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Q: Flatworms reproduce sexually. in most species, the same individuals produce both what? Read this paragraph and choose the correct option from the provided answers: Flatworms reproduce sexually. In most species, the same individuals produce both eggs and sperm. After fertilization occurs, the fertilized eggs pass out of the adult's body and hatch into larvae. There may be several different larval stages. The final larval stage develops into the adult form, and the life cycle repeats. Choices: - gametes - heart and sperm - diploid and haploid - eggs and sperm A:
(Answer)
eggs and sperm

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Q: The speed of a particle in what state is directly proportional to the temperature of the system? Read this paragraph and choose the correct option from the provided answers: The speed of a gas particle is directly proportional to the temperature of the system. Choices: - frozen - solid - liquid - gas A:
(Answer)
gas

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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