Which of the following is true about an ATP
bound myosin molecule?
a. it is in a high energy state
b. it is in a low energy state
c. it is in a cross-bridge state with actin
d. the myosin binding site is open
e. more than one of these is true
B
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Charles Darwin observed an orchid flower with very long, thin tubes that prevent many species from feeding on the flower nectar and pollinating the flower. He offered a prediction that some species of pollinators would eventually be found that can feed and pollinate through the small tube. You decide to test Charles Darwin's proposal by placing nets over some orchids that allow small pollinators to enter, but prevent the large sphinx moth from entering. You then compare the number of seeds produced by plants with and without the nets. The seed production is
A. a hypothesis. B. a standardized variable. C. a theory. D. an independent variable. E. a dependent variable.
Helicobacter pylori has been associated with ____
a. irritable bowel syndrome b. duodenal ulcers c. peptic ulcers d. HPV e. GERD
The offspring of two heterozygous gray-bodied, normal-winged flies should be 50% graybodied/
normal wings (BbRr) and 50% black-bodied/vestigial wings (bbrr) because these alleles are linked. If a small number, say 15%, of the offspring are instead black-bodied with normal wings, this is most likely the result of: a. crossing-over. b. incomplete dominance. c. codominance. d. an error in meiosis. e. mutation.
Podocytes are located in the wall of:
a. Bowman's capsule.
b. the glomerulus. c. the peritubular capillaries. d. the renal artery. e. the proximal convoluted tubule