The first forms of life on Earth were thought to be_______.
- single-celled plants
- large animals such as dinosaurs
The first organisms that oxygenated the atmosphere were _______.
- phototrophic organisms
- anaerobic organisms
- all of the above
Which of the following consist of prokaryotic cells?
- bacteria and fungi
- archaea and fungi
- protists and animals
- bacteria and archaea
Prokaryotes stain as Gram-positive or Gram-negative because of differences in the _______.
- cell wall
Prokaryotes that obtain their energy from chemical compounds are called _____.
Bioremediation includes _____.
- the use of prokaryotes that can fix nitrogen
- the use of prokaryotes to clean up pollutants
- the use of prokaryotes as natural fertilizers
- All of the above
What event is thought to have contributed to the evolution of eukaryotes?
- global warming
- volcanic activity
- oxygenation of the atmosphere
Mitochondria most likely evolved from _____________.
- a photosynthetic cyanobacterium
- cytoskeletal elements
- aerobic bacteria
- membrane proliferation
Protists with the capabilities to absorb nutrients from dead organisms are called_____________.
Which parasitic protist evades the host immune system by altering its surface proteins with each generation?
- Paramecium caudatum
- Trypanosoma brucei
- Plasmodium falciparum
- Phytophthora infestans
Which polysaccharide is usually found in the cell walls of fungi?
What term describes the close association of a fungus with the root of a tree?
- a rhizoid
- a lichen
- a mycorrhiza
- an endophyte