Answer:
The answer is <em><u>D.
</u></em>
Explanation:
Viruses can evade the processing and presentation of antigens, for example by interfering with the expression of MHC class I proteins, although this increases their susceptibility to be detected by natural killer cells (NK). However, some members of the herpesvirus, papillomavirus, retrovirus, poxvirus and flavivirus families have also developed strategies to escape the attack of NK cells and promote their survival, inhibiting cell apoptosis. Finally, some pathogens often change surface antigens frequently, as in the case of influenza viruses (orthomyxovirus).
The human immunodeficiency virus (HIV) affects CD4 + T cells and degrades the host's ability to counterattack with a strong cell-mediated immune response. There are so many tactics of immune evasion used by HIV, which have so far hindered the development of an effective vaccine.
Answer: False
Explanation:The basilar membrane is located in the cochlea interior. It has variation in the stiffness near to the oval window and turns floppiest near to apex. Basilar membrane is active near the stiff area which is oval window when it is exposed to high frequency and thus has experiences the excitation of cells of the nerves .
Therefore the apex being less stiff is displaced by the low frequency sound in the basilar membrane, so the statement given is false.
<span>Plastic is made from Petroleum Oil</span>
The answer is c) ocean waves
