The endocrine gland secretes hormones into the bloodstream.

It is important to generalize the results of the study to a larger population.

She has a maternal instinct and takes care of everyone like a mother.

Conservation is important for preserving our natural resources.

The lion is a fierce predator in the African savannah.

The goat is grazing in the field.

During the professor's lecture, a student's unexpected utterance caused the entire class to burst into laughter.

The development of electric vehicles has greatly improved mobility.

The mortality rate in the country has been steadily decreasing over the years.

Microorganisms are too small to be seen with the naked eye.