The following are characteristics of a water molecule.
A) The H to O to H angle is approximately 90C.
B) It is held in soils by adhesion but not adsorption.
C) The two H atoms are on diametrically opposite ends of the molecule.
D) It has a positive and a negative side.
E) It is attracted to surfaces with negative but not positive charges.
Question 2
Plant roots obtain access to soil water in which of the following ways?
A) Water vapor moves from the wet soil areas to the root surfaces.
B) Roots extend into moist soil area.
C) The roots contract and leave room in the pores for the water to move in.
D) Water flows to the roots by capillarity.
E) both B and D
. Collagen (Mr 300,000) is a rod-shaped molecule, about 3,000 Å
Using a water-based cleaning system helps reduce the hazards from using strong chemicals.
The movement of water vapor molecules exerts vapor pressure on surfaces.
Water breaks (Or Water rupture) "نزول ماء الجنين او ميه الراس"
Hydrogen burns to produce energy and water
Genes are composed of a sequence of nucleotides in a DNA molecule