Q: How do most plants create food?   Read this paragraph and choose the correct option from the provided answers:  Plants are multicellular eukaryotes. They have organelles called chloroplasts and cell walls made of cellulose. Plants also have specialized reproductive organs. Almost all plants make food by photosynthesis. Life as we know it would not be possible without plants.   Choices:  - electrolysis  - atherosclerosis  - glycolysis  - photosynthesis   A:
photosynthesis
Q: Science is a process of knowing about the natural universe through what two actions?   Read this paragraph and choose the correct option from the provided answers:  Science is a process of knowing about the natural universe through observation and experiment.   Choices:  - thinking and guessing  - changes and experimentation  - guessing and observing  - observation and experimentation   A:
observation and experimentation
Q: Q: The phagocytes that are part of the body’s second line of defense attack any of what that they encounter?   Read this paragraph and choose the correct option from the provided answers:  The phagocytes that are part of the body’s second line of defense attack any pathogens they encounter. They provide a general defense. Some white blood cells attack only certain pathogens. They provide a specific defense.   Choices:  - viruses  - vaccines  - parasites  - pathogens   A:
A: pathogens
Question: Q: Dialysis is a treatment for failure of what organs?   Read this paragraph and choose the correct option from the provided answers:  Kidney failure may be treated with dialysis.   Choices:  - lungs  - liver  - spleen  - kidneys   A:
Answer: kidneys
*Question*
Q: What material is transported in a process called longshore drift?   Read this paragraph and choose the correct option from the provided answers:  The transport of sediments by longshore currents is called longshore drift . Longshore drift is created in this way: Sediment is moved up the beach by an incoming wave. The wave approaches at an angle to the shore. Water then moves straight offshore. The sediment moves straight down the beach with it. The sediment is again picked up by a wave that is coming in at an angle. So longshore drift moves sediment along the shore. This zig-zag motion is pictured below ( Figure below ) and can also be seen at the link below.   Choices:  - boats  - foods  - grass  - sediment   A:
**Answer**
sediment
*Question*
Q: What is studied to understand gene expression patterns in cells?   Read this paragraph and choose the correct option from the provided answers:  RNA is studied to understand gene expression patterns in cells. RNA is naturally very unstable because enzymes that break down RNA are commonly present in nature. Some are even secreted by our own skin and are very difficult to inactivate. Similar to DNA extraction, RNA extraction involves the use of various buffers and enzymes to inactivate other macromolecules and preserve only the RNA. Gel Electrophoresis Because nucleic acids are negatively charged ions at neutral or alkaline pH in an aqueous environment, they can be moved by an electric field. Gel electrophoresis is a technique used to separate charged molecules on the basis of size and charge. The nucleic acids can be separated as whole chromosomes or as fragments. The nucleic acids are loaded into a slot at one end of a gel matrix, an electric current is applied, and negatively charged molecules are pulled toward the opposite end of the gel (the end with the positive electrode). Smaller molecules move through the pores in the gel faster than larger molecules; this difference in the rate of migration separates the fragments on the basis of size. The nucleic acids in a gel matrix are invisible until they are stained with a compound that allows them to be seen, such as a dye. Distinct fragments of nucleic acids appear as bands at specific distances from the top of the gel (the negative electrode end) that are based on their size (Figure 10.3). A mixture of many fragments of varying sizes appear as a long smear, whereas uncut genomic DNA is usually too large to run through the gel and forms a single large band at the top of the gel.   Choices:  - dna  - protein  - mutations  - rna   A:
**Answer**

rna