. For a woman to get pattern baldness she must ____
a. have the SRY gene
b. be younger than 40 years old
c. possess two copies of the allele
d. have a sex-limited chromosome arrangement
e. have Y inactivation
ANSWER: c
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The nephridium of molluscs is part of the:
a. reproductive system. b. excretory system. c. nervous system. d. digestive system. e. defense system.
The ____, labeled as ____ in the accompanying diagram, is a channel for urine to flow from the kidney to the urinary
bladder.
a. urethra; B b. urethra; D c. ureter; D d. ureter; B e. ureter; C
Govingee, 35 years old, has recently become lethargic, and his face feels very cool but puffy to the touch. When you take his pulse, you note that it seems abnormally low. What condition might Govingee have?
A) low thyroid hormone B) excess calcitonin C) accumulating aldosterone D) low growth hormone
Phage T4 protects its DNA from cleavage by host restriction enzymes by ________.
A. substituting glucosylated hydroxymethylcytosine for cytosine B. replicating very rapidly C. inactivating restriction enzymes D. methylating bases