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Biology & Geology

Chapter 2 - Hormonal Coordination in Living Organisms

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Chapter 3 - Reproduction in Living Organisms

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Chapter 4 - Immunity in Living Organisms

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Chapter 5 - Molecular Biology - DNA Structure and Function

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Chapter 6 - Molecular Biology - RNA, Protein Synthesis and Genetic Engineering

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Quiz

Lesson 3: The Human Reproductive System and Gametogenesis — Lesson quiz

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1.
Which of the following cellular changes occurs directly when a wilted plant shoot is irrigated with fresh water?
Water enters the vacuole via osmosis, expanding turgor pressure against the cell wall.
Cuticle thickness over leaf epidermis doubles within minutes.
Cell sap osmotic pressure increases and cell wall shrinks inward.
Lignin is immediately deposited inside the xylem vessel walls.
2.
What is the biochemical cause of continuous, non-relaxing muscle spasm that can cause muscular tearing?
Abrupt accumulation of excessive calcium ions in the synaptic cleft.
Sudden accumulation of glucose inside glycogen granules.
Excessive breakdown of acetylcholine by the enzyme acetylcholinesterase.
Complete depletion of cellular ATP molecules, preventing cross-bridge detachment.
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