When an insect arrives on an island and evolves into a new species that is different from its ancestor on the mainland, the two species are kept apart by ________ isolation
Fill in the blank(s) with correct word
geographic
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Congenital non-spherocytic haemolyic anaemia (CNSHA) is caused by a mutation of one or more of the enzymes of the glycolytic pathway. The most common is a mutation in the gene for pyruvate kinase resulting in a non-functional enzyme. Patients with CNSHA often show marked ATP deficiencies. Given what you know about this enzyme’s action, why would this be expected?
a. Pyruvate kinase produces ATP when it phosphorylates glucose to glucose-6-phosphate. b. Pyruvate kinase uses excess ATP when it phosphorylates fructose-6-phosphate. c. Pyruvate kinase produces ATP when it generates pyruvate from phosphophoenolpyruvate (PEP). d. Pyruvate kinase uses excess ATP when it catalyzes the dehydration of 2-phosphoglycerate.
The movement of actin and myosin fibers in a muscle contraction contains all of the following steps EXCEPT
A. the myosin head attaches to the actin filament. B. the globular myosin head detaches from the actin filament. C. myosin rolls up from one end, forming a ball. D. the myosin head returns to its original conformation. E. the myosin filament advances relative to the actin filament.
What is an innate behavior that results in movement toward or away from a stimulus?
a. reflex b. kinesis c. habituation d. taxis
The field of immunology studies the immune response to various factors. What is the name of an inappropriate immune response?
A) sneezing B) autoimmunity C) fever D) infection