1) the germinating corn seed pictured below is displaying
a. negative gravitropism.
b. positive gravitropism.
c. thigmotropism.
d. negative phototropism.
e. positive phototropism.
2) the frequent change in hiv surface proteins is a type of
a. coevolution.
b. parasitism.
c. mutualism.
d. commensalism.
3) identify the major tumor suppressor gene that is more frequently mutated in human
cancers than any other known gene.
a. p53 gene
b. hemoglobin gene
c. ras oncogene
d. p16
e. rb tumor-repressor gene
4) biodiversity in a particular ecosystem
a. is the total number of species in that ecosystem
b. includes the variability of the individual genes
c. impacts the function of the ecosystem in which the species live
d. all of the choices are correct.
5) the subunits from which atp is made are:
a. adp and phosphate.
b. fad and nad+.
c. fad and nadph.
d. adp and fad.
e. adp and nad+.
6) which of the following communication methods would be most effective for a
species that lives in the tropical rainforest and is active at night?
a. chemical
b. visual
c. tactile
d. auditory
7) sympatric speciation in plants, as a result of ________, is well documented.
a. any type of geographic barrier
b. a series of islands off of a mainland
c. polyploidy
d. mountain ranges
8) the type of learning that is associated with an organism solving a problem without
any prior experiences with the situation is
a. operant conditioning.
b. imprinting.
c. associative learning.
d. insight learning.
9) temperate deciduous forests are characterized by
a. dry climates with rainfall averages around 25-75 cm per year.
b. the highest variation in day and night length.
c. the highest amount of organisms living in tree canopy.
d. a growing season that ranges between 140 and 300 days.
e. the richest topsoil horizon.
10) which of the following statements about non-steroid (peptide) hormones is not true?
a. peptide hormones are derived from peptides, proteins, polypeptides, and derivatives
of amino acids.
b. peptide hormones bind to receptors on the cell surface.
c. peptide hormones stimulate the formation cyclic amp inside the cell.
d. peptide hormones must enter the cell in order to have an effect.
e. peptide hormones create an enzyme cascade effect.
11) some bacteria are strict aerobes and others are strict anaerobes. some bacteria,
however, are facultative anaerobes and can live with or without oxygen. if given the
choice of using oxygen or not, which pathwayshould a facultative anaerobe perform?
a. use oxygen since aerobic metabolism provides more atp per molecule of
carbohydrate broken down than anaerobic metabolism.
b. not use oxygen since it is a facultative anaerobe, it doesn’t tolerate oxygen well.
c. use oxygen because aerobic metabolism is easier.
d. it doesn’t matter; both processes will produce the same results.
12) which of the following statements about the rods and cones in the eye is not true?
a. the cones are better able to detect shades of color.
b. the rods are involved in black and white vision.
c. rods and cones work together to detect the full image.
d. rhodopsin is the molecule associated with vision.
e. rods are activated by bright light and cones are better suited to night vision.
13) a female chooses a mate by
a. courtship display rituals.
b. selecting the more aggressive and vigorous males.
c. selecting traits that improve the chances of offspring survival.
d. all of the choices apply.
14) ______ is often referred to as the ‘stress” hormone since it initiates and maintains
seed and bud dormancy.
a. ethylene
b. cytokinins
c. abscisic acid
d. gibberellins
15) a recent study of the marine hawksbill turtles’ stomach contents revealed that
sponges constitute a major portion of their diet. sponge beds are generally protected
from predators by their calcium and silica crystals, but these were found in the turtles’
digestive systems. these protective structures are called
a. amoebocytes.
b. osculum.
c. choanocytes.
d. spicules.
e. spongin.