🧪 Unit 1: Chemistry of Life
1.3Introduction to Biological Macromolecules
1.4Properties of Biological Macromolecules
1.5Structure and Function of Biological Macromolecules
🧬 Unit 2: Cell Structure and Function
2.1Cell Structure: Subcellular Components
🔋 Unit 3: Cellular Energetics
🦠 Unit 4: Cell Communication and Cell Cycle
4.0Unit 4 Overview: Cell Communication and Cell Cycle
4.2Introduction to Signal Transduction
👪 Unit 5: Heredity
👻 Unit 6: Gene Expression and Regulation
🦍 Unit 7: Natural Selection
🌲 Unit 8: Ecology
8.4Effect of Density of Populations
👏 General Review
✍️ Free Response Questions (FRQ)
Biology Long Essay Free Response Questions
Biology Short Essay Free Response Questions
🧐 Multiple Choice Questions (MCQ)
Biology Multiple Choice Questions
May 30, 2020
Fitness refers to the fact that organisms have varying abilities to survive and reproduce. Individuals with beneficial traits, called adaptations, are more capable of survival and reproduction in their environment.
These variations occur at the microscopic level of DNA and proteins. Differences in DNA allow organisms to produce different proteins. These proteins can then respond differently to stimuli in their environment.
In the context of this unit, some organisms are better than others at harnessing energy. Perhaps an organism has a better ability to hunt and consume energy. Maybe one organism is capable of going through aerobic respiration, while another is stuck in anaerobic respiration. Any of these differences will create selective pressure that allows some organisms to survive and reproduce more than others.
If an organism is more capable of survival and reproduction, then they are passing their DNA down more frequently than those with less desirable traits. This makes the next generation resemble the adaptations of the organism that is more capable of survival and reproduction. In these situations, environmental pressures can truly change the genetic makeup of a population over time.
Image courtesy of Pixabay.
Watch AP Bio live streams here.
2550 north lake drive
milwaukee, wi 53211
92% of Fiveable students earned a 3 or higher on their 2020 AP Exams.
*ap® and advanced placement® are registered trademarks of the college board, which was not involved in the production of, and does not endorse, this product.
© fiveable 2020 | all rights reserved.