61 results found

Search Results for: shapes

Bone

The bone is an organ that forms the skeleton of vertebrates. It is formed from bone tissues, which are mineralized... Read More

Capsid

Capsid Definition A capsid is a three-dimensional proteinaceous capsular shell around a virus that encloses the viral... Read More

Bacteria

Bacteria Definition What are bacteria? What is the definition of bacteria in biology? Bacteria are defined as organisms... Read More

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

Dendrite

Dendrite Definition Dendrites are the protoplasmic projections from the neuron cells that receive the electrochemical... 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

Stipulate

Stipulate Definition Stipulate meaning: Stipulate typically refers to a specific feature or characteristic of a plant's... 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

Labia

Labia Definition Often, when persons think of the female reproductive system, they think of the vagina. However, the female... 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

Anticodon

The anticodon is a special code on tRNA that matches up with the instructions on the mRNA thus making sure that the... Read More

Diatom

Diatom Definition A diatom is a unicellular eukaryotic alga characterized by having a siliceous covering and a symmetrical... 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

Canthus

Canthus Definition The canthus refers to the corner or angle of the eye formed by the joining of the lower and upper... 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

Sclereid

Definition noun, plural: sclereids A type of sclerenchyma cell of varying shapes but are typically shorter than sclerenchyma... Read More

Taxonomy

Taxonomy Definition The term "taxonomy" was developed from two Greek words, "taxis," meaning arrangement, and "nomia,"... Read More

Microbe

Microbe Definition What is a microbe? How do we define microbes?  Microbes refer to microorganisms that cannot be seen by... Read More

Leukocyte

Leukocytes, also called the white blood cells (WBCs), inhabiting our immune system are the cells that exhibit astonishing... 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

Traits

Traits Definition "Trait" is a rather well-known word in the English language. What does trait mean? A trait is defined... Read More

Leaflets

The word "leaflet" is defined as one of the individual leaf-like structures comprising a compound leaf. A quick look at a... Read More

Shell

shell 1. A hard outside covering, as of a fruit or an animal. Specifically: The covering, or outside part, of a nut; as, a... Read More