All mammalian teeth share a similar structure: 1) the enamel crown, formed by epithelial cells; 2) the dentin found underlying the enamel, formed by mesenchymal cells and containing a large collagen component; 3) the pulp, the organ generating/supplying the dentin-forming cells (odontoblasts), and also containing ..
Hi there! I can tell you exactly what they do and what they’re for. I learned it myself in biology class.
The DNA polymerases are enzymes that create DNA molecules by assembling nucleotides, the building blocks of DNA. These enzymes are essential to DNA replication and usually work in pairs to create two identical DNA strands from one original DNA molecule.
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<span>A scanning electron microscope has an electron gun that shoots electron beams at a specimen. It also has infrared cameras and Robinson detectors. A compound light microscope also has different types of lens while a scanning electron microscope only has one.Both microscopes have a specimen stage but the compound light microscope also has a slide and cover slip. A compound light microscope functions using visible light. A scanning electron microscope sends electron beams onto a specimen.</span>
Answer:
the ductus arteriosus is a normal blood vessel that connects two major arteries — the aorta and the pulmonary artery — that carry blood away from the heart. The lungs are not used while a fetus is in the womb because the baby gets oxygen directly from the mother's placenta.planation: