Human Heredity and History of life / Biology

Radiometric dating

________: uses the decay of radioactive isotopes to measure the age of a rock.

Cystic fibrosis

________: is a genetic disorder that affects mucus and sweat secretions.

Paleontologist

________: is a scientist who studies fossils.

Cambrian explosion

________: rapid diversification of most major animal groups marking the start the paleozoic era.

Pedigrees

________: are used to study human inheritance patterns.

Achondroplasia

________: sometimes is called dwarfism.

K T

________ boundary: layer of iridium rich material between the rocks of the cretaceous period and rocks of the paleogene period that provides evidence of a meteorite impact.

Huntingtons disease

________: affect the nervous system.

Relative dating

________: is a method used to determine the age of rocks by comparing them with those in other layers.

Genetic disorders

________: can be caused by dominant or recessive alleles.

Plate tectonics

________: describes the movement of several large plates that make up the surface on Earth.

Half life

________: is the amount of time it takes for half of the original isotope to decay.

origin of life

The ________ is hypothesized to be a series of chemical events.

geologic time scale

The ________ is divided into eras, periods and epochs.

Organic molecules

________, such as amino acids, might have been formed from simpler molecules on early Earth.

Epochs

________: which las several million years, re the smallest units of geologic time.

Relative dating

________ and radiometric fating are two methods used to determine the age of fossils.

Endosymbiont theory

________: explains that eukaryotic cells may have evolved from prokaryotic cells.

Geologic time scale

________: is a record of earths history.

carrier

describes a person who is heterozygous for a recessive disorder

law of superposition

states that younger layers of rocks are deposited on top of older layers

epochs

which las several million years, re the smallest units of geologic time

periods

last ten millions of years, are division of geologic time consisting of two or more epochs

era

lasts hundreds of millions of years, is a unit of geologic time consisting of 2 or more periods

eon

is the longest unit of time in the geologic time scale and can include billions of years

plate tectonics

describes the movement of several large plates that make up the surface on Earth

spontaneous generation

is the idea that life arises from nonlife

theory of biogenesis

states that only living organisms can produce other living organisms