Which of the following statements regarding the definition of species is false?
A) The ecological species concept identifies species in terms of their ecological niches.
B) The phylogenetic species concept defines a species as a set of organisms that shares a common ancestor and forms one branch on the tree of life.
C) The morphological species concept relies upon comparing the DNA sequences of organisms.
D) Under the biological species concept, the gap between species is maintained by reproductive isolation.
Answer: C
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A patient suffers from a disease that slows fatty acid synthesis. What is a likely impact of this disease on nervous system function?
A. improved functioning due to a healthier weight B. insufficient myelination and slow axon conduction rate C. improved functioning due to better blood flow D. weaker action potentials with smaller depolarization Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content/Choose Answer · What do you already know about fatty acids? What other information is related to the question? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
How does the digestion and absorption of fat differ from that of carbohydrates?
A. Processing of fat does not require any digestive enzymes, whereas the processing of carbohydrates does. B. Fat absorption occurs in the stomach, whereas carbohydrates are absorbed from the small intestine. C. Fat must be partially digested by bacteria in the large intestine before it can be absorbed, which is not the case for carbohydrates. D. Most absorbed fat enters the lymphatic system, whereas carbohydrates directly enter the blood. E. Carbohydrates need to be emulsified before they can be digested, whereas fats do not.
What is required for formation of the transcription initiation complex in eukaryotes?
A. binding of a transcription factor to the TATA box, followed by recruitment of additional transcription factors and recruitment of RNA polymerase II B. binding of the sigma subunit to the start site followed by recruitment of RNA polymerase II C. binding of RNA polymerase II to the TATA box, followed by recruitment of transcription factors D. binding of the sigma subunit to promoter elements at -35 and -10, followed by recruitment of the core polymerase E. binding of a transcription factor to the transcription bubble, followed by recruitment of additional transcription factors and recruitment of RNA polymerase III
Instead of having synapses between two nerve cells, why not just "wire" the two cells together somehow?
What will be an ideal response?