MARINE ECOLOGY EXAMINATION QUESTIONS AND CORRECT ANSWER WITH EXPLANATION GRADED A+ STUDY GUIDE

MARINE ECOLOGY EXAMINATION QUESTIONS AND
CORRECT ANSWER WITH EXPLANATION GRADED A+
STUDY GUIDE SOUTHERN NEW HAMPSHIRE UNIVERSITY
1. Marine ecology is the study of:
A. Ocean organisms and their environment
B. Soil organisms only
C. Air pollution only
D. Forest ecosystems only
Answer: A
Rationale: It focuses on marine life and ocean systems.

2. Marine ecosystems include:
A. Oceans, seas, estuaries
B. Deserts only
C. Mountains only
D. Cities only
Answer: A
Rationale: All saltwater environments.

3. Salinity refers to:
A. Salt concentration in water
B. Water temperature
C. Oxygen level
D. Wind speed
Answer: A
Rationale: Amount of dissolved salts.

4. The photic zone is:
A. Sunlight-penetrated ocean layer
B. Deep ocean floor
C. Coldest ocean layer
D. Coastal land
Answer: A
Rationale: Light reaches this zone.

5. The aphotic zone is:
A. Dark ocean zone

, B. Shallow water zone
C. River zone
D. Coastal beach
Answer: A
Rationale: No sunlight penetration.

6. Primary producers in marine ecosystems are mainly:
A. Phytoplankton
B. Fish
C. Sharks
D. Whales
Answer: A
Rationale: Photosynthetic organisms.

7. Phytoplankton perform:
A. Photosynthesis
B. Digestion
C. Respiration only
D. Decomposition
Answer: A
Rationale: They produce oxygen and food.

8. Zooplankton are:
A. Tiny drifting animals
B. Plants
C. Rocks
D. Algae only
Answer: A
Rationale: Small animal plankton.

9. Nekton refers to:
A. Actively swimming organisms
B. Floating plants
C. Sediments
D. Rocks
Answer: A
Rationale: Free-swimming marine animals.

10. Benthos refers to:
A. Bottom-dwelling organisms

, B. Air animals
C. Birds
D. Surface plants
Answer: A
Rationale: Organisms living on seafloor.

11. Marine food chain starts with:
A. Phytoplankton
B. Sharks
C. Whales
D. Birds
Answer: A
Rationale: Primary producers.

12. Coral reefs are formed by:
A. Coral polyps
B. Fish only
C. Algae only
D. Rocks only
Answer: A
Rationale: Living coral organisms.

13. Coral reefs are important because they:
A. Support high biodiversity
B. Are lifeless
C. Produce soil
D. Increase pollution
Answer: A
Rationale: Rich ecosystems.

14. Estuaries are where:
A. Freshwater meets saltwater
B. Rivers freeze
C. Oceans disappear
D. Mountains form
Answer: A
Rationale: Mixing zones.

15. Mangroves are:
A. Coastal salt-tolerant trees