An older engine that uses flat-bottom lifters should have an adequate amount/number of _in its oil or oil- additive. A. ZDDP (zinc) B. polyalpholefin (POA) C. diesters D. viscosity1​

Which scenario describes intraspecific, indirect competition? a. a peacock defends its territory against another peacock. b. lions and hyenas compete for the same prey animals. c. a male black bear eats fish in an area of a lake, so other black bears can’t. d. different species of birds fight over spilled popcorn on the ground.

These three organisms are interdependent on each other for their survival. what will happen if foxes are eliminated from the region? a. there will be more rabbits and less grass in the region. b. there will be more grass and fewer rabbits in the region. c. there will be fewer rabbits and less grass in the region. d. there will be more rabbits and more grass in the region.

Astudent randomly draws a card from a standard deck and checks to see if it's his favorite suite he then returns the cards to the deck