Compared to a person who is physically unfit, a person who is fit
Answer
pumps a smaller volume of blood with each heart beat
takes longer to reach a maximum heart rate
delivers the same amount of oxygen to the circulatory system with each heart beat
requires more oxygen for the same amount of muscle contraction
is more likely to skip heart beats
Question 13
Question
Both cyclic and noncyclic photophosphorylation
Answer
require H2O
generate NADP
generate oxygen
generate PGAL
generate ATP
Question 14
Question
All of the following reactions involve membrane transport by passive or active transport processes except the
Answer
large intestine
postsynaptic membranes of a neuron
loop of Henle
alveolus
urethra
Question 15
Question
Which of the following is a characteristic that differentiates the domains Archae and Bacteria? Of the two domains,
Answer
only members of Archaea have a nuclear envelope
only member of Archaea have a circular chromosome
only member of Bacteria have peptidoglycans in their cell walls
only members of Bacteria have membrane enclosed organelles
only members of Bacteria have plasma membranes with lipids
Question 16
Question
All of the following are true about energy in an ecosystem except
Answer
energy flows in one direction: from producers to primary consumers, to secondary consumers, to tertiary consumers
most of the energy transferred out of one trophic level is lost before passing into the next higher trophic level
the ultimate source of most energy entering an ecosystem is the sun
heat generated by organisms represents a loss of energy to the ecosystem
energy is recycled in an ecosystem
Question 17
Question
In the biogeochemical cycle for carbon, carbon passes from inorganic to organic form through the process of
Answer
ammonification
cellular respiration
decay
photosynthesis
transpiration
Question 18
Question
Growth that stops when an organism becomes an adult is called
Answer
asexual
heterotrophic
embryonic
determinant
eukaryotic
Question 19
Question
During which phase of the cell cycle do chromosomes replicate?
Answer
anaphase
telophase
metaphase
prophase
interphase
Question 20
Question
Which of the following processes produces pyruvate?
Answer
glycolysis
oxidative phosphorylation
Krebs cycle
alcohol fermentation
lactic acid fermentation
Question 21
Question
In which of the following areas of the brain do speech, conscious thinking, and control of skeletal muscles occur?
Answer
cerebellum
medulla oblongata
optic chiasma
corpus callosum
cerebral cortex
Question 22
Question
All of the following products form as a result of a condensation or dehydration reaction except
Answer
proteins
disaccharides
polysaccharides
steroids
triglycerides
Question 23
Question
Which of the following events is believed to be the earliest step toward the origin of a living cell?
Answer
the development of RNA like molecules with enzymatic functions
the appearance of oxygen in the atmosphere
the development of photosynthesis
the development of respiration
the development of DNA in protected pools of water
Question 24
Question
Cellular activities that occur during the G1, G2, and M checkpoints control whether or not subsequent phases of the cell cycle will be completed. These checkpoint activities do not control cell division in
Answer
fetal cells
liver cells
cancer cells
nerve cells
embryonic stem cells
Question 25
Question
A researcher is observing a cell through a microscope. She determines that it is a plant cell because she observes a
Answer
mitochondrion
lysosome
centriole
central vacuole
nucleus
Question 26
Question
Which of the following would most likely provide examples of meiotic cell divisions?
Answer
cross section of muscle tissue
cross section of an anther
longitudinal section of a shoot tip
endosperm of a dormant seed
cross section of a leaf
Question 27
Question
All of the following occur during photosynthesis except
Answer
light absorption occurs in the thylakoid membranes
oxygen is generated during photolysis
CO2 concentrates inside the thylakoid
ATP is generated as protons move from inside the thylakoid to the stroma
glucose is produced in the stroma
Question 28
Question
The amount of energy lost during the transfer from one trophic level of a pyramid of energy to the next higher trophic level is, on average, about
Answer
90%
75%
60%
50%
25%
Question 29
Question
The structure of the seed and seedling that stores food for the embryo and seedling is called the
Answer
apical meristem
plumule
hypoctoyl
cotyledon
coleptile
Question 30
Question
All of the following provide evidence for the support of evolution except
Answer
Many shrubs in Southern California and South Africa possess thick, shiny leaves and are well adapted to fire, characteristics well suited to their Mediterranean type habit, yet the plants of Southern California and South Africa are not closely related
Closely related species share higher percentages of DNA than species more distantly related
Tails and gill arches appear during the development of human embryos
Whales do not have hind legs, but small, nonfunctional bones that resemble leg and foot bones are present
Acquired characteristics, such as the dwarf-like appearance in bonsai that results when trees are closely pruned, can be passed on to offspring
Question 31
Question
Which of the following process convert NADH to NAD+
Answer
glycolysis and Krebs cycle
glycolysis and alcohol fermentation
Krebs cycle and alcohol fermentatioin
alcohol fermentation, lactic acid fermentation, and oxidative phosphorylation
Krebs cycle and oxidative phosphorylation
Question 32
Question
When water evaporates form the surface of a pond, what happens to the remaining liquid water?
Answer
The surface water cools
The surface water warms
The surface water temperature remains unchanged
The amount of energy stored in water molecules remaining in the pond increases