Bacterial chemoautotrophs use organic chemicals as an energy source
____________ Indicate whether the statement is true or false.
False - inorganic
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Choose the option that best describes the relationship between the cell wall thickness of parenchyma cells versus sclerenchyma cells
A) The cell walls of parenchyma cells are thinner than those of sclerenchyma cells. B) The cell walls of parenchyma cells are thicker than those of sclerenchyma cells. C) The thickness of the cell walls for both types of cells is roughly equal. D) The thickness of the cell walls for both types of cells is too variable for a comparison to be made.
Genotype is to _____ as phenotype is to _____
A) DNA base sequence; physical traits that are products of the proteins produced B) heredity; DNA base sequence C) gene regulation; translation D) transcription; amino acid sequence
The HIV virus that causes AIDS is an RNA retrovirus. A retrovirus _____
A) uses DNA as a template in the process of translation B) makes proteins directly from RNA C) used reverse transcriptase to make DNA from RNA D) a cellular virus that uses ribosomes to reproduce inside a living cell
Which of the following organisms has a pattern of gastrulation that is the most similar to humans?
a. amphibians b. birds c. drosophila d. sea urchin e. zebra fish