chapter 4.4 'arthropods'
why is an arthropod in the most danger when it is molting?
because its soft body is exposed, and vulnerable to attack from a predator
an invertebrate with a segmented body, jointed legs, and an external skeleton
arthropod
give two examples of a jawless fish
hagfish and lamprey
cartilaginous
having a skeleton composed mostly of cartilage
name the three groups of arthropods that we looked at
1) insects
2) crustaceans
3) arachnids
is the following statement true or false? why?
"all insects live on land"
false- they live on land, and in water
exoskeleton
a strong, rigid outer layer that covers and protects the body of some invertebrate animals, such as arthropds
describe the difference between a vertebrate and a vertebrae?
vertebrae- the hollow bones that make up the backbone
vertebrate- any animal that has a backbone
an internal support system that grows along with an animal
endoskeleton
which group of fish will you find scales on?
bony fish
which group of arthropods is most like to live in a large social group? give an example
insects- like bee and ants
the hind portion of the body behind the thorax in an invertebrate
abdomen
which group of fish feed like the description below?
"they bite into another animal with their teeth, and suck and fluid and flesh out"
jawless fish
scale
one of the thin, small, overlapping plates that cover most fish and reptiles and some other animals
nutrients- from the yolk in the egg casing
oxygen- from water, as the egg casing is soft and allows water to pass thorugh
is the following statement true or false? why?
"both spiders and centipedes produce silk to capture food."
false- they are both predator's, but only spiders produce silk.
thorax
the middle section of an arthropod's body
why are vertebrae so important for vertebrates?
because they provide support and protection for the spinal cord, which carries all of the signals in the body.
any of a large group of animals that have a backbone
vertebrate
draw and label an insect on the board
must have
1) three pairs of legs
2) a head, thorax and abdomen
3 )1 pair of antennae
put the three stages of complete metamorphosis in the correct order. describe each one;
pupa, larva, adult
1) larva- spends most of its time eating
2) pupa- develops inside a protective casing
3) adult- fully mature, and can produce a new generation
a small arthropod with six legs, three body segments, and usually two to four wings
insect
what three adaptation do fish have for living in water? describe them
1) gills- to take oxygen from the water into their blood
2) swim bladder- to control the depth that they swim at
3) lateral line- sensory organ to help the fish sense when objects and organisms are near them
vertebrae
what is the main advantage of an endoskeleton over an exoskeleton?
the endoskeleton allows the animal more flexibility