A(n) ________ gene is a gene that encodes a protein that is easy to detect and assay
A) encoder
B) translational
C) reporter
D) recorder
Answer: C
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Which of the following statements are true of xylem?
_____ It is found in all land plants. _____ It assists in conducting materials, such as water and minerals, throughout the plant. _____ It provides structural support to the plant. _____ It is found in the gametophyte generation, but not in the sporophyte. _____ It contains specialized cells known as tracheids.
The least inclusive of the taxonomic categories listed
here is a. family. b. phylum. c. class. d. order. e. genus.
Nerve cells have long thin extensions of their cell membrane called axons. The cell has to get mitochondria from the body of the cell all the way down to the end of the axon to provide energy for nerve signal transmission. What structure in a nerve cell
would be involved in moving the mitochondria, and how would it work? What will be an ideal response?
Explain why a scientist would need to increase the dilution rate in a chemostat from 0.20 hr-1 to 0.50 hr-1.
A. When the dilution rate is low, the availability of an essential nutrient is limited, creating an environment where the organism synthesizes nutrients rapidly to overcome the deficit in the media thus producing toxic waste products. Increasing the dilution rate provides a greater quantity of the nutrient effectively slowing growth and minimizing the level of waste. B. When the dilution rate is low, the total available energy provided by the media exceeds the maintenance energy required by the culture. Increasing the dilution rate flushes out some of the organisms to strike a balance between available energy and maintenance energy. C. When the dilution rate is low, the availability of an essential nutrient is limited, creating an environment where the organism can expend energy on survival only, not growth and reproduction. Increasing the dilution rate enables an increase in cell density. D. When the dilution rate is low, cell reproduction is high, creating a space limitation for the rapidly-dividing organisms. Increasing the dilution rate slows growth to free up available space.