Which of the following statements about screening for prostate cancer is most accurate?
select one:
a. bph and prostatitis can confound prostate screening results.
b. a positive prostate-specific antigen (psa) test is definitive for prostate cancer.
c. digital rectal examination detects the majority of new cases of prostate cancer
d. digital rectal examination and psa testing have been proven ineffective.

d. Digital rectal examination and PSA testing have been proven ineffective.

Explanation:

The prostate is a small gland in the male reproductive system and is usually the shape and size of a walnut. Current methods to determine if a prostate has become cancerous include a physical exam (known as a digital rectal exam or DRE), magnetic resonance imaging, a biopsy, or tests to determine prostate-specific chemical antigen (PSA) levels in the blood.

Prostate cancer is considered a cancer of the elderly, since most cases are registered in men over 60 years. The most effective techniques for screening for this cancer are annual screening exams - which include the blood-drawn PSA test and digital rectal touch - are recommended for all men aged 50 and over.

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.