These vessels take the blood back most directly to the heart
A) arteries
B) venules
C) veins
D) arterioles
C
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Anatomical features that show an underlying structural similarity even though their superficial structure is different are termed ________ structures
A) homoplasic B) homologous C) symplasic D) dependent
The drug diethylstylbestrol, or DES, mimics estrogen and interferes with the development of the fetal uterus. What is this drug considered?
A) a hormone B) as good as estrogen C) an endocrine disruptor D) a good form of birth control
A man is brought to the hospital suffering from nausea, vomiting, and severe stomach cramps. He had recently returned from a hiking trip in northern Minnesota
A sample taken from the man shows a single-celled flagellate organism that lacks mitochondria but has two nuclei. This organism is a(n) A) excavate. B) apicomplexan. C) diatom. D) euglenozoan. E) green alga.
Why is immersion oil often used when viewing specimens under the microscope?
A) To increase the resolution B) To slow bacterial movement so you can see cells better C) To stain the cells blue D) To reduce the amount of heat reaching the slide from the light source E) To prevent the smear from drying out