A method used to link genetic markers with specific genes on chromosomes is called ____________________
Fill in the blank(s) with correct word
positional cloning
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The waxy polymer on the leaves of vascular plants that protects them from pathogens is called
A. lignin. B. cutin. C. chitin. D. cellulose. E. sporopollenin.
What would be most likely to occur if one of a man's testicles failed to descend (drop into the scrotum)?
A. The pH of his semen would be higher than normal. B. Gonadotropins within the undescended testicle would be inactivated. C. He would have a lower than normal sperm count. D. He would be unable to undergo spermatogenesis. E. He would have exaggerated secondary sex characteristics.
How do sensory cells communicate different types of information to the brain-touch versus light for example?
A. by firing action potentials of varying amplitudes in the same neuron B. by using different kinds of receptor potentials in the same neuron C. by using different kinds of electrical signals in the same neuron as the information is conveyed to the brain D. by using different neurons for different stimuli (e.g., light and touch) E. by firing action potentials at different frequencies in the same neuron
Which of these reasons for cell division goes beyond the normal requirements for it?
A) To make new immune cells when the organism is sick B) To replace old cells C) To make extra copies of DNA to store for later use D) To make new cells as the organism grows E) To repair damaged tissue