1) which of the following crosses would always result in offspring that only display the
dominant phenotype?
a. tt x tt
b. tt x tt
c. tt x tt
d. tt x tt
e. two of the crosses will always display the dominant phenotype
2) which of the following floral structures are present during the diploid stage of a
flowering plants life cycle?
a. anther
b. ovule
c. sporophyte
d. pollen grain
e. everything but for the pollen grain.
3) dna replication is considered semiconservative because:
a. it will create three new, identical strands when finished.
b. it uses the original strand as a template for replication.
c. it always replicates in the 3 to 5 prime direction.
d. it never replicates in the 5 to 3 prime direction.
4) which of the following statements concerning dietary protein is true?
a. protein should supply the bulk of our dietary calories.
b. it is not possible for vegetarians to have a balanced diet with adequate protein intake.
c. the average american eats about half the recommended protein.
d. dietary protein is digested to nucleic acids, which are used to make dna.
e. growth in children may be delayed or stunted if essential amino acids are not present
in their diets.
5) which organelles contain functioning atp synthetase complexes in their membranes?
a. golgi complexes and lysosomes.
b. mitochondria and chloroplasts.
c. endoplasmic reticulum and vesicles.
d. vacuoles and vesicles.
e. mitochondria and endoplasmic reticulum.
6) in cladistics, _______________ is(are) the primary criterion used to classify
organisms.
a. ecological niche
b. common ancestry
c. mating behavior
d. observable traits
e. all of the above.
7) which of the following disorders is not a x-linked trait?
a. hemophilia
b. muscular dystrophy
c. adrenoleukodystrophy
d. all of these are x-linked disorders
8) the vine in the picture below is displaying
a. negative gravitropism.
b. positive gravitropism.
c. thigmotropism.
d. negative phototropism.
e. positive phototropism.
9) which of the following tissue types will produce root hairs within the zone of
maturation?
a. epidermis
b. cortex
c. endodermis
d. vascular tissue
10) which of the following statements about the insect exoskeleton is not true?
a. the exoskeleton protects insects against predators and drying out.
b. the insect exoskeleton is jointed and movable.
c. the insect exoskeleton grows with the organism.
d. the insect exoskeleton is made of a complex form of carbohydrate called chitin.
e. the insect exoskeleton has muscles attached to it from the inside of the body.
11) the system of flexing and extending muscles makes movement of appendages easy
to understand. but how are some actions possible (sticking out your tongue, beating of
your heart) when these structures have no bone structure with opposing flexors and
extensors in them?
a. one set of muscle cells must therefore be able to both contract and expand.
b. these structures must be empty chambers, and fluids forced into them expand them.
c. since muscle cells can only contract and relax, muscle cells running diagonally or
crosswise amidst the longitudinal muscles must contract and force the long relaxed
muscle cells to elongate.
d. this cannot be explained at present.
12) in the water cycle, evaporated equatorial water that rises and does not immediately
rain back down proceeds to
a. the poles where it causes snow.
b. the poles if it does not encounter mountain ranges, which it usually does.
c. about 60 north or south and then cools and condenses, supporting a band of moist
vegetation.
d. about 30 north or south and then cools and condenses, supporting a band of moist
vegetation.
13) _____ lakes are nutrient rich and tend to have large populations of algae.
a. oligotrophic
b. eutrophic
c. temperate
d. stratified
14) the genus lacerta is composed of a species of lizards that are female and do not
mate. they undergo “endomitosis” where one extra chromosome replication results in a
tetraploid cell before meiosis begins. normal female 2n offspring result without
fertilization. what change(s) from regular meiosis (in preparation for fertilization)
would be required to produce this system?
a. the haploid cell products of meiosis ii fuse.
b. meiosis stops after meiosis i and does not proceed to meiosis ii.
c. cytokinesis does not follow “endomitosis” that results in a tetraploid cell.
d. during anaphase ii, the sister centromeres fail to separate and daughter cells will not
form.
e. during anaphase ii, the daughter chromosomes are non-disjunctive and are all pulled
to one daughter cell.
15) what is the main difference between an open circulatory system and a closed one?
a. an open system will have the blood leave the blood vessels and dump into the
hemocoel while the closed one will retain the blood within the system.
b. an open system will keep the blood within the blood vessels while the closed one will
dump the blood into the hemocoel.
c. an open system will have the blood leave the blood vessels and dump into the lungs
or gills while the closed one will retain the blood within the system.
d. an open system will have the blood leave the blood vessels and dump into the lungs
or gillswhile the closed one will retain the blood within the heomocoel.
e. the blood within a closed circulatory system does not contain hemoglobin.
16) which of the following is (are) an effect(s) of auxin?
a. applied to a woody cutting, auxin causes roots to develop.
b. auxin production by seeds promotes the growth of fruit.
c. trees sprayed with auxin will keep mature fruit from falling to the ground.
d. under the effect of gravity, auxin moves to the lower surface of roots and stems,
causing roots to curve downward and stems to curve upward.
e. all of the choices are effects of auxin.
17) the amphibians’ common receptacle for the urinary, genital, and digestive canals is
the
a. vulva.
b. glottis.
c. cloaca.
d. tympanum.
e. operculum.
18) most animal species possess the necessary features to be classified in which
phylum?
a. mollusca
b. arthropoda
c. chordata
d. echinodermata
e. annelida
19) which of these characteristics is not found in the amphibians?
a. thin moist skin
b. two-chambered heart
c. small inefficient lungs
d. aquatic larvae
e. eggs with gelatinous covering