The nervous system is the body’s switchboard, sending signals between different parts of the body. the central hub of the nervous system is the brain. the brain is an example of which level of hieratical organization within the body?

a cell
b tissue
c organ
d organsystem

Describe speciation of the galapagos island finches in terms of geographic isolation

Which of the following is the sl unit used to measure temperature a. kilogram b. liter c. meter d. kelvin

1. mendel observed that pea plants had traits, such as color, that were either “one or the other,” never something in between. discuss the correlation between mendel’s factors, what they might be, and why pea plant traits come in one form or another—e. g., gray or dark red—rather than blended.