Simple, single-celled organisms that lack a nucleus are referred to as which of the following?
a. bacteria
b. fungi
c. prokaryote
d. eukaryote
c. prokaryote
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Mobile DNA elements are more common in the genomes of
A) Archaea. B) hyperthermophiles. C) rapidly evolving species. D) pathogens.
Which of the following is associated with DNA?
a. ribose b. deoxyribose c. single stranded d. uracil
The water-vascular system is used primarily for:
a. excretion of excess water b. locomotion c. respiration d. circulation e. sensation
What criterion is used to categorize the skeleton into axial and appendicular?
A. whether the bones lie on the midline or on a girdle B. whether the bones articulate with the pelvis or not C. whether the bones contain red bone marrow or yellow bone marrow D. whether the bones are flat or long E. whether the bones are weight bearing or not