A photosensitive red spot that permits photosynthetic euglenoids to detect the presence of light is called a ______ .
A) pellicle
B) stigma
C) phycobilin
D) diatom
B) stigma
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The Asian kudzu bug (Megacopta cribaria) arrived in Atlanta in 2009 and is quickly spreading across the South. In addition to eating kudzu, it also eats soybeans and can decimate entire crops. The kudzu bug is a type of ________ species.
A. control B. keystone C. invasive D. umbrella
Which of the following is NOT a reason respiration in water is challenging?
A. Water is very dense relative to air. B. Water holds relatively little oxygen compared to air. C. Water moving over thin respiratory epithelial surfaces can create osmotic challenges. D. Dessication of respiratory surfaces is a significant problem. E. All the choices except "dessication of respiratory surfaces" are correct.
Which muscle contraction is involuntary?
A. Cardiac and smooth B. Skeletal only C. Cardiac, smooth, and skeletal D. Smooth only E. Cardiac only
Imagine a newly discovered biological molecule that is mostly hydrophobic in its structure. How would this new molecule be classified?
A) carbohydrate B) lipid C) nucleic acid D) protein