Which statements about the formation of the solar system are true and in a correct order? a. a spinning cloud of dust began to compress; most of the gas and dust contracted into a central mass—the sun; small planetary objects formed. b. a spinning cloud of dust began to compress to form the sun; comets crashed into the sun to form the planets; gravitational force caused thin atmospheres in the outer planets. c. a black hole collapsed to form the sun; comets crashed into the sun to form the planets; gravitational force held the planets in orbit around the sun. d. a spinning cloud of dust began to compress to form the sun; half the mass of the cloud condensed to form jupiter; gravitational force caused the outer planets to have thin atmospheres.

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.

Based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers