Cell theory is a scientific theory with three claims:
- all living organisms are made up of one or more cells
- cells are the smallest unit of structure in organisms
- cells are made from other cells

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Cell

Any living thing that functions as a singular entity

Organism 

- Genetics
- Cell theory
- Evolution
- Homeostasis

Foundations of Modern Biology

Wikipedia

Tissue

The molecular structures and processes of cellular life and their roles in the function, reproduction, and development of living organisms.

- The Central Dogma of Life
- Cell Organelles

Molecular and Cellular Biology

The (metabolic) center of a neuron. It is in charge of keeping the cell alive

Cell body

Animal cell organelles are specialized entities in a cell that performs a particular function. 

- Nucleus
- Endoplasmic Reticulum
- Golgi Apparatus
- Ribosome
- Mitochondria
- Lysosome
- Peroxisome 
- Cell membrane

Animal Cell Organelles

Cell Theory

Types of Cells

Cell-cell interactions describe the process in which one cell influences the differentiation of neighboring cells during the development of the nervous system. This process is a key reason why vertebrate brains are less hardwired and more susceptible to environmental cues and experience. In contrast, invertebrate development, such as in C. elegans, is more hardwired and relies less on cell-cell interactions, making their mitotic lineages strictly predictable and easier to trace.

Cell-Cell Interactions

An ecosystem describes the interactions between groups of organisms from all biological domains and nonliving things in a shared geographical space.

Ecosystem

Symbiosis is any close relationship shared by two biological organisms of different species (called symbionts).

Symbiosis (long term interspecific interactions)

The process in which physical/behavioral changes of a population occur over long periods of time. Evolution is a scientific theory that for over the last 150 years, scientists have gathered an overwhelming amount of evidence that supports this theory.  

Evolution 

The scientific field of study of traits and their passage from parents to offspring. Humans inherit 23 chromosomes from the father, and 23 from the mother. These 23 pairs of chromosomes consist of 22 autosomal chromosome pairs and one sex chromosome pair. The physical unit of inheritance is a gene, comprised of DNA (Deoxyribonucleic acid) segments.

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