A single-celled eukaryotic organism that does not decompose or eat other organisms is most likely a member of __________.
Answer: Protista
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If an action potential persists for one minute or longer, an increase in the strength of synaptic
connections develops. Which of the following describes the resulting establishment of memory between two neurons?
a. lateralization b. consciousness potentiation c. long-term potentiation d. long-term association e. cephalization association
Chlorophyll molecules are attached to thylakoid membranes by:
a. a long hydrocarbon tail. b. the porphyrin ring. c. the methyl group. d. a magnesium ion. e. a hydroxide group.
All of the following statements concerning nitrogen fixation are true EXCEPT which one?
A. The amount of carbon that is taken up by plants and microbes can be dictated by how much nitrogen is available to support growth. B. Nitrogen fixing microbes convert N2 to ammonia. C. The products of nitrogen fixation are incorporated into amino acids and nucleic acids. D. Nitrogen fixation does not affect the rate of carbon flux.
How does fungal mitosis differ from animal mitosis?
A. The spindle apparatus is unique to fungal mitosis. B. The nuclear envelope remains intact in fungal mitosis. C. Fungi only undergo meiosis; true mitosis is only found in animals. D. Cytokinesis only occurs in fungal mitosis.