NEET UG Biology Ecosystem MCQs

5. Orchid living on the tree is an example of ______?

(A)Parasitic    (B)Predetor    (C)Commensalism   (D) Mutualism

6. Population of which of the following will be highest in the foodchain?

(A) Decomposer   (B)Primary Producer   (C)Photosynthetic organism   (D)Secondary consumers

7. Who is food componant of the grazing food chain?

(A)Consumer   (C)Decomposer   (D)Photosynthetic living organism   (D)Photosynthetic consumers

8. System resulting from interaction of all the known living factors and populaton of all the species of a unit area is...

(A) Ecology   (B) Genetics   (C)Science of plants and animal   (D)Ecosystem

9. In which of the following plants are included in any food chain?

(A)Primary Producer   (C)primary comsumer

(B)Primary predator& producer   (D) Primary decomposar

10. Which of the following is the correct statement for food chain?

(A) Every chain formed by nutritional relations , is used to understand energy flow.

(B) Enery componet of the food chain forms trophic level.

(C) Inter- relation amongest different food chain froms food web.

(D) All of the given

11. Which of the following uses maximum energy?

(A) Primary comsumer    (B) Secondary consumer

(C) Decomposer    (D) Primary Producers

12. Through, whoch of the following, enery enters in an ecosyslem?

(A) Herbivores   (B) Producer   (C) Decomposer   (D) Primary producers

13. Why is algae placed in first place of food chain ?

(A) Algae is first to synthesize food.

(B) Algae is first to consume food.

(C) Every living organisam can utilize food.

(D) None of the given.

14. In which of the following wheat eating pegions included ?

(A) Decomposer (B) Primary consumer.

(C) primary producers (D) secondary consumer.

15. Which of the following is placed in upper most (highest) level of ecological pyramids.

(A) Herbivores (B) Carnivors

(C) Primary and Secondary Producers. (D) Primary and Secondary consumer.

16. As we proceed in food chain, bio-mass ____

(A) Remain Same (B) Decreases

(C) Increases (D) Initially same and later keep decreasing.

17. In ecosystem the source of energy is ____

(A) ATP (B) Sun (C) The Green plant (D) Sugar.

18. Who is primary consumer of biotic community ?

(A) Herbivores/ Grazing animal (B) Omnivores

(C) Scavengers (D) Carnivores.

19. In which of the following weeds are placed ?

(A) Primary producers (B) Secondary consumer.

(C) Primary consumer. (D) Decomposer.

20. When does the energy flow start in an ecosystem ?

(A) When material cycle starts

(B) When sun rises

(C) When any living organisam gain food.

(D) When light energy is converted in chemical energy.

21. which of the following option is correct for storage place phosphorus and nitrogen respectively ?

(A) Consumer (B) Parental rock and environment

(C) Environment and producers (D) Environment and parental rock

86. Which of the following is one of the causes of cancer ?

(A) Obesity

(B) Artheros cerosis

(C) Inadcquale of O₂ supply

(D) Hypertension

 

87. Which option is more suitable for x and y ?

X : Animal cells possesses mitochondria.

Y : IN animal cell energy is released when carbohydrates are completely broken .

(A) Both are correct

(B) Both are wrong

(C) If x is correct then only y is correct .

(D) X : correct Y : wrong

 

              X           Y

(A) The earth    The Sun

(B) The Sun      The earth

(C) The Sun      A blotic

(D) All of given