Which statement is true about brca1 and brca2 genes?

a. these genes were discovered in 1953.

b. cancerous tumors often form on these genes.

c. people can be tested for mutations on these genes.

d. mutations of these genes lead to diabetes.

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Describe characteristics of a good respitory surface