Lukefahr also showed in 1957 that the pink bollworm enters diapause in response to the shortened day lengths of early fall.
42.
Moreover, hemoglobin carries nitric oxide, a neurotransmitter that could carry information about day length to the master clock in the brain.
43.
Many flowering plants use the pigment phytochrome to sense seasonal changes in day length, which they take as signals to flower.
44.
Artificial light can be used to change the apparent day length and indicate different seasonal features so as to delay spawning.
45.
These indices attempt to account for day length and solar, frost, and drought variability that can be found in different locations.
46.
The days in Biloxi never get longer than 14 hours, and Sweet Spanish onions need day lengths of 15 hours to bulb.
47.
During the summer solstice, day length values range from 17 hours at its southern limits to 24 hours above the Arctic Circle.
48.
The prevalence of shyness in some children can be linked to day length during pregnancy, particularly during the midpoint of prenatal development.
49.
:Day length explains how surise and sunset vary by latitude and where the earth is in its annual orbit around the sun.
50.
Besides, many scientists assumed that people, being nonseasonal, year-round breeders and nonmigratory, were relatively immune to the effects of changing day length.
