Pre AP Biology -EVO 2.1 Natural Selection Theory- MCQ Exam Style Questions -New Syllabus
Pre AP Biology -EVO 2.1 Natural Selection Theory- MCQ Exam Style Questions – New Syllabus 2025-2026
Pre AP Biology -EVO 2.1 Natural Selection Theory- MCQ Exam Style Questions – Pre AP Biology – per latest Pre AP Biology Syllabus.
▶️ Answer/Explanation
The correct option is d. seedless vascular plants.
True roots contain vascular tissue ($xylem$ and $phloem$) for transport.
Mosses and liverworts are non-vascular and possess $rhizoids$ instead of true roots.
Seedless vascular plants (like ferns) were the first to evolve these specialized structures.
Conifers evolved much later in the evolutionary timeline than seedless vascular plants.
Therefore, the transition to a dominant $sporophyte$ led to the first appearance of true roots in this group.
▶️ Answer/Explanation
The correct answer is b.
Antheridia are male gametangia that produce sperm in bryophytes and seedless vascular plants.
In seed plants ($gymnosperms$ and $angiosperms$), the male gametophyte is highly reduced.
Seed plants produce pollen grains rather than distinct, multicellular antheridia.
Therefore, antheridia are present in all land plant lineages except for the seed-bearing ones.
This makes statement b the most accurate description of their distribution.
▶️ Answer/Explanation
The correct option is c.
Archegonia are multicellular structures that produce and contain the female gamete (egg).
They are present in bryophytes (nonvascular plants) and pteridophytes (ferns).
In seed plants, they are found in gymnosperms, though they are highly reduced.
Angiosperms (flowering plants) have lost the archegonia entirely during evolution.
In angiosperms, the female gametophyte is the embryo sac, which lacks archegonia.
Therefore, they are found in all land plants except for the angiosperms.