Heterotrophs depend on autotrophs for chemical energy in a food chain. Which statement describes how autotrophs depend on heterotrophs for survival?

Free brainliest! what is a characteistic of the american stradfordshire?

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons

Polar zones are cold and tend to be dry because of a pressure system of cold. low high