Which of these is the human body's first line of defense against invading pathogens such as bacteria and viruses? a) body temperature b) macrophages c) skin cells d) vitamins

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone

Asample of soil from a c horizon is light brown in color and has a high content of a mineral called feldspar. which of the following statements is most likely true

Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error? the object is an asteroid, not a dwarf planet.the object is a moon, not a dwarf planet.the object is not a dwarf planet because it travels with other objects.the object is not a dwarf planet because it is round.