29 practice sets · Page 1 of 2
Why are algae considered one of the most important groups of organisms on our planet?
They are rich in vitamin C.
They produce much of Earths oxygen through photosynthesis.
They produce chemicals that are used to treat health problems.
They produce chemicals that are used to make plastics, waxes, and paints.
Which substances allow algae to harvest and use the energy from sunlight?
cilium and fucoxanthin
phycobilin and flagellum
chlorophyll and accessory pigments
oogonium and antheridium
Which statement about Penicillium is correct?
It produces mushrooms.
It is the source of an antibiotic.
It causes bread to rise.
It causes athletes foot.
Which of the following statements about fungi is true?
They bind trace elements and hold them.
They do not affect trace elements.
They return trace elements to the soil.
They deplete the soil of trace elements.
Which of the following is NOT a single organism?
rust
yeast
smut
lichen
Which of the following is algaes most important contribution to humans?
as a source for industrial chemicals
as a photosynthesizer
as a source for medicinal drugs
as a direct food source for humans
What effect did the evolution of different forms of chlorophyll in algae have?
a decrease in the range of depths at which algae can live
no effect on the range of depths at which algae can live
an increase in the range of depths at which algae can live
a reduction in the photosynthetic capacity of algae
What characteristic of plants is shared by green algae?
cell wall composition
multicellularity
photosynthetic pigments
all of the above
The work of funguslike protists and other decomposers is important in improving the quality of
salt water.
topsoil.
fresh water.
potato crops.
The tangled mass that makes up the body of a fungus is the
hypha.
mycelium.
rhizoid.
stolon.
The human disease ringworm is caused by
worms.
a fungus.
bacteria.
yeasts.
The association of plants and fungi in mycorrhizae illustrates a type of relationship called
parasitism.
competition.
mutualism.
parallelism.
Some products derived from algae include
drugs for stomach ulcers and high blood pressure.
chemicals in plastics, waxes, paints, and lubricants.
thickeners for food.
all of the above
Red algae lack flagella and
nuclei.
accessory pigments.
centrioles.
chlorophyll.
Protists that break down organic material include the
funguslike protists.
plantlike protists.
animallike protists.
none of the above
Most fungi reproduce
asexually only.
both sexually and asexually.
sexually only.
by budding.
Many algae switch back and forth between diploid and haploid stages during their life cycle in a process known as
alternation of generations.
sexual reproduction.
fusion of opposite mating types.
asexual reproduction.
In an amoeba, a small cavity within the cytoplasm that stores food is called a
gullet.
food vacuole.
pseudopod.
contractile vacuole.
Funguslike protists get nutrients by
photosynthesis.
absorbing them from dead or decaying matter.
living as an animal parasite.
none of the above
Fungi that absorb food from decaying organic matter are
parasites.
mutualists.
saprobes.
autotrophs.
