Are my bold answers correct? What is #1? When a soldier locks on to an alien, th

Question

Are my bold answers correct? What is #1?

When a soldier locks on to an alien, the soldier makes many duplicate copies of itself, called clones. However, this takes time. Sometimes, the aliens can cause great damage, or even destroy the space station before there are enough soldiers to neutralize them. Therefore, the Intergalactic Physician may vaccinate the space station before the aliens arrive to prevent them from doing any damage or destruction. This is done either by sending dead, inactivated aliens, living, attenuated aliens that were captured and disarmed (have no weapons), or pieces of dead aliens called antigens aliens to the space station. The soldiers on the space station lock on to these aliens and duplicate themselves. Then, when the ‘real’ aliens, with real weapons, try to invade the space station, there are already many soldiers ready to neutralize them and no damage is done to the space station. Even after the attack is over, a few soldiers remain on “combat alert” and are ready should a second invasion occur. These soldiers are called_______1_______.

Options:

adaptive immune response

• antibodies

antigens

• IgG (antiserum or antitoxin)

• innate immune response ?

autoimmunity ?

B cells ?

cytotoxic (CD8) T cells ?

helper (CD4) T cells ?

• memory B and T cells

• MHC?

• sub-unit?

Explanation / Answer

The first two are correct, but the third one is sub-unit alien.

1. Even after the attack is over, a few soldiers remain on “combat alert” and are ready should a second invasion occur. These soldiers are callrd memory B and T cells.

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