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BSC 108 Exam 1 Solved 100% Correct
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BSC 108 Exam 1 Solved 100% Correct
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BSC 108 Exam 1 Solved 100% CorrectA collection of hypotheses that have been repeatedly tested without rejection is called a
- ANSWER-theory
A new species has been discovered. Individuals of this species are multicellular
eukaryotes that obtain nutrients from decomposing organic matter. In which domain
should this species be classified? - ANSWER-domain Eukarya
A tentative explanation of an observation is - ANSWER-hypothesis
An element is found to contain 33 electrons, 33 protons, and 22 neutrons. Which of the
following is true? - ANSWER-Its atomic number is 33 and its atomic mass is 55.
An enzyme catalyzes a reaction by - ANSWER-lowering the energy of activation of a
reaction
Animal cells have chloroplasts but plant cells do not. - ANSWER-false
Both plant and animal cells have plasma membranes. - ANSWER-true
Communities are more complex than populations. - ANSWER-true
Describe an example of diffusion. - ANSWER-Diffusion is the movement of molecules
from where they are highly concentrated to where they are less concentrated, such as
the diffusion of smoke molecules throughout a room.
Describe one theory that unifies biology as a science. - ANSWER-The theory of
evolution by natural selection unifies biology as a science because it accounts for the
unity and diversity of life on Earth. This theory states that there is an overproduction of
offspring and competition for resources, and variation exists among individual offspring.
Unequal reproductive success (natural selection) among these offspring is the
mechanism of evolution.
Domain Eukarya contains animals, plants, protists, and fungi. - ANSWER-True
How does hydrolysis affect macromolecules? - ANSWER-Hydrolysis is the addition of a
water molecule to one of the covalent bonds of a polymermacromolecule, breaking the
bond and releasing monomer subunits.
If an animal cell is placed in a hypotonic solution, it will swell and burst. - ANSWER-true
In order for an enzyme to work properly - ANSWER-all are true
(a. it must have a particular shape.
b. the temperature must be within certain limits.
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