variation and classification (invertebrates)

Question 1

what are invertebrates?

Answer 1

animals without a backbone

Question 2

invertebrates usually have:

Answer 2

exoskeleton, soft bodies, wings, antennas, shells, segmented bodies, wings

Question 3

name three major invertebrate groups

Answer 3

mollusks, arthropods and annelids

Question 4

features of annelids?

Answer 4

segmented bodies, no limbs, bristles

Question 5

examples of annelids:

Answer 5

earthworm, leeches

Question 6

features of mollusks?

Answer 6

soft bodies, muscular foot (for movement)

Question 7

examples of mollusks?

Answer 7

snails, slugs, octopus

Question 8

what four groups are arthropods divided into

Answer 8

insects, crustaceans, myriapods and arachnids

Question 9

features of arthropods?

Answer 9

jointed legs, segmented bodies and exoskeleton

Question 10

insects have features such as:

Answer 10

exoskeleton
3 pairs of jointed legs 
3 parts (head thorax abdomen)
2 pairs of wings attached to the thorax
1 pair of antenna 
legs attached to the thorax

Question 11

examples of insects:

Answer 11

ant, bee, ladybug, mosquito

Question 12

arachnid features:

Answer 12

4 pairs of jointed legs
no wings
no antennas

Question 13

features of a crustacean:

Answer 13

tough exoskeleton
more than 4 pairs of jointed legs
2 pairs of antenna

Question 14

myriapod features:

Answer 14

many pairs of jointed legs

one pair of antenna

Question 15

examples of crustaceans?

Answer 15

crab
lobster
shrimp

Question 16

examples of myriapods?

Answer 16

centipede

millipede

Question 17

examples of arachnids?

Answer 17

scorpion

spider

Question 18

what percentage of animals are invertebrates?

Answer 18

90%