Hypontonic <span>environment
</span>
Answer:
1. C.) Their cell walls contain chitin
2. C.) Chloroplast
A single molecule is the one that is responsible for initiating a signal transduction pathway. The answer in this question is a single molecule. Molecule is defined as an electrically neutral group of two atoms or more held together by a chemical bonds.
Eukaryotic cells have the ability to absorb other cells by phagocytosis.
<span>Characterized by the presence of the nucleus, formed by a rope DNA (the free ends) surrounded by two layers reticulum (nuclear envelope). Eukaryotic DNA forms a complex with a large number of proteins</span>
<span>dirty, contaminated, </span><span>polluted, unclean, </span><span>unsanitary, <span>unsterile.</span></span>
