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Principles of Animal Physiology, 3e (Moyes/Schulte)
B) the sodium-potassium pump regulates osmotic balance.
C) chemical messengers are not used to communicate.
D) collagen is used to build tissues.
Answer: A
Page ref: 23-24
7) All animals
A) eat other animals.
B) are multicellular.
C) reproduce sexually.
D) are triploblastic.
Answer: B
Page ref: 24
11) In early gastrulation, a depression called a blastopore forms. If this blastopore forms the anus, the
animals are referred to as
A) deuterostomes.
B) protostomes.
C) gastrostomes.
D) diploblasts.
Answer: A
Page ref: 25
Answer: C
Page ref: 25-28
18) Which of the following characteristics would be most beneficial for animals to successfully survive on
land?
25) In terms of reproduction, which group of mammals is most similar to their reptilian ancestors?
A) monotremes
B) marsupials
C) placental mammals
D) flying mammals
Answer: A
Page ref: 32
28) Would you expect gene duplication, such as seen in the Hox gene, to lead to significant changes in
evolution of traits?
A) No, because a duplicated gene would most likely carry a deleterious mutation.
B) No, because a duplicated gene would be identical to the original gene and perform the original
function.
C) Yes, because one gene would perform a specific function, but duplicated copies could perform new
functions.
D) Yes, because the Hox gene controls all traits.
Answer: C
Page ref: 33
30) Only certain organisms possess gene variants that are able to exchange Na+ for K+, thus making the
Na+/K+ ATPase unique to
A) animals.
B) fungi.
C) plants and animals.
D) fungi and plants.
Answer: A
Page ref: 34
34) Which of the following organisms are able to thrive under the most diverse environmental conditions
due to their remarkable biochemical adaptations?
A) prokaryotes
B) plants
C) fungi
D) invertebrates
Answer: A
Page ref: 36
Answer: B
Page Ref: 36
37) are often called extremophiles, because they can survive in some of the harshest
environments on earth.
Answer: Archaea
Page Ref: 21
39) The tissues of Cnidarians are termed because they are derived from two embryonic
body layers.
Answer: diploblastic
Page Ref: 24
40) The body plan of sponges is , while cnidarians are _.
Answer: asymmetrical; radially symmetrical
Page Ref: 25
42) In echinoderms and chordates, the mouth forms second; therefore, both are .
Answer: deuterostomes
Page Ref: 25, 28
43) The first group of vertebrates to successfully colonize land was the .
Answer: amphibians
Page Ref: 31
44) In reptiles and birds, the evolution of the removed the dependence on water and
allowed complete transition to life on land.
Answer: amniote egg
Page Ref: 32
45) Birds are most closely related to the group of reptiles known as .
Answer: archosaurs
Page Ref: 32
47) Many eukaryotes have myosin 2, but only use it to build muscle.
Answer: animals
Page ref: 33
48) The Na+/K+ ATPase enables animal cells to create an electrical potential across the .
Answer: cell membrane
Page Ref: 35
51) We often hear the terms protists, protozoans, and metazoans; briefly explain the relationship among
them.
Answer: When we think about the origin of animals, we often think of protists. Protists are single-
celled, eukaryotic organisms that possess a membrane-bound nucleus and organelles. Protists are a
very diverse group of distantly-related organisms, and hence assigned to more than 50 phyla. Some
protists are animal-like and mobile, and because locomotion was considered a unique trait of
animals, animal-like protists were once considered to be the ancestors of animals and were referred
to as protozoans. Currently, the term protozoan has no meaningful evolutionary basis. The term
metazoan was originally created to differentiate single-celled protozoans from multicellular animals.
“Metazoan” and “animal” are often used synonymously.
Page Ref: 22
52) List the four key morphological traits that characterize all chordates. Discuss the important
physiological transitions from early chordates to Craniata and their evolutionary implication.
Answer: All chordates have a notochord, dorsal nerve cord, postanal tail, and pharyngeal slits.
When we compare early chordates to Craniata, we see several physiological transitions such as an
increase in the complexity of the nervous system, the formation of a larger brain, a backbone
derived from the notochord, an endoskeleton with the cranium, segmented muscles, and large
blood vessels. The filter-feeding pharyngeal structures in lancelets and tunicates evolved into a
diversity of structures, including gills of fish, jawbones, ear bones, muscles, nerves, and blood
vessels. The evolution of these structures resulted in an extensive diversity of vertebrates.
Page Ref: 28
53) From an evolutionary perspective, briefly explain why amphibian physiology provides an important
link between aquatic and terrestrial organisms.
Answer: Amphibians are intermediate between fish and reptiles in several ways. For example,
amphibian larvae are aquatic and breathe via gills, just like fish. When in water, adult amphibians
face similar osmotic challenges as do freshwater fish. Unlike fish, adult amphibians use lungs to
breathe on land, may also use their skin as a gas-exchange surface, and excrete urea as a waste
product. We see similarities between amphibians and reptiles when it comes to skeletons and
muscles: Land tetrapods require more robust skeletons and musculature to support their bodies on
land. Some amphibians, such as toads, have evolved a thickened body covering to avoid
desiccation. Reptiles are even better adapted to dry conditions, having evolved tough scales to
prevent water loss.
Page Ref: 31
55) Discuss the evolutionary connection between bilateral symmetry and cephalization in animals.
Answer: As organisms became more complex, this complexity was associated with an increase in
cephalization. Very early animals had simple nervous systems with little centralization for
processing information. Bilaterally symmetrical animals show a concentration of sensory and
nervous tissue in the anterior parts of their bodies. With the evolution of bilateral symmetry,
animals were able to move in a forward direction, using the sensory anterior end to locate food or
sense threats. For example, arthropods, which are bilaterally symmetrical, have a distinct head
region that processes extensive sensory information. Vertebrates show even more extensive
cephalization. In mammals, for example, the brain and central nervous system control breathing,
feeding, reflexes, thermoregulation, and movement.
Page Ref: 36
56) Describe some key physiological adaptations that allowed animals to successfully colonize terrestrial
environments.
Answer: Animals had to evolve physiological adaptations to successfully invade terrestrial
environments. Desiccation is a risk for all land organisms, therefore, adaptations to conserve water
were critical. Animals also had to overcome the challenge of controlling their internal osmolarity,
independent of the external environment. Animals evolved a body surface that would prevent
water loss (e.g., reptilian scales). An excretory system used to expel nitrogenous wastes out of
water was also an important adaptation for land animals. When water was no longer available for
support, skeletons and muscles evolved to allow locomotion on land. In addition, respiratory
systems to exchange gases on land became a requirement for successful survival on land.
Page Ref: 36
MAROCCO.
MEQUINAS.
FAS.
This city (which is divided into old and new, called Fas Jedide, and
Fas El Bâlee) is the most celebrated in West Barbary; it was founded
about the 185th year of the Hejira (A.C. 786) by Idris,[67] a
descendant of Mohammed. It stands for the most part upon gentle
hills, except the centre, which is low, and in winter very wet and
dirty. It is not so extensive as Marocco, but the houses being more
lofty and spacious, it contains more inhabitants. The houses have
flat roofs ingeniously worked in wood, and covered with terrace, on
which the inhabitants spread carpets in summer, to recline upon,
and enjoy the cool breezes of the evening; a small turret, containing
a room or two, is also erected upon them for the use of the females
of the family, who resort thither for amusement and pastime. In the
centre of each house is an open quadrangle surrounded by a gallery,
which communicates with the staircase, and into which the doors of
the different apartments open; these doors are both wide and lofty,
and are made of curiously carved wood painted in various colours.
The beams of the roofs of the different apartments are whimsically
painted with gay colours in the arabesque style. The portals of the
houses are supported with pillars of brick plaistered over. The
principal houses have (Mitferes) cisterns under them, containing
water used in the baths, which are built of marble or stone. Every
house is also supplied with water from a river which rises in the
Atlas, and enters the town in various places by covered channels.
The hospitals, colleges, and houses of the great and wealthy have,
withinside, spacious courts, adorned with sumptuous galleries,
fountains, basons of fine marble, and fish-ponds, shaded with
orange, lemon, pomgranate, and fig trees, abounding with fruit, and
ornamented with roses, hyacinths, jasmine, violets, and orange
flowers, emitting a delectable fragrance.
In the city are a great number of mosques, sanctuaries, and other
public buildings; about fifty of these are very sumptuous edifices,
being ornamented with a kind of marble, unknown in Europe,
procured in the Atlas mountains.[68]
The maintenance of professors and students in the mosques, has
lately become very scanty, the wars having destroyed many of the
possessions by which learning was promoted. The students are
mostly employed in reading the Koran; if any one read a text which
he does not understand, the professor explains it to him in public; at
other times they dispute among themselves, and the professor
finally explains the passage.
A public bath is attached to each mosque, for religious ablutions;
there are also public baths in various parts of the town, whither the
common people resort;[69] the men at one hour and the women at