How is it that the heartworm is able to multiply in numbers at such a fast rate?

Does geographic distance between salamander populations increase their reproductive isolation? To answer this question, researchers studied populations of the dusky salamander (Desmognathus ochrophaeus) living on different mountain ranges in the

In an energy pyramid, the amount of energy at the producer level is 475,650 kilocalories. The pyramid has four trophic levels, including the producer level.

Prior to modern DNA analysis, morphology (study of physical characteristics) was used to classify organisms. As a result of DNA analysis, some organisms were found to be misclassified. Why were they misclassified?

Which statement best explains why compounds have different properties then the elements that form them

Location A receives the sun's rays at an angle. Location B receives the sun's rays head on. Which statement is most likely true? Both locations are at the poles. Both locations are at the equator.

Approximately 70-80 percent of cancers in the aging population are the result of

Identify several things that can be seen with a karyotype.

How the carbon cycle might be affected if we increased the extraction rate of fossil fuels.

Ovules and pollen grains take part in what process?

Human activities, such as the burning of fossil fuels, result in air pollution. what could be an outcome if the amount of smoke released is not regulated?