Match each organism group on the left with its key structural evolutionary innovation on the right.
- BryophytesNon-vascular body plan with rhizoids for anchorage rather than true roots
- PteridophytesDevelopment of true vascular tissues (xylem and phloem) while still requiring free water for fertilization
- AmphibiansTransition to a three-chambered heart with two atria and a single ventricle for double circulation
- ReptilesEvolution of the cleidoic (amniotic) egg with a protective shell, allowing complete independence from aquatic breeding
Answer
Bryophytes match with non-vascular body plan with rhizoids; Pteridophytes match with true vascular tissues requiring water for fertilization; Amphibians match with three-chambered heart with two atria and one ventricle; Reptiles match with amniotic egg enabling complete independence from aquatic breeding.
Each plant and animal group represents a distinct evolutionary milestone: Bryophytes lack vascular tissue and rely on rhizoids; Pteridophytes represent the emergence of vascular tissue; Amphibians introduced the three-chambered heart in vertebrates; and Reptiles introduced the amniotic egg for terrestrial reproduction.
Step-by-Step Solution
Key Concept
Evolutionary Trends in Plants and Animal Systems
Estimated Time:1m 30s