Jose is observing cells under a microscope. If he saw a cell going through anaphase, what would he observe?
A) DNA and protein condensing into chromosomes
B) the sister chromatids moving to opposite poles of the cell
C) chromosomes lining up in the center of the cell
D) nuclear membranes start to form and two daughter cells become distinguishable
Ans: B) the sister chromatids moving to opposite poles of the cell
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A plant sustains pathogen-induced damage to one of its cell walls. A gene-for-gene response soon follows and the tissue surrounding the injury soon dies. Which signaling molecules facilitated this response?
A. Oligosaccharins B. Ethylene C. Gibberellins D. Auxins E. Abscisic acid Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about injury response in plants? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? 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?
What type of bond contributes to a protein's secondary structure?
a. peptide bonds b. covalent bonds c. ionic bonds d. hydrogen bonds e. protein bonds
This illustration shows the mechanism of
a. simple diffusion. b. bulk flow. c. endocytosis. d. facilitated diffusion. e. an active transporter.
Y. pestis is transmitted by___
A. Fleas only B. Fleas and rodents C. Fleas and respiratory droplet D. Rodents, fleas and respiratory droplet E. Rodent fleas