Question 1

The larval stage of an animal is best defined as:

Accepted Answer

A) Immature stage that is able to reproduce. 
B) Early colony of cells of fresh-water sponges. 
C) Early stage of development of an organism,typically part of the plankton. 
D) Sperm cell that lives free in the water. 
E) Egg that has been fertilized by more that one sperm. 
A) Immature stage that is able to reproduce. 
B) Early colony of cells of fresh-water sponges. 
C) Early stage of development of an organism,typically part of the plankton. 
D) Sperm cell that lives free in the water. 
E) Egg that has been fertilized by more that one sperm. C

Question 2

Free-floating cnidarians like jellyfish are referred to as having a ___________ type form.

Accepted Answer

A) Polyp 
B) Benthic 
C) Bilateral 
D) Medusa 
E) Asexual 
A) Polyp 
B) Benthic 
C) Bilateral 
D) Medusa 
E) Asexual D

Question 3

One distinctive feature of arthropods:

Accepted Answer

A) Lack of a digestive system. 
B) Jointed legs. 
C) Gills in a mantle cavity. 
D) Proboscis used to capture prey. 
E) Lack of a brain. 
A) Lack of a digestive system. 
B) Jointed legs. 
C) Gills in a mantle cavity. 
D) Proboscis used to capture prey. 
E) Lack of a brain. B

Question 4

One distinctive feature of all echinoderms:

Accepted Answer

A) Jointed legs. 
B) Gill slits. 
C) Endoskeleton. 
D) Water vascular system. 
E) Bilateral symmetry. 
A) Jointed legs. 
B) Gill slits. 
C) Endoskeleton. 
D) Water vascular system. 
E) Bilateral symmetry.

Question 5

All molluscs:

Accepted Answer

A) Have a soft body often covered by a shell made of silica 
B) Have a soft body covered by a mantle. 
C) Have an externally segmented body. 
D) Lack a larval stage. 
E) Lack a circulatory system. 
A) Have a soft body often covered by a shell made of silica 
B) Have a soft body covered by a mantle. 
C) Have an externally segmented body. 
D) Lack a larval stage. 
E) Lack a circulatory system.

Question 6

One of the following is not a crustacean:

Accepted Answer

A) Horseshoe crab. 
B) Copepods. 
C) Barnacles. 
D) Shrimps. 
E) Beach hoppers. 
A) Horseshoe crab. 
B) Copepods. 
C) Barnacles. 
D) Shrimps. 
E) Beach hoppers.

Question 7

One group of parasites of fishes,seabirds,and other marine animals is:

Accepted Answer

A) Flukes. 
B) Turbellarians. 
C) Comb jellies. 
D) Ribbon worms. 
E) Segmented worms. 
A) Flukes. 
B) Turbellarians. 
C) Comb jellies. 
D) Ribbon worms. 
E) Segmented worms.

Question 8

Which of the following are not correctly paired?

Accepted Answer

A) Class Asteroidea-sea stars 
B) Class Holothuroidea-sea cucumbers 
C) Class Ophiuroidea-brittle stars 
D) Class Echinoidea-feather stars 
A) Class Asteroidea-sea stars 
B) Class Holothuroidea-sea cucumbers 
C) Class Ophiuroidea-brittle stars 
D) Class Echinoidea-feather stars

Question 9

Which of the following type of cells and structures of sponges does not match the function?

Accepted Answer

A) Collar cells - calcareous structures for support 
B) Osculum - opening through which water leaves 
C) Pore cells - opening through which water enters 
D) Spongin - fibers for support 
E) Gametes - reproduction 
A) Collar cells - calcareous structures for support 
B) Osculum - opening through which water leaves 
C) Pore cells - opening through which water enters 
D) Spongin - fibers for support 
E) Gametes - reproduction

Question 10

Comb jellies are:

Accepted Answer

A) Bilaterally symmetrical. 
B) Similar to a cnidarian polyp. 
C) Distinguished by eight bands of cilia. 
D) Colonial animals. 
E) Carnivores that use nematocysts to capture prey. 
A) Bilaterally symmetrical. 
B) Similar to a cnidarian polyp. 
C) Distinguished by eight bands of cilia. 
D) Colonial animals. 
E) Carnivores that use nematocysts to capture prey.

Question 11

A nudibranch is a type of:

Accepted Answer

A) Platyhelminthes. 
B) Nematode. 
C) Annelid. 
D) Cnidarian. 
E) Mollusc. 
A) Platyhelminthes. 
B) Nematode. 
C) Annelid. 
D) Cnidarian. 
E) Mollusc.

Question 12

All cnidarians share all of these features except one:

Accepted Answer

A) Nematocysts. 
B) Multicellular. 
C) Radial symmetry. 
D) Complete digestive tract with mouth and anus. 
E) Marine and fresh-water. 
A) Nematocysts. 
B) Multicellular. 
C) Radial symmetry. 
D) Complete digestive tract with mouth and anus. 
E) Marine and fresh-water.

Question 13

Beard worms are unique because they lack:

Accepted Answer

A) Symmetry. 
B) A skin. 
C) A digestive tract. 
D) Cells or tissues. 
E) A reproductive system. 
A) Symmetry. 
B) A skin. 
C) A digestive tract. 
D) Cells or tissues. 
E) A reproductive system.

Question 14

Which of the following is not an arthropod?

Accepted Answer

A) Cephalopods 
B) Copepod 
C) Krill 
D) Barnacle 
E) Blue crab 
A) Cephalopods 
B) Copepod 
C) Krill 
D) Barnacle 
E) Blue crab

Question 15

Which of the following is not correctly paired?

Accepted Answer

A) Phylum Ctenophora-comb jellies 
B) Phylum Nematoda-round worms 
C) Phylum Nemertea-ribbon worms 
D) Phylum Platyhelminthes-beard worms 
E) Phylum Porifera-sponges 
A) Phylum Ctenophora-comb jellies 
B) Phylum Nematoda-round worms 
C) Phylum Nemertea-ribbon worms 
D) Phylum Platyhelminthes-beard worms 
E) Phylum Porifera-sponges

Question 16

Sponges and all filter feeders use the following as a food source:

Accepted Answer

A) Invertebrates only. 
B) All particulate matter suspended in water. 
C) Particulate matter that deposits on the bottom only. 
D) Dead vertebrates. 
E) Vegetable matter only in the water. 
A) Invertebrates only. 
B) All particulate matter suspended in water. 
C) Particulate matter that deposits on the bottom only. 
D) Dead vertebrates. 
E) Vegetable matter only in the water.

Question 17

Polychaete worms show:

Accepted Answer

A) A body covered with a mantle. 
B) Segmentation. 
C) Radial symmetry. 
D) Incomplete digestive tract. 
E) U-shaped gut. 
A) A body covered with a mantle. 
B) Segmentation. 
C) Radial symmetry. 
D) Incomplete digestive tract. 
E) U-shaped gut.

Question 18

A polychaete worm is:

Accepted Answer

A) A Platyhelminthes. 
B) A Nematode. 
C) A Cnidarian. 
D) An Annelid. 
E) A Fluke. 
A) A Platyhelminthes. 
B) A Nematode. 
C) A Cnidarian. 
D) An Annelid. 
E) A Fluke.

Question 19

The most distinctive feature of ribbon worms is:

Accepted Answer

A) Long proboscis. 
B) Segmented body. 
C) Absence of a digestive tract. 
D) Long bands of cilia used in locomotion. 
E) Radial symmetry. 
A) Long proboscis. 
B) Segmented body. 
C) Absence of a digestive tract. 
D) Long bands of cilia used in locomotion. 
E) Radial symmetry.

Question 20

Arrow worms feed on:

Accepted Answer

A) Organic matter that deposits on the bottom. 
B) Plant matter. 
C) Nutrients dissolved in the water. 
D) Live prey. 
E) Organic matter filtered from the water. 
A) Organic matter that deposits on the bottom. 
B) Plant matter. 
C) Nutrients dissolved in the water. 
D) Live prey. 
E) Organic matter filtered from the water.

The larval stage of an animal is best defined as:

Free-floating cnidarians like jellyfish are referred to as having a ___________ type form.

One distinctive feature of arthropods:

One distinctive feature of all echinoderms:

All molluscs:

One of the following is not a crustacean:

One group of parasites of fishes,seabirds,and other marine animals is:

Which of the following are not correctly paired?

Which of the following type of cells and structures of sponges does not match the function?

Comb jellies are:

A nudibranch is a type of:

All cnidarians share all of these features except one:

Beard worms are unique because they lack:

Which of the following is not an arthropod?

Which of the following is not correctly paired?

Sponges and all filter feeders use the following as a food source:

Polychaete worms show:

A polychaete worm is:

The most distinctive feature of ribbon worms is:

Arrow worms feed on:

The Science of Marine Biology

The Sea Floor

Chemical and Physical Features of Seawater and the World Ocean

Fundamentals of Biology

The Microbial World

Multicellular Primary Producers: Seaweeds and Plants

Marine Fishes

Marine Reptiles, Birds, and Mammals

An Introduction to Marine Ecology

Between the Tides

Estuaries: Where Rivers Meet the Sea

Life on the Continental Shelf

Coral Reefs

Life Near the Surface

The Ocean Depths

Resources From the Sea

The Impact of Humans on the Marine Environment

The Oceans and Human Affairs

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Exam 7: Marine Animals Without a Backbone

The larval stage of an animal is best defined as:

Free-floating cnidarians like jellyfish are referred to as having a ___________ type form.

One distinctive feature of arthropods:

One distinctive feature of all echinoderms:

All molluscs:

One of the following is not a crustacean:

One group of parasites of fishes,seabirds,and other marine animals is:

Which of the following are not correctly paired?

Which of the following type of cells and structures of sponges does not match the function?

Comb jellies are:

A nudibranch is a type of:

All cnidarians share all of these features except one:

Beard worms are unique because they lack:

Which of the following is not an arthropod?

Which of the following is not correctly paired?

Sponges and all filter feeders use the following as a food source:

Polychaete worms show:

A polychaete worm is:

The most distinctive feature of ribbon worms is:

Arrow worms feed on:

The Science of Marine Biology

The Sea Floor

Chemical and Physical Features of Seawater and the World Ocean

Fundamentals of Biology

The Microbial World

Multicellular Primary Producers: Seaweeds and Plants

Marine Fishes

Marine Reptiles, Birds, and Mammals

An Introduction to Marine Ecology

Between the Tides

Estuaries: Where Rivers Meet the Sea

Life on the Continental Shelf

Coral Reefs

Life Near the Surface

The Ocean Depths

Resources From the Sea

The Impact of Humans on the Marine Environment

The Oceans and Human Affairs

Filters