CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
CAMPBELL BIOLOGY IN FOCUS (LL)-W/MOD.MA
3rd Edition
ISBN: 9780135686065
Author: Urry
Publisher: PEARSON
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Chapter 30.1, Problem 2CC

WHAT IF? In some species, sepals look like petals, and both are collectively called “tepals.” Suggest a possible extension to the ABC hypothesis that could account for the origin of tepals.

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In some species, such as magnolia, sepals look like petals, and both are collectively called "tepals:' Suggest an extension to the ABC model that could hypothetically account for the origin of tepals.
Give answer.
. WHAT IF? If flowers had shorter styles, pollen tubeswould more easily reach the embryo sac. Suggest anexplanation for why very long styles have evolved inmost flowering plants.
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General Embryology Review in 20 minutes; Author: Medical Animations;https://www.youtube.com/watch?v=4YKvVeVMmEE;License: Standard youtube license