Which of the following would be least likely to be true of an animal that is a regulator?
a. It can live in a variable climate because of its homeostatic mechanisms.
b. It may have a larger geographic range than a conformer.
c. It may acclimatize to winter by increasing the thickness of its insulating coat.
d. It has lower energy requirements than a conformer of similar size.
e. It may use behavioral as well as physiological mechanisms for responding to changing conditions.
Answer: d. It has lower energy requirements than a conformer of similar size.
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Mitochondrial DNA studies were used to determine that Homo sapiens evolved in Africa and only later did they become established elsewhere
A. true B. false
Behaviors that appear to be genetically programmed are called
A. innate. B. ultimate. C. fixed action patterns. D. reflexes. E. voluntary.
Which statement is not true about the urinary microbiome?
A) Shifts in microbiome composition may be associated with physiological concerns such as incontinence. B) Most species can be cultivated using standard laboratory techniques. C) The most consistently detected species are Lactobacillus and Streptococcus. D) The species composition is consistent throughout the urinary system, across the lifespan or from person to person. E) The healthy urinary tract was believed to be sterile until molecular methods of analysis became available.
In principle, how many different cell types can an organism having four different types of transcription regulator and thousands of genes create?
(a) up to 4 (b) up to 8 (c) up to 16 (d) thousands