Question 1

Although some exceptions exist,the majority of mollusks are protected within a shell that is secreted by the animal's ________.

Accepted Answer

The answer of Although some exceptions exist,the majority of mollusks...

Question 2

The mesoglea in a cnidarian is not considered a true tissue because it originates as a ________ rather than from cell division.

Accepted Answer

The answer of The mesoglea in a cnidarian is not...

Question 3

The swim bladder illustrates how an adapted characteristic can be used for a secondary function when environmental pressures change; although first used for buoyancy,it later served as a primitive ________.

Accepted Answer

The answer of The swim bladder illustrates how an adapted...

Question 4

Except for the hagfish,lamprey,and their close relatives,all vertebrates have paired jaws; how did jaws evolve within an evolutionary clade that already had a skeleton?

Accepted Answer

The modification of an existing skeletal element occurred, in this case, the gill arch was modified. This is supported by fossil evidence showing gradual changes in skeletal structures of early jawed vertebrates.

Question 5

Sponges are considered the most ancient of animals; although multicellular,sponges have not developed the ________ present in all other animals.

Accepted Answer

The answer of Sponges are considered the most ancient of...

Question 6

The following figure shows the vertebrates and arthropods as being distantly related,yet each has features,such as limbs and jaws,seen in no other groups.How can such obvious similarities be disregarded in favor of embryological development as a basis for classification?

Accepted Answer

The answer of The following figure shows the vertebrates and...

Question 7

The evolutionary tree of the vertebrates supports which conclusion?

Accepted Answer

The answer of The evolutionary tree of the vertebrates supports...

Question 8

The conservation organization Ocean Blue has developed a seafood recommendation list that advises avoiding many captive-reared species; why might seafood captured from sustainable wild stocks be more desirable?

Accepted Answer

Seafood harvested sustainably can improve local economies by providing jobs and income for fishing communities while also promoting long-term sustainability of the fish population.

Question 9

Snakes can often be found resting on asphalt highways at dusk; what biological factor motivates them to engage in this behavior?

Accepted Answer

Snakes are ectothermic, which means that their body temperature is regulated by the environment they are in. Asphalt and rocks retain heat longer than the surrounding ground, which makes them a desirable resting spot for snakes, especially during cooler times of the day or night.

Question 10

Reptiles display many adaptations supporting a terrestrial lifestyle; the most significant in reducing their dependency on an aquatic habitat is ________.

Accepted Answer

The amniotic egg, which is an adaptation unique to reptiles and their descendants, allows them to develop and hatch on land, reducing their reliance on an aquatic environment. This adaptation includes a protective outer shell, an amnion (a fluid-filled sac that protects the embryo), a yolk sac (which provides nutrients for the developing embryo), and several other specialized membranes. Keratinized scales and ectothermy are also important adaptations for a terrestrial lifestyle, but the amniotic egg is the most significant in terms of reducing dependency on water. The three-chambered heart, while important for circulatory efficiency, is not directly related to reducing aquatic dependency.

Question 11

An animal having radial symmetry,a complete gut,and mesoglea would be a(n)________.

Accepted Answer

The answer of An animal having radial symmetry,a complete gut,and...

Question 12

For the insects that undergo complete metamorphosis,the larva matures to form a ________.

Accepted Answer

The answer of For the insects that undergo complete metamorphosis,the...

Question 13

Fossil evidence suggests that feathers existed prior to the development of a flight-capable skeleton; because these feathered animals could not fly,biologists suspect that the initial adaptive value for feathers was related their ability to

Accepted Answer

Fossil evidence suggests that feathers existed before flight, indicating that the initial adaptive value of feathers was not related to flight but to serving as insulation. Feathers would have provided warmth and allowed for better regulation of body temperature, making them an advantageous adaptation.

Question 14

The myriapods are a relatively small group of arthropods; its most common members are the ________ and ________.

Accepted Answer

The answer of The myriapods are a relatively small group...

Question 15

Following gastrulation,most animal embryos develop three embryonic tissue layers; the endoderm forms the ________ layer.

Accepted Answer

The answer of Following gastrulation,most animal embryos develop three embryonic...

Question 16

The vertebrates are grouped into a lineage because all members possess an internal ________.

Accepted Answer

The answer of The vertebrates are grouped into a lineage...

Question 17

The periodic cicadas start life as a fertilized egg,hatch to become a nymph that burrows underground for 13 or 17 years,emerge as a nymph,and molt to become an adult.Which term best describes this life cycle?

Accepted Answer

The life cycle of periodic cicadas involves nymphs that do not go through a larval or pupal stage, which is characteristic of incomplete metamorphosis.

Question 18

During cephalization,the structures that develop at the anterior margin of a bilateral animal are primarily associated with ________ and ________.

Accepted Answer

The answer of During cephalization,the structures that develop at the...

Question 19

The success of mammals is due in large part to several highly effective reproductive strategies,which includes all of the following EXCEPT

Accepted Answer

The reproductive strategies mentioned in the question include only those related to reproduction and development of offspring. Endothermy and body temperature regulation, while important for mammals, are not directly related to their reproductive success.

Question 20

In addition to embryonic similarities,the chordates and echinoderms also each possess a hollow nerve cord located on the ________ side of the body.

Accepted Answer

The answer of In addition to embryonic similarities,the chordates and...

Quiz 19: Animalia