1) which statement is not true about dna replication in eukaryotes?
a. replication of the entire genome takes about ten minutes.
b. a replication fork occurs at each growing point of the replicating chromosome(s).
c. eukaryotes have many different chromosomes, with replication occurring in each at
the same time.
d. replication occurs at the rate of about 500-5000 base pairs per minute.
e multiple sites of replication are present on each chromosome.
2) altruistic behaviors between closely related animals
a. reduce fighting between species.
b. increase the inclusive fitness of the altruist.
c. increase the life-time reproductive success of the altruist.
d. force individuals to cooperate with one another and thereby increase mating and
population growth.
3) which of the following does not represent homeostasis?
a. sensors detect co2 levels in the blood and trigger an increase or decrease in the rate of
breathing.
b. when body temperature drops, you shiver to generate heat; when your body heats up,
you sweat and the evaporation cools you.
c. feelings of hunger and then fullness affect the length of time and quantity of food you
eat, keeping your weight near a ‘set point.”
d. energy is captured by plants, then transferred to consumers and decomposers, and
eventually lost as heat.
e. cells adjusting the openings on the bottom of leaves respond to differences in water
stress in order to maintain moisture inside the leaf.
incorrect
4) a woman with a beard most likely has a malfunctioning
a. pancreas.
b. pituitary.
c. adrenal cortex.
d. adrenal medulla.
e. thyroid.
5) what factors are evaluated before a cell is allowed to proceed through the g1
checkpoint?
a. growth signals
b. availability of nutrients
c. the integrity of cellular dna
d. all of the above
e. none of these
6) when an egg erupts from a follicle, the chamber that remains and secretes hormones
is the
a. oocyte.
b. stroma.
c. corpus luteum.
d. primary follicle.
e. graffian follicle.
7) the organ of corti consists of the
a. hammer, anvil, and stirrup.
b. eardrum, round window, and oval window.
c. hair cells and tectorial membrane.
d. saccule, utricle, and cochlea.
e. cochlea and auditory nerve.
8) natural killer (nk) cells that destroy virus-infected cells and cancer cells are
a. suppressor t cells (ts).
b. large, granular lymphocytes.
c. neutrophils.
d. eosinophils.
9) which statement is not true about stomata?
a. as guard cells become turgid, the stomates open.
b. there are two guard cells around each stomate.
c. guard cells take up potassium ions and water enters the guard cells.
d. the blue light component of sunlight is a signal that can cause stomata to close.
e. stomates open and close on a daily basis, even if kept in the dark, on a circadian
rhythm.
incorrect
10) which of the following statements is not true about the germinated pollen grain?
a. the generative cell produces two sperm.
b. the pollen tube forms in the style.
c. the tube cell produces the pollen tube.
d. there are two sperm nuclei that move down the pollen tube to the micropyle.
e. fertilization occurs when the pollen grain germinates.
11) which two species are believed to have evolved from homo ergaster?
a. homo erectus & homo floresiensis
b. homo erectus & homo rudolfensis
c. homo rudolfensis & homo floresiensis
d. homo habilis & cro magnon man
12) the particulate theory of inheritance
a. preceded mendel’s research by a century.
b. was proposed by mendel.
c. is based on particles or hereditary units we now call genes.
d. all of the choices are correct.
e. two of the above.
13) evolution of plants was marked by which of the following events?
a. nourishment of a multicellular embryo within the body of the female plant
b. the development of vascular tissues to conduct water and solutes throughout the body
of the plant
c. seed production
d. flowers produced
e. all of the choices are correct.
14) to prepare a microscope slide of mitosis, where would one most likely find
examples of cell division in a plant?
a. near the root tip
b. in a tree trunk, near the center
c. anywhere in the mesophyll of a leaf
d. at the center of a root, back from the tip
15) the function of endosperm is to
a. form the seedling.
b. develop into the fruit.
c. provide water to the embryo.
d. provide nutrients to the embryo.
e. provide a protective coating for the embryo.
16) if a person is bitten by a highly venomous snake and receives a dose of venom
sufficient to kill several people, that person does not have the time to build up his
immunity over the next week to neutralize the venom. however, hospitals carry
“antivenin” made from injecting horses with small-to-larger dosages of snake venom,
and then harvesting the antibodies from the horse plasma. this is an example of
a. passive immunity.
b. active immunity.
c. developing an inflammatory response to increase the igg production.
d. receiving high levels of complement.
e. receiving high levels of interferon.
17) a certain species of butterfly varies in color from white to dark blue. the birds found
in the same area feed on the white or lightly colored butterflies, leaving butterflies that
are darkly colored. this may result in what type of selection?
a. stabilizing selection
b. disruptive selection
c. directional selection
incorrect
18) if the atomic number of an element is 6 and the atomic mass is 12.01, how many
protons are there in the nucleus?
a. 12
b. 6
c. 24
d. 52