During this morning's presentation, Henry for over an hour.
Choose the form of the verb that BEST completes the sentence.
A) speaking
B) speaks
C) spoke
D) spoken

What is a mechanism by which organisms maintain homeostasis when the level of one substance influences the level of another substance or the activity of an organ.

Charles darwin time connective and dates

Choose a different word from those you selected to study in this unit and explain where you have heard it used previously write this sentence you heard with the vocabulary word in it and include who use the word and when we do used to use proper grammar and spelling