Which of the following has not been shown to slow down the signs of aging in humans?

A) eating a very low-calorie diet B) regular exercise
C) protecting the skin from sun exposure D) All have been found to be beneficial to humans.


Answer: A

Biology & Microbiology

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When non-homologous chromosomes exchange parts, a _____ has occurred

A. reciprocal translocation. B. mismatch. C. base exclusion. D. inversion. E. closed reading frame.

Biology & Microbiology

A researcher has mapped the entire genome of an insect. She notices that the genome contains around a thousand copies of a particular DNA sequence. What is the most likely function of this DNA sequence?

A. The sequence most likely has no function. B. Its function is to code for rRNA. C. Its function is to provide antibiotic resistance. D. Its function is to copy and move within the genome via an RNA intermediate.

Biology & Microbiology

Nitrogen is a plant macronutrient

Indicate whether the statement is true or false

Biology & Microbiology

In Figure 43-3 the structure labeled 4 is:

a. the basilar membrane. b. the tectorial membrane. c. the organ of Corti. d. the sterociliary membrane. e. the vestibular membrane.

Biology & Microbiology