Campbell was also a researcher who studied desert and coastal plants.

So it was natural for American doctors to study plants in their spare time.

Besides his medical knowledge, according to his record of activities which was extensive for the time, he studied plants.

So, it is worthwhile to study plants and plant products for activity against resistant bacteria.

To become a turkey biologist, I needed at least four years of college education studying plants and animals.

Visitors can not only study animals and plants, but can also learn how to protect these species.

But Mendel had only studied plants, so scientists did not know whether his experiments would hold true for animals.

But that wasn't entirely right, of course, because a botanist only studied plants and learned what he could about them.

He has been looking for pollen, the other standby of people who study ancient plants.

They might study animals, plants, people, rocks, space, water, or anything else they find interesting.