Check all statements that are true. question 2 options: too much nitrogen and phosphorous in the water cause algae to bloom. the nitrogen and phosphorous usually get into the water supply from point sources. algae blocks sunlight from reaching the native water plants, removing the food supply for fish. when large algal blooms die off, the oxygen levels in the water drop and fish suffocate. large algal blooms can be harmful to people and to the commercial fishing industry.

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

correct answer is a. and d.

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.