Jesse is studying a blood sample that has only antigen b on the red blood cells and antibody a in the plasma. what is the type of the blood sample? 1.) a+ 2.) a- 3.) b+ 4.) b-

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

As a result of climate change earths temperature is rising and sea ice is melting what is a likely effect? answer : populations of walruses and polar bears will decline