Multiple Choice
Unlike eutherians, both monotremes and marsupials ________.
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1. Introduction to Biology
Introduction to Taxonomy
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When you look at a pine or maple tree, the plant you see is a __________.
A
spore
B
zygote
C
gametophyte
D
sporophyte
Verified step by step guidance1
Understand the life cycle of plants, specifically the alternation of generations, which includes two main stages: the gametophyte (haploid) and the sporophyte (diploid).
Recall that the sporophyte stage is the dominant stage in vascular plants, such as pine and maple trees. This means the plant you see is in the sporophyte stage.
Recognize that the sporophyte produces spores through meiosis, which will eventually develop into the gametophyte stage.
Differentiate between the terms provided in the question: a spore is a reproductive cell, a zygote is a fertilized egg, and a gametophyte is the haploid stage of the plant life cycle.
Conclude that the visible pine or maple tree is a sporophyte because it represents the diploid, multicellular stage of the plant's life cycle.
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