__________ are jawless fishes with a backbone. Fill in the blank(s) with the appropriate word(s)
ANSWER: Lampreys
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Four of the five answers listed below are protistan structures. Select the exception
a. cell membrane b. pili c. mitochondrion d. eyespot e. pellicle
As a researcher, you are charged with determining the side effects of a new drug. From previous
observations, you suspect that this drug reduces the rate of DNA production (replication) within skin cells of patients using the drug. With the following materials, design an experiment that would answer your questions about the effect of the drug on DNA production. You know that: DNA contains phosphate groups. You have: radioactive isotopes of phosphate (32P), skin cell cultures from various patients, the drug in question, and a device that measures radioactivity. What will be an ideal response?
What would you predict about the presence of Hox genes in the last common ancestor of vertebrates and invertebrates? (Select all that apply)
A. The genes specified anterior-posterior development. B. If mutated, there would be an extra pair of wings and legs growing from the head. C. The genes contained a MADS-box. D. That ancient ancestor was too primitive to have Hox genes. E. The genes were in four clusters. F. The genes were in anterior-posterior order on the chromosome. G. The genes contained homeoboxes.
In which part of the chloroplasts are the Calvin cycle enzymes located?
A. envelope B. grana C. cristae D. stroma E. thylakoids