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Osmosis is the passive movement of water from an area of high water concentration (dilute solution) to an area of low water concentration (concentrated solution) across a partially permeable membrane down...

Eukaryotes: animals and plantsmany eukaryotes are complex, multicellular organisms cells contain membrane bound organelles (such as a nucleus)
Prokaryotes: bacteria and archaeasingle celled organism...

Variation among genes codes for different phenotypes in a population. Individuals that have a phenotype that is better suited to their environment are more able to survive and reproduce, and therefore, ha...

Metaphase is the third stage of mitosis, following Interphase and Prophase. During interphase, the cell replicates its organelles and centrosomes and synthesis of specific proteins for mitosis occurs. Dur...

Xylem passively and unidirectionally transports water (by osmosis) from the roots to the leaves of a plant, whereas phloem uses active transport to bidirectionally transport food from the leaves to growin...