quiz 2 for exam 3 Flashcards
you have discovered a new species aquatic protist that is a primary producer. it cannot swim on its own. it appears to be resistant to physical damage from wave action due to the presence of a glass-like wall. which of the following organisms would this organism be most like?
diatom
a seaweed that grows in shallow, cold water and undergoes heteromorphic alternation of generations is most probably what type of alga
brown
a bacterium that lives in the human intestine derives its nutrition by digesting the contents of the intestine. which mode of nutrition best describes this bacterium
anaerobic chemoheterotroph
which of the following characteristics is common among all protists
eukaryotic
amoebas are polyphyletic. based on this fact, which of the following statements regarding their evolution is correct?
scientists need to continue to investigate the origins and evolutionary history of protists
use of synthetic fertilizers often leads to the contamination of groundwater with nitrates. nitrate pollution is also a suspected cause of anoxic “dead zones” in the ocean. which of the following processes is most likely to help reduce nitrate pollution
adding nitrifying bacteria to the soil
healthy individuals of paramecium bursaria contain photosynthetic algal endosymbionts of the genus chlorella. the chlorella provide their hosts with glucose and oxygen, and p. bursaria provides its chlorella with protection and motility.
which term best describes the symbiotic relationship of well-fed p. bursaria to chlorella
mutualistic
trypanosome infections evade attacks by host immune systems through which of the following mechanisms
production of new cell-surface proteins with a different molecular structure by each new generation
which of the following statements correctly describes both phototrophs and chemotrophs?
chemotrophs obtain energy from chemicals and phototrophs obtain energy from light
which of the following structures provides motility in species of paramecium
many cilia
