Ten facts about invertebrates

A majority of animals on the planet are

• Invertebrates

• Vertebrates

Which of these is not a group of invertebrates?(choose all that apply)

• Cnidarians

• Mollusks

• Echinoderms

• Animilia

• Plantae

Invertebrates do not have

• A spine most of the creatures are soft and squishy

• A spine some are soft and squishy, but many have other support systems

• A nervous system they lack neurons and a brain

• A ridged back bone, but some of them have a spine

The fossil record shows the earliest invertebrates were jelly fish.

• True

• False

How many species of mollusks are there?

• about 100,000

• about 10,000

• about 75,000

• about 5,000

One major difference between invertebrates and vertebrates

• Invertebrates go through stages of metamorphosis

• Invertebrates are born more or less the same structurally as they are when they are adults.

• Vertebrates are born from eggs exclusively and go through metamorphosis

• Some invertebrates are growing when they emerge from the egg, but revert to a more simple state later in life.

Invertebrate colonies are more commonly found in

• Marine ecosystems

• Terrestrial ecosystems

• Extraterrestrial ecosystems

• Tropical ecosystms

What is a highly evolved and complex invertebrate? (select all that apply)

• Sponges

• Octopuses

• Squids

• Canines

• Jellyfish

Why are most parasites invertebrates?

• They have to be flexible enough to enter into another creatures body.

• Invertebrates are extremely small and squishy

• They must have ridged exoskeletons in order not to be crushed.

• They must live inside other creatures, and vertebrates do not do that.

What is the species name for the fruit fly?

• elegans

• vulgaris

• Caenorhabditis

• fruit fly