Duchenne muscular dystrophy is caused by a
mutation of a gene on the ___ chromosome.
a. X
b. Y
c. 21st
d. 1st
e. 18th
A
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In a urine test, what may indicate damaged kidneys?
a. urine high in proteins b. high sugar content c. acidic urine d. alkaline urine e. chemicals present in urine
In males, sterilization involves a vasectomy, which removes a portion of what structure?
A. Epididymis B. Sertoli cells C. Vas deferens D. Seminiferous tubules
In horsetails, lycophytes, and whisk ferns, ____.
A. spores give rise to photosynthetic gametophytes B. the main plant body is a gametophyte C. the sporophyte bears sperm- and egg-producing organs D. the gametophyte is the dominant stage in the life cycle E. the gametophyte produces spores
Which bone(s) is (are) part of the pelvic girdle?
A. coxal bones B. scapula C. femur D. clavicle E. talus