holt modern biology chapter 14 vocabulary--history of life
DESCRIPTION
This is a list of the Chapter 14 Vocabulary words for the Holt Modern Biology textbook.TRANSCRIPT
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Chapter 14: History of Life
Holt Modern Biology Vocab
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Biogenesis
all living things come from other living things
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Spontaneous Generation
idea that living things come from nonliving things
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Radiometric Dating
the process of measuring the absolute age of geologic material by measuring the concentrations of radioactive isotopes and their decay products
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Isotopes
atoms of the same element that have different numbers of neutrons
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Mass Number
the sum of the number of neutrons and protons in an atomic nucleus
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Radioactive Decay
the release of particles or radiant energy by the unstable nuclei of some isotopes
(Process)
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Radioactive Isotopes
Atoms that are unstable, meaning they decay, or break down, to form stable atoms of a different element
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Half-life
The length of time it takes for one-half of any size sample of an isotope to decay to a stable form.
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Microspheres
spherical in shape and are composed of many protein molecules that are organized as a membrane
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Coacervates
collection of droplets that are composed of lipids, amino acids, and sugars
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Ribozyme
RNA molecule capable of acting as an enzyme.
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Archaea
Single-celled, no nucleus, Live in harsh condisions, oldest organisms on earth
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Chemosynthesis
process by which some organisms, such as certain bacteria, use chemical energy to produce carbohydrates
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Cyanobacteria
Predominantly photosynthetic prokaryotic organisms containing a blue pigment in addition to chlorophyll
Mmm..Spaghetti!
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Ozone
a form of oxygen that has three oxygen atoms in each molecule instead of two. protects us from dangerous ultraviolet radiation from the sun
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Endosymbiosis
Process through which early prokaryotic cells are thought to have engulfed other, smaller cells and eventually incorporated them as organelles; these cells evolved into modern-day eukaryotes.
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