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Alien Cross Word Puzzle

Across
a scientific effort to discover intelligent life elsewhere in the universe.
a threadlike structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
resulting from or showing the effect of mutation.
a substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction.
is the range of orbits around a star within which a planetary surface can support liquid water given sufficient atmospheric pressure.
a depression in which water collects, especially one from which animals regularly drink.
The formation of complex organic molecules from simpler inorganic molecules through chemical reactions in the oceans during the early history of the Earth
a solution rich in organic compounds in the primitive oceans of the earth, from which life is hypothesized to have originated.
Down
a calcareous mound built up of layers of lime-secreting cyanobacteria and trapped sediment, found in Precambrian rocks as the earliest known fossils, and still being formed in lagoons in Australasia.
any of a class of nitrogenous organic compounds that consist of large molecules composed of one or more long chains of amino acids.
a simple organic compound containing both a carboxyl and amino.
a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.
the process whereby organisms better adapted to their environment tend to survive and produce more offspring.
The first geological period of the Paleozoic Era, of the Phanerozoic Eon.
self-replicating material present in nearly all living organisms as the main constituent of chromosomes.