1) in spite of hundreds of millions of dollars spent on insecticides targeted at pest
control for agricultural and medical purposes, man has been unable to drive any to
extinction. on the other hand, the extinction of many species of birds, fishes, plants, and
insects species have occurred as a result of
a. hunting.
b. farming.
c. disease.
d. habitat destruction.
e. scientific collecting.
2) what is the correct sequence for the development of a eudicot embryo?
a. globular stage
b. heart stage
c. proembryo stage
d. mature embryo
e. zygote forms
f. torpedo stage
a. e – c – a – b – f – d
b. e – b – c – a – f – d
c. d – e – a – b – f – c
d. e – c – a – b – f – d
3) which of the followingcircumstances would cause exponential growth to move into a
logistic growth phase?
a. a reduction in the number of females within the population.
b. a large increase in the population over three generations.
c. the introduction of a non-native predator into the environment.
d. habitat alteration resulting in the conversion of 1200 acres of forests into agricultural
fields and housing developments.
e. all of these would cause exponential growth to move into logistic growth.
4) what geographic region does the “replacement model” propose that modern humans
arose in?
a. africa
b. asia
c. europe
d. africa, asia and europe simultaneously
e. none of these choices.
5) in what kind of classic mendelian cross would you expect to find a ratio of 9:3:3:1
among the f2 offspring?
a. monohybrid cross
b. dihybrid cross
c. testcross
d. none of the choices is correct.
6) _______ is responsible for receiving, interpreting, and producing a response to
stimuli.
a. muscle tissue
b. nervous tissue
c. epithelial tissue
d. connective tissue
7) the human heart is composed of
a. muscle fibers called myocardium.
b. an outer membranous sac called the pericardium.
c. endocardium.
d. all of the choices are correct.
e. smooth muscle fibers.
8) when a moss spore lands on an appropriate site, it germinates into the first stage of
the gametophyte called a(n)
a. antheridium.
b. rhizoid.
c. archegonium.
d. protonema.
e. thallus.
9) the reduced reproductive rate in primate evolution involves
a. a reduction in the number of offspring.
b. extended life spans.
c. lengthy gestation periods with one birth at a time.
d. all of the choices are correct.
10) what are the main features of melanocytes?
a. melanocytes are found in the dermis and they produce melanin when exposed to uv
light. the melanin is then distributed to epidermal cells.
b. melanocytes are found in the epidermis and they produce melanin when exposed to
uv light. the melanin is then distributed to epidermal cells.
c. melanocytes are found in the epidermis and they produce melanin when exposed to
uv light. the melanin is then distributed to dermal cells.
d. melanocytes are found in the hypodermis and they produce melanin when exposed to
uv light. the melanin is then distributed to epidermal cells.
11) identify the species that is not classified as a pteridophyte.
a. marchantia
b. equisetum
c. hart’s tongue
d. psilotum
12) which organelles serve as the energy centers for most protists?
a. mitochondria and plastids
b. chloroplasts and golgi bodies
c. mitochondria and endoplasmic reticulum
d. mitochondria and nucleus
13) early biologists referred to animals as simple” and advanced,” but now it is more
accurate to use the following terms:
a. allopatric” and sympatric,” since the species is most important.
b. “generalists” and specialists,” since this is how biologists classify characters.
c. simple” and complex,” since anatomy terms are more exact.
d. evolved” and un-evolved,” since everything ties together with evolution.
e. primitive” and derived,” since some early forms became very complex and some
evolved forms are derived from them but lost characters and are simple.
14) which of the following is an example of a negative feedback mechanism in regards
to hormone regulation?
a. adh is released from the pituitary causing water to be reabsorbed in the kidneys.
b. a baby suckles in order to stimulate milk production.
c. the uterine contractions during labor stimulate oxytocin production.
d. all of these are examples of a negative feedback mechanism.
e. none of these are examples of a negative feedback mechanism.
15) all of the following factors will keep a population from growing at its biotic
potential except
a. limited supply of food and water.
b. lack of availability of space.
c. abundance of predators.
d. prevalence of disease or parasites.
e. successful reproduction of its members.
16) the neural tube of vertebrates develops during morphogenesis of the nervous system
by the
a. folding of ectoderm tissue.
b. migration of mesoderm cells.
c. fusion of ectoderm and mesoderm.
d. contraction of the endoderm away from the mesoderm.
e. extension of endoderm into a thin spinal column.
17) angiosperms have two separate gametophytes because
a. this is normal for alternation of generations.
b. one can survive and fertilize without the need for external water.
c. the microgametophyte is haploid and the megagametophyte is diploid.
d. these two structures allow fertilization without the need for external water.
e. this is normal for all sexually reproducing plants, where sperm are produced by
microgametophytes and eggs by megagametophytes.
18) a major chemical that regulates the fluidity of animal cell membranes by stiffening
the membrane at higher temperatures and preventing the membrane from freezing at
lower temperature is:
a. cholesterol.
b. lipid in nature.
c. a steroid.
d all of the choices are correct.
19) chemical cycling may involve which of the following?
a. a reservoir unavailable to producers
b. an exchange pool as a source from which organisms can acquire chemicals
c. a biotic community in which chemicals move through food chains
d. a geological component, in which chemicals move through the soil or the air
e. all of the choices are correct.