Which of the following is NOT accurate in
describing a hormone?
a. Hormones produced by a particular species
affect only that species.
b. Only those cells that have specific receptors for
a hormone can respond to it.
c. Hormones in general are produced by one cell
and cause their effects in another cell.
d. Hormones are a type of signaling molecule.
e. Hormones stimulate or inhibit gene activity.
Answer: a
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When you encounter a bear while hiking, which part of your nervous system triggers an increase in your heart rate and
breathing to help you run away?
a. the central nervous system b. the sympathetic nervous system c. the parasympathetic nervous system d. somatic nervous system e. cranial nerves
Flowering plants appeared in the fossil record in the:a
Tertiary period. b. Cenozoic era. c. Paleozoic era. d. Late Cretaceous period. e. Jurassic and Lower Cretaceous periods.
Which of the following conditions is related to an abnormality in the function of red blood cells?
a) arrhythmia b) Anemia c) hypertension d) leukemia
The second generation ratio of a monohybrid cross is
a. 1:1. b. 2:1. c. 9:3:3:1. d. 1:2:1. e. 3:1.