Cell Biology, Genetics, and Evolution: Key Concepts
Hypothesis: statement about observations. Prediction: quantifiable + specific. Characteristics: common chemical composition, cells, convert environment to bio, extract energy, homeostasis, genetic info: develop, maintain, function, reproduce, use genome to produce proteins, evolve. Major events: Formation of cells (prokaryote), Photosynthesis, Aerobic metabolism, Eukaryotic cells, Multicellularity and Specialization. Evidence: Cyanobacteria (prokaryote), Photosynthesis, Colonial, Stromatolites.
Read MoreMonoclonal Antibodies, Plant Defenses, and Culturing Bacteria
Monoclonal Antibodies
Monoclonal antibodies are exact copies of a type of antibody, produced from a single lymphocyte. They are used to target a specific pathogen or hormone. Also known as “magic bullets,” they are artificially produced in labs.
How Monoclonal Antibodies Are Made
- A mouse is injected with the antigen of interest.
- The mouse produces lymphocytes that complement the antigen.
- The mouse is euthanized, and the lymphocytes are collected.
- Lymphocytes do not readily divide by mitosis, so they are
Understanding Ecosystems: Biotope, Biocenosis, and Environmental Factors
Ecosystem: The biosphere formed from a fragment of a live set, the physical environment.
Biotope: The physical space of the ecosystem, the non-living component that supports the ecosystem and its environmental factors.
Environment: The living environment where organisms move within an ecosystem, maintaining constant exchanges of energy.
Aquatic Environment
Formed by water, characteristic of aquatic ecosystems. Water contains dissolved gases and nutrients used by various aquatic organisms for nutrition.
Read MoreChloroplasts, Chromatin, and Photosynthesis: A Deep Dive
Chloroplasts
Chloroplasts are characteristic cell organelles of plants, where photosynthesis occurs. Their shapes and sizes vary.
Structure
Chloroplasts have a double membrane enclosing the stroma. Within the stroma are stacks of discs called thylakoids; a stack is called a granum.
Photosynthetic reactions occur in two phases:
- Light-dependent reactions occur in the thylakoid membrane.
- Light-independent (dark) reactions occur in the stroma.
Membranes
- Inner and Outer Membranes: Both are highly permeable to
Key Concepts in Epistemology, Scientific Methods, and the Origin of Life
Epistemology and Scientific Methods
1. Defining Epistemology
Epistemology is a branch of philosophy that studies scientific knowledge from a historical and methodological perspective.
2. Deductive vs. Inductive Methods
- Deductive: Moving from general principles to specific instances. It often involves a preconceived idea and can be subjective.
- Inductive: Moving from specific observations to general principles. It typically starts without a preliminary idea, aiming for objectivity and relying on experimentation.
Health and Wellness: Physical Activity, Diet, and Risks
Benefits of Physical Activity
If energy intake exceeds energy expenditure in daily activities, weight gain occurs. Diet, weight, and physical activity are interconnected. Physical activity includes any form of exercise or movement. It doesn’t necessarily mean joining a gym or competing in sports. Everyday activities, like biking instead of driving or taking the stairs instead of the elevator, count.
Physical activity benefits the body by:
- Strengthening heart muscles and bones
- Increasing oxygen delivery