The human immunodeficiency virus (HIV) that causes the disease known as aids selectively infects helper T cells (CD4+).
This retrovirus also infects macrophages and dendritic cells. When CD4+ T cell numbers decrease below a critical level (due to the killing of this cells with different mechanisms), cell-mediated immunity is lost. As a result, the body becomes progressively more susceptible to infections, leading to the development of AIDS.
<span> HIV can be transmitted only via body fluids like blood, semen, pre-seminal fluid, rectal fluids, vaginal fluids, and breast milk, which means that people usually get or transmit HIV through sexual behaviours and use of the needle. For HIV infection, these fluids must come in direct contact with a mucous membrane or damaged tissue. Another way is to be directly injected into the bloodstream (from a needle for example).</span>
Answer:
1000
Explanation:
The average beak depth will Initial average depth: 9.95 decrease because the finches with small Initial range of beak depths: 7 beaks are best suited to finding food in Abundant rainfall.
Cultivated crops usually have fewer roots such as corn in a moist or wet soil. <span>To have more hair roots needs more air and oxygen helps to make it happen. </span><span>But a wet soil doesn't help add more roots. </span>
Explanation:
In the given question, the options are not provided in the question and neither they are found anywhere therefore based on the previous knowledge this can be answered.
Since both the prokaryotes and eukaryotes are living therefore they perform the metabolism or chemical reactions in the form of process.
Both eukaryotes and prokaryotes perform almost similar process like the cellular respiration, photosynthesis by green colored organisms, the Central dogma related process like the replication, transcription and translation.
The central dogma related processes differ in these process only in terms of the site they are performed and a few modifications which are characteristics of the eukaryotic cells.
In prokaryotes, the transcription and translation are coupled and takes place in the cytosol whereas in eukaryotes transcription in the nucleus and translation in the cytosol.
Also in eukaryotes, modifications like the splicing, alternative splicing, capping and tailing are observed which are not observed in the prokaryotes.
Answer:
B. The products of photosynthesis are the reactants of cellular respiration.
