 |
1 | |
An older term that refers to both the Cnidaria and the Ctenophora is ___________, which means hollow gut.
|
| | A) | enteron
|
| | B) | polymorphism
|
| | C) | gastrovascular
|
| | D) | coelenterata
|
|
|
2 | |
Of the most important to the ecology of the oceans, and hence economically important group of the Cnidaria is the
|
| | A) | Anthozoa.
|
| | B) | Scyphozoa.
|
| | C) | Cubozoa.
|
| | D) | Hydrozoa.
|
|
|
3 | |
The cnidarian body form that is adapted for floating or free swimming is the
|
| | A) | mesoglea.
|
| | B) | polypoid.
|
| | C) | medusa.
|
| | D) | polyp.
|
|
|
4 | |
The medusa body form is commonly called a jellyfish and is buoyant because it has a lot of the material called the
|
| | A) | hydranth.
|
| | B) | rhopalium.
|
| | C) | cnidocil.
|
| | D) | mesoglea.
|
|
|
5 | |
A nematocyst is discharged by high _______ within the living cell.
|
| | A) | osmotic pressure
|
| | B) | diffusion pressure
|
| | C) | hypertonic pressure
|
| | D) | atmospheric pressure
|
|
|
6 | |
A strobila is a structure found in the life cycle of members of the class
|
| | A) | Hydrozoa.
|
| | B) | Scyphozoa.
|
| | C) | Cubozoa.
|
| | D) | Anthozoa.
|
|
|
7 | |
The gastrovascular cavity of the members of the class Cnidaria is covered on the inside by a layer of
|
| | A) | epithelial cells.
|
| | B) | mesogleal cells.
|
| | C) | gastrodermal cells.
|
| | D) | epitheliomuscular cells.
|
|
|
8 | |
The _______ cells are undifferentiated stem cells that can mature into sex cells, nerve cells, and other types of cells.
|
| | A) | cnidocyte
|
| | B) | interstitial
|
| | C) | sensory
|
| | D) | glandular
|
|
|
9 | |
The support system of the radiate animals is called a hydrostatic skeleton, which means that it is based on the amount of
|
| | A) | spicules.
|
| | B) | gas pressure.
|
| | C) | calcium deposits.
|
| | D) | water pressure
|
|
|
10 | |
Movement by gliding on the basal disc is characteristic of
|
| | A) | scyphozoans.
|
| | B) | cubozoans.
|
| | C) | polyps.
|
| | D) | medusa.
|
|
|
11 | |
One way to differentiate between the classes of Cnidaria is by the source of the gonadal tissue. The gonads are epidermal in the class ____________ and gastrodermal in the other groups.
|
| | A) | Hydrozoa
|
| | B) | Scyphozoa
|
| | C) | Cubozoa
|
| | D) | Anthozoa
|
|
|
12 | |
In jellyfish, the mouth is at the end of the
|
| | A) | gonangia.
|
| | B) | gastrovascular cavity.
|
| | C) | manubrium.
|
| | D) | velum.
|
|
|
13 | |
Some hydrozoans form floating colonies with several types of medusae and polyps; an example of this type of design would be
|
| | A) | members of the genus Gonionemus.
|
| | B) | members of the genus Physalia.
|
| | C) | members of the genus Aurelia.
|
| | D) | members of the genus Tealia.
|
|
|
14 | |
Scyphomedusae have no velum and sometimes have a scalloped margin. Each notch of the margin will bear sense organs called _______ and lobelike projects called
|
| | A) | manubria, rhopalia.
|
| | B) | lappets, statocysts.
|
| | C) | rhopalia, lappets.
|
| | D) | statocysts, manubria.
|
|
|
15 | |
In some body forms, there is the combination of a velarium and pedalium at each tentacle. This combination will identify which one of the cnidarian classes?
|
| | A) | Hydrozoa
|
| | B) | Scyphozoa
|
| | C) | Cubozoa
|
| | D) | Anthozoa
|
|
|
16 | |
The subclass of the anthozoans that includes the sea anemones, hard corals, and others is the subclass
|
| | A) | Zoantharia.
|
| | B) | Ceriantipatharia.
|
| | C) | Scyphozoa.
|
| | D) | Alcyonaria.
|
|
|
17 | |
Which of the following groups includes only the tube anemones and thorny corals?
|
| | A) | Zoantharia
|
| | B) | Ceriantipatharia
|
| | C) | Scyphozoa
|
| | D) | Alcyonaria
|
|
|
18 | |
Which of the following groups includes the soft and horny corals?
|
| | A) | Zoantharia
|
| | B) | Ceriantipatharia
|
| | C) | Scyphozoa
|
| | D) | Alcyonaria
|
|
|
19 | |
The sexes are separate in some sea anemones, while others have individuals with both types of gonads. This latter type of animal is called
|
| | A) | asexual.
|
| | B) | diploid.
|
| | C) | monoecious.
|
| | D) | dioecious.
|
|
|
20 | |
The members of phylum Ctenophora move about by means of
|
| | A) | fin flexing.
|
| | B) | muscle contraction.
|
| | C) | planktonic currents.
|
| | D) | comb plates.
|
|
|
21 | |
A life cycle that has two different body forms is called
|
| | A) | anthroploid.
|
| | B) | polymorphic.
|
| | C) | dimorphic.
|
| | D) | endomorphic.
|
|
|
22 | |
Reef building corals are members of the class Anthozoa, which are able to grow much faster than other anthozoans because they have a mutualistic relationship with zooxanthellae.
|
| | A) | True
|
| | B) | False
|
|
|
23 | |
In some sea anemones, asexual reproduction occurs when pieces of the base are lost during locomotion and these regenerate into new individuals. The method is called pedal laceration.
|
| | A) | True
|
| | B) | False
|
|
|
24 | |
Both cnidarians and ctenophores have two cell layers, with an acellular, jelly-like layer in between.
|
| | A) | True
|
| | B) | False
|
|
|
25 | |
In many anemones, the edges of the septa are extended into thread like structures that contain nematocysts and gland cells. These structures are called acontia.
|
| | A) | True
|
| | B) | False
|
|
|
26 | |
All ctenophores bear both an ovary and a testis. This condition is called dioecious.
|
| | A) | True
|
| | B) | False
|
|
|
27 | |
Both cnidarians and ctenophores exhibit extracellular digestion, tentacles, a gastrovascular cavity, and colloblasts.
|
| | A) | True
|
| | B) | False
|
|
|
28 | |
Sea anemones move food into the gastrovascular cavity by ciliary action in the siphonoglyph, which passes food into the acontia.
|
| | A) | True
|
| | B) | False
|
|
|
29 | |
Sometimes anthozoans will have a mutualistic relationship with algae to enhance their potential for growth. These algae are called zooxanthellae.
|
| | A) | True
|
| | B) | False
|
|
|
30 | |
The lid or covering at one end of a nematocyst is called an operculum, and the triggerlike part is known as the cnidocil.
|
| | A) | True
|
| | B) | False
|
|
|
31 | |
The nerve nets of the cnidarians are peculiar in that impulses travel in two directions. This is possible because the neurons have vesicles of neurotransmitters on both sides of the synapses.
|
| | A) | True
|
| | B) | False
|
|
|
32 | |
The scyphozoan life cycle is as follows: planula, scyphistoma, strobila, ephyra, medusa, sperm and ova, planula.
|
| | A) | True
|
| | B) | False
|
|
|
33 | |
The radiates are the simplest animals to possess true neurons, but the neurons are arranged in a nerve net, and there is no brain.
|
| | A) | True
|
| | B) | False
|
|
|
34 | |
In the man o'war, the gastrozooids are the reproductive polyps.
|
| | A) | True
|
| | B) | False
|
|
|
35 | |
An animal that is protandrous produces eggs first, then sperm.
|
| | A) | True
|
| | B) | False
|
|
|
36 | |
The sea pansy is a member of Class Anthozoa, subclass Ceriantipatharia, and lives in tubes in soft sediments on the ocean floor.
|
| | A) | True
|
| | B) | False
|
|
|
37 | |
An atoll encircles a lagoon, but not an island. A barrier reef, however, could surround all or part of an island.
|
| | A) | True
|
| | B) | False
|
|
|
38 | |
The portion of the reef that receives the most wave force is the reef flat.
|
| | A) | True
|
| | B) | False
|
|
|
39 | |
Of the radiates, the ctenophores are most likely to be bioluminescent.
|
| | A) | True
|
| | B) | False
|
|