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Which of the following is an example of phenotypic polymorphism in humans?
- the presence or absence of a
- widow's peak
Which of the following is a life history characteristic that would not be associated with big-bang reproduction?
- repeated reproductive events
- over a long life span
It is possible to prepare vesicles from portions of the inner membrane of the mitochondrial components. Which one of the following
processes could still be carried on by this isolated inner membrane?
locate genes using microscopically visible chromosomal features.
Vertebrates and tunicates may seem as different as two animal groups can be, yet they share
the presence of a notochord; a dorsal, hollow nerve cord; and pharyngeal slits.
Which of the following statements best represents the relationships between the light
reactions and the Calvin cycle?
The light reactions provide ATP and NADPH to the Calvin cycle, and the cycle returns ADP, Pi, and NADP+ to the light reactions.
Genetic variation is generated in the ciliate Paramecium when
micronuclei are exchanged in conjugation.
The amniote egg first evolved in which of the following groups?
Which of the following is the correct sequence during alternation of generations in a
If a chromosome lacks certain genes, what has most likely
Phospholipids are well suited to serve as the major
component of the plasma membrane because they _____.
have a water-soluble part and a water-insoluble part
A table listing such items as age, observed number of
organisms alive each year, and life expectancy is known as a(an)
Which statement about natural selection is most correct?
Populations change over time as maladapted individuals pass fewer genes to subsequent generations than do well-adapted individuals.
At which point in the cell cycle do centrosomes begin to move apart to two poles of the cell in a dividing human liver cell?
In ferns, sori are clusters of sporangia, each of which contains many __________ spores.
Which of the following is an important distinction between the measurement of basal metabolic rate (BMR) and standard
metabolic rate (SMR)?
SMRs must be determined at a specific temperature.
Which of the following characteristics of chloroplasts and mitochondria are more similar to prokaryote cells than to eukaryote cells?
enzymes and transport systems of inner membranes and single, circular chromosome
Species transplants are one way of
determining if dispersal is a key factor in limiting distribution.
Flowers are made of modified
The person credited with first recognizing (in the 1860s) that living cells cannot arise spontaneously, but arise only from
previously existing cells, is _____.
Similarity among organisms in anatomical, embryological or
molecular charactersitics resulting from common ancestry is known as:
The transfer of free energy from catabolic pathways to
anabolic pathways is best called
The jaws of vertebrates were derived by the modification
b. one or more gill arches.
An arthropod has all the following characteristics except
Landscape ecology is best described as the study of
related arrays of ecosystems.
A unique feature of fertilization in
angiosperms is that
one sperm fertilizes the egg; another combines with the polar nuclei.
Which of the following occurs in meiosis but not in mitosis?
synapsis, and tetrads align at metaphase plate