Animal cells have neither cell walls nor chloro-plasts, whereas plant cells have both. Fungal cells aresomewhere in between; they have cell walls but lack chlo-roplasts. Are fungal cells more likely to be animal cells thatgained the ability to make cell walls, or plant cells that losttheir chloroplasts? This question represented a difficultissue for early investigators who sought to assign evolu-tionary relationships based solely on cell characteristicsand morphology. How do you suppose that this questionwas eventually decided?
Animal cells have neither cell walls nor chloro-plasts, whereas plant cells have both. Fungal cells aresomewhere in between; they have cell walls but lack chlo-roplasts. Are fungal cells more likely to be animal cells thatgained the ability to make cell walls, or plant cells that losttheir chloroplasts? This question represented a difficultissue for early investigators who sought to assign evolu-tionary relationships based solely on cell characteristicsand morphology. How do you suppose that this questionwas eventually decided?
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Animal cells have neither cell walls nor chloro-
plasts, whereas plant cells have both. Fungal cells are
somewhere in between; they have cell walls but lack chlo-
roplasts. Are fungal cells more likely to be animal cells that
gained the ability to make cell walls, or plant cells that lost
their chloroplasts? This question represented a difficult
issue for early investigators who sought to assign evolu-
tionary relationships based solely on cell characteristics
and morphology. How do you suppose that this question
was eventually decided?
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