10th class Biology unit 7 MCQs
chapter 7 MCQS 10th Class Biology
Man and His Environment:
1. Inter relationship between organisms and environment is called:
a. Ecology
b. Mycology
c. Morphology
d. Physiology
2. A group of organisms of the same species inhabiting a specific geographical area at a particular time is called:
a. Population
b. Species
c. Ecosystem
d. Community
3. All the ecosystems in the world together form the:
a. Community
b. Population
c. Habitat
d. Biosphere
4. Biotic component of an ecosystem is:
a. Air
b. Light
c. Plant
d. Water
5. Which one is not biotic factor?
a. Soil
b. Plants
c. Bacteria
d. Animals
6. An abiotic component of an ecosystem is:
a. Decomposer
b. Producer
c. Light
d. Consumer
7. Which of the following is the abiotic part of the ecosystem?
a. Lion
b. Grass
c. Soil
d. Goat
8. Which one is a tertiary consumer?
a. Wolf
b. Frog
c. Lion
d. Rabbit
9. Decomposers are:
a. Animals
b. Algae
c. Fungi and bacteria
d. Mosses
10. Which animal is a primary consumer?
a. Lion
b. Grasshopper
c. Fox
d. Frog
11. Which one of these is not a tertiary carnivore?
a. Snake
b. Lion
c. Leapord
d. Tiger
12. It is the example of a tertiary consumer:
a. Lion
b. Wolf
c. Frog
d. Snake
13. Which one of the following is a tertiary consumer?
a. Larvae of butterfly
b. Deer
c. Rabbit
d. Owl
14. The smallest level in ecological organization is:
a. Community
b. Population
c. Ecosystem
d. Species
15. Biosphere surrounding the Earth is about:
a. 19 km
b. 17 km
c. 20 km
d. 18 km
16. For all the living things the source of materials is:
a. Air
b. Sun
c. Sea
d. Earth
17. Primary source of energy for all ecosystem is:
a. Fire
b. Electricity
c. Nutrients
d. Sun
18. Basic source of energy for an ecosystem is:
a. Sun
b. Plants
c. Water
d. Animals
19. Charles Elton developed the concept of ecological pyramids in:
a. 1926
b. 1924
c. 1927
d. 1925
20. Naturally found graphite and diamond is:
a. Oxygen
b. Nitrogen
c. Hydrogen
d. Carbon
21. The basic trophic level for all food chains is:
a. Decomposers
b. Producers
c. Reducers
d. Consumers
22. Conversion of nitrates into nitrogen gas is called:
a. Ammonificatio
b. De nitrification
c. Nitrogen fixation
d. Assimilation
23. Formation of nitrites and nitrates from ammonia is called:
a. De nitrification
b. Nitrification
c. Assimilation
d. Ammonification
24. The total amount of living matter in an ecosystem at any time is called:
a. Energy
b. Food web
c. Biomass
d. Food chain
25. size mammals which eat honey are:
a. Badger
b. Rabbit
c. Elephant
d. Camel
26. Mosquito, lice and leech are the examples of:
a. Obligent parasite
b. Ectoparasite
c. Both B and D
d. Endoparasite
27. Which of the following is not carnivore?
a. Pitcher plant
b. Sun dew
c. Venus fly trape
d. Cactus
28. Which relation exists between termite and protozoan is:
a. Commensalisn
b. Mutualism
c. Parasitism
d. Predation
29. All carnivores animals are:
a. Predator
b. Parasite
c. Pathogen
d. Host
30. An example of carnivores plant is:
a. Rose plant
b. Mosses
c. Sundew
d. Ferns
31. The type of symbiosis in which one partner is benefitted while the other is neither benefitted nor harmed is called:
a. Parasitism
b. Mutualism
c. Predation
d. Commensalism
32. The type of symbiosis in which one partner is benefitted while the other is neither benefitted nor harmed is called:
a. Parasitism
b. Commensalism
c. Predation
d. Mutualism
33. The type of symbiosis in which both partners are benefitted and neither is harmed is called:
a. Commensalism
b. Mutualism
c. Parasitism
d. Symbiosis
34. CAn example of exparasite is:
a. Ascaris
b. Plasmodium
c. Mosquito
d. Cusuta
35. Example of Ectoparasite is:
a. Lice
b. Ascaris
c. Plasmodium
d. Entamoeba
36. The amount of carbon dioxide in air is increased since 1880:
a. 40%
b. 20%
c. 50%
d. 30%
38. About 250 years ago, the population of the world was approximately ……… millions:
a. 600
b. 400
c. 700
d. 500
39. R-2 means:
a. Recycle
b. Reuse
c. Reduce
d. Renewable
40. R-3 means:
a. Recycle
b. Less use
c. Refuse
d. Reuse
41. The non renewable resources are:
a. Water
b. Fossil fuels
c. Soil
d. Air
42. Materials which can again be reused are:
a. Paper
b. Plastic
c. Glass
d. All
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