Which of the following statements about sponges is correct?

A) Sponges have many nerve fibers.
B) Sponges have well-developed muscle fibers.
C) Amoeboid cells are the sites of digestion in a sponge.
D) Sponges only reproduce asexually.
E) If a sponge cell becomes separated from the sponge body, it dies immediately.

Preimplantation genetic diagnosis is done:

A) on cells of an in vitro fertilized embryo
B) in the womb, before birth
C) after a woman is pregnant, but before the embryo implants
D) with the help of ultrasound
E) before fertilization on the sperm and the egg

A yellow dog contract is a promise by employers to hire only union workers at their place of business.

Decreased blood pressure in the afferent arterioles results in

A) increased renin secretion.
B) decreased ADH secretion.
C) suppression of thirst.
D) stimulation of the parasympathetic nervous system.
E) decreased renin secretion.

Which of the following lists includes only monosaccharides that are isomers of one another?

A) Glycogen, glucose, sucrose
B) Starch, glycogen, cellulose
C) Glucose, fructose, galactose
D) Ribose, glycogen, glucose
E) Deoxyribose, glycogen, starch

Steroid hormones always have the same complex of four-carbon rings.

Branches of the ________ nerve are anesthetized before a doctor performs an episiotomy for childbirth.

A) genitofemoral
B) gluteal
C) cutaneous femoral
D) pudendal
E) common fibular (peroneal)

During a recent Ebola outbreak, clinicians attempted to collect "blood products" to help those infected with the virus fight the infection. Which of the following best relates this treatment to adaptive immunity?

A) The clinicians were hoping to use artificial passive immunity by introducing antibodies from those that survived the infection to individuals that were currently infected.
B) The clinicians were hoping to use artificial active immunity by introducing antigens from those that survived the infection to individuals that were currently infected.
C) The clinicians were hoping to use natural passive immunity by introducing antibodies from those that survived the infection to individuals that were currently infected.
D) The clinicians were hoping to use natural active immunity by introducing antibodies from those that survived the infection to individuals that were currently infected.