Brooklyn College Practice Questions With
Expert Solutions
What is an ecosystem?
o All the living and non-living things in an area
What is the biosphere?
o Every ecosystem on earth, its land,water, and portions of the atmosphere
What is a hypothesis?
o Statement that is falsifiable and testable and is based in fact
What is a Null Hypothesis?
o the treatment will NOT have an effect (the result will be the same if we use the
treatment or not)
What is a neutron?
o a particle that has no charge and that is inside the nucleus
What is a proton?
o positively charged particle found in the nucleus
What is an electron?
o a negatively charged particle found outside the nucleus
What does property of life Order mean?
o That living things are organized (from smaller structures to larger structures, i.e.
atoms<molecules<organelles<cells)
What does the property of life Regulation mean?
o Regulation of internal functions
What does the property of life Sensitivity (response to stimuli) mean?
o Reacting to something or lack of something (like pain or lack of air)
What does the property of life Reproduction mean?
, o Passing on ones' genetic information
What does the property of life Adaptation mean?
o Organisms adapt to the environment they are in (through evolution (AKA long
periods of time+ multiple generations))
What does the property of life Growth and Development mean?
o Organisms grow and mature in accordance to their genes
What does the property of life Homeostasis mean?
o The maintaining of internal conditions (ex: blood sugar)
What does the property of life Energy processing mean?
o Uses and converts energy for metabolic activities
What are the parts of a hypothesis
o "If, then, because"
What is an alternative hypothesis?
o The treatment hypothesis, (if we do this then there will be an effect because...)
What is cohesion?
o an attraction between molecules of the same substance (water to water)
What is adhesion?
o An attraction between molecules of different substances (water to something
else)
What is capillary action?
o The ability of a liquid to flow against gravity up a narrow tube (due to the
combined effects of cohesion and adhesion)
What does the term Universal solvent mean?
o that many things can dissolve in water (ex: sugars and acids)
Why is hydrogen bonding so important for properties of water?
o The difference in polarity allows it to stick to itself and other polar surfaces as
well as dissolve things
Is the sentence "I think fish that swim more will swim slower" a valid hypothesis?
, o No (doesn't have "If, then, because")
What are the 4 classes of macromolecules
o carbohydrates, lipids, proteins, nucleic acids
What is the definition of an atom?
o a basic unit of matter
What is the definition of a molecule?
o two or more atoms bonded together (chemical bond)
What is a macromolecule?
o many molecules
Finish the sentence. All living things are made of ____
o cells
What are the two types of cells?
o Prokaryotic and Eukaryotic
Which cell type has organelles?
o Eukaryotic cells
Two basic responses to stimuli
o Positive and negative responses
What is homeostasis?
o Maintaining a stable internal environment
Define population
o individuals of a species living in an area
What is a community?
o Group of 2+ populations in an area
What is the ratio of Carbohydrates?
o 1:2:1 (CH2O)
What is the rough endoplasmic reticulum?
o An organelle that synthesizes and packages proteins. Studded with ribosomes.