What causes water molecules to form hydrogen bonds with each other?
What will be an ideal response?
The covalent bond between the H and the O of the water molecule is polar because the electrons spend more time around the O. Thus the H is left with a slight positive charge. The slightly positive H is attracted to the slight negative charges created by the polar covalent bonds of other molecules. This attraction, by definition, is a hydrogen bond.
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Which is the least successful method of birth control?
a. withdrawal method b. a condom c. a diaphragm d. tubal ligation e. oral contraceptives
Genes that tend to be inherited together are said to be:
a. associated. b. related. c. similar. d. linked. e. alleles.
What happens during the follicular phase of the ovarian cycle?
A. Structures in the ovary produce estrogen B. Structures in the ovary produce progesterone C. FSH and LH are present D. Eggs are developing E. One or more eggs has been released and will implant in the uterus if fertilization has occurred
Which parts of a flower are most likely to have distinctive colours, patterning, and shapes for attracting pollinators?
a. the petals b. the receptacles c. the sepals d. the stamens