Chapter 19- The Cardiovascular System: The Blood Choose the single best answer to each question.

1) Which of the following is NOT function of blood?

A) transports nutrients, wastes and gases
B) regulates pH
C) defends against infection
D) promote blood loss
E) distribute heat

How are gene and protein sequences used to classify organisms?

Which are characteristics of flukes? check all that apply. a they are free living. b they are a type of flatworm. c they reproduce sexually. d they have eyespots. e they are segmented.

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.