Answer: e. all of these
Prions _________.
a. are believed to be the pathogen that causes variant Creutzfeldt-Jakob disease.
b. are resistant to high temperatures and drying.
c. are proteins that are capable of replicating themselves.
d. are normal brain proteins that have an incorrect shape.
e. all of these
Biology & Microbiology
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Through evolution, the hindlimbs of cetaceans have been modified, eventually becoming
a. flippers. b. tail. c. non-existent. d. flukes. e. enlarged.
Biology & Microbiology
Which two properties of water enable water to flow up from roots to feed plants?
a. Cohesion and adhesion b. Adhesion and polarity c. Polarity and cohesion d. Solvency and temperature control
Biology & Microbiology
You are feeling ill, so you visit a physician. The physician takes your temperature, blood pressure, and pulse and orders blood tests and urine analysis to determine more about your condition. The results of all of these observations and tests will help the physician assess why your body is temporarily out of "normal" conditions, or
A. adaptation. B. growing ability. C. natural selection. D. organism level of complexity. E. homeostasis.
Biology & Microbiology
The likelihood of men over the age of 40 developing an enlarged prostate (often called benign prostatic hyperplasia, or BPH) increases with age
An enlarged prostate is not the same as cancer, and it does not increase a man's risk for developing prostate cancer. BPH is so common that it has been said that all men would have an enlarged prostate if they were to live long enough! Some of the complications of BPH are increased frequency of urination, reduced urine output, and uncontrolled "dribbling" after urination. After an enlarged prostate is surgically removed (a prostatectomy), these symptoms disappear. Based on this scenario and your knowledge of the urinary system, which of the following must be TRUE? A) Prostate enlargement reduces the ability of the kidneys to filter wastes from the bloodstream. B) The prostate is the only gland that releases ADH, which decreases urine production. C) An enlarged prostate presses on the urethra and bladder, affecting urination. D) The prostate is part of the kidney and assists in urine production.
Biology & Microbiology