PADI Marine Biology & Conservation 2

Question 1

Which type of coral reproduction involves a coral polyp splitting to create a genetically identical clone?

Accepted Answer

Asexual budding or division

Answer

Asexual budding or division allows coral polyps to clone themselves, expanding a colony without the genetic exchange of sexual reproduction.

Question 2

What is the term for the relationship between clownfish and sea anemones, where both organisms benefit?

Accepted Answer

Mutualism

Answer

Mutualism describes the clownfish-anemone relationship: clownfish gain shelter while the anemone benefits from the fish removing parasites and increasing water circulation.

Question 3

Which marine organism is the primary producer at the base of most open-ocean food webs?

Accepted Answer

Phytoplankton

Answer

Phytoplankton are microscopic photosynthetic organisms that form the foundation of open-ocean food webs by converting sunlight and CO₂ into organic matter.

Question 4

A diver observes a cephalopod rapidly changing skin color and texture. Which animal is most likely being observed?

Accepted Answer

Octopus or cuttlefish

Answer

Octopuses and cuttlefish possess specialized chromatophores and papillae that allow rapid, dynamic color and texture changes for camouflage and communication.

Question 5

What physiological adaptation allows marine mammals such as dolphins to dive repeatedly to depth without suffering decompression sickness?

Accepted Answer

Their lungs collapse at depth, preventing nitrogen absorption

Answer

Marine mammals have flexible ribcages that allow their lungs to collapse under pressure, preventing significant nitrogen uptake and thus avoiding decompression sickness.

(PADI) Certified Professional Association of Diving Instructors Diver Practice Test

(PADI) Certified Professional Association of Diving Instructors Diver Practice Test

PADI Marine Biology & Conservation 2