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1.A.1 Natural selection is a major mechanism of evolution. 5.3 The student can evaluate the evidence provided by data sets in relation to a particular scientific question. 1.9 The student is able to evaluate evidence provided by data from many scientific disciplines that support biological evolution.
What a phylogenetic tree is. How to read phylogenetic trees and determine which species are most related. Key points: A phylogenetic tree is a diagram that represents evolutionary relationships among organisms. Phylogenetic trees are hypotheses, not definitive facts.
Cell signaling pathways begin when the ligand binds to a receptor, a protein that is embedded in the plasma membrane of the target cell or found in the cell cytoplasm. The receptors are very specific, and each ligand is recognized by a different one. This stage of the pathway is called reception. Molecules that are nonpolar, such as steroids ...
Through regulation of these enzymes, a muscle cell rapidly gets a large, ready pool of glucose molecules. The glucose is available for use by the muscle cell in response to a sudden surge of adrenaline—the “fight or flight” response.
Everyday Connection for AP® Courses. Until recently, these three species of short-tailed pythons, Python curtus, Python brongersmai (middle), and Python breitensteini were considered one species. However, due to the different locations in which they are found, they have become three distinct species. Figure 18.12.
Community questions. Learn AP Biology using videos, articles, and AP-aligned multiple choice question practice. Review the fundamentals of biochemistry, cell biology, genetics, evolution, and ecology, and develop scientific thinking skills as you explore the study of life.
The syllabus of describes Evidence how visual representations are utilized in biology instruction. For example: Students complete the activity “Great Clade Race.”. Students are given cards with various symbols and create a “race through the woods” to show how the “runners” take paths and end up at the finish line.
