Exam 4 Practice Test

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D) copepods

In an area with a high abundance of algal blooms, the introduction of _____ might alleviate the severity of the blooms.
A) dinoflagellates
B) plankton
C) primary producers
D) copepods

A) They are food for many marine organisms that humans eat.

Plankton is comprised of photosynthetic protists and bacteria. What is the primary importance of plankton to humans?
A) They are food for many marine organisms that humans eat.
B) They release a lot of carbon dioxide into the atmosphere.
C) They contribute to the formation of anaerobic dead zones in the oceans.
D) They form the basic building blocks in the formation of petroleum (oil).

A) dinoflagellates

Which of the following is most likely to lead to PSP (paralytic shellfish poisoning)?
A) dinoflagellates
B) Giardia
C) Plasmodium
D) Toxoplasma
E) diatoms

A) The engulfed cell provided the host cell with ATP.

According to the endosymbiotic theory, why was it adaptive for the larger (host) cell to keep the engulfed cell alive, rather than digesting it as food?
A) The engulfed cell provided the host cell with ATP.
B) The engulfed cell provided the host cell with carbon dioxide.
C) The engulfed cell allowed the host cell to metabolize glucose.
D) The host cell was able to survive anaerobic conditions with the engulfed cell alive.
E) The host cell would have been poisoned if it had digested the engulfed cell.

A) contain a nucleus

Which of the following characteristics is true of all protists?
A) contain a nucleus
B) smaller than animal cells
C) unicellular
D) have a cell wall
E) photosynthetic

D) choanoflagellates

Which of the following species would you not classify as an animal?
A) sponges
B) coral
C) jellyfish
D) choanoflagellates

C) a large variety of methods for capturing and processing food

The evolution of animal species has been prolific (the estimates go into the millions and tens of millions). To what does the text attribute much of this diversity?
A) novel reproductive strategies
B) a large variety of body plans
C) a large variety of methods for capturing and processing food
D) a complex nervous system providing the intelligence for survival in difficult times
E) the development of multiple tissue types

A) nervous-mesoderm

Which tissue type, or organ, is not correctly matched with its germ layer tissue?
A) nervous-mesoderm
B) muscular-mesoderm
C) stomach-endoderm
D) skin-ectoderm
E) skeletal-mesoderm

A) Their larvae are motile, and move via the motion of cilia.

Which of the following is true of the sponges?
A) Their larvae are motile, and move via the motion of cilia.
B) They are the simplest diploblastic animals.
C) They exhibit bilateral symmetry.
D) They have a nerve net but not a CNS.
E) Their feeding cells are called choanoflagellates

A) is bilaterally symmetrical

An organism that exhibits cephalization probably also _____.
A) is bilaterally symmetrical
B) has a hydrostatic skeleton
C) has a coelom
D) is segmented
E) is diploblastic

E) It sheds its external skeleton to grow.

You find a new species of worm and want to classify it. Which of the following lines of evidence would allow you to classify the worm as a nematode and not an annelid?
A) It undergoes protostome development.
B) It is segmented.
C) It is triploblastic.
D) It has a coelom.
E) It sheds its external skeleton to grow.

A) the hydrostatic skeleton, allowing greater range of motion

What do biologists cite as the primary benefit of the evolution of a coelom in animals?
A) the hydrostatic skeleton, allowing greater range of motion
B) a more efficient digestive system, in the form of a tube-within-a-tube
C) cephalization and the formation of a cerebral ganglion
D) the subsequent evolution of segmentation

E) limbs with claws

Which of the following would most strongly support your hypothesis that an animal you are observing is an ectoparasite?
A) wormlike body
B) a scolex
C) hooks on its head region
D) lack of a digestive system
E) limbs with claws

C) deposit feeder

A radula is a specialized feeding organ, used to scrape material off of food for ingestion, much like a cheese grater scrapes shreds off of a block of cheese. Snails, which have this structure, are thus which kind of feeder?
A) suspension feeder
B) fluid feeder
C) deposit feeder
D) mass feeder

D) a mouth and a digestive tract

Due to its unusual habitat (inside the digestive tracts of other animals), the tapeworm lacks _____.
A) a head
B) a mouth
C) a digestive tract
D) a mouth and a digestive tract
E) a head, a mouth, and a digestive tract

D) they are animals

All of the following are true about choanoflagellates except _____.
A) they are suspension feeders
B) they are sessile as adults
C) they live in aquatic habitats
D) they are animals
E) they reproduce asexually

C) They grow by shedding their outer covering.

Which of the following do Nematoda and Arthropoda have in common?
A) The initial pore formed in the gastrula stage becomes the anus.
B) They are suspension feeders.
C) They grow by shedding their outer covering.
D) They are lophotrochozoans.
E) They have the same kind of unique, ciliated larvae.

C) They help retain moisture in terrestrial habitats.

Which of the following attributes is true for both arthropod exoskeletons and mollusk shells?
A) They completely replace the hydrostatic skeleton.
B) They are secreted by the mantle.
C) They help retain moisture in terrestrial habitats.
D) They are comprised of the polysaccharide chitin.

A) visceral mass

Which of these mollusk features substitutes for the coelom by providing a space for organ development and circulation of bodily fluids?
A) visceral mass
B) foot
C) mantle
D) mantle cavity

C) feeding structures or mouthparts

When considering the wormlike phyla within the protostomes, which feature is most useful in distinguishing groups?
A) the type of body cavity
B) the presence or absence of a hemocoel
C) feeding structures or mouthparts
D) hydrostatic skeleton

C) thorax

On which body segment are arthropod wings attached?
A) head
B) abdomen
C) thorax
D) evenly split between the abdomen and thorax

E) The pore formed during gastrulation becomes the anus

What do all deuterostomes have in common?
A) Adults are bilaterally symmetrical.
B) Embryos have pharyngeal pouches that may or may not form gill slits.
C) All have a spinal column.
D) All have specialized head and tail regions.
E) The pore formed during gastrulation becomes the anus

B) four limbs

If you found a fossil fish and had dated it to 400 mya, what feature might indicate that it is actually younger than you first thought?
A) a bony exoskeleton
B) four limbs
C) a cartilaginous endoskeleton
D) jaws
E) a bony endoskeleton

A) Tetrapods were no longer tied to the water for reproduction

What is believed to be the most significant result of the evolution of the amniotic egg?
A) Tetrapods were no longer tied to the water for reproduction.
B) Tetrapods can grow much larger.
C) It led to the evolution of the placenta.
D) Newborns are much less dependent on their parents.
E) Embryos are protected from predators.

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