The fusion of two gametes produces a
A) zygote.
B) schizont.
C) chromatid.
D) centromere.
E) merozoite.
A
Bloom's Taxonomy: Knowledge
Section: General Characteristics of Eukaryotic Organisms
Learning Outcome: 12.1
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Which of the following choices places the steps in plant cell-to-cell communication in the correct order?
a. signal is converted to a form that acts inside the receiving cell cell alters growth, metabolism, or gene expression signaling molecule reversibly binds receptor b. cell alters growth, metabolism, or gene expression signaling molecule reversibly binds receptor signal is converted to a form that acts inside the receiving cell c. none of the choices d. signaling molecule reversibly binds receptor signal is converted to a form that acts inside the receiving cell cell alters growth, metabolism, or gene expression
What does the phrase "eat low on the food chain" mean? Why is this sound advice ecologically?
What will be an ideal response?
A large proportion of archaeans are extremophiles, so called because they inhabit extreme environments with high acidity, salinity, and/or temperature. Such environments are thought to have been much more common on the primitive Earth
Thus, modern extremophiles survive only in places that their ancestors became adapted to long ago. Which of the following is, consequently, a valid statement about modern extremophiles, assuming that their habitats have remained relatively unchanged? A) Among themselves, they should share relatively few ancestral traits, especially those that enabled ancestral forms to adapt to extreme conditions. B) On a phylogenetic tree whose branch lengths are proportional to the amount of genetic change, the branches of the extremophiles should be shorter than the non-extremophilic archaeans. C) They should contain genes that originated in eukaryotes that are the hosts for numerous species of bacteria. D) They should currently be undergoing a high level of horizontal gene transfer with non-extremophilic archaeans.
Which of the following may be a component of bacterial cell walls?
A. carrageenan B. lipoteichoic acids C. mycolic acid D. tubulin E. both lipoteichoic and mycolic acids