Oral polio vaccine is highly effective and inexpensive (about US$0.10 per dose, or US$0.30 per child and its availability has bolstered efforts to eradicate polio. A study carried out in an isolated Eskimo village showed that antibodies produced from subclinical wild virus infection persisted for at least 40 years. Because the immune response to oral polio vaccine is very similar to natural polio infection, it is expected that oral polio vaccination provides similar lifelong immunity to the virus.
Contact immunity to polio can occur when attenuated poliovirus derived from the oral polio vaccine is excreted, and infects and indirectly vaccinates unvaccinated individuals.
Answer: A: Detecting and locating objects and moving animals in the water
Explanation:
Its used for sensing tiny vibrations in the water
The endocrine system is made of glands that secrete hormones. These hormones help regulate the organs and cells activity. The hormones among other things control your metabolism.
Answer:
Option c. Only the haploid organism may also reproduce asexually.
Explanation:
It is scientifically approved that algae and fungi are able to form true asexual spores. This process of spore formation involves mitosis and resultant spore is called mito-spore which develop into new offspring.
Reference: Smith, B. A., and DANIEL D. Burke. "Evidence for the presence of messenger ribonucleic acid in Allomyces macrogynus mitospores." Journal of bacteriology 138.2 (1979): 535-541.
