In a oak hickory forest in Pennsylvania, gray squirrel populations have been declining due to increased predation by hawks and other predators. At the same time, researchers have discovered that the average thickness of acorns in the forest have decreased by 15% due to lower feeding pressure from squirrels. What type of natural selection would this be an example of?
directional T/F

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

Mrna decodes information from the original dna master plan to build proteins in the during the process of ribosomes.

Which of the following was a characteristic of a dromaeosaur? modified front claw grasping with their forelimbs both a and b none of the above