Actin bundles give shape and support to the ________ found in cells of the small intestine.
A) centrosomes
B) microtubules
C) microvilli
D) nuclei
E) lamellipodia
C) microvilli
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The surface receptors on B and T cells both
A. play the same role in each type of cell. B. bind to free antigen. C. have two binding sites for antigen. D. have variable and constant regions. E. play the same role in each type of cell AND have two binding sites for antigen.
The major function of a receptor is to _____
a. control the autonomic functions of the body b. stabilize the internal environment to achieve homeostasis c. produce responses to the various stimuli the body receives d. give organisms or cells awareness of and sensitivity to their environment e. control the visceral functions of the body
Although the function of the flexible outer sheath in which the axial filaments of spirochetes lay is unknown, it is nonetheless essential (i.e., the bacteria will not survive if it is removed).
Answer the following statement true (T) or false (F)
Why is the cassava plant difficult to engineer without the help of modern biotechnology?
A) The plant has a very low mutation rate. B) The plant is long lived making selective breeding ineffective. C) The plant is integral to African agriculture and is already optimized. D) The plant does not undergo recombination events, which limits genetic drift.