Which protists are in the same eukaryotic supergroup as land plants?

Which protists are in the same eukaryotic supergroup as land plants? 

A) green algae
B) dinoflagellates
C) red algae
D) brown algae
E) both green algae and red algae




Answer: E

Which group is incorrectly paired with its description?

Which group is incorrectly paired with its description? 

A) rhizarians?morphologically diverse group defined by DNA similarities
B) diatoms?important producers in aquatic communities
C) red algae?acquired plastids by secondary endosymbiosis
D) apicomplexans?parasites with intricate life cycles
E) diplomonads?protists with modified mitochondria






Answer: C

Biologists suspect that endosymbiosis gave rise to mitochondria before plastids partly because

Biologists suspect that endosymbiosis gave rise to mitochondria before plastids partly because 

A) the products of photosynthesis could not be metabolized without mitochondrial enzymes.
B) all eukaryotes have mitochondria (or their remnants), whereas many eukaryotes do not have plastids.
C) mitochondrial DNA is less similar to prokaryotic DNA than is plastid DNA.
D) without mitochondrial CO2 production, photosynthesis could not occur.
E) mitochondrial proteins are synthesized on cytosolic ribosomes, whereas plastids utilize their own ribosomes.




Answer: B

Plastids that are surrounded by more than two membranes are evidence of

Plastids that are surrounded by more than two membranes are evidence of 

A) evolution from mitochondria.
B) fusion of plastids.
C) origin of the plastids from archaea.
D) secondary endosymbiosis.
E) budding of the plastids from the nuclear envelope.






Answer: D