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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 RESERVEDFIRST 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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