When confronted by an invader, an is produced to protect the body from future invasions?

an Antibody!

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Antibody

Explanation:

The pathogen or an invader when enters the body it gets encountered by the immune cells in the body. The lymphocytes when interacts with the antigen/pathogen or invader, it produces a immune response.

The immune response results in production of memory cells and antibody producing cells. The antibody producing cells forms antibody which kills the invader and the memory cells generates memory to prevent the body when second time encounter occurs with the same invader.

b is dominant over the allele for the white fur.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.