Question

Mention one difference between the following on the basis of what is given in brackets.

(a) Respiration and photosynthesis (gas released).

(b) Light and dark reactions (products formed).

(c) Producers and consumers (mode of nutrition).

(d) Grass and grasshopper (mode of nutrition).

(e) Chlorophyll and chloroplast (part of plant cell).

Answer 1

(a)

Respiration	Photosynthesis
The gas released during respiration is carbon dioxide.	The gas released during photosynthesis is oxygen.

(b)

Light Reaction	Dark Reaction
Hydrogen and oxygen are produced here, along with release of electrons, which converts ADP into ATP.	Glucose is the main product formed during dark reaction.

(c)

Producers	Consumers
Producers show autotrophic mode of nutrition i.e. they are able to produce their own food from basic raw materials. For example: green plants	Consumers show heterotrophic mode of nutrition i.e. they depend directly or indirectly on the producers for their food. For example: Animals

(d)

Grass	Grasshopper
Green grass being a producer is capable of producing its own food by photosynthesis.	Grasshopper is a primary consumer (herbivore) and directly feeds on producers like grass.

(e)

Chlorophyll	Chloroplast
Chlorophyll is the green pigment present in cell organelles called chloroplasts.	Chloroplasts are cell organelles, situated in the cytoplasm of plant cells. They are present mainly in the mesophyll cells and in the guard cells of stomata.