Basal cell carcinoma, squamous cell carcinoma and melanoma are all types of skin cancer. The primary cause of these types of cancer is excessive sun exposure. Skin Cancer Characteristics

What effect does the sun have on the skin to cause cancer?

Group of answer choices

Sunburn removes the upper layers of the skin.

The sun’s rays cause mutations in the skin cells.

Chemicals from the sun change the skin cells.

The heat from the sun interrupts the cell cycle.

mutations may be driving cancer in about 4-8% of patients with advanced HNSCC. See which tests already include HRAS on their panels.

so its skin cancer

google my dude. if it doesn't show up ask me.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: