Why is it thought that advances such as agriculture, literacy, and urbanization have not been accompanied by additional increases in brain size?
a. ? the earliest homo sapiens were as intelligent as contemporary humans.
b. ? although brain size has remained constant, brain density has increased.
c. ? more efficient neuronal connections account for modern human advancements.
d. ? the physiological cost of a bigger brain exceeds its benefit?

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

Which statement describe events that occur during interphase?

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.