In which type of contraction is a force exerted by the muscle but the muscle does not shorten?

A. isometric
B. isotonic


Answer: A

Biology & Microbiology

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Comparative embryology helped clarify the relationships among major groups of animals. Bilaterians, for example, are (select all that apply)

A. diploblastic B. triploblastic C. coelomate D. acoelomate E. protostomate

Biology & Microbiology

Indicate the scenario(s) that could directly result in sympatric speciation. Check all that apply.  

_____  Two sunflower species cross to form a healthy hybrid individual with equal copies of chromosomes from each parental species. _____  A new river channel divides a population of beetles into two populations. _____  A large fence blocks the intermingling of two populations of a species. _____    A subset of flies within a larger population colonizes a new host plant. 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 and allopatric 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?

Biology & Microbiology

Define long-term potentiation

What will be an ideal response?

Biology & Microbiology

Which arthropod subgroup includes the spiders?

A. Crustaceans B. Insects C. Arachnids D. None of the above include spiders

Biology & Microbiology