DIVERSITY OF ANIMALS

Question 1

Animals are ________, meaning they are made of many cells with a nucleus. They share some common characteristics, like being ________ (meaning they need to eat other organisms for energy) and having specialized tissues.

Answer 1

Multicellular eukaryotes, heterotrophic

Question 2

Understanding and classifying animals helps us _____ and benefit from the diversity of life on Earth.

Answer 2

conserve biodiversity

Question 3

2 Major Features of Animals

Answer 3

Complex Tissue Structure and Modes of Reproduction

Question 4

Animals have complex tissues with specialized cells, unlike plants and fungi. This allows for _________ of movement (muscle tissue) and _______ (nerve tissue).

Answer 4

coordination and communication

Question 5

Some animals that reproduce asexually

Answer 5

Sea stars and sea anemones

Question 6

How are animals classified? (4)

Answer 6

1. Body Symmetry
2. Embryonic Development
3. Presence or Absence of a Coelom
4. Embryonic Development of the Mouth

Question 7

Animals with no symmetry, like sponges.

Answer 7

Asymmetrical

Question 8

Animals with body parts arranged around a central axis, like jellyfish and sea anemones.

Answer 8

Radially Symmetrical

Question 9

Animals with a left and right side that are mirror images, like humans and butterflies.

Answer 9

Bilaterally Symmetrical

Question 10

Animals with two germ layers (endoderm and ectoderm)

Answer 10

Diploblast

Question 11

Examples of diploblast animals

Answer 11

jellyfish and sea anemones

Question 12

Animals with three germ layers (endoderm, ectoderm, and mesoderm), like humans and butterflies.

Answer 12

Triploblast

Question 13

Fluid-filled body cavity

Answer 13

coelom

Question 14

Animals with no coelom, like flatworms.

Answer 14

Acoelomates

Question 15

Animals with a true coelom, like earthworms and humans.

Answer 15

Eucoelomates

Question 16

Animals with a false coelom, like roundworms.

Answer 16

Pseudocoelomates

Question 18

Eucoelomates are further divided into _______ and ________ based on which opening of the digestive tract develops first.

Answer 18

protostomes and deuterostomes

Question 19

The mouth develops first, like arthropods and mollusks

Answer 19

Protostomes

Question 20

The anus develops first, like chordates and echinoderms

Answer 20

Deuterostomes

Question 21

animals that lack a backbone and a defined vertebral column

Answer 21

invertebrates

Question 22

__% of animals are invertebrates

Answer 22

97%

Question 24

Key groups of invertebrates

Answer 24

●Porifera (Sponges)
●Cnidaria (Jellyfish, Sea Anemones, Corals)
●Nematoda (Roundworms)
●Annelida (Segmented Worms)
●Mollusca (Snails, Clams, Octopuses)
●Arthropoda (Insects, Crustaceans, Spiders):
●Echinodermata (Starfish, Sea Urchins, Sea Cucumbers)

Question 25

Simple, filter-feeding animals that lack true tissues.

Answer 25

Porifera (Sponges)

Question 26

Radially symmetrical animals with stinging cells called cnidocytes.

Answer 26

Cnidaria

Question 27

Unsegmented, cylindrical worms with a pseudocoelom.

Answer 27

Nematoda (Roundworms)

Question 28

Segmented worms with a true coelom, like earthworms and leeches.

Answer 28

Annelida (Segmented Worms)

Question 29

Soft-bodied animals with a muscular foot and a mantle that may secrete a shell.

Answer 29

Mollusca (Snails, Clams, Octopuses)

Question 30

Segmented animals with a hard exoskeleton and jointed appendages.

Answer 30

Arthropoda (Insects, Crustaceans, Spiders)

Question 31

Radially symmetrical marine animals with a water vascular system.

Answer 31

Echinodermata (Starfish, Sea Urchins, Sea Cucumbers)

Question 32

Animals that have a vertebral column

Answer 32

Vertebrates

Question 33

Key groups of Vertebrates

Answer 33

Fishes Amphibians Reptiles Birds Mammals

Question 34

The earliest vertebrates, with jawless ______ being the most primitive.

Answer 34

Fishes

Question 35

Tetrapods (four-limbed animals) that evolved from fish and have a moist, permeable skin.

Answer 35

Amphibians

Question 36

Tetrapods that evolved from amphibians and have scaly skin and lay eggs.

Answer 36

Reptiles

Question 37

Feathered, endothermic tetrapods that evolved from reptiles and have wings for flight.

Answer 37

Birds

Question 38

Hairy, endothermic tetrapods that evolved from reptiles and have mammary glands for producing milk.

Answer 38

Mammals

Question 39

Evolution of Humans

Answer 39

◇Proto-primates ◇True Primates ◇Hominins ◇Homo sapiens

Question 40

The earliest primate-like mammals, which were similar to squirrels and tree shrews.

Answer 40

Proto-primates

Question 41

Evolved from proto-primates and included prosimians (like lemurs) and anthropoids (like monkeys and apes).

Answer 41

True primates

Question 42

Evolved from apes and included species that were more closely related to humans than to chimpanzees, like Australopithecus and Homo.

Answer 42

Hominins

Question 43

The species that includes modern humans, which evolved from earlier hominin species.

Answer 43

Homo Sapiens