Ecosystem And Biosphere

31 Most of the red, blue and purple colours of plants are due to a pigment called

32 The seeds of certain plants fail to germinate if they do not pass through the digestive tract of fruit-eating birds. This is due to :

33 The subcellular organelle not bound by a single membrane is :

34 Which one is not found in the composition of plasma membrane?

35 Sucrose content in sugarcane decreases

36 Respiration is :

37 In plants cells,which structure provides a definite shape to the cell and makes it right?

38 Produces a usable form of energy for the cell

39 Which among the following is also called as 'power house of the cell'?

40 Branch of agriculture concerned with the production of crops

41 Lathyrism is caused by excess consumption of.......

42 The study of relation of animals and plants to their surroundings is called ……

43 Potato is a modified form of:

44 Secondary consumers are eaten by larger

45 Which one of the following crops would be preferred for sowing in order to enrich soil with nitrogen?