Which of these choices is the definition of allele? :) A: the form of a gene that is expressed
B: one of the alternative forms of a gene
C: the combination of genes for a specific trait
D: the complete genetic makeup of a living thing

What gases are carried by the blood

9. technology can bring both good and bad things. building a vertical farm can increase food supplies in cities (good), but it may cause unemployment in rural areas (bad). give another example of both the good and bad sides of a technological advancement (5 noints)

Why do mountaineers become breathless as they reach high altitudes