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PNB 2250 Exam 1 Practice Questions and Answers

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PNB 2250 Exam 1 Practice Questions and Answers

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©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




PNB 2250 Exam 1 Practice 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


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