Which of the following is a function performed by potassium in plants?
a. synthesizing nucleic acids and phospholipids
b. converting light into chemical energy in photosynthesis
c. regulating the opening and closing of stomata
d. regulating nutrient transportation
c. regulating the opening and closing of stomata
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The observation that atmospheric CO2 levels were typically low during glacial periods in Earth's history is an example of _________________
A. causation B. correlation C. communication
Which is the first antibody secreted during immune responses and the first one produced by newborns?
a. IgA b. IgD c. IgE d. IgG e. IgM
In a cross involving incomplete dominance _____
A. the dominant phenotype is expressed in the F1 B. the recessive phenotype is expressed in the F1 C. Mendelian inheritance does not apply D. the phenotypic ratio and genotypic ratio in the F2 are identical E. heterozygotes have a phenotype like one of the parents
Coniferous forests are important ecosystems, particularly in higher latitudes and altitudes. How are conifers of direct
economic importance to humans? What will be an ideal response?