The heart is one of the first parts of the embryo to develop. what part of the stem cell provides instructions for building a heart? 1) rer 2) dna 3) lysosmes 4) ribosomes

If a set of instructions that determines all of the charactersitics of an organism is comparedto a book,and a chromosme is compared to chaper in the book,then what might be compared to a paragraph in the book?

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

What is the following best defines climate?