(Q).
Answer the following question given this paragraph: The geometry of the BF 3 molecule is called trigonal planar . The fluorine atoms are positioned at the vertices of an equilateral triangle. The F-B-F angle is 120, and all four atoms lie in the same plane. Q: The geometry of the bf 3 molecule is called what? Choices: - fractal planar - spherical planar - distorted planar - trigonal planar A:
(A).
trigonal planar

(Q).
Answer the following question given this paragraph: Like the stem, the leaf contains vascular bundles composed of xylem and phloem (Figure 30.27). The xylem consists of tracheids and vessels, which transport water and minerals to the leaves. The phloem transports the photosynthetic products from the leaf to the other parts of the plant. A single vascular bundle, no matter how large or small, always contains both xylem and phloem tissues. Q: Like the stem, what basic plant structure contains vascular bundles composed of xylem and phloem? Choices: - root - flower - bark - leaf A:
(A).
leaf

(Q).
Answer the following question given this paragraph: In biological systems, matter is continuously changing states as well. For example, carbon in the form of the gas carbon dioxide is changed into glucose, a solid. This change, of course, occurs during photosynthesis. During cellular respiration, carbons from the glucose molecule are changed back into the carbon dioxide gas. Q: During cellular respiration, carbons from the glucose molecule are changed back into what gas? Choices: - deformation dioxide - carbon monoxide - liquid dioxide - carbon dioxide A:
(A).
carbon dioxide