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Biogeography multiple choice questions(mcqs) and answers for competitive exams

1 Which one of the following derive their energy only from the Herbivores?
A Omnivores
B Autotrophs
C Carnivores
D Detritivores

Answer: Option [C]

The correct answer is Carnivores. Herbivores possess more energy than carnivores as the consume autotrophs directly. Due to this reason energy transfer from herbivores to carnivores is just 10% of what herbivores have obtained from plants. Moreover, if carnivores outnumbered and consumed all the herbivores, the carnivores will ultimately die of starvation.

2 Which one of the following constitute the third Trophic level of the food chain?
A Omnivores
B Carnivores
C Herbivores
D Autotrophs

Answer: Option [B]

The correct answer is Carnivores. In a food chain, the third trophic level is always occupied by carnivores that feed on herbivores. The various steps in a food chain at which the transfer of food (or energy) takes place are called trophic levels. Plants (producers or autotrophs) occupy the first trophic level, herbivores constitute the second trophic level, carnivores constitute the third trophic level and higher carnivores occupy the fourth trophic level.



3 Which one of the following is one of the Primary Carnivores?
A Catfish
B Duckweed
C Backswimmers
D Snails

Answer: Option [A]

The correct answer is Catfish. A primary carnivore, like a cat, represents a carnivore that will only eat herbivores, or plant eaters, such as a mouse.

4 Which one of the following elements is required in large quantities by plants and animals ?
A Iron
B Molybdenum
C Zinc
D Phosphorus

Answer: Option [D]

The correct answer is Phosphorus. There are two types of nutrients that absorbed by the plants- macronutrient and micronutrient. Macronutrients are the nutrients that absorbed in the large quantity such as potassium, sulphur, calcium, nitrogen, phosphorus, magnesium etc. Whereas the nutrients required in small amount is called as micronutrients such as manganese, boron, cobalt, molybdenum, zinc, iron, copper and iodine.

5 Which one of the following are plant eating animals?
A Autotrophs
B Detritivores
C Herbivores
D Omnivores

Answer: Option [C]

The correct answer is Herbivores. Herbivores only eat plants hence are also called plant-eating animals. Cow, goat, deer and elephants are herbivores.

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