Earthworms live and reproduce within the soil. They aerate the soil (add air) and add organic material to it. Other organisms perform similar functions in other environments, but earthworms are good at aerating and adding organic matter to soil. Together these statements best describe an earthworm’s:

A. environment

B. habitat

C. nutrition

D. niche

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins

After a recent rainy season, a number of the communities in a western state suffered flooding and mudslides. a study commissioned by the state legislature determined that the extensive removal of a certain plant from hillsides within the state contributed significantly to the flooding and mudslides. the plant had an extensive root system that hold hillside soil in place, and it was being rapidly removed because its roots had recently gained national favor as a powerful herbal remedy. as a result, the legislature passed a statute prohibiting the removal of more than 50% of such plants from any hillside within the state. a landowner within the state challenged the statute under the takings clause of the fifth amendment, alleging that he had regularly harvested substantially more than 50% of the plants from his property and needed to do the same this year to meet the demand for the root. is he likely to prevail in his challenge?

An original dna strand has the following base sequence taggtaact what base sequence would be produced through dna replication