Arthropods 1
What is an arthropod?
An invertebrate with a segmented body covered with a hard outer skeleton.
Define metamorphosis
A process in which an insects appearance and body systems may change dramatically.
True or False
Silkworms are spider larvae.
False.
Define vertebrates.
Animals and humans with backbones.
What is the most diverse group of vertebrates?
Fish
Give an example of an arthropod.
Insects, crustaceans, arachnids.
Name the 3 stages metamorphosis
Larva, pupae, adult
What are spiracles?
Small openings in the exoskeleton that allows some arthropods to obtain oxygen.
What main characteristic (difference) do vertebrates have that invertebrates don't have?
Endoskeleton.
Name the 4 main characteristics of fish.
Vertebrae, gills, swim bladder, lateral line.
What is an exoskeleton and where is it found?
It is a hard covering made of chitin and is found on the outside of the arthropod.
True or False
Crustaceans have a circulatory systems that includes a heart and blood vessels.
False.
Crustaceans have no blood vessels.
What are book lungs?
Book lungs are moist pockets with folds used in some spiders for respiration.
What does an endoskeleton provide?
Endoskeleton provides an internal support system that grows which allows more flexibility and ways of moving than exoskeletons do.
Name the 3 classes (divisions) of fish.
Jawless, Cartilaginous, and Bony
What is molting and why does it happen?
Molting is the shedding of the exoskeleton and it happens because the arthropod is growing.
Arachnids are arthropods. Arachnids always have 4 pairs of legs. How many body segments to they have?
They have 2 body segments. They don't have antennae.
What is a swim bladder?
Allows the fish to adjust how high or low it floats.
Where is the vertebrae found?
What are the differences between the Jawless, Cartilaginous, and Bony fish?
Eat by attaching and sucking out nutrients from a host fish, soft bones made of cartilage, have a hard bone structure and most have a hard outer covering called scales.
Name the body parts of an insect.
Head, thorax, abdomen, legs, antennae
Which arachnid group is the strongest?
Spiders
What is a lateral line and where is it found?
It is an organ in the sensory systems that allows fish to sense objects and organisms that are nearby.
How might the offspring of fish who lay eggs differ from the fish whose eggs develop inside of the female fish?
The survival rate is higher for the fish that are born from the mother fish.
How do soft cased fish eggs help the embryo?
Water and nutrients can flow in and out of the case providing water and oxygen which the yolk provides the fish with food.