Which hormone is a gas that is soluble in water?
a. auxin
b. abscisic acid
c. ethylene
d. cytokinin
e. gibberellin
c
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Which of the following represents the correct sequence of events for sexual reproduction in most vertebrates?
A) mitosis ? zygote ? meiosis ? gametes ? embryo B) meiosis ? zygote ? mitosis ? gametes ? embryo C) mitosis ? gametes ? meiosis ? zygote ? embryo D) meiosis ? gametes ? mitosis ? zygote ? embryo E) meiosis ? gametes ? zygote ? mitosis ? embryo
The portion of the electromagnetic spectrum between the 21-cm line of neutral hydrogen and the 18-cm line of OH is known as the ____________
Fill in the blank(s) with correct word
Which of the following statements is false?
a. Neurons in the brain can interpret incoming action potentials only in certain ways. b. Optic nerve impulses can only be interpreted as light. c. Some sensory receptors do not convert a stimulus to nerve impulses. d. The stronger the stimulus, the more action potentials are generated. e. A strong stimulus activates many adjacent receptors, thereby increasing the number of action potentials and the level of awareness for the stimulus.
The large number of alveoli in mammalian lungs, the numerous lamellae in fish gills, the papulae of echinoderms, and the extensive tracheal system of insects are all adaptations that optimize what factor in the formula for Fick's law of diffusion?
A. A B. d C. ?p D. D