Fungi are important to humans as (select all that apply):

a. a source of citric acid.

b. photosynthesizing organisms.

c. the source of some antibiotics.

d. decomposers of dead organic material.

e. producers of oxygen.

Fungi reproduce through cells called spores that (select all that apply):

a. have a single set of chromosomes.

b. often are released from structures called fruiting bodies.

c. usually are released in huge numbers.

d. must fuse with another spore to bring about germination.

e. germinate without fusing with another cell.

Fungi that obtain their nutrition from living organisms are referred to as _______, while fungi that obtain their nutrition from dead organic material are referred to as________.

a. carnivores; herbivores

b. saprophytes; parasites

c. omnivores; herbivores

d. parasites; saprophytes

e. saprophytes; herbivores

The association between fungi and algae (or bacteria) in forming lichens is one of _______in that _______.

a. parasitism; only one party benefits from the relationship

b. competition; neither party benefits from the relationship

c. competition; both parties are vying for the same resources

d. mutualism; both parties are benefiting from the relationship

e. saprophytism; one party is feeding on the dead remains of the other

The mycorrhizae formed by the association between fungal _____ and plant _____ are found in ______ seed plants.

a. hyphae; roots; only a few

b. spores; leaves; only a few

c. hyphae; roots; the vast majority of

d. fruiting bodies; roots; the vast majority of

e. hyphae; stems; only a few

In contrast to bacteria and archaea, all protist cells have a _______, which makes protists eukaryotes. While some protists are large, most are _______; all of them live in environments that are at least moist if not fully _______.

The organisms known as phytoplankton are important to life in general for two reasons: They produce most of the world’s atmospheric _____ and they lie at the base of most aquatic _____.

The catchall term for protists that perform photosynthesis is _______.

The relationship between human beings and bacteria that are resident in the human digestive tract can be characterized as one of _______, which is to say a relationship in which both parties benefit.

Antibiotics are chemical compounds produced by one microorganism that are to another.

Name three ways that bacteria and archaea are similar life-forms.