Answer the following question given this paragraph: Lymphatic vessels make up a body-wide circulatory system. The fluid they circulate is lymph. Lymph is a fluid that leaks out of capillaries into spaces between cells. As the lymph accumulates between cells, it diffuses into tiny lymphatic vessels. The lymph then moves through the lymphatic system from smaller to larger vessels. It finally drains back into the bloodstream in the chest. As lymph passes through the lymphatic vessels, pathogens are filtered out at small structures called lymph nodes (see Figure above ). The filtered pathogens are destroyed by lymphocytes. Q: What destroys the filtered pathogens? Choices: - parasites - neutrophils - antibodies - lymphocytes A:
lymphocytes
Answer the following question given this paragraph: the nucleus. The nucleus contains one or more nucleoli, which serve as sites for ribosome synthesis. The nucleus houses the genetic material of the cell: DNA. DNA is normally found as a loosely contained structure called chromatin within the nucleus, where it is wound up and associated with a variety of histone proteins. When a cell is about to divide, the chromatin coils tightly and condenses to form chromosomes. There is a pool of cells constantly dividing within your body. The result is billions of new cells being created each day. Before any cell is ready to divide, it must replicate its DNA so that each new daughter cell will receive an exact copy of the organism's genome. A variety of enzymes are enlisted during DNA replication. These enzymes unwind the DNA molecule, separate the two strands, and assist with the building of complementary strands along each parent strand. The original DNA strands serve as templates from which the nucleotide sequence of the new strands are determined and synthesized. When replication is completed, two identical DNA molecules exist. Each one contains one original strand and one newly synthesized complementary strand. Q: Dna is normally found within what region of a cell? Choices: - genome sequence - mitochondria - Golgi apparatus - nucleus A:
nucleus
Q: Answer the following question given this paragraph: Magma that cools underground forms intrusions ( Figure below ). Intrusions become land formations if they are exposed at the surface by erosion. Q: What does magma that cools underground form? Choices: - chambers - new crust - fluctuations - instrusions A:
A: instrusions
Question: Answer the following question given this paragraph: Chemists need to be concerned with the rates at which chemical reactions occur. Rate is another word for speed. If a sprinter takes 11.0 s to run a 100 m dash, his rate or speed is given by the distance traveled divided by the time. Q: Distance traveled divided by time yields what measurement, which is another word used to describe the speed of a chemical reaction? Choices: - flow - displacement - acceleration - rate A:
Answer: rate
*Question*
Answer the following question given this paragraph: in a one-liter container (Figure 22.15). In this case, the force exerted by the movement of the gas molecules against the walls of the two-liter container is lower than the force exerted by the gas molecules in the one-liter container. Therefore, the pressure is lower in the two-liter container and higher in the one-liter container. At a constant temperature, changing the volume occupied by the gas changes the pressure, as does changing the number of gas molecules. Boyle's law describes the relationship between volume and pressure in a gas at a constant temperature. Boyle discovered that the pressure of a gas is inversely proportional to its volume: If volume increases, pressure decreases. Likewise, if volume decreases, pressure increases. Pressure and volume are inversely related (P = k/V). Therefore, the pressure in the one-liter container (one-half the volume of the two-liter container) would be twice the pressure in the two-liter container. Boyle's law is expressed by the following formula:. Q: Boyle discovered that what property of a gas is inversely proportional to its volume? Choices: - temperature - amount - mass - pressure A:
**Answer**
pressure
Q: Answer the following question given this paragraph: Scientists use the geologic time scale to illustrate the order in which events on Earth have happened. Q: Scientists use what scale to illustrate the order in which events on earth have happened? Choices: - ecological succession - fossil record - cataclysmic time scale - geologic time scale A:
A: geologic time scale