C. The number of covalent bonds is equal to the number of unpaired valence electrons. For example, nitrogen and phosphorous both have 3 unpaired valence electrons thus forming 3 covalent bonds.
Microscope to focus on a specimen identify one safety issue to consider
<span>a)Stem cells must always be provided by a donor who is financially compensated.</span>
The nucleolus is the central support structure
Answer:
yea it should be B
Explanation:
because the problems and or deformity in the blood cell prevents blood from carrying oxygen properly