A biology student wanted to determine if using fertilizer would promote plant growth. One hundred plants were randomly assigned to one of two groups: one that used the fertilizer, and one that did not use a fertilizer. Each plant was planted in the same amount of
soil and given the same amount of water and light.
Which of the following describes the benefit of using control in this experiment?
By controlling the amount of soil, water, and light in the experiment, we eliminate the need to have a control group.
By controlling the amount of soil, water, and light that may influence the response variable, we reduce variability in the
response variable.
By controlling the amount of soil, water, and light that may influence the response variable, we eliminate variability in the
response variable.
By controlling the amount of soil, water, and light, the differences observed in the response variable can be attributed to those
variables that were controlled.

b is dominant over the allele for the white fur.

not only is it colder, it also becomes darker, less salty, and more dense.

50% lit on the left side

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.