Chapter 13

An increase in ___ in the atmosphere allowed the formation of an ozone layer that protects against UV radiation.

Stanley Miller's experiment demonstrated ___. a. the great age of Earth b. that amino acids can assemble under some conditions c. that oxygen is necessary for life d. all of the above.

The evolution of a new type of ___ resulted in an increase in the amount of oxygen in the atmosphere. a. binary fission c. aerobic respiration b. sexual reproduction d. photosynthesis.

Mitochondria are most likely descendants of ___. a. archaea c. cyanobacteria b. aerobic bacteria d. anaerobic bacteria

Bacteria transfer genes among themselves by ___. a. binary fission c. conjugation b. the lytic pathway d. mitosis

The first eukaryotes were ___. a. bacteria b. protists c. fungi d. animals.

True or false? Some protists are more related to plants than to other protists.

What protist group is most closely related to animals?

The ___ are parasitic eukaryotes that live in other cells. a. viruses b. apicomplexans c. euglenoids d. slime molds e. both a and b f. all are correct.

Remains of ___ form chalk and limestone deposits. a. ciliates b. diatoms c. foraminifera d. dinoflagellates.

Some of the ___ are human pathogens. a. slime molds b. archaea c. flagellated protozoans d. both a and c.

Plants descended from a lineage of ___ algae. a. red b. brown c. green.

Silica-rich remains of ___ are used as an insecticide. a. dinoflagellates b. diatoms c. foraminiferans d. choanoflagellates.

The genetic material of a ___ may be DNA or RNA. a. bacteria b. dinoflagellate c. ciliate d. virus.

Match these terms with the appropriate definition. $$ \text { green algae } \quad \quad\quad\quad\quad \text { a. protist population explosion } $$ $$ \text { virus } \quad \quad\quad\quad\quad \text { b. social amoeba } $$ $$ \text { bacteria } \quad \quad\quad\quad\quad \text { c. most diverse prokaryotes } $$ $$ \text { brown algae } \quad \quad\quad\quad\quad \text { d. noncellular infectious agent } $$ $$ \text { endospore } \quad \quad\quad\quad\quad \text { e. include the largest protists } $$ $$ \text { euglenoid } \quad \quad\quad\quad\quad \text { f. flagellate with chloroplasts } $$ $$ \text { algal bloom } \quad \quad\quad\quad\quad \text { g. closest relative of plants } $$ $$ \text { dinoflagellate } \quad \quad\quad\quad\quad \text { h.layered prokaryotes and sediment } $$ $$ \text { slime mold } \quad \quad\quad\quad\quad \text { i. resistant resting stage } $$ $$ \text { stromatolite } \quad \quad\quad\quad\quad \text { j. whirling cell } $$