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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 1: Support in Plants and the Human Skeletal System — Lesson quiz

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1.
Physiological support in plant cells directly depends upon which biological process?
Lignin deposition on the primary cell wall
Water entry into the vacuole via osmosis generating turgor pressure
Synthesis of suberin in the root cortex
Active transport of sodium ions out of the cytoplasm
2.
What is the total number of bones constituting the adult human vertebral column?
26 bones
24 bones
206 bones
33 bones
3.
Which of the following pairs of ribs are classified as floating ribs?
7th and 8th pairs
8th, 9th, and 10th pairs
1st and 2nd pairs
11th and 12th pairs
4.
Which of the following cellular changes occurs directly when a wilted plant shoot is irrigated with fresh water?
Lignin is immediately deposited inside the xylem vessel walls.
Water enters the vacuole via osmosis, expanding turgor pressure against the cell wall.
Cell sap osmotic pressure increases and cell wall shrinks inward.
Cuticle thickness over leaf epidermis doubles within minutes.
5.
During maximal skeletal muscle contraction according to Huxley's sliding filament model, which region experiences NO change in its absolute length?
The distance between two successive Z-lines
The A-band (dark anisotropic zone)
The I-band (light isotropic zone)
The H-zone (central semi-light region)
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