As agricultural techniques and resulting harvests improved,
a. surplus production was still difficult to achieve.
b. surplus production was at the discretion of the individual farmer.
c. surplus production served as a kind of capital, or wealth that stimulated new kinds of socioeconomic interactions.
d. farmers could stop producing full time and become religious leaders.
e. a social and economic hierarchy emerged in all Neolithic societies.
Question 2
Some researchers argue that human population growth initiated the agricultural response at the end of the last Ice Age; others see it happening the other way around. But there's no question that
a. population size and density both tended to decrease as farming produced smaller and less predictable yields.
b. population size and density both tended to increase as farming produced larger and more predictable yields.
c. population size tended to increase and density decrease as farming produced larger and more predictable yields.
d. population size tended to decrease and density increase as farming produced larger and more predictable yields.
e. population size and density both tended to increase as farming produced larger but less predictable yields.
Experimental evidence of the effect of allelochemicals on plant production.
Primary production is positively correlated with the evapotranspiration rate.
Primary production is constrained by the most limiting factor.
Pair Production and Annihilation
Performing Transmission-Based Precaution: Isolation Techniques
Structures of Voice Production