Which of the following objects would best be used to understand how the human heart works?
A.
coffee filter
B.
block of wood
C.
plastic bag
D.
water pump

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.