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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 3 Quiz: The Human Reproductive System and Gametogenesis

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  • Questions count: 20
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1.
The main chemical reducing agent inside the Midrex furnace and its industrial source are respectively:
Hydrogen gas produced from the electrolysis of water
Pure carbon monoxide (CO) produced from metallurgical coke
Water gas (mixture of CO and H2) produced from natural gas (methane CH4)
Carbon dioxide mixed with limestone
2.
The pituitary gland is considered the master of the endocrine glands (the maestro) because:
It secretes stimulating hormones that control the secretions of most other endocrine glands in the body, such as the thyroid, adrenals, and gonads
Connected to the liver
Secretes digestive enzymes
The largest gland by weight
3.
A solution with a pH value of 3.0 is classified as:
Strongly alkaline
Strongly acidic
Neutral
Weakly basic
4.
The mechanical advantage (eta) of an ideal hydraulic press equals all of the following ratios EXCEPT:
Force on the large piston / Force on the small piston (F / f)
Distance moved by the small piston / Distance moved by the large piston (y1 / y2)
Work done by the large piston / Work done on the small piston > 1
Area of the large piston / Area of the small piston (A / a)
5.
The relative density (specific gravity) of a substance is defined as:
The ratio of the density of the substance to the density of pure water at 4°C
The mass of the substance divided by its volume at 100°C
The product of density and the acceleration due to gravity
The reciprocal of the buoyant force
6.
Phenolphthalein indicator cannot distinguish between an acidic solution and a neutral solution because:
It is blue in both
It is colorless in both
It is red in both
It precipitates in both
7.
Asexual reproduction differs from sexual reproduction in that:
Provides great genetic diversity
Expensive in energy and time
It always requires the formation of gametes
It is based on a single parental individual and maintains genetic stability over generations because it is based on mitosis
8.
Reproduction by peaceful association in two adjacent threads of the spirogyra moss (Rem al-Barak) occurs in the case of:
Abundance of pure fresh water
Complete darkness
The environment is exposed to drought, change in water purity, or change in temperature (unsuitable conditions)
Mild spring
9.
Potters use high-temperature ovens called ________ to bake and harden clay vessels.
kilns
blenders
looms
fridges
10.
When examining a patient who suffers from severe weight loss, bulging eyes, rapid heart rate, and high temperature, the doctor diagnoses the condition as:
Exophthalmos caused by excessive secretion of the hormone thyroxine
Dwarfism
Diabetic urine
Myxedema
11.
Solid ionic compounds such as crystal NaCl do NOT conduct electricity in the solid state because:
Electrons are moving too rapidly
They decompose in the presence of air
Their ions are tightly locked in fixed positions within the rigid crystal lattice and cannot move freely
They contain no electrical charges
12.
Party 3' For a DNA strand that ends with a group:
Free amine (-NH2)
Free phosphate (-PO4)
Free hydroxyl (-OH)
Free carboxylate (-COOH)
13.
An aqueous solution of titanium(IV) chloride (TiCl4) is diamagnetic and colorless because:
Titanium is an alkali earth metal
Chlorine ions quench all magnetic dipoles
The Ti4+ ion has an electronic configuration of [Ar] 3d0, devoid of unpaired d-electrons
It absorbs all visible wavelengths of light
14.
Modifying enzymes produced by bacteria work to:
Cracking viruses
Cell wall construction
Sugar analysis
Adding methyl groups (-CH3) to the nucleotides of recognition sites in bacterial DNA to protect it from their shortening enzymes.
15.
The genetic code is characterized as universal because:
It does not change with mutations
The same codons code for the same amino acids in all organisms from bacteria to humans, confirming the common origin of life
It consists of only two letters
It is found in the nucleus only
16.
Artificial parthenogenesis in flowering plants (such as the production of seedless oranges or watermelons) is carried out by:
Irradiating seeds with X-rays
Spraying flower stigmas with pollen extract or indole acetic acid to stimulate the ovary to form fruit without fertilization
Pen vaccination
Tissue culture
17.
The chemical formula of aluminum sulfate is correctly written as:
Al2(SO4)3
AlSO4
Al3(SO4)2
Al(SO4)3
18.
Hydra and planaria share the ability to reproduce asexually by:
Longitudinal binary fission
Budding only
Regeneration
Bacteria formation
19.
The atomic radii of the elements from Chromium to Copper remain remarkably steady and nearly constant across the first transition series because of:
The sudden increase in atomic mass
The identical number of neutrons in their nuclei
Decreasing ionization energies
The mutual compensation between the increasing nuclear charge and the repulsive forces among accumulated 3d electrons
20.
When dry chlorine gas is passed over red-hot iron filings, iron(III) chloride (FeCl3) is exclusively formed rather than iron(II) chloride because:
Chlorine gas is a powerful oxidizing agent that readily oxidizes any formed Fe2+ to Fe3+
Iron(II) chloride spontaneously sublimes into thin air
Chlorine cannot react with the inner 3d electrons
The reaction occurs strictly in an alkaline medium
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