The diffusive movement of an individual atom or molecule is independent of the diffusive movements of any other atom or molecule in the system
a. True
b. False
a
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Chemoheterotrophic bacteria are primary producers
Indicate whether the statement is true or false.
A hummingbird is attracted to the red, tubular flowers of a trumpet vine. It drinks nectar from the flower and, in doing so, collects pollen that it transfers to the next flower
In this form of communication, who is the sender, who is the receiver, and what information is being transferred? A. The hummingbird is the sender, the flower is the receiver, and the availability of pollen is the information. B. The hummingbird is the sender, the flower is the receiver, and the availability of the hummingbird to transfer pollen is the information. C. The flower is the sender, the hummingbird is the receiver, and the availability of nectar is the information. D. The flower is the sender, the hummingbird is the receiver, and the need of the flower to have its pollen transferred is the information. E. The flower is the sender, the pollen is the receiver, and the presence of the hummingbird is the information.
Which of the following is important to the development of dorsal structures such as the neural tube and notochord?
A. Spemann's organizer B. noggin C. cadherins D. both Spemann's organizer and noggin E. both Spemann's organizer and cadherins
Which of the following enzymes is responsible for specifically transcribing tRNA in eukaryotic cells?
A) RNA polymerase I B) RNA polymerase II C) RNA polymerase III D) primase E) RNase H