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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 4 Quiz: Menstrual Cycle, Fertilization, Embryonic Development and Contraception

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1.
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)
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
Female worker bees develop parthenogenetically without fertilization
2.
According to the Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Chargaff's Rules of DNA Base Pairing?
Adenine bonds with Guanine via three hydrogen bonds
In any double-stranded DNA molecule, the percentage of Adenine equals Thymine (%A = %T) and Guanine equals Cytosine (%G = %C), with total purines equaling pyrimidines (%A + %G = %T + %C = 50%)
Uracil replaces Thymine in the double helix of nuclear DNA
The percentage of %A + %T always equals 50% in all organisms
3.
According to the Egyptian STEM biology syllabus, what is the exact scientific deduction regarding: Geological Dating and Index Fossils?
Index fossils must exhibit a wide geographic distribution and a short, well-defined chronological stratigraphic range to accurately correlate sedimentary rock layers
Index fossils must be restricted to a single local rock formation
Index fossils lived continuously throughout all geological eras
Index fossils are formed exclusively in intrusive igneous granite
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