Answer the following questions with reference to the joints listed below.
A. Examples are the joints connecting skull bones.
B. Dense connective tissue holds bones in place.
C. Examples are the joints that connect the ribs to the sternum.
D. Allows for a variety of movements (for example, ball-and-socket joints).
E. Fluid filled space in this joint provides lubrication.
A. fibrous joint
B. fibrous joint
C. cartilaginous joint
D. synovial joint
E. synovial joint
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In genomic imprinting, the expression of a genetic disorder depends on
A) the age of the mother when she became pregnant. B) whether the trait is X-linked or autosomal. C) which parent transmits the disease-causing allele. D) the number of pseudoautosomal genes transmitted.
Which species of Epsilonproteobacteria is responsible for causing peptic ulcers in humans?
a. Campylobacter jejuni b. Helicobacter pylori c. Myxococcus xanthus d. Pseudomonas aeruginosa
What explanation can you give for why the sodium-potassium pump does not run out of ions to move in or out of the cell?
A. The cell continuously produces more ions to replace those moved by the pump, maintaining a constant supply. B. Leak channels are always open, allowing the passage of sodium ions (Na+) and potassium ions (K+) across the membrane. C. Many of the ions moved in or out then diffuse passively back through the membrane in the opposite direction.
Approximately ____ Y-linked genes have been discovered
a. 10 b. 20 c. 60 d. 80 e. 120