Nutrition in Plants Test - 2

Plants are called autotrophs as they can prepare their own food from simple raw materials by the process of photosynthesis.

Algae are a large group of simple, plant-like organisms which can prepare their own food and hence are classified under autotrophs.

Herbivorous animals consume only plants as their food.

The tiny pores called stomata present on the surface of leaves are surrounded by a pair of guard cells.

Insectivorous plants secrete digestive juices which digest the proteins present in the body of the insect to form simpler nitrogenous compounds like amino acids.

Saprotrophs obtain their nutrition from dead and decaying organic matter. Venus fly-trap is an insectivore which obtains nutrition partly from insects.

Parasitic plants lack chlorophyll and therefore, climb on other plants to obtain nourishment.

Lichens is an association between algae and fungi wherein both these organisms are mutually benefitted from each other.

During photosynthesis, plants make use of carbon dioxide gas and release oxygen gas into the atmosphere. This oxygen is utilised by all living organisms for their survival.

The fertiliser urea provides plant nutrient nitrogen to the soil.