Multiple Choice
According to fossil records, how many new species of snails with planktonic larvae are estimated to have arisen between 50 and 35 million years ago?
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21. Evolution
Introduction to Evolution and Natural Selection
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The most recent common ancestor shared only by gymnosperms and angiosperms is represented by which of the following groups?
A
Flowering plants (Angiosperms)
B
Seed plants (Spermatophyta)
C
Vascular plants (Tracheophyta)
D
Non-vascular plants (Bryophytes)
Verified step by step guidance1
Understand the evolutionary relationship between gymnosperms and angiosperms. Both are seed-producing plants, which places them in the group called Spermatophyta.
Recognize that gymnosperms and angiosperms are distinct from non-seed-producing plants like vascular plants (Tracheophyta) and non-vascular plants (Bryophytes). These groups represent earlier evolutionary stages.
Recall that angiosperms are flowering plants, while gymnosperms are non-flowering seed plants. Despite their differences, they share a common ancestor within the seed plant group.
Eliminate incorrect options by considering the evolutionary timeline: Non-vascular plants (Bryophytes) and vascular plants (Tracheophyta) evolved before the emergence of seed plants.
Conclude that the most recent common ancestor shared only by gymnosperms and angiosperms is represented by the group Seed plants (Spermatophyta).
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