1) a change in the chromosome number resulting from nondisjunction is called
euploidy.
2) some memories are emotionally charged because the amygdala triggers associations
between fear and sensory information.
3) the iron in a hemoglobin molecule is actually what binds the oxygen.
4) within a mycorrhizal relationship the fungi provide a greater surface area for mineral
and water loss while the plant furnishes the fungi with sugars and amino acids.
5) when nerve impulses pass to the diaphragm, the diaphragm relaxes and exhalation
occurs.
6) in the transcription of dna, remodeling proteins push the histone portion of the
nucleosome aside so that transcription may begin.
7) the carrying capacity of the environment for a species is determined by
a. the reproductive rate of the organism.
b. the number of organisms of that species.
c. the state and national wildlife laws pertaining to that species.
d. the age distribution of that species.
e. the limited availability of renewable resources in the environment and the
environmental resistance to the biotic potential of the organism.
8) how did the scientist marcello malpighi, in 1679, discover the role of phloem?
a. he observed aphids and cut off their beaks.
b. he was an early researcher on the cause of maple sap flow in producing syrup.
c. he observed the effects of girdling a tree below the level of the majority of leaves.
d. he used radioactive tracers to measure the flow of sap between two distances over
time.
e. he observed the uptake of ink into the stem of celery.
9) halophiles
a. require a high salt environment.
b. have a chloride pump that pumps chloride into the cell.
c. may be chemoheterotrophs or photosynthetic.
d. all of the above choices are correct.
e. require a high temperature in order to survive
10) which of the following terms best describes a conceptual scheme in science that is
strongly supported, has not yet been found incorrect, and is based on the results of
many observations?
a. a scientific model
b. an experiment
c. descriptive research
d. a scientific theory or principle
e. experimental results
11) which body system plays a role in influencing behavior?
a. nervous and endocrine
b. endocrine and urinary
c. muscular and neural
d. respiratory and urinary
e. none of these systems will influence behavior.
12) which phrase does not describe one of the functions of proteins of the plasma
membrane?
a. forming a channel through the membrane
b. initiating the replication of the genetic material
c. binding to a substance to carry it through the membrane
d. acting as a receptor for substances external to the cell
e. increasing the rate of a chemical reaction
incorrect
13) as the heart contracts it forces the blood out with a great deal of force. damage to
which blood vessel will result in a forceful spraying of blood?
a. artery
b. vein
c. capillary
d. arteriole
e. damage to any of the blood vessels will result in a forceful spray of blood.
14) the evolutionary trends in primates include all of the following except
a. mobile limbs.
b. stereoscopic vision.
c. a rounded, protruding face.
d. large, complex brain.
e. reduced reproductive rate.
15) the use of wheat, corn, rice and other crops derived from wild ancestors is an
example of the _______ value of biodiversity.
a. agricultural
b. medicinal
c. consumptive use
d. climatic regulation
16) in pea plants, the gene for round seed (r) is dominant, and wrinkled seeds (r) are
recessive. the endosperm of the pea is also either starchy, a dominant gene (s), or waxy
(s). what can be said of a fully heterozygous, dihybrid cross?
a. it is impossible to secure offspring that are homozygous for both dominant genes.
b. it is impossible to secure offspring that are homozygous for both recessive genes.
c. it is impossible to secure offspring that are homozygous for one dominant gene such
as round seed and homozygous recessive for the other recessive waxy gene.
d. all of these choices are impossible combinations in a dihybrid cross.
e. all of these choices are possible combinations in a dihybrid cross.
17) we are very familiar with two things found in large woody plants, wood and bark.
the wood is essentially made of ________ and the bark is essentially made of
________.
a. xylem; phloem and cork
b. vascular tissue; epidermal tissue
c. the cortex; the epidermis
d. pith; collenchyma
18) ______ is when one species splits into two species or when one species transforms
into another over time.
a. reproductive isolation
b. convergent evolution
c. the founder effect
d. speciation
e. both reproductive isolationand speciation are correct.
19) water follows sodium ions out of the renal filtrate in the tubules and into blood by
means of
a. tubular reabsorption.
b. tubular secretion.
c. osmosis.
d. glomerular filtration.