<span>Therefore, transcription is the first step of gene expression, in which a particular segment of DNA is copied into RNA (mRNA) by the enzyme RNA polymerase. Both RNA and DNA are nucleic acids, which use base pairs of nucleotides as a complementary language. however the two can be converted back and forth from DNA to RNA by the action of the correct enzymes.
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<span>Since the Industrial Revolution, human sources ofcarbon dioxide emissions have been growing. Humanactivities such as the burning of oil, coal and gas, as well as deforestation are the primary cause of theincreased carbon dioxide concentrations in theatmosphere.</span>
Answer: D
Explanation: They can be sure if they both take a blood test. There is a possibility both jane and john are carriers of sickle cell(AS), which makes it possible to have children with sickle cell disease. Also, both jane and john may not be carriers at all (AA), in that case none of their child will have sickle cell, likewise if either of them is AA, and the other is a carrier, none of their child will have sickle cell.
Answer:
C) semipermeable
Explanation:
because permeable means it allows things through, and then semi makes it to where it only allows certain things through
and Impermeable means it won't let things through and the other two options just don't make sense for the question
