The answer would be D because it leaves you thinking about what will happen next. Hope this helped you out .
The process of gene expression involves two main stages:
Transcription: the production of messenger RNA (mRNA) by the enzyme RNA polymerase, and the processing of the resulting mRNA molecule.
Translation: the use of mRNA to direct protein synthesis, and the subsequent post-translational processing of the protein molecule.
Some genes are responsible for the production of other forms of RNA that play a role in translation, including transfer RNA (tRNA) and ribosomal RNA (rRNA).
Answer:
Exercise boosts energy
Regular physical activity can improve your muscle strength and boost your endurance. Exercise delivers oxygen and nutrients to your tissues and helps your cardiovascular system work more efficiently. And when your heart and lung health improve, you have more energy to tackle daily chores.
Nuclear fusion<span> is the process of combining two lighter nuclei into a single heavy nucleus (part of an atom). This process is also called a nuclear reaction and it releases a large amount of energy. <span>In medium-sized stars such as the Sun, nuclear fusion almost always means the fusing of hydrogen atoms to form helium, but larger stars can produce elements as heavy as iron. </span></span>
Answer:
15. C
16. C
17. B
18. ?
19.B
20.A
21.B
Hope this helps, sorry I didn't know 18.
