The dense haris around the flowers of the woolly lousewort are vital because they<span> trap heat from the sun. So the correct option is B. Hope this helps a lot </span>
Earth's history. In the worst one, 250 million years ago, 96 percent of marine species and 70 percent of land species died off. It took millions of years to recover.
Answer:
option A
Explanation:
option A is the correct answer of this question .
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It provides an objective, standardized approach to conducting experiments and, in doing so, improves their results. By using a standardized approach in their investigations, scientists can feel confident that they will stick to the facts and limit the influence of personal, preconceived notions.
