (v) (b) (i),(iii) and (v) (c) (ii), (iii) and (iv) (d) (ii) and (iv)

Which one of the following ecosystem has the highest annual net primary productivity? (i) Temperate deciduous forest (ii) Tropical rain forest (iii) Tropical deciduous forest (iv) Temperate evergreen forest