Search Results for: shapes
Cell morphology
The basic essence for any living organism is its structural framework which includes appearance, form, and the... Read More
Lock-and-key model
Lock-and-key model Definition Lock-and-key model is a model for enzyme-substrate interaction suggesting that the enzyme and... Read More
Induced fit model
Induced-Fit Model Definition The induced-fit model is a model for enzyme-substrate interaction to depict the dynamic... Read More
Gram-negative
Definition adjective Of, or relating to the group of bacteria that take the color of the counterstain (i.e. pink) under the... Read More
Epithelium
An epithelium is a type of animal tissue made up of densely packed cells (called epithelial cells) that rest on a basement... Read More
Nervous tissue
Nervous Tissue Definition Nerve cells (or neurons) and their associated cells, such as neuroglia cells, make up nervous... Read More
Chemical Composition of the Body
In order to fully understand the mechanisms of human physiology, it is important to have an understanding of the chemical... Read More
Plant Tissues
Plants are composed of three major organ groups: roots, stems, and leaves. As we know from other areas of biology, these... Read More
Microalgae
Microalgae Definition Microalgae (singular: microalga) are microscopic algal species as opposed to other algae that are... Read More
Pollen Grain
What are Pollen Grains? Plants are unique structures and so they carry out mechanisms in special ways. Fertilization in... Read More
Biotic factor
Biotic Factor Definition A biotic factor is the living component in an ecosystem. The term "biotic" means "of or related... Read More
Abiotic factor
An abiotic factor is a non-living element of the environment that influences the way organisms and ecosystems function. Some... Read More
Polymorphism
Polymorphism Definition The occurrence of two or more different forms or morphs in the population of a species is referred... Read More
Protein Activity and Cellular Metabolism
Protein Binding Sites The ability of various molecules and ions to bind to specific sites on the protein surface forms the... Read More
Spongioplasm
Definition noun (1) The network or reticulum formed by the fibrils or granules thinly scattered in the cytoplasm. (2) The... Read More
Plant Cells vs. Animal Cells
Plant Cells Most cells are not visible with the naked eye. However, with microscopes of various types, plant cells can be... Read More
Sense of touch
Definition noun Sense recognized by the tactile organs or neural receptors in the skin (as well as in the tongue, throat,... Read More
Fruits, Flowers, and Seeds
Flowering plants grow in a wide variety of habitats and environments. They can go from germination of a seed to a mature... Read More
Differential medium
Differential medium a medium which is used to differentiate different types of microorganisms based on their different... Read More
Proteobacteria
Definition noun (taxonomy) A phylum of the domain Bacteria that includes medically and scientifically important species such... Read More
Behavioural ecology
Definition noun The study of behavioral adaptations and interactions of animals within a population in relation to the... Read More
Xylem parenchyma
Definition noun Parenchyma cells in the xylem tissue and are involved mainly in the storage of carbohydrates, oils, and... Read More
Turbellaria
Definition noun A taxonomic class belonging to the phylum Platyhelminthes (flatworms) characterized by having a body... Read More
Natural selection
Natural Selection Definition What is natural selection in biology? Natural selection is defined as a process in nature... Read More