ENT 101 midterm 1 ACTUAL UPDATED QUESTIONS AND CORRECT ANSWERS
insect represent what percent of all known species over 50%
vertebrates have an internal skeleton (endoskeleton) with vertebrae arranged into a spinal
column
invertebrates no vertebrae (no internal support structure) they have support outside their body
(exoskeleton)
two functions of the vertebral column 1. provides support against gravity
2. allows for large body sizes
vertebrate animals (5) 1. amphibians
2. fish
3. reptiles
4. birds
5. mammals
more than 90% of all species are what invertebrates
, most recognized species of invertebrates arthropods
arthron joint
podos feet
arthropod means what jointed appendages
two functions of jointed appendages 1. locomotion
2. modified for different structures (antennae, mouth parts, reproductive
structures)
how many known species of arthropods are there about 1.2 million
arthropods include what groups (6) 1. crabs
2. lobsters
3. spiders
4. scorpion
5. millipedes
6. centipedes
7. insects
5 characteristics of arthropods 1. bilateral symmetry
2. segmented bodies
3. ventral nerve cords
4. dorsal blood vessels
5. exoskeletons
bilateral symmetry split along the anterior-posterior axis (forming a single plane of symmetry,
separating into left and right sides)
jellyfish almost have perfect of what type of symmetry radial
3 main body axis 1. dorsal/ventral
2. anterior/posterior
3. lateral
dorsal ventral axis from top to bottom
anterior posterior axis from front to back
insect represent what percent of all known species over 50%
vertebrates have an internal skeleton (endoskeleton) with vertebrae arranged into a spinal
column
invertebrates no vertebrae (no internal support structure) they have support outside their body
(exoskeleton)
two functions of the vertebral column 1. provides support against gravity
2. allows for large body sizes
vertebrate animals (5) 1. amphibians
2. fish
3. reptiles
4. birds
5. mammals
more than 90% of all species are what invertebrates
, most recognized species of invertebrates arthropods
arthron joint
podos feet
arthropod means what jointed appendages
two functions of jointed appendages 1. locomotion
2. modified for different structures (antennae, mouth parts, reproductive
structures)
how many known species of arthropods are there about 1.2 million
arthropods include what groups (6) 1. crabs
2. lobsters
3. spiders
4. scorpion
5. millipedes
6. centipedes
7. insects
5 characteristics of arthropods 1. bilateral symmetry
2. segmented bodies
3. ventral nerve cords
4. dorsal blood vessels
5. exoskeletons
bilateral symmetry split along the anterior-posterior axis (forming a single plane of symmetry,
separating into left and right sides)
jellyfish almost have perfect of what type of symmetry radial
3 main body axis 1. dorsal/ventral
2. anterior/posterior
3. lateral
dorsal ventral axis from top to bottom
anterior posterior axis from front to back
