The functional unit of the nervous system is the neuron.
A chemical substance that accelerates the rate of a chemical reaction without itself undergoing any permanent chemical change is an enzyme.
The breakdown of glucose to release energy in the cell is called glycolysis.
The process of conversion of nitrogen gas into compounds that can be used by plants is nitrogen fixation.
The green pigment in plant cells that is responsible for capturing light energy is chlorophyll.
The process of cell division in which the nucleus divides into two daughter nuclei, each with the same number of chromosomes as the parent nucleus, is mitosis.
The fluid portion of the blood that contains various dissolved substances, including nutrients, hormones, and waste products, is plasma.
The process by which plants lose water vapor through their aerial parts is transpiration.
The process of gamete formation in the reproductive organs of plants and animals is gametogenesis.
The tiny hair-like structures on the surface of cells that move in a coordinated way to create a current are cilia.
The process by which certain plants and some bacteria convert atmospheric nitrogen into organic compounds is nitrogen fixation.
The male reproductive organ of a flower that produces pollen is the stamen.
The smallest unit of an element that retains the properties of that element is an atom.
The fluid-filled sac that surrounds and cushions the developing embryo within the amniotic cavity is the amniotic sac.
The process of blood clotting to prevent excessive bleeding after an injury is coagulation.
The outermost layer of the skin that provides protection and waterproofing is the epidermis.
The central part of the Earth is called the core.
The process of plants using sunlight to synthesize food from carbon dioxide and water is photosynthesis.
The hormone responsible for the development of female secondary sexual characteristics is estrogen.
The organelles in which energy production occurs in eukaryotic cells are mitochondria.
