In two component regulatory systems, the response regulator typically receives a ________ from the sensor kinase when it has been activated.
A. methyl group
B. phosphoryl group
C. acetyl group
D. pyruvate group
Answer: B
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A Venus fly trap’s niche in an ecosystem is as
a ________.
a. producer b. primary consumer c. second-level consumer d. producer and primary consumer e. producer and second-level consumer
Two hundred years ago, the fly species Rhagoletis pomonella only laid its eggs on fruit of the hawthorn tree. Today, different "host races" of R. pomonella lay their eggs on hawthorns OR apples. Apples occur within the range of hawthorns, so divergence between apple flies and hawthorn flies could be the first step in sympatric speciation. Choose the evidence that would suggest that R. pomonella is currently undergoing sympatric speciation. Check all that apply.
_____ Apple flies typically mate with apple flies, and hawthorn flies typically mate with hawthorn flies. _____ Apple flies and hawthorn flies emerge from their hosts at different times of the year. _____ Apple flies and hawthorn flies are able to form fertile hybrids. _____ Apple flies and hawthorn flies are physically indistinguishable from each other. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about sympatric speciation? 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?
Which animal taxon is named for the cuticle or external skeleton that its members secrete and
periodically molt?
a. Deuterostomia b. Ecdysozoa c. Reptilia d. Lophotrochozoa e. Protostomia
Most cells cannot harness heat to perform work because _____
A) heat is not a form of energy B) temperature is usually uniform throughout a cell C) heat can never be used to do work D) heat must remain constant during work