1.
1 How do cells in the ovary detect a hormone from
the brain?
(1) The brain sends a nerve impulse to the ovary.
(2) White blood cells bring the hormone to the
ovary.
(3) Receptor molecules on the cells of the ovary
bind with the hormone.
(4) Vacuoles within the ovary bind with the
hormone.
Hint
Half-n-half Clue
2.
2 Single-celled organisms are able to maintain
internal stability because they
(1) have multiple organ systems
(2) work with other cells
(3) contain structures that perform life functions
(4) carry out photosynthesis to produce food
Half-n-half Clue
3.
3 A similarity between humans and many other
multicellular animals is that they
(1) occupy the same niche in most food webs
(2) are composed of organ systems
(3) have the same DNA sequences
(4) carry out autotrophic nutrition
Half-n-half Clue
4.
4 In order to enter cells and be useful to the body,
starch must be
(1) absorbed through the skin
(2) broken down into fats and water
(3) digested into simple sugars
(4) converted to carbon dioxide and ATP
Half-n-half Clue
5.
5 The increase of certain types of gases in the
atmosphere has contributed to the problem of
global warming. All these gases are
(1) biotic factors
(2) abiotic factors
(3) organic factors
(4) endangered factors
Half-n-half Clue
6.
6 Several goldfish were kept in a small aquarium for
several years. The fish grew to be approximately
6 centimeters long in the first year, and after that,
growth in length stopped. These fish were later
transferred to a large pond. In the pond, the
goldfish grew much larger, reaching lengths of
around 25 centimeters. Which statement provides
the best explanation for the increased growth of
the fish in the pond?
(1) Chemicals present in the pond increased the
amount of DNA in the fish, causing the
growth increase.
(2) The expression of genetic information in the
fish was influenced by their surroundings.
(3) The fish expressed and passed on only those
characteristics that enabled them to survive
in the new environment.
(4) The size of the fish depended only on their
food supply and not on their DNA.
Half-n-half Clue
7.
7 Autotrophs might survive when heterotrophs
cannot, because autotrophs are able to
(1) reproduce asexually
(2) become dormant
(3) exist without respiration
(4) make their own food
Half-n-half Clue
8.
8 The inability of sperm cells to move normally
could prevent the production of offspring by
interfering with
(1) meiosis (3) fertilization
(2) mitosis (4) differentiation
Half-n-half Clue
9.
9 Which type of pathogenic microbe causes AIDS?
(1) a bacterium
(2) a virus
(3) a multicellular fungus
(4) a single-celled algae
Half-n-half Clue
10.
10 The diagram below represents a technique used to produce carrots.
Which reproductive process determines the traits present in the cluster of cells?
(1) meiosis (3) fertilization
(2) mitosis (4) differentiation
Half-n-half Clue
11.
11 The diagram below represents a scientific technique in use today.
Scientists have used this technique to
(1) produce hormones for human use at a lower cost than other methods
(2) produce pathogens that are able to live in humans
(3) clone human cells with desired characteristics
(4) eliminate the need for laboratory production of medicines for humans
Half-n-half Clue
12.
12 DNA is able to control cellular activities most
directly by regulating the process of
(1) meiotic division (3) active transport
(2) protein synthesis (4) selective breeding
Half-n-half Clue
13.
13 Which statement describes an effect of natural
selection on a species?
(1) It favors the survival of certain members
of the species and results in a change in
the proportion of individuals with highly
adaptive traits.
(2) It provides feedback mechanisms for members
of a species and results in a change in the
proportion of individuals with homeostatic
controls.
(3) It leads to reproduction with other species,
increasing the number of different adaptations.
(4) It increases competition between populations
that occupy different niches, increasing the
chance of extinction of the less-adapted
species.
Half-n-half Clue
14.
14 Maple leaf beetles and willow leaf beetles are
named for the type of tree where they live and
reproduce. They look identical to each other
when observed, but experiments have shown
that willow beetles would starve before eating
maple leaves. This is an example of specialization
that would directly reduce
(1) variation (3) adaptation
(2) competition (4) replication
Half-n-half Clue
15.
15 Which event would most likely cause a change in
a genetic sequence in an organism?
(1) eating certain foods high in saturated fats
(2) strenuous physical activity
(3) exposure to radiation
(4) a sudden exposure to cooler temperatures
Half-n-half Clue
