1.6 Invertebrates Flashcards

Question 1

Q

all animals share one characteristic

Answer

A

feed on organic molecules

Question 2

Q

vertebrate

Answer

A

have backbone

Question 3

Q

invertebrate

Answer

A

no backbone

Question 4

Q

4 groups of invertebrates + examples

Answer

A

nematodes - hookworms

annelid - earthworms

mollusc - snails

arthropods

crustacea - crabs
myriapods - milipedes
insects - flies
arachnids - spiders

Question 5

Q

nematodes

Answer

A

parasites

mouth sucks blood
long muscles wriggle
long, thin body X washed out
mucus resists stomach acid
large sex organs - many sperm, eggs
anus

Question 6

Q

annelids

Answer

A

long, segmented body
chaetae (bristles on segments for moving)

mouth - bite dead leaves
citellum - binds 2 tgt for sexual reproduction
cylindrical
mucus keeps moist

Question 7

Q

molluscs

Answer

A

hard shell, soft body, no limbs

shell - hardened by calcium carbonate
body - can withdraw entirely into shell
eye on tentacles
mouthparts scrape at food
foot - muscle + slimy covering for creeping

Question 8

Q

annelid vs nematode vs mollusc

Answer

A

body covering:
hard & slightly waterproof // soft, not waterproof // soft, shell saves water

visible segments:
yes // no // no

movement:
chaetae // wriggles but lives in one place // creeps around

feeding:
herbivores // parasites // most herbivores, some carnivores

Question 9

Q

arthropods

Answer

A

most numerous

insects, crustacea, arachnids, myriapods

Question 10

Q

crustacea

Answer

A

hard, serrated claw edge
jointed limbs
eyes
carapace (thick, hard shell)
Gill under shell

Question 11

Q

myriapods

Answer

A

antennae sense chemical & moisture in dark
segments help wriggle about
mouthparts bite (milipedes - vegetation, centipedes - other animals)
hard exoskeleton
walking legs w joints, internal muscles
waterproof body covering

Question 12

Q

insects

Answer

A

metamorphosis

3 segments head thorax abdomen
antennae sense chemicals
specialized mouthparts for feeding
compound eyes detect food &amp; predators
3 pairs of legs @thorax
2 pairs of wings

Question 13

Q

metamorphosis

Answer

A

allows different stages w diff food sources, specialized for different things,..

Question 14

Q

arachnids

Answer

A

head + thorax = cephalothorax
simple eyes >1 pair
spinneret
powerful piercing jaws

1.6 Invertebrates Flashcards

Know the difference between a vertebrate and invertebrate animal Describe the main characteristics of 4 invertebrate groups Distinguish between different classes of arthropods Understand the importance of metamorphosis in insects (14 cards)