Years would be the independent variable because any sort of time is usually the independent variable.
A. xx
b.x+x+
c.x0x0
d.x+x0
e. x0y
They were legally bound to the land by contract and debt. The land owners paid for the serfs to come over from a different country. The serfs then were legally bound to the land until their debt was paid off.
Hope this helps! xx
Answer:
C. Regulating Gene Expression
Explanation:
That would be my choice because a signaling molecule is hormones
Answer is D. Notochord, gill slits, dorsal nerve cord.
