The practice of plowing fields along the curves of a slope is called a. drought plowing. b. contour plowing. c. no-till plowing. d. sod plowing.

What molecule, produced in cellular respiration, is used to open and close ion channels? A. ADP B. high energy electrons C. adenosine triphosphate

Plants have male and female gametes (sperm and ovaries) and can reproduce sexually. a. True b. False

Why is a system's work output limited? a. Entropy decreases with each stage of a system, causing a decrease in available entropy to carry out each stage. b.

Which of the following cell organelles do both prokaryotic and eukaryotic cells have? A. Golgi apparatus B. ribosomes C. mitochondria

To what class f compounds does ammonia belong to

The spinous process extends posteriorly from the union of the

Does a wind mill use nonrenewable energy

What behavioral shift reduced wood consumption during the Tokugawa shogunate? using coal for fuel building houses with bigger central hearths eating less rice and seafood increased grazing of oxen and cattle

When working muscle cells are deprived of oxygen they produce?

RNA interference (RNAi) is a mechanism of gene regulation in eukaryotes. RNAi is? initiated by?, which leads to the of specific genes.