Why did the narrator use the phrase “fit together like puzzle pieces” to describe how the cells of a developing human embryo form a human face
A nerve cell is a cell that travels in a nerve bacilcly it is neuron and it transmits signals to the brain to do something so if we want the wave our hand the nerve cell/neuron transmits signals to the brain.
Answer:
Three of the four nitrogenous bases that make up RNA — adenine (A), cytosine (C), and guanine (G) — are also found in DNA. In RNA, however, a base called uracil (U) replaces thymine (T) as the complementary nucleotide to adenine
Explanation: