Invertebrates classified
Most of these have a body made of a jellylike substance.
Cnidarian
Spiders, centipedes, millipedes, mites, ticks, lobsters, crabs, shrimp, crayfish, barnacles, and insects are all members of the same phylum
Arthropoda
Ocelli
Symmetry where the body parts of some animals are arranged in a circle around a center point
radial symmetry
An annelid
shedding of the exoskeleton
What is to molt
Helps invertebrates find food, choose a mate, and escape predators
olfaction
Symmetry in which their body parts are arranged in the same way on their left and right sides.
Bilateral symmetry
parasitic flatworms that live inside a host
what is flukes
Located on the abdomen of insects, these pores open into tubes called trachea
spiracles
TRUE or FALSE - Farmers and foresters sometimes use pheromones to control pests that damage forests or destroy food crops.
TRUE
It allows the animal to grab food from all directions.
Daily Double
The process of growing new body parts
regeneration
What does having an open circulatory system mean?
DAILY DOUBLE
Give two examples of animals that lack any symmetry and what is this called?
Asymmetry ; example: sponges, fiddler crab, hermit crabs, snails, etc.
Why are Cnidarians so important in their ecosystems?
The many species of sea anemones, sea jellies, and corals add to the diversity of the ocean environment and help maintain its health.
Cnidarians are an important part of the ocean food chain, acting as predators as well as prey.
Give an example of two helpful arthropods and how they benefit humans
• Bees, ants, beetles, and butterflies pollinate flowering and fruit-bearing plants. The fresh fruit section in grocery stores would be empty if it were not for insect pollinators.
• Spiders eat mosquitoes, flies, and many other harmful insects.
• Burrowing insects create channels in soil that allow water to reach plant roots.
• The praying mantis eats caterpillars and aphids, two insects that can do significant damage to plants.
• Insect droppings also help fertilize soil
Discuss two ways in which invertebrates communicate.
Many insects use olfaction to communicate. They do this with pheromones.
The chemical senses of invertebrates are taste and smell, which we collectively call olfaction. Olfaction helps invertebrates find food, choose a mate, and escape predators.
Some invertebrates can communicate with sound, such as crickets. Male fruit flies vibrate their wings to make sounds. One kind of sound vibration attracts females. Another warns male competitors away.