The ____ horizon is the most fertile soil layer where the roots of most herbaceous plants are located?
a. A
b. B
c. C
d. D
e. O
ANSWER: a
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Which list correctly describes the sequence of events that occurs during cell division, beginning at interphase?
a. nuclear division, DNA replication, cytoplasmic division b. DNA replication, cytoplasmic division, nuclear division c. cytoplasmic division, nuclear division, DNA replication d. nuclear division, cytoplasmic division, DNA replication e. DNA replication, nuclear division, cytoplasmic division
The assembly of general transcription factors at a eukaryotic promoter typically begins at what site?
A. the TFIID sequence B. the TATA box C. the sigma site D. the start codon
Darwin believed that acquired characteristics are passed onto progeny
A. true B. false
In the plant life cycle, what process takes place
between the formation of gametes and the formation of the zygote?
a. mitosis b. meiosis c. fertilization d. more than one of these e. none of these