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1. Three balloons, A, B, and C, are given a charge and placed next to each other. A and B are found to repel. Later, B and C are

1. Three balloons, A, B, and C, are given a charge and placed next to each other. A and B are found to repel. Later, B and C are found to repel each other. Which of the following statements MUST be true about balloons A and C? a. A and C are both positively charged b. A and C are both negatively charged C. The charges on A and C have opposite signs d. The charges on A and C have the same sign

1. Three balloons, A, B, and C, are given a charge and placed next to each other. A and B are found to repel. Later, B and C are found to repel each other. Which of the following statements MUST be true about balloons A and C? a. A and C are both positively charged b. A and C are both negatively charged C. The charges on A and C have opposite signs d. The charges on A and C have the same sign

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Furthermore, which of the following adaptations were critical to adaptation in the earliest land plants? a. cellulose cell walls, chlorophyll, pollen b. cuticle, pollen, seeds C. chlorophyll , cuticle, stomata, rhizoids d. cuticle, stomata, rhizoids, vascu

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Question 12 (1 point) As thyroxin is released from the thyroid gland, it accumulates, inhibits the anterior pituitary gland and reduces the production of TSH by negative feedback. Iodine is an ingredient in the production of thyroxin. Lack of dietary iodin

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Question 12 (1 point) As thyroxin is released from the thyroid gland, it accumulates, inhibits the anterior pituitary gland and reduces the production of TSH by negative feedback. Iodine is an ingredient in the production of thyroxin. Lack of dietary iodine results in an enlarged thyroid gland known as a goitre. Which of the following BEST explains how a lack of iodine causes the thyroid to enlarge and become a goitre? High levels of TSH over stimulate the thyroid gland. An enlarged thyroid compensates for the lack of iodine. High levels of calcitonin over stimulate the thyroid gland. An enlarged thyroid increases the production of TSH.

The arrow indicates a group of A) vacuoles B) plasmodesmata OC) crystals OD) sclereids E) nuclei F) collenchyma MacBook Air 80 F3 F4 F6 F6 DI F8 F $ % ^ & # 3 4 5 6 7 * 00 8 9 E R T Y Y U I F G H j J J K C B N. M

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The arrow indicates a group of A) vacuoles B) plasmodesmata OC) crystals OD) sclereids E) nuclei F) collenchyma MacBook Air 80 F3 F4 F6 F6 DI F8 F $ % ^ & # 3 4 5 6 7 * 00 8 9 E R T Y Y U I F G H j J J K C B N. M