Answer:
O H20 and CH4, but not O2
Explanation:
Compounds consist of multiple elements. O2 is just two oxygen atoms, meaning two atoms from the same element.
B) 60° north latitude and 0° longitude
<span> A </span>test cross<span>, involves the breeding of an individual with a phenotypically recessive individual.
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d. The mutation will be expressed only if the individual has two copies of the recessive allele.