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80 Cards in this Set
- Front
- Back
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Scientists often use experiments to test their __, which are possible explanations for observations. (predictions or hypothesis)
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Hypothesis
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__ is defined as the amount of space something occupies. (Mass or Volume)
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Volume
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A life scientist would use a(n) ___ to magnify a living specimen. (electron microscope or compound light microscope)
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Compound Light Microscope
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A set of related hypotheses that are supported by evidence may become accepted as a __. (theory or scientific method)
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Theory
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___ is the use of knowledge, tools, and materials to solve problems and accomplish tasks. (Technology or Life Science)
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Technology
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True or False? Studying how wasps could be used to control fire ant populations is where you would find a life scientist working.
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True
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When researchers use the scienticic method they should...
a. repeat or switch the order as needed b. ignore results that contradict well-established theories c. try to study as few subjects or individuals as possible d. find the answers to complex questions very quickly. |
A. repeat or switch the order of steps as needed.
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True or False? A Scientist who wants to study the possible side effects of a new medice would include a control group that recieved no medicine.
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True
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Which tool would a life scientist use to obtain a detailed image of the nerves that branch off a person's spinal cord?
a. a scanning electron microscope b. an X Ray c. a transmission electron microscope. d. an MRI |
D. an MRI
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True or False? An advantage of using the International System of Units is that it gives scientists a common way to share their results.
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True
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In a scientific experiment, a hypothesis that cannot be tested is always considered to be...
a. incorrect b. illogical c. not useful d. a theory |
C. Not Useful
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A __ object contains the same amount of matter as a 10kg object.
a. 100g b. 10,000g c. 1,000g d. 100,00g |
B. 10,000g
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In the cell membrane, ___ molecules form two layers. (protein or phospholipid)
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Phospholipid
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When a planarian worm is cut in half, each half develops into a whole worm. This is an example of __ reproduction. (asexual or sexual)
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Asexual
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___ are sometimes called the blueprints of life. (Proteins or Nucleic Acids)
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Nucleic Acids
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___ is the passing of traits from one generation to the next. (Homostasis or Heredity)
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Heredity
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___ refers to all of the chemical activities that an organism's cells perform. (Metabolism or Homeostasis)
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Metabolism
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___ is a complex carbohydrate manufactured by plants.
a. Oil b. Protein c. Starch d. Hemoglobin |
C. Starch
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When a duck dives under water its inner eyelids automatically raise to cover the duck'e eyes. In case, water acts as...
a. homeostasis b. stimulus c. a reaction d. an enzyme |
B. Stimulus
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The molecule that provides energy for cellular processes is
a. ATP b. DNA c. RNA d. protein |
a. ATP
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The subunits of proteins are...
a. enzymes b. amino acids c. nucleotides d. protein |
b. Amino Acids
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Cells do not use ___ for energy storage.
a. fats b. oils c. carbohydrates d. nucleic acids |
D. Nucleic Acids
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True or False? Proteins are the primary source of energy for cells.
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False
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True or False? All cells have a nucleus and a cell membrane.
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True
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A Life Scientist wo observes the relationships between plants, animals, weather, and soil on a mountain top is studying a(n)
a. community b. population c. ecosystem d. organism |
C. Ecosystem
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Which of the following is NOT found in plant cells?
a. lysosome b. ribosome c. cell membrane d. Golgi Complex |
A. Lysosome
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Which of the following contain cellulose?
a. plant cells b. all mushroom cells c. all eukaryotic cells d. some prokaryotic cells |
A. All Plant Cells
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Which part of a cell manufactures lipids?
a. nucleolus b. endoplasmic reticulum or ER c. cell membrane d. vesicle |
B. Endoplasmic Reticulum or ER
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True or False? Materials that are to be released outside the cell are transported to the cell membrane in a small compartment that has pinched off the Golgi Complex.
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True
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Which of the following is NOT a characteristic of bacteria?
a. They are prokaryotes. b. Their DNA is one long, circular molecule c. They have an endoplasmic reticulum or ER d. They have a cell membrane. |
C. They have an endoplasmic reticulum or ER
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___ are made up of various tissues that work together to perform a specific job. (Organs or Organelles)
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Organs
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The role of the ___ is to release energy that can be used to power various cellular processes. (nucleous or mitochondria)
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Mitrochondria
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Unlike animal cells, plant cells have __ to capture energy from the sun. (nuclei or choroplasts)
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Choroplasts
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DNA, the genetic material of a eukaryotic cell, is located in the cell's ___. (nucleus or ribosome)
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Nucleus
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Cells that have no membrane-covered organelles are ___. (Prokaryotic or Eukaryotic)
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Prokaryotic
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A part of the Golgi Complex can pinch off and form a ___, which contains digesting enzymes. (Lysosomes or ribosome)
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Lysosome
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___ is the random movement of particles from an area of high concentration to an area of low concentration. (Active Transport or Diffusion)
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Diffusion
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Plants produce their own food by the process of __. (photosynthesis or fermentation)
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Photosynthesis
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Food molecules that are too large to pass easily through the cell membrane can enter the cell by __. (Endycytosis or exocytosis)
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Endocytosis
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Human body cells have 23 pairs of ___. (chromatids or homologous chromosomes)
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Homologous Chromosomes
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The process of cell division in a bacterial cell is called ___. (mitosis or binary fission)
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Binary Fission
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Food particles move through proteins in the cell membrane without using energy in a process called...
a. osmosis b. active transport c. passive transport d. endocytosis |
C. Passive Transport
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When wilted celery is soaked in water, it becomes very crisp again due to...
a. exocytosis b. active transport c. vesicle movement d. osmosis |
D. Osmosis
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Fermentation in animal cells produces...
a. glucose and carbon dioxide b. alchohol and ATP c. latic acid and ATP d. latic acid and carbon dioxide |
C. Latic Acid and ATP
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Oxygen is used to break down food molecules and release energy in a process called...
a. photosytheis b. cytokinesis c. cellular respiration d. fermentation |
A. Glucose
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Which of the following is NOT used to make glucose in photosythesis?
a. H20 b. 02 c. C02 d. light energy |
B. O2
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A ____ plant produces offspring with the same traits as the parent. (self-pollinating or true-breeding)
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true-breeding
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The physical expression of an organism's genes is its __. (phenotype or genotype)
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Phenotype
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Each parent donates a set of instructions, known as ___ to its offspring. (genes or proteins)
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Genes
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When Mendel performed genetic crosses, the traits that seemed to vainsh were ____. (dominat traits or recessive traits)
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Recessive Traits
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Eggs and the sperm are ___. (sex chromosomes or sex cells)
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Sex Cells
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These may be dominat or recessive.
a. alleles b. punnet squares c. phenotypes d. sex cells |
A. Alleles
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If you cross two rabbits that have the genotype Bb, how many possible genotypes can be found in the offspring?
a. one b. two c. three d. four |
C. Three
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How many chromosomes are present in a normal human sex cell?
a. 22 b. 23 c. 46 d. 92 |
B. 23
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If a purple with the genotype Pp P=Purple; p-white) self pollinates, the ratio of purple offspring to whit offspring would be...
a. three purple:one white b. two purple: two white c. one purple:zero white d. four purple:zero white |
A. Three purple:one white
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Probability is...
a. always less than 50 percent b. the mathematical chance that an event will occur c. always an even number d. All of the above |
B. the matematical chance that an event will occur.
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Genes are composed of subunits known as ___. (ribosomes or nucleotides)
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Nucleotides
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Chargaff's rules state that the amount of ____ in DNA is always equal to the amount of guanine. (cytosine or adenine)
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Cytosine
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___ alows scientists to transfer genes from one organism to another. (DNA Fingerprinting or Genetic Engineering)
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Genetic Engineering
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____ is a tool for tracing a genetic trait through generations of a family. (A Punnet Square or A pedigree)
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A pedigree
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Examples of chemical ___ include asbestos and chemicals found in cigerette smoke. (mutations or mutages)
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Mutations
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True or False? The code given amino acids consists of three bases.
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True
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True or False? The materials make up each nucleotide in a DNA molecule are a sugar, phosphate, and a base.
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True
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Most genetic disorders such as sickle cell anemia, are due to a ____.
a. pedigree b. recessive gene c. dominat gene d. ribosome |
B. Recessive Gene
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The complementary strand to the DNA sequence TAGTCA would be...
a. ATGAGT b. GACAGT c. GTAGAT d. ATCAGT |
D. ATCAGT
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True or False? The envirnment has no influence on a person's traits.
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False
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Genetic engineering is currently used to...
a. genetically alter plants b. repair damaged genes c. manufacture proteins d. All of the above |
D. All of the above
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Which of the following could cause sickle cell anemia?
a. a change in the order of bases in a person's DNA b. a virus c. a bacterium d. air pollution |
A. A change in the order of bases in a person's DNA.
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A pine tree is a member of what kingdom?
a. Animalia b. Protista c. Fungi d. Plante |
D. Plante
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Some members of the kingdom Protista
a. have flaggella b. are bacterial organisms c. are mushrooms d. have no nucleus |
A. Have flaggea
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True or False? The seven levels of classification are Kingdom, Phylum, Class, Order, Family, Genus and Species.
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True
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Linnaeus is known for...
a. founding the science of taxonomy b. proposing the theory of evolution by natural selection c. identifying the characterisitcs of rare species d. creating the mnemonic device for recalling the leves of classification. |
A. Founding the science of taxonomy.
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Organisms in the kingdom __ ususally move by themselves and have advanced nervous systems that allow them to respond to their envirnment.
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Animalia
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The scientific name for the common house cat is Felis domesticus. What is its species name?
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domesticus
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Eubacteria do NOT
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live in hot springs
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Fungi obtain nutrients by...
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absorbing them from their surroundings.
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Members of kingdom __ include such organisms as the mold that grows on bread.
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Fungi
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Orders of organisms are further broken down into...
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Families
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Two organisms that are in the same class will also be int he same __.
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Phylum
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Some organisms in the kingdom ___ are able to live inside the human body.
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Eubacteria
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