Answer: Despite over a century of research and development, currently high-speed maglev cars are only available in China and maglev transport systems are now operational in just three countries
The myelin sheath is an extended and modified plasma membrane that is spirally wrapped around the axon of the neuron. The primary purpose of the myelin sheath is to a. insulate the neuron so it can transmit information more efficiently and quickly. A myelinated neuron can transmit the electrical impulses at the speed of 400 Km/h whereas the speed is just 4 Km/h in a non-myelinated or a damaged neuron.
Evolutionary biologists theorize that
the first living organisms on earth are single-celled prokaryotes. The two
prokaryotic domains are archaea and bacteria. Bacteria varies from
disease-causing pathogens to valuable photo synthesizers and symbionts while archaea
are diverse, but not pathogenic and they have the characteristics to live in
extreme environments. Moreover, the presence of prokaryotes is highly
dominating for they can be found everywhere even inside our bodies but they are
difficult to count, classify or detect.
The answer is option B "declining number and variety of the species in an area." Biodiversity is a variety of life for example a ecosystem has many species which makes it a biodiversity. Now a loss of a biodiversity would be loosing a huge amount of species in that area or ecosystem which would mean the answer is option B.
Hope this helps.
Answer:to explain why an experiment is being done
Explanation: