Propose an experiment to identify members capable of assimilating monomers of lignin within a microbial community
What will be an ideal response?
Answer: SIP could be used, which would require isotopically labeled lignin monomers to feed a microbial community. Using labeled carbon as an example, the heavy (13C) atoms would be incorporated into members that have assimilated the labeled lignin monomers such that their 13C-DNA could be separated from 12C-DNA lacking the carbon isotope. The DNA could then be studied to identify the individual members involved in this metabolic process.
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Consider the cell cycle of a human cell. During G2, what is the state of the homologous chromosomes?
A. The homologous chromosomes are lined up on the equator of the cell. B. The homologous chromosomes have all been copied through DNA replication and are beginning to condense. C. The homologous chromosomes have been pulled to their respective poles by the spindle apparatus. D. The homologous chromosomes have not been replicated yet. E. The homologous chromosomes are now in the haploid or n condition.
Assuming that indepentent assortment occurs during meiosis, what type(s) of gametes will form in individuals with the following gentoypes?
a. AABB b. AaBB c. Aabb d. AaBb
During active transport, a carrier protein acts as a
What will be an ideal response?
Following their respective breeding seasons, several species of hummingbirds occur at the same locations in North America and several hummingbird flowers bloom simultaneously in these habitats. These flowers seem to have converged to a common morphology and color. Birds are most visually sensitive to the color red. Hummingbird flowers are pollinated by hummingbirds. Which of the following features of these flowers would indicate they have coevolved with hummingbirds? (Check all that apply.)A) Long tubular flowersB) Flowers are colored violet and blueC) Blooming time of the flowers coincides with the arrival of the hummingbirdsD) Flowers produce a high volume of nectar and sugarE) Flowers are low to the ground
What will be an ideal response?