Biodiversity- (11) Animals

Question 1

how many different phyla in the animal kingdom

Answer 1

35 (50% worms)

Question 2

What are the 3 factors of the animal kingdom

Answer 2

Eukaryotic+ Multicellular
Hetertrophs
Mobile(in atleast one stage of life)

Question 3

Explain vertabres and invertabres

Answer 3

Invertabres- no backbone (90% of animals)
vertabres- (Backbone 5% of animals)

Question 4

what are some other ways to classify animals?

Answer 4

Levels of organization, number of body layers, symmetry and body plans, movemnt, and reproduction

Question 5

explain levels of organization

Answer 5

Type + complexity of cells + organ systems

Circulatory, respiratory, digestive, nervous

Question 6

the 3 animal body layers

Answer 6

Ectoderm, mesoderm, endoderm

Question 7

whats the ectoderm

Answer 7

(outer layer)- develop into skin/nerves/sense organs (eyes, Ears)

Question 8

whats the mesoderm

Answer 8

(middle layer)- develop into muscle/kidney/blood/reproductive organs

Question 9

Endoderm?

Answer 9

(inner layer)- develop into lungs/liver/pancreas/bladder

Question 10

Symmetry

Answer 10

Asymetrical- no symmetry
Radial- can be divided along central axis
Bilateral- can be divided into mirror halves (most vertabres)

Question 11

Body plans- Body cavaties

Answer 11

Based on prescence of ceolom

Question 12

whats ceolom

Answer 12

provides space for organ systems + structure for muscle attatchment

Question 13

Body plans: segmentation

Answer 13

Division of body into repetetive sections (worms, scorpions). helps with mobility and if a section gets damaged others can still function properly

Question 14

movement

Answer 14

most animals move via muscle/ nerve tissue. some animals (sponges/ anemones) are sessile- stationary as adults

Question 15

two types of reproduction in animals

Answer 15

internal (gametes combine inside)
external (gametes combine outside (fish- jellyfish)

Question 16

5 types of invertebrate animals

Answer 16

1) Sponges/ cnidarians
2)worms
3)molluscs(shell)
4)Echinoderms
5) Arthropods

Question 17

what are echinoderms

Answer 17

marine animals- hard or spiny skin or covering

Question 18

what are arthropods

Answer 18

segmented bodies which are protected by a chemical polymer called chitin.

Question 19

what defines a vertabrate animal

Answer 19

prescence of notochord (vertabral column) +dorsal nerve (spinal chord in humans

Question 20

5 vertabrate animals

Answer 20

fish, amphibians, reptiles, birds, mammals

Question 21

fish

Answer 21

50% of vertabrates, evolved into tetrapods (have limbs)

Question 22

amphibians

Answer 22

First tetrapods. can live a portion of lives on land.
-use skin for gas exchange, external reproduction

Question 23

reptiles

Answer 23

scales prevent dehydration. shelled eggs, lungs, 3 chambered heart, external reproduction.

Question 24

birds

Answer 24

endothermic (metabolic heat maintains temp), 4 chambered heart.

Question 25

mammals

Answer 25

mammary glands, hair/ fur

Question 26

3 groups of mammals

Answer 26

monotremes, marsupials, placental

Question 27

monotremes

Answer 27

egg laying mammals, platypus and echidna in australia

Question 28

marsupials

Answer 28

pouched mammals, koalas and kangaroos, opposums

Question 29

placental

Answer 29

have a placenta, bears, bats, whales, primates, humans.