1) which of the following features is common among the roundworms as well as the
arthropods?
a. periodically shed their outer covering.
b. radial symmetry.
c. endoskeleton.
d. undergo metamorphosis.
e. segmentation is readily apparent.
2) fossils are considered to belong to the genus homo if which of the following is true?
a. the brain size is 600cc or larger.
b. the jaw and teeth are human like.
c. tool use is evident.
d. all of the choices are characteristics of this group
3) the formation of simple organic monomers, such as sugars, amino acids, and
nucleotide bases, from inorganic molecules is
a. biosynthesis.
b. genetically modified photosynthesis.
c. abiotic synthesis.
d. chemoautotrophic activity.
4) based on this tree, the lineage leading to ________ was the first to diverge from the
other lines.
a. turtles
b. birds
c. dinosaurs
d. mammals
e. crocodilians
5) match the parts of a seed with their origin.
1> seed coat a. integument
2> endosperm b. union of polar nuclei and sperm
3> embryo c. union of sperm and egg
6) the __________ body cavity will contain the heart, lungs and spleen.
a. ventral
b. cranial
c. dorsal
d. abdominal
e. abdominopelvic
7) an earlier classification grouped organisms by whether they inhabited the air, land or
sea. however, the five-kingdoms-of-life and three-domains system divided into
class-order-family-genus-species as described in this chapter is superior because it
a. better represents the origin of features held in common-the unity of life in dna, etc.
b. better reflects the origin of adaptations-the diversity of life for differing
environments.
c. allows the organization of over 900,000 different species.
d. groups organisms based on similarities related to their structure and evolution.
e. all of the choices are correct.
8) in the alternation of generations life cycle of plants, gametes are produced by the
a. sporangia.
b. fruit.
c. gametophyte.
d. homospores.
e. strobili.
9) which of the following is the reason plants wilt if they are watered with a salt
solution?
a. to protect the leaves from full exposure to the salt.
b. an increase in turgor pressure.
c. salt weakens the plant cell walls.
d. loss of water due to the salt solutionresulting in a decrease in turgor pressure.
10) which best describes the first law of thermodynamics?
a. energy is changed from one form to another with a loss of usable energy.
b. energy is not created nor destroyed, but it can change from one energy form to
another.
c. energy can be created from matter or used to produce matter.
d. some useful energy is lost as heat whenever an energy transfer occurs.
e. energy transfers are always 100% efficient in changing energy from one useful form
to another.
11) which of the following pertain to movement of plants?
a. nastic movements
b. thigmotropism
c. phototropism
d. gravitropism
e. all of the choices are correct.
12) how is most carbon dioxide transported in the blood?
a. as gas bubbles of co2, just as in carbonated soft drinks
b. as bicarbonate ions (hco3)
c. on the free hemoglobins since they have lost their oxygen in the tissues
d. as carbon monoxide
e. as carbon compounds and oxygen radicals
13) cell biologists have introduced radioactively labeled carbohydrates, fats and amino
acids to living cells, allowed time for cell metabolism, and then disrupted the cells in a
blender and separated out the various cell organelles from the cytoplasm. they found the
radioactive molecules could soon be detected as part of various cellular compounds,
although the visible cell structures appeared unchanged. this leads us to conclude that
a. these “food” molecules are used only for energy.
b. most cell components are constantly being broken down and rebuilt.
c. radioactivity was transferred from the introduced molecules to the resident stable
molecules.
d. molecules diffuse at random through the cytoplasm and into cell organelles.
e. radioactivity has an unusual role in metabolism of living cells.
14) which of the following statements about keystone species is not true?
a. the extinction of keystone species can lead to other extinctions and a loss of
biodiversity.
b. keystone species are defined as a population subdivided into several small isolated
populations due to habitat fragmentation.
c. examples of keystone species are grizzly bears, bats, beavers and alligators.
d. the numbers of individuals in the keystone species in their respective community
may or may not be excessively high.
15) information gathering from the environment by a vertebrate is aided by which of
the following?
a. paired eyes, ears, and olfactory structures
b. cephalization
c. bilateral symmetry with a vast increase in the number of neurons
d. all of the choices are information gathering aids.
16) what is the correct series of events during parturition?
a. the amnion breaks.
b. the cervix dilates.
c. acth causes the adrenal cortex to release androgens into the bloodstream.
d. prostaglandins and oxytocin are produced.
e. the baby is born and the umbilical cord is cut.
f. the placenta is delivered.
a. c – d – b – a – e – f
b. c – d – a -b – e – f
c. a – d – b – c – e – f
d. c – d – b – f – a – e
e. c – b – f – a – e – d
17) sources of genetic variation in a sexually reproducing population include(s) which
of the following?
a. crossing over in prophase i of meiosis
b. independent assortment in metaphase i of meiosis
c. fertilization
d. all of the choices are sources of genetic variation.
e. none of the choices are sources of genetic variation.
18) proteins in a membrane are:
a. peripheral if they are on the inside surface held in place by the cytoskeleton.
b. integral if they are embedded in the membrane and protrude from both surfaces of
the bilayer.
c. integral if they protrude from only one surface of the bilayer.
d. all of the choices are correct.