A) a common ancestor
Homologous structures are structures that are similar in related organisms. There is a basic pattern of bones which can be inherited from a common ancestor
The answer would be car tired break up the ground, causing increased erosion. Rubber in a tire form can not get plants sick(unless it is carrying a disease), plants are used to dappled sunlight so that wouldn’t be a problem, increased fuel usage may be true however it is no concern to the park rangers
I think its true because oxygen makes up about one-fifth of the Earth's atmosphere. Nearly 90 percent of the weight of the oceans is due to oxygen. In addition, oxygen is thought to be the third most abundant element in the universe and in the solar system
Molecules move freely when there in gas form
Your answer for this question is paper which Is A
