Example of For a plant, sunlight is an
a. internal stimulus
b. external stimulus
C.
homeostasis
d. reproduction

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

What is an endocrine function? (apex) a.esophageal glands release mucus into the esophagus b.salivary glands release saliva into mouth c.swear glands release sweat to the skin d.the pineal gland releases melatonin into the bloodstream

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?