The organelle involved in the oxygen-requiring process by which the energy harvested from macromolecules is used to generate ATP is the
A. nucleus.
B. mitochondria.
C. lysosome.
D. chloroplasts.
E. ER.
Answer: B
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Why is NaHCO3 considered a base in the following reaction? NaHCO3 + HCl ® NaCl + CO2 + H2O
A. It contains hydrogen ions. B. It is a hydrogen ion acceptor. C. It donates hydroxide ions in this reaction. D. It results in the formation of CO2.
The vascular bundle in the shape of a single central cylinder in a root is called the _____
A) cortex B) stele C) periderm D) pith
On the illustration, "A" and "B" should be
labeled respectively a. consumers; producers b. decomposers; producers c. producers; redistributors d. producers; consumers e. consumers; decomposers
An oncologist (a physician who specializes in cancer) compares two biopsy samples by looking at the percentage of cells in mitosis. Sample 1 has 15% of cells in mitosis, and sample 2 has 8% of cells in mitosis
These samples are of the same tissue type. Which sample is likely to be cancerous, and why? Why is it important that the two samples being compared came from the same tissue type?