What does adenine pair with in DNA?
1. adenine
2. guanine
3. cytosine
4. thymine

Write a paragraph at least 5 sentences “why all vaccinations should be mandatory”

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

The galapagos island contain 13 species of finches four of the species are seen here it is believed that all of the species had one common ancestor and overtime