The genes for melanin pigmentation remain turned off and synthesize more melanin than usual to protect the skin from photo-damage when it exposed to sunlight for a long time.
Hyaline cartilage
Monkeys live in all types of environments, and most of them are well lit by the sun. Monkeys that live in a heavily forested areas can and do generally climb up into the canopy and can easily hand out in the sunlight.
Hyaline cartilage is the correct answer to this description of connective tissue.
Cartilage, hyaline especially
The superlative of heavily is "most heavily."
Usually, methods such as temperature flaring (or simply burning) works. Otherwise you can sand it heavily until it comes off.
more heavily, most heavily
poluted, but not heavily
more heavily
It is easliest to see sun damage to the paint of black vehicles. Black can change to a dull and faded shade, easier than other colors, especially when heavily exposed to the elements.
Terrae are light colored highland or mountainous areas of a moon or planet. A terra may also be a region of heavily overlapping creaters that appears as a bright area on the surface of Venus, Mars, or the Moon.
more heavily