Biology 189: Exam 1|160 Questions and
Answers
*Chapter 1*
Summarize the five characteristics of life - -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 - -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 - -a. homeostasis
-illustrate life's organizational hierarchy - -- atom
- molecule
- organelle
- cell
- tissue
- organ
- organ system
- organism
- population
- community
- ecosystem
- biosphere
-atom - -smallest chemical unit of a pure substance
-molecule - -A group of atoms bonded together
-organelle - -a membrane bound structure that has a specific function within a cell
, -cell - -fundamental unit of life, multicellular or unicellular
-tissue - -collection of specialized cells that function in a coordinated fashion
-organ - -structure consisting of tissues organized to interact and carry out specific
functions
-organ system - -organs connected physically or chemically that function together
-organism - -An individual living thing
-Population - -a group of the same species of organisms living in the same place and time
-community - -all populations that occupy the same region
-ecosystem - -living and nonliving things in an area
-biosphere - -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 - -b. a molecule
-Autotroph vs Heterotroph - -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 - -autotrophs
-decomposers - -Organisms that break down the dead remains of other organisms
-*Evolution through natural selection will occur most rapidly for populations of plants
that* - -
-Domain bacteria - -- prokaryotic
- not a membrane bound organelle
- genome is located in the nucleoid
- they are generally smaller
- they are unicellular (single-celled)
Answers
*Chapter 1*
Summarize the five characteristics of life - -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 - -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 - -a. homeostasis
-illustrate life's organizational hierarchy - -- atom
- molecule
- organelle
- cell
- tissue
- organ
- organ system
- organism
- population
- community
- ecosystem
- biosphere
-atom - -smallest chemical unit of a pure substance
-molecule - -A group of atoms bonded together
-organelle - -a membrane bound structure that has a specific function within a cell
, -cell - -fundamental unit of life, multicellular or unicellular
-tissue - -collection of specialized cells that function in a coordinated fashion
-organ - -structure consisting of tissues organized to interact and carry out specific
functions
-organ system - -organs connected physically or chemically that function together
-organism - -An individual living thing
-Population - -a group of the same species of organisms living in the same place and time
-community - -all populations that occupy the same region
-ecosystem - -living and nonliving things in an area
-biosphere - -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 - -b. a molecule
-Autotroph vs Heterotroph - -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 - -autotrophs
-decomposers - -Organisms that break down the dead remains of other organisms
-*Evolution through natural selection will occur most rapidly for populations of plants
that* - -
-Domain bacteria - -- prokaryotic
- not a membrane bound organelle
- genome is located in the nucleoid
- they are generally smaller
- they are unicellular (single-celled)
