Answer:
Evolution occurs due to change in the characteristics of life.
Explanation:
The shared characteristics of life provide evidence for evolution. These shared characteristics are reproduction, homeostasis, heredity, growth, development and adaptation which occurs through evolution. The evolution mainly occurs due to changing environmental conditions. Some sea organisms such as whales evolve from land animals having four legs through the process of evolution. The environment of sea is responsible for the formation of gills and other body structure in order to survive in the water.
Answer:
When populations are separated by a barrier forming a new species
Answer:
A pandemic is an epidemic disease extended across wide regions, thereby affecting many countries and even continents, while endemic diseases affect the people from only one country or a specific region. Human Immune Deficiency (HIV) is an RNA virus whose life cycle is composed of the following stages: 1) binding to the cell host and membrane fusion, 2) subsequent reverse transcription into DNA and integration into genome host 3) proliferation (i.e., successive replication cycles) by using the cellular machinery of the host 4) new assembly and budding of the virus. The acquired immune deficiency syndrome (HIV/AIDS) occurs when the host immune system is seriously damaged by the HIV infection, this being the latest stage of infection. It is known that HIV/AIDS is more prevalent in the female population, while according to ethnic groups, it is more prevalent in African-American and Hispanic/Latino populations in the USA. The life expectancy in HIV-infected patients has notably improved in the last years and, currently, people with this disease can expect to live over 70 years or even more.
There may be a shortage of clean drinking water in the future
Answer: the cell divides.
Explanation:
