Answer:
B. Corundum
Explanation:
Using the Mohs scale of hardness, the mineral has a hardness greater than 6.5 (Steel nail) but less than 8.5 (Drill bit). The corundum has a hardness of 9.0, which means it cannot be scratched by a drill bit, but all the other choices have a hardness scale less than 6.5 but the mineral was not scratched by the nail. So the best answer would be B.
The answer is geological; biological diversity evidence. His hypothesis clarifies that natural assorted qualities come about because of the relatives of nearby or transient ancestors getting to be noticeably adjusted to their differing surroundings. This clarification can be tried by looking at present species and nearby fossils to see whether they have comparable structures, which would show how one is gotten from the other.
Answer:
Photosynthesis and Respiration What is the relationship between. Photosynthesis and cellular respiration are important cells energy processes. They are connected in ways that are vital for the survival of almost all forms of life.
Answer:
This is very vague. I am pretty sure that there are other instructions.