Scientists' understanding of viruses has advanced greatly in the last fifty years. Which statements give evidence to support the classification of viruses as nonliving? Choose all the statements that apply

Which of the following situations describes a adaptation for a mole? question 2 options: a mole is blind and cannot see underground. a mole is bright and attracts the attention of predator birds. a mole has a sensitive sense of smell to it find food underground.

The “ecological footprint” left by a citizen of a developed nation is about four times larger than that left by a citizen of a developing nation. why is this the case?

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.