Animalia

Question 1

Characteristics of kingdom Animalia

Answer 1

eukaryotes
multicellular
heterotrophic - Depend on other organisms for nutrients
Animal cells lack cell walls
Most are motile (at some point in their life)

Question 2

Different ways animals are organized

Answer 2

Body Plans
Levels of Organization
Body Symmetry
Embryological Development
Segmentation
Limbs

Question 3

Body plans

Answer 3

A set of morphological features common to many members of a phylum of animals.

Question 4

Levels of organization

Answer 4

Cells are the simplest level of organization
Cells become specialized and form tissues
tissue → a group of cells that perform a particular function
Groups of tissues can form organs which then work together to form organ systems

Question 5

Body symmetry(Asymmetrical)

Answer 5

No Symmetry
Examples → sponges(phylum porifera)

Question 6

Body symmetry(Radial)

Answer 6

Body parts are arranged around an imaginary central axis
Cutting the animal along the axis results in identical pieces
Lack a head and a back
Examples → coral polyp

Question 7

Body symmetry(Bilateral)

Answer 7

Most common
Left and Right sides are are mirror images
Cephalization → Development of a head with sensory organs
Allows animals to detect predators and prey

Question 8

Embryological Development

Answer 8

Animals begin as zygote (fertilized egg)
Zygote form a Blastula (hollow ball of cells)
In-folding of cells results in the formation of a blastopore
Protostome → if blastopore develops into a mouth
Deuterostome → if blastopore develops into an anus

Question 9

Segmentation

Answer 9

Segment → the repeating part of an animal’s body
Can have many similar repeating segments
Can have different repeating segments
head, thorax and abdomen of insects

Question 10

limbs

Answer 10

Paired Limbs → external appendages that extend from the body
Used for:
movment
defense
Gathering sensory information

Question 11

Existence of a Backbone

Answer 11

Existence of a Backbone:

Vertebrates → animals with a backbone (5%)
Includes fish, amphibians, reptiles, birds, mammals, humans
Make up most of the Chordate Phylum

Invertebrates → animals without a backbone (95%)
Includes: seas stars, sea urchins, earthworms, sponges, jellyfish
, lobsters, crabs, insects, spiders, snails, clams, and squid.