Question 1

Poriferans are ____.&#10;A) &#8203;Herbivores&#10;B) &#8203;filter feeders&#10;C) &#8203;Scavengers&#10;D) &#8203;Predators&#10;E) &#8203;carnivores

Accepted Answer

Poriferans, also known as sponges, are filter feeders. They filter plankton and other small particles from the water that passes through their bodies. They are not herbivores, carnivores, predators, or scavengers.

Question 2

Figure 24.10&#10;  &#10;The ____ is the first phylum with three germ layers.&#10;A) &#8203;Cnidaria&#10;B) &#8203;Platyhelminthes&#10;C) &#8203;Annelida&#10;D) &#8203;Arthropoda&#10;E) &#8203;Nematoda

Accepted Answer

Platyhelminthes, or flatworms, are the first phylum to exhibit triploblastic development, with three germ layers: the ectoderm, mesoderm, and endoderm.

Question 3

Cells of the outer surface of a sponge obtain nutrients by ____.&#10;A) &#8203;absorbing food that diffuses from the central cavity&#10;B) &#8203;capturing food in their microvilli&#10;C) &#8203;absorbing food distributed by amoeboid cells&#10;D) &#8203;phagocytosing bacteria and other small food items&#10;E) &#8203;poisoning small fish that contact them

Accepted Answer

Cells of the outer surface of a sponge obtain nutrients by absorbing food distributed by amoeboid cells, which transport nutrients throughout the sponge.

Question 4

Nephridia are ____.&#10;A) &#8203;circulatory organs&#10;B) &#8203;respiratory organs&#10;C) &#8203;excretory organs&#10;D) &#8203;endocrine organs&#10;E) &#8203;part of the nervous system

Accepted Answer

Nephridia are excretory organs found in many invertebrates, including annelids, mollusks, and arthropods. They filter waste products from the body fluids and eliminate them from the organism.

Question 5

Figure 24.6&#10;&#8203;&#10;   &#10;Refer to the illustration above of an adult sponge for questions.&#10;Nematocysts are used for ____.&#10;A) &#8203;reproduction&#10;B) &#8203;excretion&#10;C) &#8203;muscle action&#10;D) &#8203;circulation&#10;E) &#8203;defense

Accepted Answer

Nematocysts are specialized stinging cells found in cnidarians (such as jellyfish, corals, and sea anemones) that are used for defense against predators or prey capture. These cells contain a coiled, barbed filament that can be discharged to inject toxins into the victim.

Question 6

Figure 24.6&#10;&#8203;&#10;   &#10;Refer to the illustration above of an adult sponge for questions.&#10;In the accompanying figure, a cell type that distributes breakdown products of digestion to other cells in the sponge body is identified by the number ____.&#10;A) &#8203;1&#10;B) &#8203;2&#10;C) &#8203;3&#10;D) &#8203;4&#10;E) &#8203;5

Accepted Answer

Cell type number 2, called archaeocytes, are responsible for distributing the breakdown products of digestion to other cells in the sponge body. This process is important for the sponge's nutrition and overall health.

Question 7

Figure 24.10&#10;  &#10;In the accompanying figure, a feeding individual in the mature colony is identified by the number&#10;A) &#8203;1&#10;B) &#8203;2&#10;C) &#8203;3&#10;D) &#8203;4&#10;E) &#8203;5

Accepted Answer

The answer of Figure 24.10&#10;  &#10;In the accompanying figure,...

Question 8

Figure 24.4&#10;  &#10;All animals are ____.&#10;A) &#8203;multicellular, heterotrophic, and diploid&#10;B) &#8203;multicellular, heterotrophic, and haploid&#10;C) &#8203;unicellular, autotrophic, and diploid&#10;D) &#8203;multicellular, autotrophic, and haploid&#10;E) &#8203;unicellular, autotrophic, and haploid

Accepted Answer

All animals have a complex cell structure with multiple cells (multicellular), obtain their nutrients from other living organisms (heterotrophic), and have two sets of chromosomes in their cells (diploid). This differentiates them from unicellular organisms (such as bacteria) and autotrophic organisms (such as plants) that make their own food. Haploid organisms have only one set of chromosomes per cell, which is not the case for animals.

Question 9

Four of the following statements about cone snail venom are true. Which one is false?&#8203;&#10;A) &#8203;It is a potential source of new drugs of medical interest.&#10;B) &#8203;It may be lethal to humans.&#10;C) &#8203;It immobilizes the cone snail's prey.&#10;D) &#8203;It is lethal to cone snail prey.&#10;E) &#8203;Synthetic versions are used as a pain reliever in humans.

Accepted Answer

Synthetic versions of cone snail venom are not used as a pain reliever in humans.

Question 10

Animals most likely evolved most recently from ____.&#10;A) &#8203;colonial protists&#10;B) &#8203;fungi&#10;C) &#8203;amoebozoans&#10;D) &#8203;algae&#10;E) &#8203;cyanobacteria

Accepted Answer

The most widely accepted hypothesis is that animals evolved from colonial protists, specifically choanoflagellates.

Question 11

Figure 24.4&#10;  &#10;In the accompanying figure, a(n) ____ has body plan B.&#10;A) &#8203;Pseudocoelomate&#10;B) &#8203;eucoelomate&#10;C) &#8203;radially symmetrical&#10;D) &#8203;echinoderm&#10;E) &#8203;acoelomate

Accepted Answer

The answer of Figure 24.4&#10;  &#10;In the accompanying figure,...

Question 12

You find an organism that possesses chaetae and nephridia and exhibits coordinated movements of circular and longitudinal muscle. What is it most likely to be?&#8203;&#10;A) &#8203;Millipede&#10;B) &#8203;Tapeworm&#10;C) &#8203;Polychaete&#10;D) &#8203;Hookworm&#10;E) &#8203;flatworm

Accepted Answer

The answer of You find an organism that possesses chaetae...

Question 13

Figure 24.10&#10;  &#10;In the accompanying figure, an asexually reproducing individual is indicated by _____.&#10;A) &#8203;1&#10;B) &#8203;2&#10;C) &#8203;3&#10;D) &#8203;4&#10;E) &#8203;5

Accepted Answer

The answer of Figure 24.10&#10;  &#10;In the accompanying figure,...

Question 14

The AIDS drug AZT is derived from ____.&#10;A) &#8203;gorgonians&#10;B) &#8203;sponges&#10;C) &#8203;corals&#10;D) &#8203;snails&#10;E) &#8203;sea anemones

Accepted Answer

The answer of The AIDS drug AZT is derived from...

Question 15

In flatworms, the ____ is/are used to gather food.&#10;A) &#8203;nephridia&#10;B) &#8203;contractile vacuoles&#10;C) &#8203;Malpighian tubules&#10;D) &#8203;pharynx&#10;E) &#8203;flame cells

Accepted Answer

The answer of In flatworms, the ____ is/are used to...

Question 16

Figure 24.6&#10;&#8203;&#10;   &#10;Refer to the illustration above of an adult sponge for questions.&#10;In the accompanying figure, a cell type that helps to pull water through the sponge and strains out food particles is identified by the number ____.&#10;A) &#8203;1&#10;B) &#8203;2&#10;C) &#8203;3&#10;D) &#8203;4&#10;E) &#8203;5

Accepted Answer

The answer of Figure 24.6&#10;&#8203;&#10;   &#10;Refer to the...

Question 17

The ____ is an extension of the upper body wall in mollusks.&#10;A) &#8203;Radula&#10;B) &#8203;Mantle&#10;C) &#8203;gill&#10;D) &#8203;lung&#10;E) &#8203;siphon

Accepted Answer

The answer of The ____ is an extension of the...

Question 18

Which of the following is not a flatworm?&#10;A) &#8203;tape worm&#10;B) &#8203;ringworm&#10;C) &#8203;blood fluke&#10;D) &#8203;planaria&#10;E) &#8203;Bipalium

Accepted Answer

The answer of Which of the following is not a...

Question 19

Four of the following describe a bilaterally symmetrical animal. Which one is the exception?&#8203;&#10;A) &#8203;It has left and right sides.&#10;B) &#8203;It usually displays cephalization.&#10;C) &#8203;It produces mirror images regardless of the number of &#34;cuts&#34; through the central axis.&#10;D) &#8203;It usually has a three layer body plan.&#10;E) &#8203;It can be a deuterostome.

Accepted Answer

The answer of Four of the following describe a bilaterally...

Question 20

Which statement is true of deuterostomes?&#8203;&#10;A) &#8203;The second opening into the embryo becomes the anus.&#10;B) &#8203;They have two tissue layers.&#10;C) &#8203;The second opening into the embryo becomes the mouth.&#10;D) &#8203;The first opening into the embryo becomes the mouth.&#10;E) &#8203;They are typically radially symmetrical.

Accepted Answer

The answer of Which statement is true of deuterostomes?&#8203;&#10;A) &#8203;The...

Question 21

The ____ are the most diverse animal group.&#10;A) &#8203;Vertebrates&#10;B) &#8203;Insects&#10;C) &#8203;Humans&#10;D) &#8203;Protozoans&#10;E) &#8203;Mollusks

Accepted Answer

The answer of The ____ are the most diverse animal...

Question 22

Choose the most appropriate answer for each.
a.two pairs of legs per segment
b.Arachnids
c.planarians, flukes, tapeworms
d.Nematodes
e.snails, squids, clams
f.wheel animals
g.flagellated collar cells present
h.jellyfish and corals
i.crustaceans, ticks, and insects
j.polychaetes, earthworms, leeches
k.sea urchins, sea stars
chelicerates

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;two...

Question 23

Mosquito-transmitted roundworms cause a tropical disease called ____.&#10;A) &#8203;trematodiases&#10;B) &#8203;human echinococcosis&#10;C) &#8203;lymphatic filariasis&#10;D) &#8203;onchocerciasis&#10;E) &#8203;dracunculiasis

Accepted Answer

The answer of Mosquito-transmitted roundworms cause a tropical disease called...

Question 24

Choose the most appropriate answer for each.
a.two pairs of legs per segment
b.Arachnids
c.planarians, flukes, tapeworms
d.Nematodes
e.snails, squids, clams
f.wheel animals
g.flagellated collar cells present
h.jellyfish and corals
i.crustaceans, ticks, and insects
j.polychaetes, earthworms, leeches
k.sea urchins, sea stars
chelicerates

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;two...

Question 25

You find an animal that has a flexible cuticle, longitudinal muscles, a complete digestive system, and a false coelom. What is its most likely identity?&#8203;&#10;A) &#8203;anematode&#10;B) &#8203;acnidarian&#10;C) &#8203;aflatworm&#10;D) &#8203;an echinoderm&#10;E) &#8203;asponge

Accepted Answer

The answer of You find an animal that has a...

Question 26

The majority of crustaceans live in ____.&#10;A) &#8203;bodies of freshwater&#10;B) &#8203;tropical rain forests&#10;C) &#8203;marine habitats&#10;D) &#8203;Wetlands&#10;E) &#8203;Grasslands

Accepted Answer

The answer of The majority of crustaceans live in ____.&#10;A)...

Question 27

Four of the following are chelicerates. Which one is the exception?&#10;A) &#8203;Tick&#10;B) &#8203;mosquito&#10;C) &#8203;spider&#10;D) &#8203;horseshoe crab&#10;E) &#8203;scorpion

Accepted Answer

The answer of Four of the following are chelicerates. Which...

Question 28

Four of the following are major features of arthropods. Which is the exception?&#10;A) &#8203;jointed appendages&#10;B) &#8203;exoskeleton&#10;C) &#8203;paired segmental nephridia&#10;D) &#8203;specialized segments that are fused together&#10;E) &#8203;specialized sensory structures

Accepted Answer

The answer of Four of the following are major features...

Question 29

Choose the most appropriate answer for each.
a.two pairs of legs per segment
b.Arachnids
c.planarians, flukes, tapeworms
d.Nematodes
e.snails, squids, clams
f.wheel animals
g.flagellated collar cells present
h.jellyfish and corals
i.crustaceans, ticks, and insects
j.polychaetes, earthworms, leeches
k.sea urchins, sea stars
chelicerates

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;two...

Question 30

Four of the following are echinoderms. Which one is the exception?&#8203;&#10;A) &#8203;sea cucumber&#10;B) &#8203;sea star&#10;C) &#8203;urchin&#10;D) &#8203;brittle star&#10;E) &#8203;krill

Accepted Answer

The answer of Four of the following are echinoderms. Which...

Question 31

Rotifers take their name from ____.&#10;A) &#8203;their tumbling movements through the water&#10;B) &#8203;actions of cilia on their head&#10;C) &#8203;their radial symmetry&#10;D) &#8203;their elaborate digestive system&#10;E) &#8203;rotational action around the central body axis

Accepted Answer

The answer of Rotifers take their name from ____.&#10;A) &#8203;their...

Question 32

&#34;Tardigrada&#34; means ____.&#10;A) &#8203;tough exoskeleton&#10;B) &#8203;many proglottids&#10;C) &#8203;slow walker&#10;D) &#8203;short digestive system&#10;E) &#8203;Coelom

Accepted Answer

The answer of &#34;Tardigrada&#34; means ____.&#10;A) &#8203;tough exoskeleton&#10;B) &#8203;many proglottids&#10;C)...

Question 33

Animals of the phylum ____ are likely to have an exoskeleton.&#10;A) &#8203;Mollusca&#10;B) &#8203;Arthropoda&#10;C) &#8203;Nematoda&#10;D) &#8203;Chordata&#10;E) &#8203;Annelida

Accepted Answer

The answer of Animals of the phylum ____ are likely...

Question 34

A water-vascular system is characteristic of the phylum ____.&#10;A) &#8203;A water-vascular system is characteristic of the phylum ____.&#10;B) &#8203;Annelida&#10;C) &#8203;Chordata&#10;D) &#8203;Mollusca&#10;E) &#8203;Echinodermata

Accepted Answer

The answer of A water-vascular system is characteristic of the...

Question 35

During extended periods of dehydration, tardigrades ____.&#10;A) &#8203;enter suspended animation&#10;B) &#8203;migrate to the soil subsurface&#10;C) &#8203;enter small ponds and lakes&#10;D) &#8203;climb inside a plant leaf and form cysts&#10;E) &#8203;replace the water in their cells with salt

Accepted Answer

The answer of During extended periods of dehydration, tardigrades ____.&#10;A)...

Question 36

You stumble upon an unidentified arthropod with no antennae and eight legs. This organism is likely closely related to _____.&#10;A) &#8203;grasshoppers&#10;B) &#8203;ticks&#10;C) &#8203;crayfish&#10;D) &#8203;millipedes&#10;E) &#8203;trilobites

Accepted Answer

The answer of You stumble upon an unidentified arthropod with...

Question 37

You find a wormlike arthropod with a flattened body and carnivorous eating habits. It would most likely be identified as a ____.&#10;A) &#8203;Crustacean&#10;B) &#8203;Millipede&#10;C) &#8203;Spider&#10;D) &#8203;Trilobite&#10;E) &#8203;Centipede

Accepted Answer

The answer of You find a wormlike arthropod with a...

Question 38

While looking in a tide pool, you find an animal with a two-part shell and a large foot that it uses to bury itself in the sand. What is the likely identity of your find?&#10;A) &#8203;agastropod&#10;B) &#8203;achiton&#10;C) &#8203;abivalve&#10;D) &#8203;acephalopod&#10;E) &#8203;asnail

Accepted Answer

The answer of While looking in a tide pool, you...

Question 39

When arthropods molt, they may change in four of the following ways. Which one is the exception?&#10;A) &#8203;body form and maturity&#10;B) &#8203;Sex&#10;C) &#8203;body size&#10;D) &#8203;eating habits&#10;E) &#8203;sensory structures

Accepted Answer

The answer of When arthropods molt, they may change in...

Question 40

Which group of arthropods can be distinguished from other groups by its two pairs of antennae?&#10;A) &#8203;insects&#10;B) &#8203;millipedes&#10;C) &#8203;chelicerates&#10;D) crustaceans&#10;E) &#8203;trilobites

Accepted Answer

The answer of Which group of arthropods can be distinguished...

Question 41

Choose the most appropriate answer for each.
a.two pairs of legs per segment
b.Arachnids
c.planarians, flukes, tapeworms
d.Nematodes
e.snails, squids, clams
f.wheel animals
g.flagellated collar cells present
h.jellyfish and corals
i.crustaceans, ticks, and insects
j.polychaetes, earthworms, leeches
k.sea urchins, sea stars
chelicerates

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;two...

Question 42

__________ are multicelled heterotrophs without cell walls.

Accepted Answer

The answer of __________ are multicelled heterotrophs without cell walls....

Question 43

Some animals have no body symmetry or have __________ symmetry like spokes on a wheel.

Accepted Answer

The answer of Some animals have no body symmetry or...

Question 44

Choose the most appropriate answer for each.
a.two pairs of legs per segment
b.Arachnids
c.planarians, flukes, tapeworms
d.Nematodes
e.snails, squids, clams
f.wheel animals
g.flagellated collar cells present
h.jellyfish and corals
i.crustaceans, ticks, and insects
j.polychaetes, earthworms, leeches
k.sea urchins, sea stars
chelicerates

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;two...

Question 45

&#8203;Classification. Respond to the following statements in reference to the five animal phyla listed below.&#10;a.&#8203;Porifera&#10;b.&#8203;Cnidaria&#10;c.&#8203;Platyhelminthes&#10;d.&#8203;Nematoda&#10;e.&#8203;Annelida&#8203;&#10;This phylum contains the most primitive species of the animal kingdom in the list.

Accepted Answer

The answer of &#8203;Classification. Respond to the following statements in...

Question 46

Choose the most appropriate answer for each.
a.two pairs of legs per segment
b.Arachnids
c.planarians, flukes, tapeworms
d.Nematodes
e.snails, squids, clams
f.wheel animals
g.flagellated collar cells present
h.jellyfish and corals
i.crustaceans, ticks, and insects
j.polychaetes, earthworms, leeches
k.sea urchins, sea stars
chelicerates

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;two...

Question 47

&#8203;Classification. Respond to the following statements in reference to the five animal phyla listed below.&#10;a.&#8203;Porifera&#10;b.&#8203;Cnidaria&#10;c.&#8203;Platyhelminthes&#10;d.&#8203;Nematoda&#10;e.&#8203;Annelida&#8203;&#10;Tapeworms are members of this phylum.

Accepted Answer

The answer of &#8203;Classification. Respond to the following statements in...

Question 48

&#8203;Classification. Respond to the following statements in reference to the five animal phyla listed below.&#10;a.&#8203;Porifera&#10;b.&#8203;Cnidaria&#10;c.&#8203;Platyhelminthes&#10;d.&#8203;Nematoda&#10;e.&#8203;Annelida&#8203;&#10;Members of this group have a brain with nerve cords, have a saclike or branched gut, and lack a circulatory system.

Accepted Answer

The answer of &#8203;Classification. Respond to the following statements in...

Question 49

&#8203;Classification. Respond to the following statements in reference to the five animal phyla listed below.&#10;a.&#8203;Porifera&#10;b.&#8203;Cnidaria&#10;c.&#8203;Platyhelminthes&#10;d.&#8203;Nematoda&#10;e.&#8203;Annelida&#8203;&#10;This phylum has the greatest number of species.

Accepted Answer

The answer of &#8203;Classification. Respond to the following statements in...

Question 50

&#8203;Classification. Respond to the following statements in reference to the five animal phyla listed below.&#10;a.&#8203;Porifera&#10;b.&#8203;Cnidaria&#10;c.&#8203;Platyhelminthes&#10;d.&#8203;Nematoda&#10;e.&#8203;Annelida&#8203;&#10;The larval stage in this phylum has bilateral symmetry, whereas the adult stage exhibits radial symmetry.

Accepted Answer

The answer of &#8203;Classification. Respond to the following statements in...

Question 51

&#8203;Classification. Respond to the following statements in reference to the five animal phyla listed below.&#10;a.&#8203;Porifera&#10;b.&#8203;Cnidaria&#10;c.&#8203;Platyhelminthes&#10;d.&#8203;Nematoda&#10;e.&#8203;Annelida&#8203;&#10;Members of this phylum have a pseudocoelomic cavity.

Accepted Answer

The answer of &#8203;Classification. Respond to the following statements in...

Question 52

Choose the most appropriate answer for each.
a.two pairs of legs per segment
b.Arachnids
c.planarians, flukes, tapeworms
d.Nematodes
e.snails, squids, clams
f.wheel animals
g.flagellated collar cells present
h.jellyfish and corals
i.crustaceans, ticks, and insects
j.polychaetes, earthworms, leeches
k.sea urchins, sea stars
chelicerates

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;two...

Question 53

&#8203;Classification. Respond to the following statements in reference to the five animal phyla listed below.&#10;a.&#8203;Porifera&#10;b.&#8203;Cnidaria&#10;c.&#8203;Platyhelminthes&#10;d.&#8203;Nematoda&#10;e.&#8203;Annelida&#8203;&#10;Trilobites were members of this phylum.

Accepted Answer

The answer of &#8203;Classification. Respond to the following statements in...

Question 54

&#8203;Classification. Respond to the following statements in reference to the five animal phyla listed below.&#10;a.&#8203;Porifera&#10;b.&#8203;Cnidaria&#10;c.&#8203;Platyhelminthes&#10;d.&#8203;Nematoda&#10;e.&#8203;Annelida&#8203;&#10;&#8203;Although most members are enclosed by hardened shells, this phylum name literally means &#34;soft body.&#34;

Accepted Answer

The answer of &#8203;Classification. Respond to the following statements in...

Question 55

Choose the most appropriate answer for each.
a.two pairs of legs per segment
b.Arachnids
c.planarians, flukes, tapeworms
d.Nematodes
e.snails, squids, clams
f.wheel animals
g.flagellated collar cells present
h.jellyfish and corals
i.crustaceans, ticks, and insects
j.polychaetes, earthworms, leeches
k.sea urchins, sea stars
chelicerates

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;two...

Question 56

Choose the most appropriate answer for each.
a.two pairs of legs per segment
b.Arachnids
c.planarians, flukes, tapeworms
d.Nematodes
e.snails, squids, clams
f.wheel animals
g.flagellated collar cells present
h.jellyfish and corals
i.crustaceans, ticks, and insects
j.polychaetes, earthworms, leeches
k.sea urchins, sea stars
chelicerates

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;two...

Question 57

Choose the most appropriate answer for each.
a.two pairs of legs per segment
b.Arachnids
c.planarians, flukes, tapeworms
d.Nematodes
e.snails, squids, clams
f.wheel animals
g.flagellated collar cells present
h.jellyfish and corals
i.crustaceans, ticks, and insects
j.polychaetes, earthworms, leeches
k.sea urchins, sea stars
chelicerates

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;two...

Question 58

Choose the most appropriate answer for each.
a.two pairs of legs per segment
b.Arachnids
c.planarians, flukes, tapeworms
d.Nematodes
e.snails, squids, clams
f.wheel animals
g.flagellated collar cells present
h.jellyfish and corals
i.crustaceans, ticks, and insects
j.polychaetes, earthworms, leeches
k.sea urchins, sea stars
chelicerates

Accepted Answer

The answer of Choose the most appropriate answer for each.&#8203;&#10;a.&#8203;two...

Question 59

&#8203;Classification. Respond to the following statements in reference to the five animal phyla listed below.&#10;a.&#8203;Porifera&#10;b.&#8203;Cnidaria&#10;c.&#8203;Platyhelminthes&#10;d.&#8203;Nematoda&#10;e.&#8203;Annelida&#8203;&#10;&#8203;&#34;Wheel animals&#34; are in this phylum.

Accepted Answer

The answer of &#8203;Classification. Respond to the following statements in...

Question 60

&#8203;Classification. Respond to the following statements in reference to the five animal phyla listed below.&#10;a.&#8203;Porifera&#10;b.&#8203;Cnidaria&#10;c.&#8203;Platyhelminthes&#10;d.&#8203;Nematoda&#10;e.&#8203;Annelida&#8203;&#10;Members of this phylum have a brain with a ventral nerve cord, a complete gut, and a circulatory system that is usually closed.

Accepted Answer

The answer of &#8203;Classification. Respond to the following statements in...

Question 61

__________, such as jellyfishes, corals, and sea anemones, are radially symmetrical.

Accepted Answer

The answer of __________, such as jellyfishes, corals, and sea...

Question 62

In __________, an anus forms first.

Accepted Answer

The answer of In __________, an anus forms first....

Question 63

Animals most likely evolved from a colony similar to __________, a type of protist.

Accepted Answer

The answer of Animals most likely evolved from a colony...

Question 64

Explain how insects are both essential for, and detrimental to agriculture

Accepted Answer

The answer of Explain how insects are both essential for,...

Deck 24: Animal Evolution - the Invertibrates