Chapter 17 Evolution Of Animals Part 1

Question 1

In 2003, anthropologists discovers bones of some highly unusual people from where?
Dating back to when?

Answer 1

Indonesian island of Flores

Dating back to 18,000 years

Question 2

What made the unusual people on the Indonesian islands different?

Answer 2

Shorter,

Would stand about waist high to a woman

Question 3

Skeptical scientists suggested that the bones were from _________ with diseases that caused ___________

Answer 3

Homo sapiens

Skeletal malformations

Question 4

This amazing diversity arose through hundreds of millions of years of evolution as ________ shaped animal adaptations to earths many environments.

Answer 4

Natural Selection

Question 5

Animals are what?

Answer 5

Eukaryotic

Multicellular

Heterotropic

Question 6

Organisms that obtain nutrients by eating and are able to digest food with their bodies

Answer 6

Animals

Question 7

Animal cells _____ that provide strong support in bodies of plants and fungi

Answer 7

Lack cell wallls

Question 8

Most animals have

Answer 8

Muscle and nerve cells

Question 9

These cells are used for movement

Answer 9

Muscle cells

Question 10

These cells are used to control the muscles

Answer 10

Nerve cells

Question 11

Most animals are ___ and reproduce __

Answer 11

Diploid and reproduce sexually

Question 12

In the life cycle of a sea star, the ____ undergoes a major change of body form called ____

Answer 12

Larva

Metamorphosis

Question 13

Scientist hypothesize that animals evolved from a

Answer 13

Colonial flagellates protist

Question 14

What suggests a much earlier origin for animals?

Answer 14

Molecular data

Question 15

Cambrian explosion may have been ignited by

Answer 15

Complex predator-pre relationships

Atmospheric oxygen

Question 16

A set of master control genes

Answer 16

Genetic framework

Question 17

Historically biologist have categorized animals by ___ general features of body structures

Answer 17

Body plan

Question 18

Allowed evolutionary biologists to modify and refine groups

Answer 18

Genetic data

Question 19

Lack true tissues

Answer 19

Sponges

Question 20

Refers To animals that are identical all around the central axis

Answer 20

Radical symmetry

Question 21

Exist where there is only one way to split the animal into equal halves

Answer 21

Bilateral symmetry

Question 22

What helped lead to more complex animals?

Answer 22

Evolution of body cavities

Question 23

A fluid filled space separating the digestive tract from outer body wall

Answer 23

Body cavity

Question 24

Animals without backbones

Answer 24

Invertebrates

Question 25

95% of the animal kingdom

Answer 25

Invertebrates

Question 26

Stationary animals

Answer 26

Sponges

Question 27

Sponges evolved very early from

Answer 27

colonial protists

Question 28

The body of a sponge resembles

Answer 28

Sac perforated with holes

Question 29

Move water through the pores into a central cavity and then out of the sponge through a larger opening

Answer 29

Choanocyte cells

Question 30

Characterized by the presence of body tissues, radical symmetry, tentacles with stinging cells

Answer 30

Cnidarians

Question 31

The basic body plan of a cnidarian is a sac with a central digestive compartment

Answer 31

Gastrovascular cavity

Question 32

The body plan of Cnidarians has two variations

Stationary ____ and floating ___

Answer 32

Polyp and Medusa

Question 33

Cnidarians are

Answer 33

Carnivores

Question 34

Cnidarians are carnivores that use ___ arranges in a ring ____ to capture prey and push into the ____,where digestion begins

Answer 34

Tentacles

Around the mouth

Gastrovascular cavity

Question 35

Stinging cells are

Answer 35

Cnidocytes

Question 36

Cnidocytes our stinging cells function

Answer 36

Defense

Prey capture

Question 37

Soft body animals usually protected by a hard shell

Answer 37

Molluscs

Question 38

Many molluscs feed by extending a file like organ called

Answer 38

Radula

Question 39

To scrape up food

Answer 39

Radula

Question 40

Molluscs are mostly

Answer 40

Marine animals

Question 41

Molluscs have a similar body plan with three main parts

Answer 41

Muscular foot

Visceral mass

Mantle

Question 42

Molluscs usually used for movement

Answer 42

Muscular foot

Question 43

Molluscs have this which contains most of the internal organs

Answer 43

Visceral mass

Question 44

Molluscs have a fold of tissue that secretes the s present

Answer 44

Mantle

Question 45

There are 3 main groups of molluscs

Answer 45

Gastropods

Bivalves

Cephalopods

Question 46

Includes snails

Answer 46

Gastropods

Question 47

Includes clams, oysters, mussels, and scallops

Answer 47

Bivalves

Question 48

She’ll divided into two halves hundred together

Answer 48

Bivalves

Question 49

Head+foot

Answer 49

Cephalopods

Question 50

Include squids and octopus and are all marine animals

Answer 50

Cephalopods

Question 51

Their bodies are fast and while

Answer 51

Cephalopods

Question 52

Large brains and sophisticated sense organs

Answer 52

Cephalopods

Question 53

Few species with large, heavy shells, but in most the shell is small and internal

Answer 53

Cephalopods

Question 54

Flat worms phylum

Answer 54

Playyhelminthes

Question 55

Simplest animals with bilateral symmetry

Answer 55

Flatworms

Question 56

Ribbon like

Answer 56

Flatworms

Question 57

Range from about 1mm to 20mm

Answer 57

Flatworms

Question 58

Flatworms include forms that are

Answer 58

Parasites