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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 2: Rock Cycle, Minerals, Crystallography and Weathering — Lesson quiz

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1.
Which of the following minerals exhibits absolute chemical resistance to carbonation weathering by acidic rain?
Calcite
Feldspar
Quartz
Olivine
2.
Which of the following cellular changes occurs directly when a wilted plant shoot is irrigated with fresh water?
Cell sap osmotic pressure increases and cell wall shrinks inward.
Lignin is immediately deposited inside the xylem vessel walls.
Cuticle thickness over leaf epidermis doubles within minutes.
Water enters the vacuole via osmosis, expanding turgor pressure against the cell wall.
3.
During maximal skeletal muscle contraction according to Huxley's sliding filament model, which region experiences NO change in its absolute length?
The I-band (light isotropic zone)
The H-zone (central semi-light region)
The distance between two successive Z-lines
The A-band (dark anisotropic zone)
4.
What is the biochemical cause of continuous, non-relaxing muscle spasm that can cause muscular tearing?
Complete depletion of cellular ATP molecules, preventing cross-bridge detachment.
Sudden accumulation of glucose inside glycogen granules.
Abrupt accumulation of excessive calcium ions in the synaptic cleft.
Excessive breakdown of acetylcholine by the enzyme acetylcholinesterase.
5.
How many cervical vertebrae are present in the adult human vertebral column?
7 vertebrae
4 vertebrae
12 vertebrae
5 vertebrae
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