Answer:
Renewable energy resource as an obstacles for the growth of migratory salmon populations: It is now believed that the reduce access to spawning grounds and nursery areas, leading to a decrease in migratory fish populations is due to the dam structures of large storage-type schemes, which can create great obstacles for the movement of migratory fish species.
Explanation:
- Storage-type schemes ( big dams) can significantly change the downstream flow regime,and may also alter water temperature and quality, and even make it inhabitable for fish to live.
- As the storage of water can be linked with high evaporative losses, which in turn results in high life cycle water footprints compared to other sources of electricity.
<u>Run-of-river (ROR) schemes are HEP schemes: </u>
They operate without water storage, using the flow within a river channel.They are ecologically friendly and do not disturb the natural mechanism for the migrating salmons.
Working Principle:
They are normally used to regulate water levels, which allows a proportion or part of flow to be diverted down a secondary channel to a turbine before it is returned to the main channel further downstream.
There are some modern turbine types used in ROR HEP(hydroelectric power) schemes, which are also designed to allow fish to pass through the system unharmed if the fish do pass through the intake screens.
Answer:
I think the answer is D: Infrographic that shows carbon moving through ecosystems
Acute HIV infection is the first phase of HIV infection. The early HIV test can detect HIV during the acute HIV phase. The best test for detecting HIV infection is the early HIV test (also known as NAAT/RNA testing)
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Answer:
B. nuclease (destroys DNA and RNA)
Explanation:
Viruses are the particles that contain a protein coat called the capsid. Inside the capsid, viruses have their genetic material. Viruses may have single-stranded or double-stranded DNA molecules or single-stranded or double-stranded RNA molecules as their genetic material. Therefore, to destroy viruses, one must target their genetic material. Nucleases are enzymes that digest nucleic acids (DNA and RNA). The use of nucleases would destroy the genetic material of viruses and would be most effective to control them.
Answer:
Option 2, Arousal
Explanation:
Reticular activating system (RAS) or the ascending arousal system consists of nuclei and tracts and is involved in the regulation of wakefulness, sleep aspects and arousal.
RAS is located in the mesopons and interacts with the basal forebrainand thalamocortical systems. It activates the cerebral cortex and thereby maintain the consiusness. The neurons located at the pontomesencephalic junctionparticipates in this activity of arousal.
Hence, option 2 is correct
