=== Kallar Grass Experiment ===
Kallar grass (a salt-tolerant grass) was planted in a soil having a high salt content. As the roots of the grass grow and release CO2, the soil pH decreases. Ions, such as calcium (Ca2+), from dissolved salts may then be more readily leached (carried downward by water) out of the upper soil layers. Figure 1 and Table 1 show the electrical conductivity (a measure of the number of dissolved ions in the soil that is directly proportional to salt content) and the soil Ca2+ concentration, respectively, for each of 3 soil depths at 5 different times after planting.
=== Rainfall Intensity and Velocity ===
hor-down d velocity is consistent with Student 3’s conclusions? izontal component, v (or v ). Both components are west w constant, and v is parallel to the path.
=== Biodiesel Production ===
Biodiesel is a fuel that is produced when oil from plant sources reacts with ethanol in the presence of a catalyst.
=== Codons and mRNA ===
An mRNA strand contains nucleotides that determine the sequence of amino acids in a protein.