1) both t3 and t4 are produced in the thyroid and are responsible for increasing the
metabolic rate of specific organs in the body.
2) it is estimated that an average of two or three cross-overs occur per human
chromosome.
3) platelets will release prothrombin activator at the site of an injury to initiate the
clotting sequence.
4) glycolysis will yield a net of 2 atp only during aerobic respiration.
5) the dna base sequence of the mitochondrial cytochrome oxidase gene has been used
in addition to the biological species concept to identify species.
6) the endocrine system produces hormones in the body and it can be manipulated to
cause an individual to change their behavior.
7) the outer annual rings where transport occurs is called heartwood.
8) the first line of defense against invading microorganisms is nonspecific.
9) viruses and chemical exposure can cause mutations in proto-oncogenes which can
lead to cancer.
10) only the ldc’s will be experiencing overpopulation growth in the near future.
11) by the end of the eighth week of development, all organ systems are developed in
the embryo.
12) organisms produced as a result of mitosis exhibit a great deal of genetic variation.
13) which force pushes water into the xylem as osmosis moves water into the root?
a. water stress
b. atmospheric pressure
c. root pressure
d. guttation
e. transpiration
14) which is the correct order of hormone secretion in response to inflammation?
a. the hypothalamus stimulates the anterior pituitary to produce acth which causes the
adrenal cortex to secrete cortisol.
b. the hypothalamus stimulates the anterior pituitary to produce acth which causes the
adrenal cortex to secrete aldosterone.
c. the anterior pituitary stimulates the hypothalamus to produce acth which causes the
adrenal cortex to secrete cortisol.
d. the hypothalamus stimulates the anterior pituitary to produce anh which causes the
adrenal cortex to secrete cortisol.
e. the hypothalamus stimulates the anterior pituitary to produce anh which causes the
adrenal cortex to secrete aldosterone.
15) which of the following statements about behavior is not true?
a. innate behavior is usually inherited.
b. innate behavior is triggered by a stimulus.
c. fixed action patterns are sometimes subject to modification by learning.
d. animals with simple nervous systems tend to respond to a stimulus with an innate
behavior.
e. all behaviors can be explained as fixed action patterns.
16) what type of tissue lines body cavities and covers body surfaces?
a. muscle tissue
b. nervous tissue
c. epithelial tissue
d. connective tissue
17) which of these is the best description of a virus?
a. a noncellular living organism
b. one of the smallest bacteria known
c. a member of the kingdom virusae
d. a cell at the boundary between living and nonliving things
e. chemical complexes of rna or dna protected by protein shell
18) study the life cycle diagram. label b is the ________ life cycle.
a. lysogenic
b. sexual
c. lytic
d. alternation of generations
19) the meristems that arise from the apical meristem include all of the following
except
a. protoderm.
b. ground meristem.
c. epidermis.
d. procambrium.
20) which of these descriptions is associated with the luteal phase of the uterine cycle?
a. low fsh, high estrogen, developing follicle, increase in uterine lining
b. high lh, high estrogen, developing follicle, uterine lining breakdown
c. decrease in lh, increase in progesterone, corpus luteum present, secretory uterine
lining
d. decrease in lh, decrease in progesterone, corpus luteum present, secretory uterine
lining
e. increase in lh, increase in progesterone, corpus luteum present, endometrium released
21) a very rapid kind of communication that works at a distance and in the dark is
a. chemical communication.
b. auditory communication.
c. tactile communication.
d. visual communication.
22) all of the following are functions of connective tissue except to
a. line body cavities and cover surfaces.
b. bind and support body parts.
c. store energy as fat.
d. fill spaces.
e. produce blood cells.
23) the maximum rate of natural increase of a population that occurs under ideal
conditions is the
a. population growth.
b. biotic potential.
c. environmental resistance.
d. carrying capacity.
e. density-independent population.
incorrect
24) which of the following features would disqualify a plant from being classified as a
bryophyte?
a. nonvascular tissues.
b. gametophyte is the dominant stage of the life cycle.
c. presence of flagellated sperm.
d. ability to reproduce sexually and asexually.
e. none of these features would disqualify a plant from being classified as a bryophyte.
25) which of the following secondary metabolites are used by humans as medicines and
also have the ability to block dna & rna synthesis in insects?
a. alkaloids
b. cyanogenic glycosides
c. tannins
d. proteinase inhibitors
26) point mutations
a. are due to a change in one dna nucleotide.
b. may change a specific codon.
c. can cause a genetic disease such as sickle cell disease that is due to a base change that
codes for valine rather than glutamate.
d. all of the choices are correct.
27) which kind of t cell is most important in the removal of cancer cells or virally
infected cells from the body?
a. helper t cells
b. cytotoxic t cells
c. suppressor t cells
d. memory t cells
28) in some organisms, mitosis occurs without cytokinesis. this results in:
a. cell death
b. a multinucleated cell
c. cells arrested in the g0 phase
d. cells with no nucleus
e. uncontrolled cell division
29) whittaker’s classification included kingdom monera, which included all prokaryotes.
why is this classification obsolete?
a. based on fossil evidence, this group has been divided into three newly named
kingdoms.
b. this kingdom now includes more organisms, so the name has been changed.
c. the prokaryotes, which were included in this kingdom, are now included in protista.
d. based on molecular data, monera has been divided into the two distinct domains,
archaea and bacteria.
30) which list of traits is characteristic of the ecdysozoans?
a. periodically shed their outer covering, non-segmented body plan and pseudocoelom
on some, contain an exoskeleton and undergo metamorphosis.
b. periodically shed their outer covering, non-segmented body plan and contain a layer
of jellylike fluid called mesoglea, contain an exoskeleton and undergo metamorphosis.
c. periodically shed their outer covering, segmented body plan and pseudocoelom on
some, contain an endoskeleton and undergo metamorphosis.
d. none of the these are correct.
31) protist reproduction
a. is always asexual fission.
b. is always sexual with the adult haploid.
c. is always sexual with the adult diploid.
d. is always sexual with alternation of haploid and diploid generations.
e. may be asexual or any of these sexual cycles.