What do sharks have in common with goldfish?
A) Opercula
B) A lateral line system
C) Electrosensors
D) A cartilaginous skeleton
B
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Hox genes are a family of transcription factors that regulate development throughout the animal kingdom. Studies of Hox genes in mice and Drosophila showed that many Hox genes are conserved between both species, and several Hox genes duplicated into new genes with novel functions within mice. Some Hox genes have even lost all function. Hox genes provide an example of which of the following? Check all that apply.
_____ orthologs _____ paralogs _____ heterologues _____ pseudogenes 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 homology? 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?
Most epidermal cells are ___
a. melanocytes b. keratinocytes c. collagenocytes d. neuroglia e. striated
Which of the following structures are able to spontaneous generate an action potential?
A. the sinoatrial node (SA Node) B. the atrioventricular node (AV Node) C. the atrioventricular bundle D. the right and left bundle branches E. All of the items can spontaneously generate an action potential.
What is the main difference between plant defense mechanisms that use secondary chemical metabolites versus plant defense mechanisms that use a systemic response?
A. The metabolites can only help in defense against insects, not against other plants. B. The metabolites are toxic to the plants that produce them, the systemic response is safer. C. The metabolites are not as lethal as the systemic response. D. The metabolites are present at all times, and the systemic response must be induced. E. The metabolites are a more reliable way to kill the invader.