Life Science
Test Questions
Course Introduction
Life Science is the study of living organisms and life processes, encompassing a wide range of topics including biology, ecology, genetics, evolution, and physiology. This course introduces students to fundamental concepts such as the structure and function of cells, the diversity of life, heredity, and the interactions between organisms and their environments. Through a combination of theoretical lessons and practical investigations, students develop a deeper understanding of how living systems operate and adapt, the importance of biodiversity, and the impact of scientific advancements on society and the natural world.
Recommended Textbook
Biology The Essentials 1st Edition by Marille Hoefnagels
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2596 Verified Questions
2596 Flashcards
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Page 2
Chapter 1: Scientific Study of Life
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68 Verified Questions
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Sample Questions
Q1) Which of the following is FALSE about experiments?
A)The larger the sample size the more meaningful the results.
B)The smaller the sample size the more meaningful the results.
C)An experiment is not valid without the proper control.
D)It is important to standardize aspects of an experiment which might affect the outcome,other than the independent variable.
E)All answers are correct.
Answer: B
Q2) In an experiment designed to measure the distance a golf ball is hit by clubs made of different material,all of the variables would be standardized except
A)the wind direction when the experiment takes place.
B)the force used to hit the ball.
C)the type of material the golf ball is made of.
D)the type of material the club is made of.
E)the angle the ball is hit.
Answer: D
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3
Chapter 2: The Chemistry of Life
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Sample Questions
Q1) If a covalent bond is polar
A)electrons are not shared by atoms.
B)protons are shared by atoms.
C)it will not form in living organisms.
D)electronegativity of atoms is unequal in their pull on electrons.
E)the bond is weak in strength.
Answer: D
Q2) The primary building block (monomer)of nucleic acids is A)a nucleotide.
B)a glucose molecule.
C)a fatty acid.
D)an amino aciD.
E)four interconnected carbon rings.
Answer: A
Q3) If a protein is denatured,its structure has changed enough to make the protein nonfunctional.
A)True
B)False
Answer: True
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Page 4
Chapter 3: Cells
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Sample Questions
Q1) What type of microscope would you use if you wanted to examine the ridges on the outside of a larval mollusk shell?
A)light microscope
B)transmission electron microscope
C)scanning electron microscope
D)transmission or scanning electron microscopes
E)light microscope or transmission electron microscope
Answer: C
Q2) In the section "Investigating Life: Did the Cytoskeleton Begin in Bacteria?",scientific evidence suggested that some elements of the cytoskeleton may have originated in bacteria.
A)True
B)False
Answer: True
Q3) All living things can be divided into one of three domains.
A)True
B)False
Answer: True
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Chapter 4: The Energy of Life
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Sample Questions
Q1) When NaCl (table salt)forms,sodium (Na)loses energy by ______ and chlorine (Cl)gains energy by ______.
A)giving up an electron in oxidation;gaining an electron in reduction
B)going with its concentration gradient;going against its concentration gradient
C)going against its concentration gradient;going with its concentration gradient
D)gaining an electron in oxidation;by giving up an electron in reduction
E)gaining an electron in reduction;giving up an electron in oxidation
Q2) Active transport is different from simple diffusion because active transport
A)requires energy.
B)moves molecules against a concentration gradient.
C)requires the use of proteins embedded within the cell membrane.
D)moves molecules from an area of lower concentration to an area of higher concentration.
E)All answers are correct.
Q3) If a cell has a greater concentration of solute than its environment
A)the cell is hypertonic to the environment.
B)the cell is isotonic to the environment.
C)the cell is hypotonic to the environment.
D)the cell will not experience a net gain or loss of water.
E)the cell will diE.
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Chapter 5: Photosynthesis
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Sample Questions
Q1) Leaves of many plants change colors in the fall because
A)the cooler weather causes plants to produce more of the accessory photosynthetic pigments.
B)chlorophyll in the leaves degrades with shorter days and cooler temperatures.
C)the decrease in daylight hours causes the plant to produce more of the accessory photosynthetic pigments.
D)plants produce more chlorophyll.
E)All answers are correct.
Q2) Although the plants are living,why CANNOT plants grow in the dark?
A)Plants require light to produce food.
B)Plants can grow in the dark.
C)Plants require light for cellular respiration.
D)Plants require light to make carbon dioxide.
Q3) Where in a plant do you expect to find the highest concentration of chloroplasts?
A)leaves
B)bark
C)roots
D)stems
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7
Chapter 6: How Cells Release Energy
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Sample Questions
Q1) Glycolysis of a glucose molecule
A)produces a net gain of two molecules of ATP.
B)occurs only in animal cells.
C)transfers electrons from glucose to FAD.
D)occurs only in microorganisms.
E)occurs in mitochondria.
Q2) If you measure the air a person has inhaled and exhaled,you will find that the concentrations have ______ in the exhaled air.
A)higher O<sub>2</sub> concentrations and lower CO<sub>2</sub> concentrations
B)lower O<sub>2</sub> concentrations and higher CO<sub>2</sub> concentrations
C)lower O<sub>2</sub> and CO<sub>2</sub> concentrations
D)higher O<sub>2</sub> and CO<sub>2</sub> concentrations
Q3) A variety of carbohydrates,proteins,and fats in a diet
A)provides many molecules which can enter aerobic respiration at different stages.
B)prevents production of ATP.
C)provides a mixture of molecules which slows ATP production.
D)creates an environment only conducive to fermentation.
E)All choices are correct.
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Chapter 7: DNA Structure and Gene Function
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Sample Questions
Q1) Little energy is needed for protein production because cells are efficient in transcription and translation.
A)True
B)False
Q2) The step of translation in which release factors bind to a stop codon is: A)mitosis.
B)termination.
C)initiation.
D)elongation.
E)transcription.
Q3) Initiation,elongation,and termination are the three main steps in A)translation only.
B)transcription and translation.
C)transcription only.
D)photosynthesis.
Q4) In eukaryotes,a mRNA molecule can only be translated by one ribosome at a time. A)True
B)False
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Chapter 8: DNA Replication and Cell Division
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Sample Questions
Q1) Meiosis is a process used for A)repair of damaged cells.
B)growth of an organism.
C)asexual reproduction.
D)production of stem cells.
E)production of gametes.
Q2) The correct sequence for the phases of mitosis is
A)interphase - prophase - metaphase - anaphase - telophase - cytokinesis.
B)interphase - prophase - metaphase - anaphase - telophase.
C)metaphase - anaphase - prophase - telophase.
D)prophase - metaphase - cytokinesis - anaphase - telophase.
E)prophase - metaphase - anaphase - telophasE.
Q3) DNA and associated proteins in the nucleus defines the term A)centromere.
B)nucleosome.
C)histone.
D)chromatin.
E)chromosomE.
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Chapter 9: Sexual Reproduction and Meiosis
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Sample Questions
Q1) The human chromosomes that do not determine gender are A)not found in pairs.
B)the "X" and "Y" chromosomes.
C)autosomes.
D)called sex chromosomes.
E)None of the answers are correct.
Q2) Mitosis does not require that homologous chromosomes align with one another. A)True
B)False
Q3) If a diploid cell goes through meiosis it will generate
A)two haploid cells.
B)four diploid cells.
C)two diploid cells.
D)four haploid cells.
E)This is not possiblE.
Q4) If the allele for presence or absence of hair is located on the maternal chromosomes #3,then the same allele is located on the paternal chromosome #3.
A)True
B)False
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Chapter 10: Patterns of Inheritance
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Sample Questions
Q1) If a pea plant is heterozygous for yellow seeds (Yy),which gametes will it produce?
A)Y only
B)Y or y
C)y only
D)Yy
E)YYyy
Q2) X-linked recessive disorders affect more females than males.
A)True
B)False
Q3) If a pea plant is homozygous recessive for yellow seeds (yy),which gametes will it produce?
A)Y only
B)y only
C)Yy
D)YYyy
E)Y or y
Q4) The most common allele for any trait is always the dominant allele.
A)True
B)False
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Chapter 11: DNA Technology
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Sample Questions
Q1) An example of DNA technology is
A)transferring genes from a bacterium to a fish.
B)sexual reproduction between two fish.
C)asexual reproduction in one bacterium.
D)a cat feeding upon a mouse.
E)All answers are correct.
Q2) Cloning and sexual reproduction result in two genetically-identical cells/organisms.
A)True
B)False
Q3) Gene probes locate specific DNA sequences by
A)binding with the complementary sequence in a genome.
B)turning off genes in specialized cells.
C)creating cloned genes.
D)electrophoresis.
E)All answers are correct.
Q4) DNA technology can be used to determine how humans are related to other living organisms.
A)True B)False
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Chapter 12: Forces of Evolutionary Change
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Sample Questions
Q1) The geologist who,in 1830,renewed the idea of uniformitarianism by showing that gradual changes in some organisms could be represented in successive fossil layers was
A)Charles Darwin.
B)Charles Lyell.
C)Alfred Russel Wallace.
D)Jean Lamarck.
E)Georges Buffon.
Q2) Evolution occurs in individuals,not populations.
A)True
B)False
Q3) In the section "Investigating Life: Size Matters in Fishing Frenzy",a fish that eats other fish that in turn eat algae is a
A)secondary consumer.
B)producer.
C)primary consumer.
D)detritovore.
E)herbivorE.
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14
Chapter 13: Evidence of Evolution
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Sample Questions
Q1) Absolute dating uses ______ to estimate how old a fossil is.
A)depth within rock layers
B)radioactive isotopes
C)a molecular clock
D)structural features
E)embryonic structures
Q2) The fossil record is often incomplete,simply because scientists will never be able to discover some of the fossils that are buried deep in the earth.
A)True
B)False
Q3) The femur in a snake and pelvis in a whale are examples of A)homologous structures.
B)analogous structures.
C)homeotic structures.
D)vestigial structures.
E)heterologous structures.
Q4) Earth's history spans about 4.6 billion years.
A)True
B)False
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Chapter 14: Speciation and Extinction
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Sample Questions
Q1) Birds are most closely related to A)crocodiles.
B)snakes.
C)mammals.
D)non-avian dinosaurs.
E)amphibians.
Q2) Centimeter-thin layers of earth that are rich in iridium give evidence to support the A)allopatric theory.
B)ecological isolation theory.
C)gradualism theory.
D)impact theory.
E)punctuated equilibrium theory.
Q3) Phylogenetics
A)is the study of evolutionary relationships among species.
B)is the science of describing,naming,and classifying species.
C)are inherited attributes.
D)are features only found in living species.
E)are species unrelated and used for comparison.
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Chapter 15: Evolution and Diversity of Microbial Life
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Sample Questions
Q1) How did the first life on Earth obtain energy?
A)photosynthesis in the presence of oxygen
B)photosynthesis in the absence of oxygen
C)heterotrophic consumption of organic molecules
D)autotrophic consumption of organic molecules
E)phototrophic consumption of inorganic molecules
Q2) Silica walls are characteristic of A)diatoms.
B)euglenoids.
C)red algae.
D)brown algae.
E)slime molds.
Q3) Fungi and animals are similar because they both
A)are phototrophs.
B)have cell walls made of chitin.
C)are heterotrophs.
D)use starch as their main storage carbohydrate.
E)are decomposers.
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Chapter 16: Evolution and Diversity of Plants
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Sample Questions
Q1) Cycads are
A)trees that produce flowers.
B)bryophytes.
C)trees that produce large cones.
D)algae.
E)ferns.
Q2) Bryophytes lack vascular tissue and lignin and therefore cannot
A)sexually reproduce.
B)grow tall.
C)asexually reproduce.
D)produce a gametophyte stage.
E)produce a sporophyte stagE.
Q3) What advantage do gymnosperms have over ferns?
A)Gymnosperms produce pollen and do not require water to reproduce.
B)Gymnosperms have alternation of generations.
C)Gymnosperms have a vascular system,which allows them to grow taller.
D)Gymnosperms can grow larger gametophytes.
E)Gymnosperms can produce flowers and fruits to aid in seed dispersal.
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18
Chapter 17: Evolution and Diversity of Animals
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Sample Questions
Q1) Sea cucumbers and sea urchins belong to the phylum
A)CnidariA.
B)Arthropoda.
C)Echinodermata.
D)Nematoda.
E)Mollusca.
Q2) Which of the following were the first vertebrates to truly thrive on land?
A)amphibians
B)birds
C)mammals
D)reptiles
E)fish
Q3) Which of the following are characteristics of reptiles?
A)They have gills.
B)They are endotherms.
C)They have skeletons composed of cartilage.
D)They are ectotherms with lungs
E)They lack a coelom.
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19
Chapter 18: Population Ecology
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Sample Questions
Q1) In a survivorship curve,a type I species,like a human or elephant,is a species that
A)has an equal probability of dying at any age.
B)has the highest probability of dying as it reaches its maximum life span.
C)has a strong possibility of becoming extinct in a relatively short period of time.
D)has an extremely short life span.
E)has the highest probability of dying at a very young agE.
Q2) A country's ecological footprint can be calculated by multiplying its population size by the footprint of each individual.Why are some ecologists concerned about the ecological footprint of a country like India?
A)Its population is increasing.
B)Its standard of living is increasing.
C)Both its population and standard of living are increasing.
D)Its population and land area are increasing.
E)Its standard of living and land area are increasing.
Q3) When exponential growth is plotted over time a J-shaped curve emerges.
A)True
B)False
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Page 20
Chapter 19: Communities and Ecosystems
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Sample Questions
Q1) In the section "Investigating Life: Two Kingdoms and a Virus Team Up to Beat the Heat",the interaction between panic grass and its endophytic fungus allows them to grow at 65<sup>\(\circ\)</sup>C together,but not independently.This is an example of A)mutualism.
B)commensalism.
C)parasitism.
D)predation.
E)competition.
Q2) If there are 10,000 calories of net primary productivity in an ecosystem,how much energy will be generally available to a primary consumer?
A)100 calories
B)10,000 calories
C)10 calories
D)1,000 calories
E)1 calorie
Q3) A network of interconnected food chains is a food web.
A)True
B)False
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21
Chapter 20: Preserving Biodiversity
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Sample Questions
Q1) The ozone layer absorbs much of the harmful UV wavelengths of light that would otherwise reach Earth.
A)True
B)False
Q2) Which of the following is not an effect of acid deposition?
A)destruction of aquatic food webs
B)thinning of high-elevation forests
C)decrease in the number of species that can survive in the lake ecosystem
D)increase of pH in lakes
E)deformities in fish and other aquatic organisms
Q3) What resulted in the biodiversity on Earth?
A)evolution
B)global climate change
C)the greenhouse effect
D)overexploitation
E)bycatch
Q4) After nearing extinction in the 1960s,the bald eagle population is now about 10,000.
A)True
B)False
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Chapter 21: Plant Form and Function
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Sample Questions
Q1) The shoot of a plant is the above-ground part of a plant.
A)True
B)False
Q2) The primary root of a plant that enlarges and persists throughout the life of the plant is the
A)fibrous root.
B)companion root.
C)rhizome.
D)stoma.
E)taproot.
Q3) In the section "Investigating Life: The Hidden Cost of Traps",a normal pitcher has a narrow keel and a wide pitcher opening,maximizing the potential for trapping prey.On the other hand,a leaf optimized for photosynthesis has a wide keel and a small pitcher opening.Based on this observation and the figure,what conclusion can be drawn?
A)High phosphorus correlated with increased photosynthetic ability.
B)High nitrogen correlated with increased photosynthetic ability.
C)High nitrogen correlated with increased trapping ability.
D)High phosphorus correlated with increased trapping ability.
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Chapter 22: Reproduction and Development of Flowering Plants
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Sample Questions
Q1) The size of a plant's seeds reflects an evolutionary trade-off.Large,heavy seeds contain ample nutrient reserves to fuel seedling growth but may not travel far.Small seeds,on the other hand,store limited nutrients but tend to disperse far and wide.The crops that humans cultivate typically have larger seeds than do their wild ancestors.Why would humans primarily cultivate plants with larger seeds?
A)The plants with smaller seeds can already spread easily.
B)Smaller seeds are harder to collect.
C)The plants with larger seeds grow better with added fertilizer.
D)We eat the seeds.
E)We cannot grow plants with smaller seeds.
Q2) Reproduction of flowering plants
A)relies upon wind to disperse seeds.
B)relies upon wind to disperse pollen.
C)All answers are correct.
D)relies upon animals to disperse pollen.
E)relies upon animals to disperse seeds.
Q3) Coconuts are fruits containing seeds that are usually wind-dispersed.
A)True
B)False
Page 24
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Chapter 23: Animal Tissues and Organ Systems
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Sample Questions
Q1) The type of epithelial tissue that forms a single layer of elongated cells is
A)stratified cuboidal.
B)simple squamous.
C)stratified squamous.
D)stratified columnar.
E)simple columnar.
Q2) The systems that support and move the body are
A)skeletal and muscular.
B)nervous and endocrine.
C)circulatory and respiratory.
D)digestive and circulatory.
E)urinary and immunE.
Q3) Which tissue within skin is responsible for producing sweat?
A)epithelial
B)connective
C)muscle
D)nervous
E)endocrine
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25
Chapter 24: Nervous System and the Senses
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Sample Questions
Q1) An action potential will occur only if
A)sodium ions are released into the interior of the axon.
B)the interior of the axon becomes less negative than the resting potential.
C)the threshold potential is reached.
D)a stimulus triggers a neuron to fire.
E)All answers are correct.
Q2) Odorous molecules are first detected in the nose,are transduced and travel to the olfactory bulb and then to the cerebral cortex.
A)True
B)False
Q3) Which of the following senses would not utilize mechanoreceptors?
A)hearing
B)touch
C)taste
D)equilibrium
Q4) Molecules produced by humans that influence mood and the perception of pain are opiates.
A)True
B)False
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Chapter 25: The Endocrine System
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Sample Questions
Q1) The hormone that stimulates glycogen to be broken down to glucose is A)insulin.
B)calcitonin.
C)aldosterone.
D)glucagon.
E)melatonin.
Q2) Type 2 diabetes is strongly associated with A)obesity.
B)old age.
C)premature infants.
D)a suppressed immune system.
E)calcium deficiency.
Q3) Which of the following has its primary effect on the brain's pain receptors?
A)ACTH
B)FSH and LH
C)endorphins
D)oxytocin
E)ADH
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27
Chapter 26: The Skeletal and Muscular Systems
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Sample Questions
Q1) An area where two bones meet is called a A)synapse.
B)joint.
C)synaptic cleft.
D)vascular cavity.
E)olfactory bulb.
Q2) Ligaments connect bone to bone.
A)True
B)False
Q3) If you placed an electrode on a person's triceps and stimulated the muscle,which of the following would occur?
A)They would not be able to straighten their leg.
B)They would not be able to straighten their arm.
C)They would not be able to bend their leg.
D)They would not be able to bend their arm.
Q4) According to the sliding filament model,a muscle fiber contracts when thick filaments slide between thin filaments,lengthening the sarcomere.
A)True
B)False
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Chapter 27: The Circulatory and Respiratory Systems
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Sample Questions
Q1) The walls of the bronchioles are made up of
A)cartilage.
B)smooth muscle.
C)cartilage and smooth muscle.
D)cartilage and skeletal muscle.
E)skeletal musclE.
Q2) In the section "Investigating Life: In (Extremely)Cold Blood",among the ice fishes,Neopagetopsis ionah had white blood but intact alpha and beta globin genes.Why was their blood still white?
A)The fish could produce hemoglobin,but not red blood cells.
B)The alpha and beta genes were both fragmented.
C)The alpha and beta genes were both deleted.
D)The genes were mutated in a way that leaves the fish unable to produce hemoglobin.
E)The fish could produce hemoglobin,but it did not contain an iron atom.
Q3) The narrowing of blood vessels is
A)vasoconstriction.
B)cardioconstriction.
C)vasodilation.
D)cardiodilation.
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Page 29
Chapter 28: Regulating Temperature, nutrients, and Body
Fluids
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Sample Questions
Q1) Animals that eat only plants are A)omnivores.
B)herbivores.
C)carnivores.
D)detritivores.
E)insectivores.
Q2) The enzyme that breaks down the main sugar found in milk is A)lipase. B)amylase. C)lactase.
D)pepsin.
E)bilE.
Q3) The human small intestine is shorter than the large intestine. A)True B)False
Q4) The renal vein transports oxygen-rich blood to the kidney. A)True B)False
Page 30
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Chapter 29: The Immune System
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Sample Questions
Q1) Every year the common flu vaccine is designed to protect against three different strains of the influenza virus.How is your body able to raise antibodies against so many new forms of the flu virus?
A)Each B cell can make antibodies against all antigens.
B)The vaccine contains the antibodies against the strains of flu virus so your body does not need to make them.
C)Viruses are destroyed by the passive immune system.
D)Clonal deletion of B and T cells that recognize the virus occurs.
E)Recombination of the gene used to make antibodies occurs.
Q2) A molecule that stimulates an immune-system reaction by B cells and T cells is termed a(n)
A)antibody.
B)antigen.
C)substrate.
D)phagocyte.
E)complement protein.
Q3) In an autoimmune disease,the immune system attacks the body's "self antigens."
A)True
B)False
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Page 31
Chapter 30: Animal Reproduction and Development
Available Study Resources on Quizplus for this Chatper
77 Verified Questions
77 Flashcards
Source URL: https://quizplus.com/quiz/61951
Sample Questions
Q1) The intake of alcohol,cigarette smoke,and insufficient amounts of vitamins may all cause birth defects in a developing fetus.
A)True
B)False
Q2) Birth control pills contain a combination of estrogen and progesterone.What effect would this have on the anterior pituitary?
A)It would secrete less FSH and LH.
B)It would secrete less gonadotrophin-releasing hormone.
C)It would secrete more gonadotrophin-releasing hormone.
D)It would secrete more FSH and LH.
E)There would be no effect on the anterior pituitary.
Q3) The surge of the hormone _______________ in the bloodstream of the female triggers ovulation.
A)FSH
B)LH
C)estrogen
D)progesterone
E)GnRH
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