BIOL 220: Introductory Biology

Unpack the intricate process of photosynthesis, revealing the two major stages within chloroplasts. Discover the vital roles of ATP and NADPH in the Calvin Cycle. Grasp the essence of how plants fuel life on Earth.

Discover how cholesterol, a substance found in our body and certain foods, significantly impacts cell membrane fluidity. Learn its varying effects under different temperatures and in diverse cellular lipid compositions. Uncover its indispensable role in nerve signal transmission and cellular health.

Learn about the unique adaptability of facultatively anaerobic cells in different oxygen conditions. Discover the outcome of an experiment comparing their growth in aerobic and anaerobic environments. Grasp the resilience of these cells and their growth mechanisms.

Learn why lipid-soluble signaling molecules like aldosterone only impact specific target cells. We discuss four theories and reveal that intracellular receptors present only in target cells are the key. This video demystifies the unique mechanism behind aldosterone's selective action.

Discover the intricacies of Allopatric Speciation, where geographical isolation plays a pivotal role. Examine the various factors influencing genetic divergence. Recognize how distinct environments foster unique evolutionary paths.

Unlock the world of pathogens, the microorganisms causing diseases. Grasp how they invade, colonize, and adversely affect host organisms. Learn about prevention strategies to mitigate their harmful impacts.