Wool yarn can be substituted for the human hair in a hygrometer why would this work?

How do the sperm cells get from the stigma to the ovules? a. they slide down the petals to the bottom of the flower. b. they travel through pollen tubes. c. they travel along filaments. d. insects carry the sperm cells from the stigma to the ovules.

Part of the elbow is formed by the end of the humerus. what do you call this part?

Agriffin is a mythical creature that appears in many stories. it has the head of an eagle and the body of a lion. what role if any could the griffin have in the science of biology