Which best describes a gene? different allele forms of a trait tightly coiled strands of DNA the center of a chromosome a segment of chromosomal DNA.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects

c is the answer to this question. altitude affects the weather because air molecules evaporate.

the answer is d p: cell, q: organ, r: organ system, s: tissue

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.