If you examine the soil profile revealed by a fresh road cut, which feature will you probably find in the B horizon?
A) an abundance of worms and burrowing insects
B) an abundance of decomposing organic material
C) an abundance of fine clay but not much organic material
D) a predominance of slightly weathered rock and gravel
Answer: C
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In a normal Drosophila embryo, a gap gene called Krüppel is expressed in the anterior end because it is activated by Hunchback protein, and this region contains a high level of Hunchback
A. true B. false
The genetic variability of a population is solely dependent on the generation of mutations
a. True b. False Indicate whether the statement is true or false
Nonprotein catalysts are known as ________
Fill in the blank with correct word.
Molecules capable of absorbing lots of light are ________.
Fill in the blank(s) with the appropriate word(s).