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Biology & Geology

Chapter 1 - Support and Movement in Living Organisms

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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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Chapter 7 - Geology, Earth Sciences and Ecology

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Quiz

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

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  • Questions count: 9
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1.
If a, b, c form an arithmetic sequence, then the arithmetic mean b equals:
b = (a + c) / 2
b = 2 a c / (a + c)
b = a + c
b = sqrt(a * c)
2.
If a, b, c form a geometric sequence of positive real numbers, the geometric mean b equals:
b = a * c
b = a2 + c2
b = (a + c) / 2
b = + sqrt(a * c)
3.
If (x - 1, x + 2, 3x) form a geometric sequence, the positive value of x is:
4
2
6
3
4.
The movement of hydrotropism in plant roots is considered tropism:
Negatively
Positive (the root bends in the direction of moisture and water concentration)
randomly
Unaffected
5.
Peyer's spots's Patches) Tiny lymph nodes spread in the mucous membrane lining the:
Lower part of the small intestine (ileum)
esophagus
Stomach
Pharynx
6.
The location where fertilization of the egg by the sperm occurs in the human female reproductive system is:
First third of the fallopian tube (near the infundibulum)
the vagina
Directly to the ovary
Internal uterine cavity
7.
The Ancon breed mutation in sheep with short, arched legs is considered a mutation:
Numerical chromosome
Fatal to fetuses
A useful mechanism that the breeder kept in mind to prevent sheep from jumping fences and damaging crops
Harmful innovation
8.
The polyadenyne tail (Poly-A Tail) added to the end of the mRNA molecule in eukaryotes consists of about 200 adenine nucleotides and functionally functions to:
Encoding polar amino acids
Formation of the nuclear envelope
Binding to the polymerase enzyme
Protecting the mRNA molecule from degradation by enzymes in the cytoplasm
9.
The global scientific project that was able to decipher and arrange more than 3 billion pairs of nitrogenous bases in human cells is:
Acquired immunity project
Virus study project
Human Genome Project
Stem cell project
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