Comparative Cell Biology — What fundamental cellular features do an elephant (animal cell) and an oak tree (plant cell) share?
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AThey both are eukaryotes.
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BThey both have a cell nucleus.
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CThey both have mitochondria.
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DAll of the above
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EThey both lack membrane-bound organelles.
Answer
Correct Answer: All of the above
Explanation
Introduction:The goal is to identify common eukaryotic traits shared by animal and plant cells. Despite obvious differences (cell wall, chloroplasts, vacuoles), both lineages retain hallmark eukaryotic features.
Given Data / Assumptions:
- Elephant cells are animal eukaryotic cells.
- Oak tree cells are plant eukaryotic cells.
- Eukaryotes have a nucleus and membrane-bound organelles.
- Both animals and plants possess mitochondria for aerobic respiration.
Concept / Approach:Check each statement for general eukaryotic validity. If all are true, the inclusive option becomes correct.
Step-by-Step Solution:
1) Eukaryote status: both animals and plants are eukaryotes; true.2) Nucleus: both possess a nucleus containing linear chromosomes; true.3) Mitochondria: universal among known aerobic eukaryotes; true.4) Therefore the combined choice 'All of the above' is correct.Verification / Alternative check:Plant cells contain mitochondria in addition to chloroplasts; chloroplast presence does not negate mitochondrial presence.
Why Other Options Are Wrong:
a) True but incomplete.b) True but not exhaustive.c) True but singular.e) False: eukaryotes characteristically have many membrane-bound organelles.Common Pitfalls:Assuming plants use only chloroplasts for energy and lack mitochondria; forgetting that 'eukaryote' already implies a nucleus.
Final Answer:All of the above.