The blood vessels that supply oxygenated blood to the heart tissue itself are the
A. pulmonary veins.
B. coronary arteries.
C. coronary sinuses.
D. pulmonary trunks.
E. venae cavae.
Ans: B. coronary arteries.
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Which of the following organs is not found in the abdominal cavity?
a. Pancreas b. Large intestine c. Liver d. Stomach e. Bladder
Which procedure is the least-invasive method of assessing fetal health while development is still occurring?
A. amniocentesis B. chorionic villus sampling C. karyotyping D. ultrasound
Why are the sterile transgenic salmon of concern for local streams?
A) Transgenic salmon may introduce resistant bacteria to the ecosystem. B) Transgenic salmon may cause eutrophication of the local streams. C) Transgenic salmon may spread cancer-causing genes in the fish population. D) Transgenic salmon may still reproduce with wild species and disrupt the food web.
In Griffith's experiments,
A. mice infected with heat-killed virulent bacteria and live nonvirulent bacteria developed pneumonia and died. B. nonvirulent bacteria transformed the virulent bacteria into a nonvirulent variety. C. mice infected with heat-killed virulent bacteria and heat-killed nonvirulent bacteria developed pneumonia and died. D. mice infected with live nonvirulent bacteria developed pneumonia and died.