What is one distinct disadvantage of sexual reproduction?
a) organisms that sexually reproduce do not produce much genetic variety.
b) sexual reproduction, unlike asexual reproduction, can rapidly produce too many new offspring.
eliminate
c) sexual reproduction requires two individuals, which may be difficult for endangered or uncommon species of organisms.
d) sexual reproduction produces offspring that are all equally vulnerable to the same diseases, predators, and other environmental pressures.

An 80-year-old woman comes to the urgent care clinic with dyspnoea on exertion. on physical examination, her blood pressure is 100/70, and her pulse is 75. she has no pulsus paradoxus. her jugular veins are distended, and she has distant heart sounds. in addition, she has extra third and fourth heart sounds. her liver is enlarged, and she has pedal oedema. she has occasional premature ventricular contractions on her electrocardiogram. a chest x-ray reveals clear lung fields with a dilated cardiac silhouette. her echocardiogram reveals ventricular walls with a "speckled pattern". which of the following is the most likely diagnosis? - alcoholic cardiomyopathy- amyloidosis- haemochromatosis- tuberculosis- viral myocarditis