In __________ speciation, a geographic barrier
interrupts gene flow between populations. Fill in the blank(s) with the appropriate word(s).
Answer: allopatric
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A muscle precursor cell expressing the MyoD1 gene would be considered to be
A. pluripotent. B. determined. C. differentiated. D. totipotent. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about determination and differentiation? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? 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?
he route that most accurately describes secretory protein movement through the endomembrane system would be
A. Golgi apparatus?smooth endoplasmic reticulum ?lysosome?vesicles?plasma membrane B. plasmid?plasma membrane?nuclear envelope?smooth endoplasmic reticulum?vesicles C. nuclear envelope?vesicles?Golgi apparatus?rough endoplasmic reticulum?plasma membrane D. lysosomes?rough endoplasmic reticulum?smooth endoplasmic reticulum?vesicles?plasma membrane E. rough endoplasmic reticulum?vesicles? Golgi apparatus?vesicles ?plasma membrane
When lungs evolved in vertebrates, the evolution of _____ also occurred in the circulation of blood within those vertebrates.
A. a muscular heart B. more plasma C. a lymphatic system D. red blood cells E. double circulation
Botulinum toxin- A toxin produced by the bacterium Clostridium botulinum.Known for sometimes lethal poisoning from infected meat products. In modern controlled medical or cosmetic use, the very same toxin is known as Botox.Tetanus toxin- Another very potent neurotoxin produced by Clostridium tetani.Strichnine- A highly poisonous alkaloid produced by the Strychnos nux-vomica tree,historically used to kill rats and other pests.In contrast to these toxins, strychnine acts postsynaptically, to block glycine from binding to receptors on motor neurons. Would you expect the symptoms of strychnine poisoning to be more similar to those of botulinum or tetanus toxin?
A. Tetanus toxin B. Botulinum