Stressful environment leads to unhealthy behaviors such as Ix)or eating habits, which ______ increase the risk of high blood pressure and heart disease.
A.
in turn
B.
by chance
C.
by fortune
D.
in case
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【单选题】The DNA of interphase chromosomes, although about ___ times less condensed than that of mitotic chromosomes, is still packed tightly.
【单选题】The most highly condensed form of interphase chromatin is called heterochromatin. It was first observed in the light microscope in the 1930s as discrete, strongly staining regions within the mass of c...