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Ocean Life > Exam 2 Review > Flashcards

Exam 2 Review Flashcards

1
Q

Holoplankton are plankton that…

A

Spend their entire lives as plankton

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2
Q

Which of the following best describes the role of bacteria in the microbial loop?

A

Consume dissolved organic matter

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3
Q

Which of the following groups of organisms has the largest number of species?

A

Bacteria

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4
Q

Which of the following is not a conservation concern for marine plants?

A

Bycatch

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5
Q

An organism that is considered an extremophile is most likely which type of organism?

A

Archaea

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6
Q

Which of these autotrophic groups shows evidence of secondary endosymbiosis in their photosynthetic pigments?

A

Brown algae

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7
Q

In a trophic energy pyramid, approximately what percentage of energy is conserved as you move up a single trophic level?

A

10%

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8
Q

What type of organisms are responsible for red tides?

A

Dinoflagellates

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9
Q

Health of which of the following species is of the greatest concern with regard to ocean acidification?

A

Coccolithophores (calcium carbonate shells)

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10
Q

Terrestrial vascular plants evolved from marine vascular plants, such as eelgrass.

A

False

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11
Q

A blue whale is a ___ selected species, an oyster is a ____ selected species, and an ocean sunfish is a ____ selected species.

A

k, r, r

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12
Q

Jellyfish populations have been _______ in many areas supposedly as a result of overfishing.

A

Increasing

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13
Q

Marine invertebrates are members of the Phylum Chordata.

A

False

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14
Q

The “immortal” jellyfish (Turritopsis nutriculata) is so-named for its ability to…

A

Revert to “juvenile” stage when stressed

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15
Q

The term ______ refers to an organism that floats freely in the water column, while the term _______ refers to an organism that can swim against the current.

A

Planktonic; Nektonic

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16
Q

Every year, red crabs (Gecarcoidea natalis) migrate from the forests of Christmas Island in southwest Indonesia to the sea. Until recently, over 120 million crabs made the journey. However, red crabs have recently undergone a noticeable decline. What is primarily responsible for this decline?

A

Introduction of the yellow crazy ant

17
Q

Which of the following is not a subphyla of arthropods?

A

Cephalopoda

18
Q

Infaunal organisms are those that…

A

Live between the grains of the sediments on the sea floor

19
Q

Which of the following species of cartilaginous fish feeds primarily on plankton?

A

Manta ray

20
Q

Which of the following has a motile or swimming zoospore phase as part of their life cycle?

A

Giant Kelp

21
Q

Red algae gets its coloration because their pigment phycoerythrin absorbs which color of light?

A

Blue

22
Q

How fast can the brown algae, giant kelp, grow in a day?

A

60 cm (26 in)

23
Q

Which of the following groups of species is the most ancient?

A

Green Algae

24
Q

Seaweeds and sea grasses are the most dominant autotrophs in the ocean

A

False

25
Q

Phytoplankton are the dominant autotrophs in the oceans

A

True

26
Q

Overall, the single habitat on earth that produces the most total biomass is:

A

Open ocean

27
Q

Which of the following is an example of a meroplankton species?

A

Crab Larvae

28
Q

Which of the following is not a reason scientists think zooplankton do vertical migration?

A

To photosynthesize

29
Q

Due to their silica shells, diatoms are likely to experience problems from ocean acidification?

A

False

30
Q

Which of the following is the largest species of shark?

A

Whale Shark

31
Q

Are cartilaginous fish ectothermic or endothermic?

A

Ectothermic

32
Q

Which of the following species is the most ancient?

A

Hag fish

33
Q

True or False: All sharks are carnivores?

A

True

34
Q

How much have the populations been reduced for most large species of sharks in the past 30 years?

A

90%

Ocean Life (4 decks)

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