Biology 1407 Exam 2 Review Questions and Answers
Question 1.
How much of the CO2 comes from other human activities? What are those?*
Correct Answer: No separate answer was provided in the source PDF.
Question 2.
What is the importance of nitrogen fixation?
Correct Answer: Eukaryotes can use very few forms of nitrogen but some
prokaryotes can convert atmospheric nitrogen to ammonia for use in
metabolism
Question 3.
Disease associated with hadobacteria*
Correct Answer: No separate answer was provided in the source PDF.
Question 4.
Describe 3 subgroups under stramenopiles
Correct Answer: Diatoms and brown algae
Question 5.
Define and give an example predation
Correct Answer: Killing of animals for food Ex: cat and mouse
Question 6.
Explain and give examples of keystone species
Correct Answer: Have strong community-wide effects, not because of their size
or abundance but because of the important role they play in communities Ex:
otters have a huge effect by eating a lot of urchins, controls kelp forests by
eating kelp's main herbivore
Question 7.
Define foraminiferans
Correct Answer: Porous shells called tests Form limestone deposits and are
useful in dating rock strata
Question 8.
Define and give an example of commensalism
Correct Answer: Symbiotic interaction where one participant benefits and the
other is unaffected Ex: bird hole in a tree; vultures and lions
Question 9.
Define and give an example of symbiotic bacteria*
Correct Answer: No separate answer was provided in the source PDF.
Question 10.
Page 1
, Define bacteria
Correct Answer: Have cell walls but lack organelles and nucleus, including some
which can cause disease
Question 11.
Define archaea
Correct Answer: No separate answer was provided in the source PDF.
Question 12.
In a trophic cascade, how will the prevalence of each affect the others?*
Correct Answer: No separate answer was provided in the source PDF.
Question 13.
How to interpret gram stain results
Correct Answer: Gram + : purple Gram - : pink
Question 14.
Describe 3 subgroups under rhizarians
Correct Answer: Radiolarians, forams, cercozoans
Question 15.
Explain the 4 nutritional categories of organisms
Correct Answer: Photoautotrophs (some bacteria, some eukaryotes)
Photoheterotrophs (some bacteria) Chemoautotrophs (some bacteria, many
prokaryotic archaea) Chemoheterotrophs (found in all 3 domains)
Question 16.
Define Batesian mimicry and give an example
Correct Answer: Harmless species looks like a dangerous species Ex:
nonpoisonous butterfly vs monarch butterfly
Question 17.
What are the subgroups under opisthokonts?
Correct Answer: Animals, fungi, and a few protists
Question 18.
Define pseudopodia
Correct Answer: Extensions that bulge from cell body to move organism
Question 19.
Define and give an example of a colony*
Correct Answer: a life-style or habitat where members of the same species live
together ex. ant colony
Question 20.
Define and give an example of transformation*
Page 2
Question 1.
How much of the CO2 comes from other human activities? What are those?*
Correct Answer: No separate answer was provided in the source PDF.
Question 2.
What is the importance of nitrogen fixation?
Correct Answer: Eukaryotes can use very few forms of nitrogen but some
prokaryotes can convert atmospheric nitrogen to ammonia for use in
metabolism
Question 3.
Disease associated with hadobacteria*
Correct Answer: No separate answer was provided in the source PDF.
Question 4.
Describe 3 subgroups under stramenopiles
Correct Answer: Diatoms and brown algae
Question 5.
Define and give an example predation
Correct Answer: Killing of animals for food Ex: cat and mouse
Question 6.
Explain and give examples of keystone species
Correct Answer: Have strong community-wide effects, not because of their size
or abundance but because of the important role they play in communities Ex:
otters have a huge effect by eating a lot of urchins, controls kelp forests by
eating kelp's main herbivore
Question 7.
Define foraminiferans
Correct Answer: Porous shells called tests Form limestone deposits and are
useful in dating rock strata
Question 8.
Define and give an example of commensalism
Correct Answer: Symbiotic interaction where one participant benefits and the
other is unaffected Ex: bird hole in a tree; vultures and lions
Question 9.
Define and give an example of symbiotic bacteria*
Correct Answer: No separate answer was provided in the source PDF.
Question 10.
Page 1
, Define bacteria
Correct Answer: Have cell walls but lack organelles and nucleus, including some
which can cause disease
Question 11.
Define archaea
Correct Answer: No separate answer was provided in the source PDF.
Question 12.
In a trophic cascade, how will the prevalence of each affect the others?*
Correct Answer: No separate answer was provided in the source PDF.
Question 13.
How to interpret gram stain results
Correct Answer: Gram + : purple Gram - : pink
Question 14.
Describe 3 subgroups under rhizarians
Correct Answer: Radiolarians, forams, cercozoans
Question 15.
Explain the 4 nutritional categories of organisms
Correct Answer: Photoautotrophs (some bacteria, some eukaryotes)
Photoheterotrophs (some bacteria) Chemoautotrophs (some bacteria, many
prokaryotic archaea) Chemoheterotrophs (found in all 3 domains)
Question 16.
Define Batesian mimicry and give an example
Correct Answer: Harmless species looks like a dangerous species Ex:
nonpoisonous butterfly vs monarch butterfly
Question 17.
What are the subgroups under opisthokonts?
Correct Answer: Animals, fungi, and a few protists
Question 18.
Define pseudopodia
Correct Answer: Extensions that bulge from cell body to move organism
Question 19.
Define and give an example of a colony*
Correct Answer: a life-style or habitat where members of the same species live
together ex. ant colony
Question 20.
Define and give an example of transformation*
Page 2
