Assessment2

Classification is putting living organisms into groups with –.

Classification is important, bc—–and—–.

The five groups of living organisms

A species is a group of organisms that can—–.

When members of different species breed, they usually have—–.

Why can’t we be sure how many species there are in the world? (3)

Worldly known two-part scientific name in–: 1.=, 2.=

Members of the same species always look similar. T or F

Plants & animals are—organisms

To help us sort, group, and classify organisms, we use—–.

What is an invertebrate?

70% of animals in the world are—.

60% of invertebrate animals are—.

Five main groups of invertebrates

Four kinds of arthropods

Arthropods all have a — and they have —.

Insects have –segments to their bodies - a —–. They all have – legs and a — on their heads. Many have —.

Arachnids have – segments to their bodies. They have – legs and many of them —. They include spiders, —, and ticks.

Crustaceans have at least – legs. Examples of crustaceans are crabs, —, and shrimps.

Myriapods have —– bodies. They have 1 or 2 —– on each segment.

Echinoderms: These animals have — skins. They are —–shaped and include — and starfish.

Molluscs: Molluscs have — bodies and no —, but they may have —. Molluscs often have a shell —– their body, Some species, such as — and snails, live on land. Others, like squids, octopuses, and many —, live underwater.

Cnidaria: This group of animals all live in —. They include jellyfish, —, and coral. They have no legs, and —– around their mouths.

Worms: These animals have no legs, and long, bodies. They may be —– (with lots of rings or sections to their body). Some types have —–, Examples are flukes, —, and earthworms.