Which group has the greatest number of animal species?
invertebrates
mammals
vertebrates
Within a kingdom, what is the largest grouping of organisms?
genus
order
phylum
Which two living things are most closely related?
moth and bird
clam and fish
ocelot and tiger
What is the main difference between members of the plant kingdom and members of the animal kingdom?
Plant have stiff tubes; animals have backbones
Plants make their own food; animals eat other living things
Animals have many cells; plants have only one cell
Which statement about vascular plants is not true?
They have tissues that carry water and food.
They are much smaller than nonvascular plants.
They absorb water and nutrients through root hairs.
Which of the following is the MOST important reason that scientists classify living things?
It allows scientists to count groups of organisms quickly.
It helps scientists see how organisms are alike or different.
It shows scientists why organism act the way they do.
How is a fish different from a jellyfish?
A fish has a backbone.
A fish can reproduce.
A fish lives in water.
Trees, wild flowers, and grasses are all considered to be
vascular plants
nonvascular plants
woody plants
Which of the following sea animals would be classified as an invertebrate?
sailfish
shark
squid
A frog is a vertebrate that can also be classified as
an amphibian
a fish
a reptile