MTTC Integrated Science Exam Questions with Correct Answers
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MTTC Integrated Science
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MTTC Integrated Science
MTTC Integrated Science Exam Questions with Correct Answers
Characteristics of Living Things - Answer-1. Made of cells, grow, capable of reproduction, and respond to stimuli
2. Adapt to environmental stimuli or perish
3. Carry on metabolic processes. They use and make energy.
Mitosis - Answer...
MTTC Integrated Science Exam
Questions with Correct Answers
Characteristics of Living Things - Answer-1. Made of cells, grow, capable of
reproduction, and respond to stimuli
2. Adapt to environmental stimuli or perish
3. Carry on metabolic processes. They use and make energy.
Mitosis - Answer-1. Division of somatic cells
2. Two cells result from each division
3. Chromosome # is identical to parent cells
4. For cell growth and repair
Meiosis - Answer-1. Division of sex cells
2. Four cells result from each division
3. Chromosome # is half the # of parent cells
4. Recombinations provide genetic diversity
Commonalities Among all Sciences - Answer-- Systems, order, and organization
- Evidence, models, and explanation
- Constancy, change, and measurement
- Evolution and equilibrium
- Form and function
Empirical Evidence - Answer-All evidence is empirical; all evidence must be observed
by the five sense.
Peer-reviewed Journals - Answer-Most accepted source for information on scientific
experiments and studies
Air Pollution - Answer-Chemicals in the air; include carbon monoxide, sulfur dioxide,
and chlorofluorocarbons (CFC's)
Water Pollution - Answer-Contaminants enter water by ground runoff or by leaching
Thermal pollution - Answer-Factories dump water at high temperatures which increases
normal water temperatures. This means the water can hold less gas, disrupting the
ecosystem
Greenhouse gasses - Answer-I.e. carbon dioxide and nitrous oxide. Concentration of
them is increased by burning fossil fuels. These gasses absorb and trap heat, therefore
warming the planet
,Independent Variable - Answer-The experimental factor that is manipulated; the variable
whose effect is being studied. Placed on the x-axis (horizontal) on a graph.
Dependent Variable - Answer-The variable that is measured in an experiment. Placed
on the y-axis (vertical) on a graph.
Scientific theory - Answer-Must be repeatable. Possible to be disproved and capable of
change.
Sampling and Sample Size - Answer-Random sampling is the preferred, but isn't always
possible. A large sample will yield the most accurate information.
Manipulating Variables - Answer-Only one variable should be manipulated at a time.
Control variable - Answer-A factor that is held constant to test the relative impact of an
independent variable
Response to Lab Accident - Answer-In most cases, 911 should be called immediately.
Response to Fire in a Beaker or Flask - Answer-Do not use a fire extinguisher. Just
place a watch glass or wet towel over it to cut off Oxygen supply.
Guidelines for Dissections - Answer-Specimens should be rinsed before using. Latex
glover preferred. Avoid use of formaldehyde/dispose of correctly. Need to provide
alternative for students with moral objections to assingment.
Storing Lab Chemicals - Answer-Store all in secured, dry area. Acids locked in separate
area.
Origin of Biological Sciences - Answer-Traced back to ancient Greeks (i.e. Aristotle)
Andrea Vesalius - Answer-Dissected human bodies; created a book on anatomy
Anton van Leeuwenhoek - Answer-Father of Microscopy, first to see and describe
bacteria, yeast plants, and microscopic life found in water
Scanning Electron Microscope (SEM) - Answer-Instead of a light, a beam of electrons
pass through specimen. Resolution about 1,000 times greater than light microscope.
Will kill specimen though.
Robert Hooke - Answer-Famous for Hook's law describing elasticity. But called a
"virtuoso", able to contribute findings to any major field in science
Carl Von Linnaeus - Answer-Famous for binomial system of nomenclature. Each living
organism has two names, a genus and species. Considered father of modern ecology
and taxonomy
, Pasteur - Answer-Discovered role of microorganisms in the cause of disease,
pasteurization, and rabies vaccine.
Koch's Postulates - Answer-Specific diseases caused by specific pathogens
Cell theory - Answer-Cell is the common structural unit in plants and animals. Proposed
by Mattias Scheleiden and Schwann.
Watson and Crick - Answer-Discovered the structure of DNA was a double helix (in the
1950s). Made it possible to understand how DNA replicated and synthesized proteins
Acid ran - Answer-Sulfur and nitrous oxides converted to acids and contaminate water
supplies
Prokaryotes - Answer-Single-celled organisms that do not have a membrane-bound
nucleus
Flagella - Answer-Appendages on bacteria cells; used for movement
Pili - Answer-Used by bacteria cells to attach to other cells
Cell Wall - Answer-a thin membrane around the cytoplasm of a cell
Cell membrane - Answer-a phospholipid layer that covers a cell's surface and acts as a
barrier between the inside of a cell and the cell's environment
Eukaryotes - Answer-organisms whose cells contain a nucleus and other membrane
bound organelles
Nucleus - Answer-a part of the cell containing DNA and RNA and responsible for growth
and reproduction
Nucleolus - Answer-The organelle where ribosomes are made, synthesized and partially
assembled, located in the nucleus
Ribosomes - Answer-site of protein synthesis
Endoplasmic Reticulum - Answer-an internal membrane system in which components of
cell membrane and some proteins are constructed
Golgi apparatus - Answer-stack of membranes in the cell that modifies, sorts, and
packages proteins from the endoplasmic reticulum
Lysosomes - Answer-An organelle containing digestive enzymes; found mostly in
animal cells
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