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Mitochondrion
In cell biology, a mitochondrion (plural mitochondria) is an organelle found in most eukaryotic cells. Mitochondria are sometimes described as "cellular power plants," because their primary function ... > more -
Microorganism
A microorganism or microbe is an organism that is so small that it is microscopic (invisible to the naked eye). Microorganisms are often illustrated using single-celled, or unicellular organisms; ... > more -
Spermatozoon
A spermatozoon or spermatozoan (pl. spermatozoa), and more commonly known as a sperm cell, is the haploid cell that is the male gamete. It joins an ovum to form a zygote. A zygote can grow into a new ... > more -
Developmental Biology
Human Biology
Diseases and Conditions
Healthy Aging
Sports Medicine
Attention Deficit Disorder
Parasympathetic nervous system
The parasympathetic nervous system is one of three divisions of the autonomic nervous system. Sometimes called the rest and digest system, the parasympathetic system conserves energy as it slows the ... > more -
Flowering plant
The flowering plants (also called angiosperms) are the dominant and most familiar group of land plants. The flowering plants and the gymnosperms comprise the two groups in the seed plants. The ... > more -
Plant breeding
Plant breeding is the purposeful manipulation of plant species in order to create desired genotypes and phenotypes for specific purposes. This manipulation involves either controlled pollination, ... > more -
Prokaryote
Prokaryotes are organisms without a cell nucleus, or indeed any other membrane-bound organelles, in most cases unicellular (in rare cases, multicellular). This set of characteristics is distinct from ... > more -
Cell (biology)
The cell is the structural and functional unit of all living organisms, and is sometimes called the "building block of life." Some organisms, such as bacteria, are unicellular, consisting of a single ... > more -
Molecular biology
Molecular biology is the study of biology at a molecular level. The field overlaps with other areas of biology and chemistry, particularly genetics and biochemistry. Molecular biology chiefly ... > more
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