The graph above was made by a south american biologist in the country of brazil, after a long study on parrots. about 200 years ago, 90% of brazil was covered in mature, deep forest. today, well over half of this forest has been cut to make way for farms. what conclusion could you draw about the parrots in the graph?

B) There are probably less green parrots today than there once were.

C) Blue parrots probably are the best adapted species to live on farms.

D) The blue parrot population has likely increased in the last 200 years.

The answer is B. This is because the graph shows the highest number of green parrots in the 'deep forest' category of environment, whereas the numbers in the 'grassland' and 'scrub forest' are less. Since the forested area in Brazil has decreased rapidly, this means that the preferred environment of the green parrot has decreased, probably resulting in a decline in the green parrot population

 B)  There are probably less green parrots today than there once were.

There are probably less green parrots today than there once were. With a change in environmental conditions, the parrot populations change.

~USATestprep~

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

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.