The diagram below shows a portion of DNA. The nucleobases adenine, thymine, cytosine, and guanine are matched together in
base pairs, and the order of these base pairs makes a genetic code.
Adenina
O
-Thymine
Cytosine
Guanine
Which describes the genetic code in a human?
Different genetic codes appear in each different type of cell.
Every human has the same exact genetic code.
Genetic codes change frequently in reaction to external factors.
A genetic code determines the physical traits of the body.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above

oxygen is the first element in group 16 (via) of the periodic table. the periodic table is a chart that shows how chemical elements are related to each other. the elements in group 16 are said to belong to the chalcogen family. other elements in this group include  sulfur, selenium, tellurium,  and  polonium.  the name chalcogen comes from the greek word  chalkos,  meaning "ore." the first two members of the family, oxygen and sulfur, are found in most ores.

oxygen is by far the most abundant element in the earth's crust. nearly half of all the atoms in the earth are oxygen atoms. oxygen also makes up about one-fifth of the earth's atmosphere. nearly 90 percent of the weight of the oceans is due to oxygen. in addition, oxygen is thought to be the third most abundant element in the universe and in the solar system.

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