Examlex
Concentration differences cause ionic imbalances that polarize the cell membrane, and active transport processes.
Fossil Record
The collection of physical and geological evidence of organisms that lived in the past, preserved in the Earth's crust.
Cretaceous Period
A division of Earth’s history lasting from about 145 to 66 million years ago, marked by the dominance of dinosaurs and the appearance of flowering plants.
Gymnosperms
Seed-producing plants such as conifers that do not have flowers or fruit, with seeds often exposed or on the surface of scales or leaves.
Bryophytes
Non-vascular plants that include mosses, liverworts, and hornworts, characterized by their life cycle stages and lack of vascular tissue.
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