Assessment2 Flashcards
Classification is putting living organisms into groups with –.
similar characteristics
Classification is important, bc—–and—–.
it lets us know how many different types of living organisms there are;
lets scientists around the world know which organisms they are discussing
The five groups of living organisms
bacteria, fungi, plants, animals, protists
A species is a group of organisms that can—–.
reproduce to produce fertile offspring.
When members of different species breed, they usually have—–.
infertile offspring called hybrids.
Why can’t we be sure how many species there are in the world? (3)
- Small or rare
- Live in unexplored places such as the deep ocean
- Live in areas with many other species, such as rainforests
Worldly known two-part scientific name in–: 1.=, 2.=
Latin; Similar species; Each species
Members of the same species always look similar. T or F
F
Plants & animals are—organisms
multicellular
To help us sort, group, and classify organisms, we use—–.
observation and secondary sources of information
What is an invertebrate?
Animals without backbones.
70% of animals in the world are—.
invertebrates/ without backbone
60% of invertebrate animals are—.
arthropods
Five main groups of invertebrates
arthropods, echinoderms, molluscs, cnidaria, worms
Four kinds of arthropods
Insects
Arachnids
Crustaceans
Myriapods
Arthropods all have a — and they have —.
hard outer skeleton; jointed legs
Insects have –segments to their
bodies - a —–. They all have – legs
and a — on their heads. Many have —.
3; head, thorax, and, abdomen; 6; pair of antennae; wings
Arachnids have – segments to their
bodies. They have – legs
and many of them —.
They include spiders, —, and ticks.
two; 8; spin webs; scorpions
Crustaceans have at least – legs. Examples of crustaceans are crabs, —, and shrimps.
10; prawns
Myriapods have —– bodies. They have 1 or 2 —– on each segment.
long segmented; pairs of legs
Echinoderms:
These animals have — skins. They are —–shaped and include — and starfish.
spiny; star- or ball-; sea urchins
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.
muscular; legs; tentacles; inside or outside; slugs; shellfish
Cnidaria:
This group of animals all live in —. They include jellyfish, —, and coral. They have no legs, and —– around their mouths.
the sea; sea anemones; stinging tentacles
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.
flat, round or segmented; hooks and suckers; tapeworms
