fourth grade science plants and animals

Human Dependence on Plants and Animals for Food - Of all the living organisms, only plants are autotrophs i.e., they are capable of synthesizing their own food. Animals are heterotrophs i.e. they are incapable of synthesizing their own food. They depend on ..

Plants Animals Cellulose cell wall surrounds the cell membrane Cell wall is absent in animal cells Plastids are present especially a green pigment called chlorophyll Chlorophyll is absent in animal cells Large vacuoles containing cell sap are p..

Nutrition in Plants - All organisms require energy in order to stay alive. Energy is utilised to do the various bodily functions such as breathing, ingesting and digesting food, excreting, reproducing, locomotion, etc. Energy is obtained from food. Thus the process of intake of food is vi..

Animals are heterotrophs i.e. they are incapable of synthesizing their own food. They depend on plants and other animals for food. Man also being a heterotroph, gets his food from plants as well as animals..

In plants, breakdown of substances is much slower than in animals. Hence accumulation of waste is much slower and there are no special organs of excretio..

Excretion in Plants - In plants, breakdown of substances is much slower than in animals. Hence accumulation of waste is much slower and there are no special organs of excretion. Green plants in darkness or plants that do not contain chlorophyll prod..

In order to survive, all living organisms require food. Animals cannot synthesize their own food. They have to depend on ready made food. They obtain food either directly from plants (by eating them) or indirectly (by eating other herbivores). The nutrition can be defined as th..

Production of food Year Milk (Lakh ton) Egg (lakh ton) Egg (Crores) 1970 170 17.56 600 1980 302 24.42 1300 1990 515 32.00 1960 2000 780 56.56 3355 By livestock, we mean all domestic animals like cows, buffaloes, sheep, goats, pigs etc. ..

Every organism whether plant or animal is unique in itself. There is a wide diversity in the flora (plants) and fauna (animals) in the worl..