Biology Quizzes

Marine Ecology MCQs with Answers

Welcome to the Marine Ecology MCQs with Answers. In this post, we have shared Marine Ecology Online Test for different competitive exams. Find practice Marine Ecology Practice Questions with answers in Biology Tests exams here. Each question offers a chance to enhance your knowledge regarding Marine Ecology.

Marine Ecology Online Quiz

By presenting 3 options to choose from, Marine Ecology Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Marine Ecology Questions and Answers and click over the correct answer.

  • Test Name: Marine Ecology MCQ Quiz Practice
  • Type: Quiz Test
  • Total Questions: 40
  • Total Marks: 40
  • Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quizzes. simply click on question and comment below that question. so that we can update the answer in the quiz section.

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Marine Ecology MCQs

Marine Ecology

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1 / 40

What is the primary role of phytoplankton in marine ecosystems?

2 / 40

What is the name for the zone where freshwater meets saltwater in estuarine environments?

3 / 40

What is the primary cause of coral bleaching?

4 / 40

What is the term for the deepest part of the ocean, beyond the continental shelf?

5 / 40

What is the main impact of ocean acidification on marine organisms?

6 / 40

Which marine ecosystem is characterized by high biodiversity and protects coastlines from erosion?

7 / 40

What is the name for the phenomenon where nutrients are transported vertically in the water column?

8 / 40

Which factor is a primary determinant of the distribution of marine organisms?

9 / 40

Which factor is a major threat to coral reefs worldwide?

10 / 40

Which term describes a marine organism's movement with ocean currents?

11 / 40

What is the primary function of the lateral line system in fish?

12 / 40

Which organism forms the base of the food chain in deep-sea hydrothermal vent ecosystems?

13 / 40

Which marine mammal is known for its long migrations between breeding and feeding grounds?

14 / 40

Which marine organism is known as a keystone species due to its critical role in maintaining ecosystem structure?

15 / 40

Which marine zone is characterized by complete darkness and near-freezing temperatures?

16 / 40

What is the main source of energy for deep-sea hydrothermal vent ecosystems?

17 / 40

Which factor is a primary reason for the decline in global fish stocks?

18 / 40

Which factor contributes to the formation of ocean gyres?

19 / 40

What is the process by which marine organisms convert sunlight into chemical energy?

20 / 40

What is the term for a large area of sea partially enclosed by land?

21 / 40

What is the primary cause of marine dead zones?

22 / 40

What is the term for the zone where freshwater meets saltwater in estuarine environments?

23 / 40

What is an estuary?

24 / 40

Which zone of the ocean receives the most sunlight and supports the highest primary productivity?

25 / 40

What is the role of sea grasses in marine ecosystems?

26 / 40

Which organism plays a crucial role in nutrient recycling in marine ecosystems?

27 / 40

Which marine habitat is characterized by high biodiversity and supports many juvenile fish?

28 / 40

Which marine organism is responsible for converting atmospheric nitrogen into ammonia?

29 / 40

Which marine organism is known for its ability to produce bioluminescence?

30 / 40

What is the term for the seasonal reversal of ocean currents and winds in the tropical Pacific Ocean?

31 / 40

What is the name for the phenomenon where nutrients from deep waters rise to the surface, enhancing productivity?

32 / 40

What is the term for the region of the ocean beyond the continental shelf?

33 / 40

Which factor contributes to the formation of ocean gyres?

34 / 40

What is the role of mangrove forests in coastal ecosystems?

35 / 40

Which organism builds calcium carbonate skeletons that form coral reefs?

36 / 40

What is the main impact of ocean acidification on marine organisms?

37 / 40

Which organism is responsible for converting nitrate into nitrogen gas in marine ecosystems?

38 / 40

What is the main threat to marine turtles during their nesting season?

39 / 40

Which marine organism has a mutualistic relationship with coral polyps?

40 / 40

Which process describes the movement of nutrients through different trophic levels in a marine ecosystem?

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