Why have legumes been planted as a cover crop to improve the soil fertility of a field?
A) Legumes have nitrogen-fixing bacteria in their root nodules.
B) The leaves of legumes absorb more nitrogen than other plants.
C) Legumes have carbon-fixing bacteria in their root nodules.
D) Legumes aid organic decomposition.
E) Legumes need about 100 times less nitrogen than other plants.
Answer: A
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In which of the following forms of reproduction does an unfertilized egg develop into a new individual?
A. parthenogenesis B. budding C. fragmentation D. conjugation E. binary fission
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?
Transcriptionally active genes show lower levels of DNA methylation compared with transcriptionally inactive genes
Indicate whether the statement is true or false
The valence of an atom represents its
A. ability to interact with other atoms. B. electronegativity. C. atomic mass. D. ability to attract electrons. E. isotopic state.