Question

D. Give reasons for each of the following.
1. Mangrove plants have breathing roots.
2.
Some plants like rose and lemon have thorns on their stems.
3. Most plants have green leaves.
4. Leaves in cactus are reduced to spines.
5. Most plants have bright flowers.​

Answer 1

Explanation:

1.For this purpose, mangrove species have specialized above ground roots called breathing roots or pneumatophores. In some species, these roots are pencil sized and peg like whereas in some other species they look like a knee. These roots have numerous pores through which oxygen enters into the underground tissues.

2.AS WE KNOW THE PLANT HAVE THORNS FOR TWO PURPOSES 1ST FOR REDUCE WATER SHORTAGE 2ND FOR PROTECT THEMSELVE WITH ANIMALS IN THOS CASE 2ND ONE WILL FIT IT WITH

3.The leaves of most plants are green, because the leaves are full of chemicals that are green. The most important of these chemicals is called “chlorophyll” and it allows plants to make food so they can grow using water, air and light from the sun

4.leaves are reduced to spines in a cactus , so that the water does not get evaporated with the heat of the SUN. 1. They are present in hot deserts which are scarce in water so in order to reduce the loss of water by Transpiration from the surface of the leaves, its leaves are reduced to spines.

5.In order for plants to entice pollinators, they must first offer their favorite foods: nectar and protein. Since most pollinators fly, the colors of a flower must attract them; therefore, the brighter the flower, the more likely it will be visited