Maintaining a steady-state internal environment, despite a changing external environment, is called ________
A) heterostasis
B) biofeedback
C) homeostasis
D) bioregulation
C
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Where are proteins produced other than on ribosomes free in the cytosol or ribosomes attached to the ER?
A) in the extracellular matrix B) in the Golgi apparatus C) in lysosomes D) in mitochondria E) in the nucleolus
You are a landscape architect working on the grounds of a large estate. After you plant a dozen trees, the owner says, "There's been a mistake. The flowers on some of these willow trees look totally different! I specifically asked for Salix alba. You must have planted two different species." You refer to your tree guide, and read: "Salix alba - species of willow native to Europe and Asia, noted for the white undersides of leaves. Insect pollinated, dioecious. Grows 10-30m tall." How do you respond to the client?
A. "Sorry about that sir, I will dig up the wrong trees right away." B. "Don't worry, the trees with the smaller flowers just haven't undergone phase change yet." C. "Don't worry, when the shorter trees reach full size, they will grow the other kind of flower." D. "Don't worry, Salix alba is dioecious, meaning each tree has either male or female flowers. That is why they look different." 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 dioecious species? What other information is related to the question? Choose Answer Given what you now know, what information 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?
Secondary metabolites that function to protect plants from viral, fungal and bacterial pathogens are
a. systemins. b. phytoalexins. c. PR proteins. d. R genes. e. heat-shock proteins.
Choose the phrase that describes MHC class I molecules.
A. Are proteins involved in the complement system B. Found on only some types of white blood cells C. Expressed on all human nucleated cells D. Are secreted from all human nucleated cells