Which of the following points on the phylogeny shown above depicts the most recent common ancestor of Animals and Microsporidians?
A. 1
B. 2
C. 3
D. 4
E. 5
A
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Which of the following represent repeated sequences commonly found in the human genome? (Choose all that apply)
A. several thousand base pair sequences in tandem B. several thousand base pair sequences dispersed throughout the genome C. two or three base pair sequences repeated many times in a row D. two or three pase pair sequences dispersed throughout the genome
The Y-shaped part of the DNA molecule where the actual replication process occurs is called the replication ________.
A. junction B. fork C. tongue D. splice
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?
Los Angeles, California, has an average daily temperature between 70°F and 80°F for most of the year. There's very little rainfall except during a rainy season beginning in the fall. What does this describe about the city's conditions?
A) climate B) weather C) biome D) ecosystem