Which of the following scenarios represents the best use of a scientific model?
a.
predicting weather patterns
b.
studying the result of mixing two chemicals
c.
studying the effect of oil spills on plant growth
d.
studying the speed of a ball down an inclined plane

Please select the best answer from the choices provided

A
B
C
D

How is an environment able to support different varieties of organisms?

The trp operon in e.coli regulates genes that code for enzymes required for synthesis of the repressible operon. when tryptophan is not available amino acid tryptophan. the trp operon is a in the environment, the trp repressor protein activeinactiveregulated. therefore, rna polymerase can bind to the genes to begin transcription.

What are the formed elements (cell or parts of cell) in blood and what are their functions ?