1. A force is * a. a push or a pull
b. only a pull
O c. only a push
O d. none of the above are corect

The body is protected against harmful flu viruses by

Which of these resources is used worldwide to make construction products, pottery, and porcelain

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis.b. the primary role of microbes on the planet involves causing disease in animals and humans.c. microbes produce vitamins in the intestines.d. microbes play a role in breaking down waste and decomposing dead organisms.