While you are riding the ski lift up to the top of the mountain on a very cold day, you start to shiver involuntarily. You know that the shivering is your body?s attempt to help regulate your body temperature and is an example of what type of mechanism?
A. energy utilization
B. evolutionary adaptation
C. sensitivity
D. homeostasis
Answer: D
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Imagine you genetically engineered a neuron to produce voltage-gated Na+ and K+ channels that had the same opening times in response to a change in voltage. How would that change the recording above?
A. The peak voltage would be higher. B. The peak would occur over a longer period of time. C. The period of hyperpolarization would be longer. D. No action potential would be generated. E. Threshold values would increase.
What does the data analysis allow you to conclude about linkage between sn and car? (Select all that apply.)
In Drosophila, singed bristles (sn) and carnation eyes (car) are both caused by recessive X-linked alleles. The wild-type alleles (sn+ and car+) are responsible for straight bristles and red eyes, respectively. A sn car female is mated to a sn+car+ male and the F1 progeny are interbred. The F2 are distributed as follows:
A) There is a high probability that the deviations from the expected number of F2 in each genotype class are due to chance.
B) The data do not allow rejection of the null hypothesis.
C) The p value is high meaning that the data is significant.
D) There is good evidence that cn and car are linked.
The base of the food web in the deep sea is:
a. phytoplankton. b. algae. c. seagrasses. d. sinking dead matter. e. viruses.
The primary building block (monomer) of proteins is
A. an amino acid. B. a nucleotide. C. a fatty acid. D. a glucose molecule. E. a group of four interconnected rings.