uhhhhh I think that its A
At the bottom is the common phospholipid ,phosphatidylcholine.lipids are a group of naturally occurring molecules the include fats ,waxes ,sterols ,fat-soluble vitamins.
<span>Culturing unknown organisms, if this is the same as these answers:
</span>a. human insulin production by bacterial cells
<span>b. hepatities B vaccine production using yeast cells </span>
<span>c. insertion of genes from humans or plants into bacteria or viruses </span>
<span>d. culturing unknown organisms </span>
<span>e. amplification of DNA for microbe identification</span>
Answer:
A nucleus but not a cell wall
Explanation:
The skeleton of an embryo is made up of cartilage and collagen
Hope this helps :3
