Chapter 4, Problem 110 Show all steps (3 Problem a. What structures visible in t

Question

Chapter 4, Problem 110 Show all steps (3 Problem a. What structures visible in the stained preparation were invisible in the unstained preparation? b. Were mitochondria as abundant in human epithelial cells as in onion epidermal cells (procedure 4.6)? Explain. c. What similarities and differences are there between plant and animal cells? d. How do the size and shape of a human epithelial cell differ from those of the Elodea and onion cells that you examined earlier? e. Why do Elodea and onion cells have more consistent shapes than human epithelial cells? Step-by-step solution

Explanation / Answer

a. Nucleus

b. Mitochondria are more abundant in the human epithelial cells in comparision to onion epidermal cells because human cells need a greater amount of energy.

c. Similarities between plant cell and animal cells are that they both are eukaryotic cells. Both plant and animal cells contain membrane bound organelles like nucleus, endoplasmic reticulum, mitochondria.

Plant cells contain chloroplast and cell wall whereas animal cells do not contain cell wall and choroplast. Plant cells perform photosynthesis whereas animal cells do not.

d. Human epithelial cells are spherical whereas Elodea and onion cells are rectangular.

e. Elodea and onion cells have a more consistent shape because they possess a cell wall whereas human cells do not.

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