How does auxin affect cell elongation in coleoptiles?
What will be an ideal response?
Ans: This is related to the acid growth hypothesis. The hypothesis states that auxin induces pH changes in the apoplast which subsequently causes cell wall loosening, and that in turn allows the cell to elongate in response to increased internal cell pressure.
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A genetic cross was performed with two pea plants having green, wrinkled seeds. Of the resulting offspring, 75% had green, wrinkled seeds and 25% had green, smooth seeds. With regard to wrinkled versus smooth seeds, the parents must have been ________.
Fill in the blank(s) with the appropriate word(s).
patient with melanoma receives three types of therapy: surgery, radiation, and interferon. Which of these represents something the immune system uses against cancer as well?
A. Radiation -- a class of lymphocytes uses powerful electromagnetic radiation to attack "altered self" cells. B. Interferon -- TH cells and NK cells secrete interferon in response to tumor cells. C. Interferon -- NK cells insert interferon into the membranes of tumor cells, creating large pores that burst the cells. D. Interferon -- In complexes bound with MHC proteins, the interferons indicate the presence of altered tissue to B cells. 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 the actions of the immune system? 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?
Humans must work together to create a sustainable world. What can you do to contribute to this cause?
What will be an ideal response?
Consider the pedigree below. The trait seen in the black-shaded individuals most likely is a _______ trait.
A: Dominant, autosomal B: Dominant, X-linked C: Dominant, Y-linked D: Recessive, X-linked