Which cellular protein is found in desmosomes?
A) tubulin
B) occludins
C) dynein
D) cadherins
E) connexons
Answer: D) cadherins
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A peptide has the sequence NH2-phe-pro-lys-gly-phe-pro-COOH. Which of the following sequences in the coding strand of the DNA could code for this peptide?
A) UUU-CCC-AAA-GGG-UUU-CCC B) AUG-AAA-GGG-TTT-CCC-AAA-GGG C) TTT-CCC-AAA-GGG-TTT-CCC D) GGG-AAA-TTT-AAA-CCC-ACT-GGG E) ACT-TAC-CAT-AAA-CAT-TAC-UGA
True or false: observations allow scientists to draw tentative explanations called hypotheses
A. true B. false
Answer the following statement(s) true (T) or false (F)
1. Treating a plant with a fungicide could interfere with the plant's uptake of nitrogen. 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 about the relationship between plants and fungi? 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? 2. Parasitic fungi will usually attack a plant through stomata on the root surface. 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 about how parasitic fungi interact with 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? 3. Systemic response occurs when plants exhibit generalized defense responses in organs distant from the wound. 4. Using biotechnology, plant breeders attempt to find and incorporate specific resistance genes into plants that lack them. Once a plant has been given a resistance gene, it will have indefinite protection from the associated pathogen. 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 about gene insertion and genetic variation? 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? 5. If a bacterium containing a mutation in the avirulence gene lands on a plant that has the corresponding R gene, the bacterium may not initiate rapid cell death in the plant. 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 about avirulence and R genes? 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?
In a family, both parents have freckles and widow's peak. Both of these traits are dominant: F = freckles, W = widow's peak. What is the correct phenotypic ratio of the next generation if the parents were heterozygous? The order of the genotypes is:
freckled with widow's peak; freckled, straight hairline; no freckles with widow's peak; no freckles, straight hairline. A) 9:1:1:3 B) 9:3:3:1 C) 9:3:1:1 D) 1:3:3:9