Answer:
The spread of many viral diseases can be prevented by hygienic factors such as efficient sanitation facilities, effective waste disposal, clean water, and personal cleanliness. Active immunization by vaccines (antigen-containing preparations that elicit the synthesis of antibodies and thus immunity) has been useful in preventing common epidemics caused by acutely infectious viruses.
Explanation:
Mark as brainliest please
Answer:
Chromosomes that have the same sequence of genes and the same structure are <u><em>homologous chromosomes. </em></u>
Explanation:
Homologous chromosomes can be described as the chromosomes which carry the same genes at the same loci. They are identical to one another. One of the homologous chromosomes arises from the female and the other one of the homologous chromosome arises from the male during meiosis.
The crossing over between the DNA from homologous chromosomes is the main reason for the wide genetic diversity which occurs due to meiosis.
For example, humans have 23 pairs of homologous chromosomes and one pair of sex chromosomes.
The Earth Summit is also known as Rio de Janiero de Earth Summit, it is one of the major United Nations Conference and was held last June 3-4, 1992. There were:
1. 172 governments who participated
2. 2,400 non-governmental organizations
3. 17, 000 people at the parallel NGO
<em>For example,</em>
<em> consider a mountain whose summit is 5,000 feet (1,500 m) in elevation, but somewhere on the way up, the trail goes back down 250 feet (76 m). ... </em>
<em>If one hikes over five hills of 100 vertical feet each, the cumulative elevation gain is 5 × (100 feet (30 m)) = 500 feet (150 m).</em>
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Answer is C bc of the fact of diameter
