What Causes the Changing Dark and Light Features Visible on the Martian

question 94

Multiple Choice

What causes the changing dark and light features visible on the Martian surface from Earth?

• A)seasonal growth of vegetation
• B)the flooding of the network of canals from seasonal polar ice melting
• C)lava fields, similar to those found on the Moon
• D)highly cratered and eroded areas that are frequently covered and uncovered by dust
• E)huge storms like those on Jupiter with winds that often reach speeds of hundreds of kilometersper hour

---

Definitions:

T Cell Receptors

Proteins found on the surface of T cells, a type of lymphocyte, that are responsible for recognizing fragments of antigens as peptides bound to major histocompatibility complex (MHC) molecules.

Complement Proteins

A group of proteins in the blood and body fluids that play a crucial role in the immune system by enhancing the ability of antibodies and phagocytic cells to clear pathogens.

Antigen

A substance that, when introduced into the body, stimulates an immune response, specifically the production of antibodies.

IgG

A type of antibody found in all body fluids and the most abundant type of antibody in the human body, playing a crucial role in pathogen defense.