Viruses, bacteria, protists, and fungi

Which of the following is true of all protists?

• They are all unicellular.

• They are all capable of photosynthesis.

• They are all eukaryotes.

• They are all primitive plants or animals.

Raj is using a microscope to examine protists in a drop of water. The organisms appear to move through the water using a single long structure that waves back and forth. What is this structure?

• cilium

• pilus

• pseudopod

• flagellum

Mycorrhizae are symbiotic associations between fungi and organisms of which group?

• protists

• algae

• plants

• archaea

Which is NOT a source of emerging diseases?

• rapidly evolving viruses

• pathogens developing antibiotic resistance

• vaccines against polio, diphtheria, and tetanus

• viruses "jumping" from animals to humans

Particles made up of proteins, nucleic acids, and sometimes lipids that can reproduce only by infecting living cells are called

• bacteria

• capsids

• prophages

• viruses

One group of viruses that contain RNA as their genetic material are called

• bacteriophages

• retroviruses

• capsids

• prophages

Prokaryotes are unlike any other organisms in that their cells

• Lack nulcei

• have organelles

• have cell walls

• lack nucleic acids

Prokaryotes reproduce asexually by

• binary fission

• endospores

• conjugation

• mutation

Which of the following statements about fungi is false

• all fungi are unicellular

• all fungi have cell walls

• all fungi are eukaryotic

• all fungi are heterotrophs

A symbiotic relationship between a fungus and a green alga or cyanobacterium is

• mycorrhiza

• fruiting body

• lichen

• mushroom