If a stimulus is outside the temperature range of the known thermoreceptors, ____
a. no action potential is generated
b. a continuous action potential is generated
c. the action potential has the highest frequency possible
d. the neural signal is perceived as pain
e. the neural signal is the same as its closest receptor
ANSWER: d
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The genes encoding luciferase, green fluorescent protein (GFP), and ?-galactosidase are typically used in cloning as
A) transcription regulators. B) global control genes. C) promoter sequences. D) reporter genes.
Besides sending messages to and from the brain, the spinal cord has another important function: Reflexes. In fact, in very simple animals, that is the main function of the cord. In higher animals, reflexes are important because they provide
_____ protection from sudden or unexpected environmental harms. _____ stimulation of the brain as a protection against atrophy in situations where voluntary movement is hindered, such as a coma. _____ objective physical evidence of neurological injury. _____ maintenance of life-sustaining processes such as breathing and heart beat, even while sleeping or unconscious.
Choose the letter of the best match from the following:A. protodermB. vascular cambiumC. apical meristemD. procambiumE. ground meristemUltimate source of all cells that contribute to growth in length of stem or root.
Fill in the blank(s) with the appropriate word(s).
The cross GE/ge × ge/ge produces the following progeny: GE/ge 404; ge/ge 396; gE/ge 97; Ge/ge 103. From these data, one can conclude that there are ________ map units between the G and E loci
A) 5 B) 10 C) 15 D) 25 E) 20