An allele that is always expressed when the allele is present
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Even when asymptomatic: <u>HIV </u>can be actively multiplying and killing cells in the immune system.
<h3>Effects of HIV </h3>
Human immunodeficiency virus is a virus which attacks the immune system of an infected body by killing cells in the immune system while multiplying rapidly. In the early stages of the infection the infected person might be asymptomatic but the virus will spread rapidly leading to an immune deficiency state.
Hence we can conclude that <u>HIV </u>can be actively multiplying and killing cells in the immune system.
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Answer: c.The caterpillars gain energy directly from the orchids.
A food chain is a linear sequence of transfer of food and energy when one organism is consumed by another organism. A food chain maintains the balance of abundance of organisms forms on earth as one organism is fed by the other.
In the given food chain, the caterpillars gain energy directly from the orchids is the correct option because the population of caterpillars eat upon the orchid plants. The food in the form of orchid plants is necessary for obtaining energy by the caterpillars.
The answer is b when a cold air mass invades a warm air mass