Which of the following possibilities is the best indicator of an organism's evolutionary fitness?
A) the number of gametes it produces during the years when it is likely to be reproducing
B) the number of offspring it produces over its lifetime that survive to breed.
C) the number of offspring it produces over its lifetime
D) the number of eggs it produces over its lifetime
Answer: B
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Insulin lowers glucose concentration in the blood, by binding to receptors on liver cells, adipose tissue, and skeletal muscle cells. What type of receptor does insulin bind to?
1.adrenergic receptor 2.G-protein–coupled receptor 3.internal receptor 4.receptor tyrosine kinase
What organelle inactivates toxins?
a. nucleus b. mitochondria c. peroxisomes d. lysosomes e. Golgi body
This phenomenon, which is a medical emergency, involves the peeling of the retina away from the choroid
A) retinal detachment B) optic degeneration C) rhodopsin breakage D) otitis media E) myopia
During the spring calving season, a ranch hand begins to run a fever and feel nauseous and achy. After he develops a headache and vomiting, he goes to a clinic. A microscopic exam of a urine sample reveals long thin microbes which move very rapidly in a
corkscrewing pattern. The man may have contracted A) lymphogranuloma venereum. B) glomerulonephritis. C) leptospirosis. D) staphylococcal toxic shock syndrome. E) trichomoniasis.