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Biology 189 Exam 1 with correct answers.
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Biology 189 Exam 1 with correctanswers
*Chapter 1*
Summarize the five characteristics of life - correct answer -1. Organization: atoms make up molecules,
which make up cells, which make up tissues, and so on.
2. energy use: a kitten uses the energy from its mothers milk to fuel its own groth
3. maintenance of internal consistency (homeostasis): your kidneys regulate your body's water balance
by adjusting the concentration of your urine
4. Reproduction, growth, and development: an acorn germinates, developed into an oak seedling, and,
at maturity, reproduces sexually to produce its own acorns
5. Evolution: increasing numbers of bacteria survive treatment with antibiotic drugs.
all of the following are characteristics of life EXCEPT:
a. evolution
b. reproduction
c. homeostasis
d. multicellularity - correct answer -d. multicellularity
the concentration of salts in blood remains relatively steady, regardless of a person's diet. This situation
best illustrates:
a. homeostasis
b. life organizational hierarchy
c. autotrophy
d. evolution - correct answer -a. homeostasis
illustrate life's organizational hierarchy - correct answer -- atom
- molecule
- organelle
- cell
,- tissue
- organ
- organ system
- organism
- population
- community
- ecosystem
- biosphere
atom - correct answer -smallest chemical unit of a pure substance
molecule - correct answer -A group of atoms bonded together
organelle - correct answer -a membrane bound structure that has a specific function within a cell
cell - correct answer -fundamental unit of life, multicellular or unicellular
tissue - correct answer -collection of specialized cells that function in a coordinated fashion
organ - correct answer -structure consisting of tissues organized to interact and carry out specific
functions
organ system - correct answer -organs connected physically or chemically that function together
organism - correct answer -An individual living thing
Population - correct answer -a group of the same species of organisms living in the same place and time
community - correct answer -all populations that occupy the same region
, ecosystem - correct answer -living and nonliving things in an area
biosphere - correct answer -the global ecosystem, the parts of the planet and its atmosphere where life
is possible
which of the following is smaller than an organelle?
a. an organ
b. a molecule
c. a cell
d. a tissue - correct answer -b. a molecule
Autotroph vs Heterotroph - correct answer -Autotrophs are organisms that can produce their own food
from the substances available in their surroundings using light (photosynthesis) or chemical energy
(chemosynthesis). Heterotrophs cannot synthesize their own food and rely on other organisms — both
plants and animals — for nutrition.
because plants extract nutrients from soil and use sunlight as an energy source they are considered to
be - correct answer -autotrophs
decomposers - correct answer -Organisms that break down the dead remains of other organisms
*Evolution through natural selection will occur most rapidly for populations of plants that* - correct
answer -
Domain bacteria - correct answer -- prokaryotic
- not a membrane bound organelle
- genome is located in the nucleoid
- they are generally smaller
- they are unicellular (single-celled)
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