Blood is considered<span> a </span>connective tissue<span> for two basic reasons: ( 1 ) embryologically, it has the same origin ( mesodermal ) as do the other </span>connective tissue types<span> and ( 2 )</span>blood<span> connects the body systems together bringing the needed oxygen, nutrients, hormones and other signaling molecules, and removing the wastes .</span>
The answer would be '<span>A.<span>The genes for melanin pigmentation remain turned on and prepare more melanin than usual to protect the skin from photo-damage when it is exposed to sunlight for long time.' </span></span>
