Which kingdom contains nonphotosynthetic multicellular organisms that digest their food externally?
A. Animalia
B. Archaea
C. Plantae
D. Fungi
E. Protista
Answer: D
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In which environment would a horsetail thrive?
a. shaded marsh b. frozen tundra c. high altitude d. tropical island
Ventilation by a relaxed individual is indicated by
a. A. b. B. c. C. d. D. e. E.
mRNA processing
A) is the degradation of old RNA. b) occurs after transcription. c) occurs at the ribosomes. d) converts introns into primary RNA. e) removes exons from mature RNA.
Can two different species that are members of the same clade have more than one common ancestor? Choose the MOST correct answer and explanation.
A. Yes. Although two species in the same clade have only one most recent common ancestor, they also have a number of older common ancestors that occurred earlier in their evolutionary history. B. Maybe. Two species in the same clade can have more than one common ancestor only in cases where horizontal gene transfer from a third, previously unrelated, species has occurred. C. Yes. Two species of the same clade always have eight common ancestors, matching the number of levels higher than species in the taxonomic hierarchy. D. Maybe. If they are members of a paraphyletic clade, they can have more than one common ancestor. E. No. Because they are members of a clade, by definition they can have only one common ancestor.