Question 1

The early amphibian Tiktaalik either crawled or paddled in shallow tropical streams about 380 mya,during the late Devonian period.These shallow waters often became anaerobic.What selective advantage did Tiktaalik have under these conditions?

Accepted Answer

Having lungs and gills allowed for oxygen to be obtained under a wider range of settings.Please see section 17.11 for more information.

Question 2

While walking through a hospital where fingers are reattached,you notice leeches being used on reattached fingers to improve circulation.You realize that annelids can be used in medicine.

Accepted Answer

Leeches are annelids.Please see section 17.6 for more information.

Question 3

If asked for an example of an arthropod and the arthropod trait it exemplified,you could present a centipede as an example of segmentation,since it has many of them.

Accepted Answer

Centipedes,though thay may not literally have 100 segments,are an excellent example of segmented animals.Please see section 17.8 for more information.

Question 4

If you were eating sea urchin sushi,starfish soup,and broiled shark,most,but not all,of your meal would be echinoderms.

Accepted Answer

Starfish and sea urchins are echinoderms while sharks are fish.Please see section 17.9 for more information.

Question 5

The free-swimming tunicate larva resembles a tadpole.Once it settles headfirst onto a solid surface,the tail and notochord disappear and the nerve cord shrinks to nearly nothing.The adults,which are usually sessile,retain only the pharyngeal slits.Neither adult nor larva is segmented.Tunicates do retain what trait as adults which makes them resemble other chordates?

Accepted Answer

Caephalization means that a distinct head forms,usually with both sensory organs and nervous system processing.Please see section 17.10 for more information.

Question 6

Which of the following is a characteristic of annelids?

Accepted Answer

Annelids have some concentration of sensory organs and their nervous system at the mouth end of their bodies.Please see section 17.6 for more information.

Question 7

The observation that Tiktaalik had both gills and lungs suggests what?

Accepted Answer

Tiktaalik was truly transitional,able to obtain oxygen on land or in the water.Please see section 17.11 for more information.

Question 8

Some animals are autotrophs.

Accepted Answer

Animals are all heterotrophs.Please see section 17.1 for more information.

Question 9

Cnidarian bodies are one of two forms.A(n)______ consists of a sessile stalk with tentacles on one end.A(n)______ is a free-swimming,bell-shaped,"tentacles-down" body form with a single opening forming the mouth.

Accepted Answer

Polyps have the digestive opening facing up,while medusas have it facing down.Please see section 17.3 for more information.

Question 10

Nematodes are protected from environmental hazards in part by their cuticle.

Accepted Answer

Nematodes have a protective and durable proteinaceous cuticle on the outside of their bodies.Please see section 17.7 for more information.

Question 11

Which of the following is a trait shared by mammals and reptiles that is not shared by the other groups of chordates?

Accepted Answer

The amnion is a critical membrane in the amniote egg,which was key for mammals conquest of land.Please see section 17.10 for more information.

Question 12

Octopuses and squids are cephalopods and are members of which group?

Accepted Answer

Cephalopods have a distinct head with large,sophisticated eyes.Please see section 17.5 for more information.

Question 13

Removal of what would destroy the support system of a sponge?

Accepted Answer

Spicules form the skeleton of a sponge.please see section 17.2 for more information.

Question 14

Flatworms are very thin and can exchange materials across their surface.Flatworms lack which of the following anatomical systems?

Accepted Answer

Flatworms do not need respiratory systems since their flat bodies have enough external surface area for gas exchange.Please see section 17.4 for more information.

Question 15

Earthworms have multiple hearts that pump blood throughout the body in vessels.They also ingest soil,digest the organic matter,and eliminate the indigestible particles as castings through an opening separate from that used for ingestion.Which earthworm systems allow this?

Accepted Answer

Earthworms can be surprisingly sophisticated in terms of their internal design.Please see section 17.6 for more information.

Question 16

Removal of what would destroy the filtering system of a sponge?

Accepted Answer

All of the parts of a sponge cooperate for filter feeding.Please see section 17.2 for more information.

Question 17

when asked to analyze a sample of marine life,you notice an animal which has an incomplete digestive tract,stinging cells,and which swims as a gently undulating bell.you conclude that you have found a cnidarian polyp.

Accepted Answer

Swimming cnidarians are usually medusas.Please see section 17.3 for more information.

Question 18

Segmentation is easy to observe in the cuticle of a nematode.

Accepted Answer

Nematodes do not have the obvious segmentation of annelids.Please see section 17.7 for more information.

Question 19

Which,if given as the answer to "Name a mammal," would be marked incorrect?

Accepted Answer

Penguins are birds.Please see section 17.11 for more information.

Question 20

Which were the first vertebrates to appear on land?

Accepted Answer

Amphibians were the first land vertebrates,and they still must return to fresh water to reproduce.Please see section 17.10 for more information.

Quiz 17: Evolution and Diversity of Animals

The early amphibian Tiktaalik either crawled or paddled in shallow tropical streams about 380 mya,during the late Devonian period.These shallow waters often became anaerobic.What selective advantage did Tiktaalik have under these conditions?

While walking through a hospital where fingers are reattached,you notice leeches being used on reattached fingers to improve circulation.You realize that annelids can be used in medicine.

If asked for an example of an arthropod and the arthropod trait it exemplified,you could present a centipede as an example of segmentation,since it has many of them.

If you were eating sea urchin sushi,starfish soup,and broiled shark,most,but not all,of your meal would be echinoderms.

Which of the following is a characteristic of annelids?

The observation that Tiktaalik had both gills and lungs suggests what?

Some animals are autotrophs.

Cnidarian bodies are one of two forms.A(n) consists of a sessile stalk with tentacles on one end.A(n) is a free-swimming,bell-shaped,"tentacles-down" body form with a single opening forming the mouth.

Nematodes are protected from environmental hazards in part by their cuticle.

Which of the following is a trait shared by mammals and reptiles that is not shared by the other groups of chordates?

Octopuses and squids are cephalopods and are members of which group?

Removal of what would destroy the support system of a sponge?

Flatworms are very thin and can exchange materials across their surface.Flatworms lack which of the following anatomical systems?

Earthworms have multiple hearts that pump blood throughout the body in vessels.They also ingest soil,digest the organic matter,and eliminate the indigestible particles as castings through an opening separate from that used for ingestion.Which earthworm systems allow this?

Removal of what would destroy the filtering system of a sponge?

when asked to analyze a sample of marine life,you notice an animal which has an incomplete digestive tract,stinging cells,and which swims as a gently undulating bell.you conclude that you have found a cnidarian polyp.

Segmentation is easy to observe in the cuticle of a nematode.

Which,if given as the answer to "Name a mammal," would be marked incorrect?

Which were the first vertebrates to appear on land?

Quiz 17: Evolution and Diversity of Animals

The early amphibian Tiktaalik either crawled or paddled in shallow tropical streams about 380 mya,during the late Devonian period.These shallow waters often became anaerobic.What selective advantage did Tiktaalik have under these conditions?

While walking through a hospital where fingers are reattached,you notice leeches being used on reattached fingers to improve circulation.You realize that annelids can be used in medicine.

If asked for an example of an arthropod and the arthropod trait it exemplified,you could present a centipede as an example of segmentation,since it has many of them.

If you were eating sea urchin sushi,starfish soup,and broiled shark,most,but not all,of your meal would be echinoderms.

Which of the following is a characteristic of annelids?

The observation that Tiktaalik had both gills and lungs suggests what?

Some animals are autotrophs.

Cnidarian bodies are one of two forms.A(n) ______ consists of a sessile stalk with tentacles on one end.A(n) ______ is a free-swimming,bell-shaped,"tentacles-down" body form with a single opening forming the mouth.

Nematodes are protected from environmental hazards in part by their cuticle.

Which of the following is a trait shared by mammals and reptiles that is not shared by the other groups of chordates?

Octopuses and squids are cephalopods and are members of which group?

Removal of what would destroy the support system of a sponge?

Flatworms are very thin and can exchange materials across their surface.Flatworms lack which of the following anatomical systems?

Earthworms have multiple hearts that pump blood throughout the body in vessels.They also ingest soil,digest the organic matter,and eliminate the indigestible particles as castings through an opening separate from that used for ingestion.Which earthworm systems allow this?

Removal of what would destroy the filtering system of a sponge?

when asked to analyze a sample of marine life,you notice an animal which has an incomplete digestive tract,stinging cells,and which swims as a gently undulating bell.you conclude that you have found a cnidarian polyp.

Segmentation is easy to observe in the cuticle of a nematode.

Which,if given as the answer to "Name a mammal," would be marked incorrect?

Which were the first vertebrates to appear on land?

Cnidarian bodies are one of two forms.A(n) consists of a sessile stalk with tentacles on one end.A(n) is a free-swimming,bell-shaped,"tentacles-down" body form with a single opening forming the mouth.