What is the primary method by which zebra mussels have traveled beyond the Great Lakes?
a. attached to animals
b. attached to boats
c. attached to plants
d. via water currents
B
You might also like to view...
Thymine dimers are caused by
A) X-rays. B) active oxygen species. C) a mutagen such as ethylmethane sulfonate (EMS). D) depurination. E) UV light.
Which of the following prokaryotic nutritional
groups use organic substances for carbon and photons for energy? a. photoautotrophs b. chemoautotrophs c. photoheterotrophs d. chemoheterotrophs e. none of these
There are many organs and glands of the endocrine system, but which one is the master controller?
A) Pituitary B) Thyroid C) Hypothalamus D) Pancreas
Which of the following types of mutations could result in a frameshift mutation?
A. either an insertion or a deletion of a base B. a base insertion only C. a base deletion only D. deletion of three consecutive bases E. a base substitution only