Glands that have lost contact with a body surface are called , and secrete their products into capillary rich interstitial spaces for quick distribution throughout the body.

Ricardo notices that when he plays soccer in the rain, his ball does not seem to go as far after a kick. what is the best scientific question that ricardo could ask about this observation? is soccer better played in the rain or sun? how does rain affect the distance a soccer ball can travel? how does rain affect the speed of a soccer ball? is soccer affected by the rain?

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

What tool do geneticists use to predict the outcome of genetic crosses? a.karyotype b.punnett square c.centrifuge