CBSE
Multiple Choice QuestionsIn terrestrial ecosystem such as forest, maximum energy is found in which trophic level
T1
T2
T3
T4
Enzyme and carbohydrates dominate in the digestive tract of
carnivores
omnivores
parasites
herbivores
When a natural predator (living being) is applied on the other pathogen organism to control them, this process is called
biological control
genetic engineering
artificial control
confusion technique
Which of the following workers are related as ecologist, palaeobotanist and embryologist respectively?
B. Salmi, R. Mishra, P. Maheshwari
R Mishra, B. Sahni, P. Maheshwari
B. Sahni, P. Maheshwari, R Mishra
P. Maheshwari, R Mishra, B. Sahni
Increase in toxic concentration from one trophic level to another trophic level is called
ecological toxification
bio- magnification
bioconcentration
cytological effect
Match column I with column II and select the correct option from the codes given below.
| Column I | Column II |
| A. Commensalism | (i) One inhibited, other unaffected |
| B. Parasitism | (ii) One benefitted, other unaffected |
| C. Mutualism | (iii) Both are benefitted |
| D. Amensalism | (iv) One benefitted, other harmed |
A - (iv), B - (ii), C- (iii), D - (i)
A - (iii), B - (iv), C - (ii), D - (i)
A - (ii), B - (iv), C - (iii), D - (i)
A - (ii), B - (iv), C - (i), D - (iii)
The 10% energy transfer law of food chain was given by
Stanley
Weismann
Lindemann
Tansley
The part of earth in which life exist is known as
Lithosphere
Biosphere
Atmosphere
Hydrosphere
Which of the following is used as bioinsecticide?
Bacillus polymyxa
Cylindrospermum licheniforme
Phytophthora palmivora
Chrysanthemum cinerarifolium
The water logging capacity of garden soil will be determined by measuring the weight of
soil by adding water and humus
water saturated soil then heating the soil till it is dry and then measuring the weight of soil
soil by adding water, biomass and humus
soil from different locations with biomass.
