Species of rats - unintentional introduction
Invasive water hyacinths - intentional introduction
Flood - loss of habitat
Answer:
when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake.
Explanation:
the part of the sun visible during solar eclipses
Answer:
a) Pyloric sphincter.
Explanation:
The function of Pyloric sphincter is defined as a band of smooth muscle that plays an important function in moving the contents of your stomach in t the small intestine. In other words this muscle is at the junction between the pylorus of the stomach and the duodenum of the small intestine.
Answer:
a) to provide NADPH for reductive biosynthesis and for dealing with oxidative stress
d) to provide ribose-phosphate for nucleotide and nucleic acid biosynthesis
Explanation:
During the pentose phosphate pathway, glucose 6-phosphate is oxidized into pentose phosphates. This pathway uses NADP as an electron acceptor and reduces it into NADPH. The products of this pathway, the pentose phosphates are used by the cells to synthesize nucleic acids (DNA and RNA). The pentose phosphates are also used for the synthesis of nucleotides and coenzymes such as NADH, FADH2, etc.
These synthetic pathways are particularly occurring at a higher rate in the rapidly dividing cells such as the cells of bone marrow, skin. The NADPH formed during this pathway is used by cells as an electron donor for the reactions of reductive biosynthesis. Some of these pathways are the synthesis of fatty acids, cholesterol and steroid hormones. NADPH is also involved in scavenging reactive oxygen species such as oxygen radicals. These ROS are responsible for oxidative stress.
