The researcher could look for the presence of proteins, because viruses have a envelope (capsid) composed of proteins that involve their genetic material. The capsid may have a helical or icosahedral structure and is extremely regular. Viroids cannot synthesize any type of protein, so differentiation is possible.
Answer:
The correct answer is b. must be present in a population before natural selection can act upon the population
Explanation:
Genetic variation can be caused by mutation, recombination between chromosomes during meiosis and by fusion of two genetically different gametes during sexual reproduction.
This genetic variation is necessary for the evolution of any population. Natural selection acts on every individual and it decreases the frequency of those alleles that are not suited for the environment and increase the frequency of those alleles which helps the individual to survive in the changing environment.
Therefore genetic variation must be present in the population before natural selection act on the.
Answer:
hope this helps
Explanation:
This medication is used to treat minor aches and pains of the muscles/joints (such as arthritis, backache, sprains). Menthol is known as a counterirritant. It works by causing the skin to feel cool and then warm. These feelings on the skin distract you from feeling the aches/pains deeper in your muscles and joints.
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Answer:
The answer for this question would be option B. The goal of vaccinations is to reduce the number of certain cases of a particular disease. Given that 79% of the children born in the Western Pacific region received a dose of hepatitis B vaccine, and only 11% in one African region, this would mean that the Western Pacific region will have fewer cases of hepatitis B than the African region.
Explanation:
If the answers are:
A.
The Western Pacific region will have more cases of hepatitis B than the African region.
B.
The Western Pacific region will have fewer cases of hepatitis B than the African region.
C.
The Western Pacific and African regions will have same number of cases of hepatitis B.
D.
Nearly 90% of people will be immune to hepatitis B in both regions.
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