D. scientists can easily tell which variable caused the results.
Good luck!
Answer: Natural selection
Explanation: Organisms with more advantageous allele are more likely to survive and pass on these alleles to their viable offspring
Gills. Gills greatly increase the surface area for gas exchange. ... Gills are very efficient at removing oxygen from water: there is only 1/20 the amount of oxygen present in water as in the same volume of air. Water flows over gills in one direction while blood flows in the opposite direction through gill capillaries.
If one species in the food web ceases to exist, one or more members in the rest of the chain could cease to exist too. A plant or animal doesn't even have to become extinct to affect one of its predators. ...
Answer:
The total blood given is 5.5 liters
Thus, total alcohol needed for BAC (blood alcohol content) to exceed 0.1 gram per 100 ml will be 0.1/100 × 5500 = 5.5 grams alcohol.
1 oz = 28.3 grams
28.3 gram water = 28.3 ml
It has 20 percent alcohol by volume,
Therefore, alcohol in one drink will be:
20/100 × 28.3
= 5.66 ml
= 5.66 × 0.79 (density of ethanol)
= 4.47 gram
Thus, no of drinks will be 5.5 g / 4.47 g = 1.2
Hence, 1.2 drinks will make the BAC to exceed 0.1 g / 100 ml in the blood.
