Which anatomical areas are involved int he entrance of urogenital pathogens?
a. penis
b. vagina
c. cervix
d. urethra
e. uterus
f. ureter
a. penis
b. vagina
c. cervix
d. urethra
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An agent that would work well as an antibiotic against prokaryotic infection would target the
A) 50S large ribosomal subunit. B) RNA polymerase II. C) 40S small ribosomal subunit. D) DNA polymerase. E) mitochondria.
An effective test to determine whether an individual is allergic to a specific substance is to
A. test for high levels of IgG in the serum. B. inject high levels of the allergen so see if the patient goes into anaphylactic shock. C. test for levels of IgE specific for the allergen. D. test for the allergen in the blood.
The process by which the sun's energy generates a water potential difference causing water to evaporate from leaf surfaces is called
a. root pressure b. transpiration c. osmosis d. adhesion of water molecules e. cohesion of water molecules
Use the following description to answer the question(s) below
The cycads, a mostly tropical phylum of gymnosperms, evolved about 300 million years ago and were dominant forms during the Age of the Dinosaurs. Though their sperm are flagellated, their ovules are pollinated by beetles. These beetles get nutrition (they eat pollen) and shelter from the microsporophylls. Upon visiting megasporophylls, the beetles transfer pollen to the exposed ovules. In cycads, pollen cones and seed cones are borne on different plants. Cycads synthesize neurotoxins, especially in the seeds, that are effective against most animals, including humans. Which feature of cycads distinguishes them from most other gymnosperms? 1. They have exposed ovules. 2. They have flagellated sperm. 3. They are pollinated by animals. A) 1 only B) 2 only C) 3 only D) 2 and 3 E) 1, 2, and 3