1. Which is a reason farmers may choose to plant genetically modified crops?
- higher tolerance to insects
- fewer tractors needed
- saves time during harvests
2. What is the transfer of genes or pieces of DNA from one organism to another?
- DNA cloning
- genetic engineering
- cellular stemming
3. What could be a negative impact of planting crops that have been engineered to make their own pesticides?
- could harm beneficial insects
- could be harder to replant
- could grow without stopping

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.

a. suckling by young

b. hypothalamus

c. dopamine

d. trh

e. anterior pituitary

f. mammary glands

g. milk production