What term refers to the pattern of settlement and is described as regular, clustered, or random?

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is