Search Results for: amoeba
Pseudopodia
A pseudopodium (plural: pseudopodia) refers to the temporary projection of the cytoplasm of a eukaryotic cell. Pseudopodia... Read More
Archamoebae
Definition noun A taxonomic class in Phylum Amoebozoa characterized by the absence of mitochondria Supplement Archamoeba... Read More
Intracellular digestion
Intracellular Digestion Definition What is intracellular digestion? ‘Intra’ means "inside" and ‘cellular’ pertains... Read More
Amoebic dysentery
Definition noun A form of dysentery in which the causative agent is an amoeba, particularly Entamoeba... Read More
Naegleria fowleri
Naegleria fowleri (commonly referred to as the brain-eating amoeba) is a heat-loving amoeboflagellate protozoan of the... Read More
Phagocytosis
Phagocytosis Definition Phagocytosis is a basic physiological cellular process wherein a cell ingests a solid particle... Read More
Unicellular
Unicellular organisms are organisms consisting of one cell only that performs all vital functions including metabolism,... Read More
The Evolution of Cell Organelles
The previous tutorial page noted the emergence of protists, organisms that possessed a distinct cell nucleus and contained... Read More
Asexual reproduction
Asexual Reproduction Definition What is asexual reproduction? Asexual reproduction is a type of reproduction that does not... Read More
Amoeboid movement
Definition noun A crawling-like type of movement in which the cell forms temporary cytoplasmic projections called... Read More
DNA Structure & DNA Replication
Previous pages in this tutorial have described the basics of a cell, the energy required by these cells and how energy is... Read More
Chromosomes X and Y and Sex Determination
Reviewed by: Mary Anne Clark, Ph.D. In humans, the normal chromosome complement is 46, consisting of 22 pairs of... Read More
Non-Mendelian Inheritance
Reviewed by: Mary Anne Clark, Ph.D. The inheritance patterns seen in Mendel's monohybrid and dihybrid crosses... Read More
Biological Cell Defense
Organisms must find a means of defense against antigens such a viruses described on the previous tutorial. If this was not... Read More
Biological Viruses
The prime directive of all organisms is to reproduce and survive and this also applies to viruses. Apparently, viruses are... Read More
Physiological Homeostasis
In animals such as ourselves, the internal environment of our bodies must have certain conditions within tolerable limits to... Read More
Ecosystem Succession
Just one of the amazing aspects of life on Earth is that it spreads to all areas where the habitat will allow it to survive.... Read More
Gene Action – Operon Hypothesis
Reviewed by: Mary Anne Clark, Ph.D. Some genes are switched on or off depending on environmental conditions. The... Read More
Darwin and Natural Selection
Reviewed by: Mary Anne Clark, Ph.D. In the 19th century, a man called Charles Darwin, a biologist from England,... Read More
Protein Variety
The sequence of amino acids determines which type of protein it is. It is synthesized from a DNA strand, each DNA strand... 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
Protein Synthesis
If you have jumped straight to this page, you may wish to look at the previous tutorial about DNA, which gives background... Read More
Biological Cell Introduction
It only takes one biological cell to create an organism. In fact, there are countless species of single-celled organisms,... Read More
ATP & ADP – Biological Energy
ATP stands for adenosine triphosphate, and is the energy used by an organism in its daily operations. It consists of an... Read More
Cell Respiration
As mentioned in the previous tutorial on ATP, the process of respiration is split into 3 distinct areas that occur at... Read More
Photosynthesis – Photolysis and Carbon Fixation
Photosynthesis is the means that primary producers (mostly plants) can obtain energy via light energy. The energy gained... Read More
Principles of Hormonal Control Systems
Hormones are chemical messengers that enter the blood directly upon their secretion from endocrine glands. A single gland or... Read More
Reproduction
Reproduction Definition Reproduction is a biological phenomenon of producing offspring/s. i.e. more of its kind. Depending... Read More
Genetic Information and Protein Synthesis
Genetic Code Genes are sequences of DNA nucleotides that carry and transmit the information specifying amino acid sequences... Read More
Cell theory
What Is Cell Theory? Biological cell theory explains the idea of organismal constitution, structure, and function. It... Read More
