Is the potassium and sodium ion concentration in a resting neuron high or low? Explain why
What will be an ideal response?
In a resting cell, the sodium channels are closed, but potassium channels are open, therefore the potassium ion concentration is high within the cell, and the sodium concentration external to the cell is high. This is the resting potential. The outside of the cell is negatively charged when compared to the inside of the neuron.
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a. prezygotic / behavioral b. prezygotic / temporal c. postzygotic / mechanical d. postzygotic / hybrid inviability
What is the sliding clamp in eukaryotic DNA replication is known as?
a. mtRNA b. euDNA c. PCNA d. DNA pol I
From the cross A b c / a B C × a b c / a b c, how many double crossovers would be expected out of 1000 progeny?
The map of a chromosome interval is: A——10 m.u.——B——40 m.u.——C A) 5 B) 10 C) 20 D) 40 E) 80
Four of the five answers are ways by which animals remove water and/or unwanted solutes. Select the exception
a. excretion in urine b. secretions c. exhalation d. elimination in feces e. bleeding