1 A population of lizards has variation in its leg length. Some have short legs, most have medium length legs, and some have long legs. Longer legs allow the lizard to run faster and have more success at escaping predators. Over several generations the population of lizards now has longer legs compared to their ancestors. Which scientific idea would best explain this change?

(drag each tile to the correct identify which questions can be answered by what can be answered by science or which cannot. -is it right or wrong to use genetic engineering to produce new food products? -what are the most common social settings that tend to produce accomplished artists? -if a new gene is added to the genome of a tomato species, will that species be more resistant to insects? -should humans use biotechnology to bring extinct organisms from the fossil record back to life? -do the types of organisms found in the fossil record appear in consistent sequences in different parts of the world? -are michelangelo's paintings more impressive than rembrandt's?

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

If the coding part of an mrna molecule is 1800 nucleotides (bases) in length, this molecule will contain codons and code for a polypeptide that is amino acids long.