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PNB 2250 Exam 1 Questions And Answers

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PNB 2250 Exam 1 Questions And Answers Plant specific cell to cell connections ANS plasmodesma animal specific cell to cell connections ANS tight junctions What systems are able to exist because of multicellularity? ANS Control systems and distribution What organisms have the highest number of genes? ANS Plants Why is the fossil record incomplete? ANS loss of soft tissue and DNA What is the extant ancestor to animals? ANS Choanoflagellate

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PNB 2250 Exam 1 Questions And Answers
Plant specific cell to cell connections ANS plasmodesma



animal specific cell to cell connections ANS tight junctions



What systems are able to exist because of multicellularity? ANS Control systems and distribution



What organisms have the highest number of genes? ANS Plants



Why is the fossil record incomplete? ANS loss of soft tissue and DNA



What is the extant ancestor to animals? ANS Choanoflagellate



What traits do choanoflagellates have that are similar to animals? ANS animal specific genes,
cell adhesion, and signal pathways



analogous structures ANS similarities among unrelated species that result from convergent
evolution


Entropy ANS 2nd Law of Thermodynamics; system stability requires energy input



what is the single most important physical factor? ANS entropy



Characteristics of CHONPS ANS two or fewer electron shells, strong intramolecular bonds,
double and triple bonds, maintenance of structure



ATP ANS universal form of energy

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