Chapter 10 quiz

Most animals fall into one of how many phyla?

9

What is a key morphological difference between fish and amphibians?

Amphibians have strong muscular and skeletal systems to support their body on land.

Which one of the following is a defining characteristic of animals but not plants

Animals, but not plants, are heterotrophs

What defines radial symmetry?

Any plane of symmetry passing through the center of the organism splits it into equal halves.

Which worm phylum lacks body segmentation?

Both flatworms and roundworm

Which anthropoid subgroup includes the spiders?

Insects

Compared to mammals and reptiles, what characteristic prevents amphibians from surviving far from water?

Their eggs do not have an amnion which prevents them from drying out.

What happened during the Cambrian explosion?

There was a rapid diversification of animal forms.

Which of the following best describes cnidarians?

They have radial body symmetry, tissues, and stinging cells.

What is the function of the lateral line system?

To detect movement in the surrounding water

How do bony fish regulate buoyancy?

With an air-filled swim bladder

Serial repetition of segments is a defining characteristic of which worm phylum?

annelids

Which of the following phyla is the most diverse and numerous of all animal phyla

arthropods

Which type of worm lacks a complete digestive tract?

flatworms

All mammals

have mammary glands

Which group of fishes evolved first?

jawless fishes

Which is most closely related to the hagfishes?

lampreys

Sponges are mostly found in

marine ecosystems

Which subgroup of mammals raises their young in pouches?

marsupials

Some restaurants serve seafood platters that contain oysters, mussels, and clams. Such platters therefore consist of ________.

mollusks

Being a heterotroph means ________.

obtaining your food by eating other organisms

Which of the following group is most closely related to mammals?

reptiles

Which chordate trait evolved first?

skull and backbone

A key characteristic of echinoderms is

their endoskeleton

Most chordates are ________.

vertebrates