Topsoil .
a) is devoid of charged particles
b) is a mixture of rock fragments, living organisms, and humus
c) is uniform in texture
d) is the relatively inert upper layer of soil
e) does not retain water

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes

Which of these correctly describes the difference between processes that take place in prokaryotic and eukaryotic cells?