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Biology & Geology (STEM)

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.
The secondary meiotic division (Meiosis II) of human oogenesis takes place exclusively in the:
Uterine cavity
Fallopian tube (oviduct) at fertilization
Ovarian Graafian follicle
Cervical canal
2.
According to the Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Physiological vs. Structural Support in Plants?
Both physiological and structural supports disappear immediately when the plant wilts
Structural support relies solely on turgor pressure of living parenchyma
Physiological support is temporary and completely dependent on water uptake into vacuoles via osmosis, while structural support is permanent via deposition of cellulose, lignin, or suberin
Physiological support involves permanent deposition of lignin in stone cells
3.
According to the Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Sliding Filament Theory of Muscle Contraction (Huxley)?
During sarcomere contraction, actin filaments slide over myosin filaments; the I-band and H-zone shorten, while the A-band length remains strictly constant
Both A-band and myosin filaments shrink by 50% in length
Z-lines move away from each other as the muscle contracts
Cross-bridges pull actin filaments outward away from the M-line
4.
According to the Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Hormonal Regulation of Blood Glucose (Insulin and Glucagon)?
Glucagon is secreted by the adrenal cortex under stress
Beta cells of the islets of Langerhans secrete insulin to lower blood glucose by stimulating cellular uptake and glycogen synthesis, while alpha cells secrete glucagon to raise blood glucose by glycogenolysis
Alpha cells secrete insulin to elevate blood glucose levels
Insulin stimulates the breakdown of liver glycogen into glucose
5.
According to the Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Parthenogenesis in Honeybees (Apis mellifera)?
Male drones arise from fertilized diploid zygotes (2n)
Female worker bees develop parthenogenetically without fertilization
Drones produce sperm cells by meiotic division
The queen honeybee produces haploid drones (males, n) from unfertilized eggs via parthenogenesis, whereas diploid worker and queen females (2n) arise from fertilized eggs
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