*Question*
Q: Ash that enters the air naturally as a result of a volcano eruption is classified as what kind of pollutant? Read this paragraph and choose the correct option from the provided answers: Primary pollutants enter the air directly. Some are released by natural processes, like ash from volcanoes. Most are released by human activities. They pour into the air from vehicles and smokestacks. Several of these pollutants are described below. Choices: - thick pollutant - secondary pollutant - natural pollutant - primary pollutant A:
**Answer**
primary pollutant

*Question*
Q: Only finished mrnas are exported from the nucleus to what? Read this paragraph and choose the correct option from the provided answers: 9.3 Transcription In prokaryotes, mRNA synthesis is initiated at a promoter sequence on the DNA template. Elongation synthesizes new mRNA. Termination liberates the mRNA and occurs by mechanisms that stall the RNA polymerase and cause it to fall off the DNA template. Newly transcribed eukaryotic mRNAs are modified with a cap and a poly-A tail. These structures protect the mature mRNA from degradation and help export it from the nucleus. Eukaryotic mRNAs also undergo splicing, in which introns are removed and exons are reconnected with single-nucleotide accuracy. Only finished mRNAs are exported from the nucleus to the cytoplasm. Choices: - amino acids - cerebellum - electron - cytoplasm A:
**Answer**
cytoplasm

*Question*
Q: What provides the shape of a cell? Read this paragraph and choose the correct option from the provided answers: The cytoskeleton provides the shape of the cell. Choices: - nucleus - cytoplasm - cellulose - cytoskeleton A:
**Answer**
cytoskeleton

*Question*
Q: The abundance of this substance in the atmosphere is what most scientist agree that is causing global warming? Read this paragraph and choose the correct option from the provided answers: Most scientists agree that global warming is caused by more carbon dioxide in the atmosphere (see Figure below ). This increases the greenhouse effect. There is more carbon dioxide mainly because of the burning of fossil fuels. Destroying forests is another cause. With fewer forests, less carbon dioxide is removed from the atmosphere by photosynthesis. Choices: - argon - iron oxide - liquid dioxide - carbon dioxide A:
**Answer**
carbon dioxide