1912, Alfred Wegener proposed the idea of continental drift. This idea stated that Earth’s continents were once joined as a single landmass, as shown in the illustration. Wegener believed that over time, this landmass broke into pieces that drifted apart to form the continents as they are known today. Although Wegener had evidence to support his idea, most scientists rejected the idea of continental drift because they could not explain how it occurred. Today, however, the theory of continental drift is widely accepted by scientists. Which of the following explains how the theory of continental drift came to be widely accepted? A. More information was discovered about the rock cycle.
B. The law of superposition was developed.
C. The theory of plate tectonics was developed.
D. The law of uniformitarianism was applied more widely.

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.

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

1. watermelon, papaya, oranges, bananas, and lemons are included in this food group. vitamin c 2. you need 6 or more servings of this food group each day vitamins d and a 3. found in fruit and keeps blood vessels healthy calcium 4. vitamins found in milk bread and grain 5. a mineral that strengthens bones fruit