Explanation:
Biologists have discovered that the reason behind the decline of fireflies is habitat loss, light pollution and excessive light; excessive light can disrupt the insects mating ritual.
The answer is pheromones. Hope that helps :)
thymine
adenine
cytosine
guanine
Explanation:
uracil is not because uracil is only RNA.
The germ theory of disease states that many diseases are caused by microorganisms.