A long-day plant will flower if
a) it is kept in continuous far-red light.
b) the duration of continuous light exceeds a critical length.
c) the duration of continuous darkness exceeds a critical length.
d) the duration of continuous darkness is less than a critical length.
e) the duration of continuous light is less than a critical length.
Ans: d) the duration of continuous darkness is less than a critical length.
You might also like to view...
An organic compound differs from an inorganic compound in that an organic compound:a
contains carbon. b. contains two or more atoms. c. lacks valence electrons. d. lacks isotopes. e. is basic rather than acidic.
In eukaryotes, DNA replication begins at a single origin of replication on each chromosome
Indicate whether the statement is true or false
When the genome of a particular species is said to include 20,000 protein-coding regions, what does this imply?
A. Any other regions are "junk" DNA. B. There are also genes for RNAs other than mRNA. C. Each gene codes for one protein. D. The species is highly evolved. E. There are 20,000 genes.
Aerobic training ____.
A. makes skeletal muscles more resistant to fatigue B. promotes break down of actin and myosin C. is fueled mostly by creatine phosphate D. produces muscle fibers that fatigue quickly E. makes skeletal muscles become rigid and stiff