and Answers | Professional Prep | Grade A+
• What were the first insects like? -✓✓tiny, wingless, softbodied
• were relatives of most modern insects here before dinos? -✓✓yes
• Aristotle and Pliny's insect counts -✓✓wayyyy underestimate
• How many insect species have been identified? -✓✓around 1 million
• How long have insects been around? -✓✓about 400 million years
• How are insects similar to NC? -✓✓they are the first in flight!
• Do insects outnumber everything else? -✓✓yes.
• What kingdom and phylum are insects in? -✓✓Animalia, arthropoda
• 4 Characteristics of Arthropods -✓✓jointed appendages, bilateral symmetry,
chitinous exoskeleton, segmentation
• Name 5 classes of Arthropod -✓✓Crustacea, chilopoda, diplopoda, arachnida,
insecta
, • Which class of arthropod can grow the biggest? -✓✓crustacea
• Crustacea -✓✓Crabs, lobsters
2 body regions, 10 legs, 4 antennae, aquatic
• Chilopoda -✓✓Centipedes
1 pair legs per segment, many segments, 2 antennae, fangs, dorso-ventrally
flattened
• Diplodopa -✓✓millipedes
2 pairs of legs per segment, many segments, 2 antennae, chewing mouthparts
• arachnida -✓✓spiders, scorpions, ticks, mites
no antennae, eight legs, many with 2 body regions, pedipalps
• insecta -✓✓3 body regions, 2 antennae, 0/2/4 wings, 6 legs
• What makes the class insecta unique? -✓✓Wings!
• Does the exoskeleton stretch once it's hard? -✓✓NO.
• Three parts of exoskeleton -✓✓basement membrane, epidermis, cuticle
• Basement membrane -✓✓Non-living layer that protects the epidermis from the
hemolymph.