What is the organism with the longest evolutionary history in this diagram?
a. human
b. pig
c. snake
d. yeast
D
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Imagine that you are studying the control of ?-globin gene expression in immature red blood cells . (Mature red blood cells contain ?-globin protein but lack a nucleus and, therefore, the ?-globin gene.)
If you deleted a sequence of DNA outside the protein-coding region of the ?-globin gene and found that this increased the rate of transcription, the deleted sequence likely functions as _____. A) a promoter B) a promoter-proximal element C) an enhancer D) a silencer E) any of the listed functions
Short-day plants are those that flower only when the night period of a plant is:
A. longer than a defined period B. shorter than 12 hours C. followed by short periods of light interruptions D. less than that in summer E. longer than 12 hours
Describe the path that the blood takes as it travels through the kidney, and the changes that take place in its composition as it moves through each structure of the kidney
What will be an ideal response?
During a discussion about ecosystems, a student says, "Plants eat sunlight, and animals eat other organisms." Which response to the student's comment is most accurate?
A) Plants don't eat sunlight; they eat sugars that they get from the soil. B) Plants don't eat sunlight; they use sunlight to make sugars. C) Plants eat sunlight, but they also eat other organism such as decomposers. D) Plants eat sunlight, but animals also eat bacteria, which are not considered organisms.