Multiple Choice
You are working on tissue samples with a colleague and discover a new kind of virus.Based on the morphological features observed,your colleague says "This is clearly very similar to the common ancestor of all other viruses." You disagree because
A) viruses have probably arisen more than once and do not have a common ancestor.
B) viruses have arisen once and their common ancestor has not be discovered.
C) it is not possible to visualize viruses in the laboratory.
D) DNA studies would be needed to confirm this.
E) viral features are too variable to make such a comparison.
Correct Answer:
Verified
Correct Answer:
Verified
Q1: _ are small intracellular parasites that have
Q3: Most bacteria are<br>A) photoautotrophs.<br>B) photoheterotrophs.<br>C) chemoautotrophs.<br>D) chemoheterotrophs.<br>E)
Q4: The _ are Gram-positive bacteria including those
Q5: Cyanobacteria<br>A) are a diverse and unrelated group
Q7: You analyze bacterial samples from a toxic
Q9: _ can produce heat-resistant endospores.<br>A) Cyanobacteria<br>B) Spirochetes<br>C)
Q11: Which feature is found in both eukaryotes
Q14: Antibiotics such as penicillin have little, if
Q141: The size of the smallest bacterium
Q144: Eukarya are evolutionarily closer to _ than