What does "d" represent in the figure showing vessels and organs of the lymphatic system?
The thymus gland
What are the structures in plants that are responsible for taking in carbon dioxide?
the leaves
What two stru
...
What does "d" represent in the figure showing vessels and organs of the lymphatic system?
The thymus gland
What are the structures in plants that are responsible for taking in carbon dioxide?
the leaves
What two structures function in gas exchange?
stomata and lenticels
Which of the following is a service provided by fungi for human benefit?
antibiotics
What correctly describes the movements of actin and myosin fibers?
When ADP and P come off myosin, the crossbridges move the actin filaments to shorten the muscle fiber
What does "a" represent in the figure of the anatomy of the human brain?
The cerebrum
Which of the following would be considered a type of loose connective tissue?
Adipose
What does "b" represent in the figure of the amniotic egg?
amnion
What is true of the offspring that results from breeding two closely related but separate species?
sterile
What is a shared characteristic between gymnosperms and angiosperms?
Pollen is carried by the wind for pollination
What does "c" represent in the figure showing vessels and organs of the lymphatic system?
The tonsils
What is the site of B-cell production and maturation?
The red bone marrow
What is the model of speciation where evolution has long periods of no change followed by brief periods of rapid change?
punctuated equilibrium model
What are the factors that affect population size where the percentage of individuals killed remains the same regardless of population size?
Density-independent factors
Each of the following is one of the body's long-term response to stress except _ (blank) _.
An increase in blood glucose levels
Antigens produced by pathogens are _ (blank) _ antigens; those produced by the body are _ (blank) _ antigens.
foreign, self
The cell walls of fungi contain a large amount of _ (blank) _.
chitin
What is the correct order of least to most dominant sporophyte generation?
moss, fern, gymnosperm, angiosperm
_ (blank) _ stimulates the liver to break down glycogen to glucose and to use fat and protein over glucose as energy sources
Glucagon
What does "a" represent in the figure of the human urinary system?
The kidney
Which of the following structures would you study to learn more about the Pax6 gene in an organism?
the eye
_ (blank) _ occurs when the windward side of a coastal mountain range gets more rain than the leeward side.
The rain shadow effect
Which of the following would not be considered a density-dependent factor controlling population size?
Drought
Which type of muscle is not striated and involuntary?
Smooth
When are dinosaurs thought to have gone extinct?
at the end of the Cretaceous
The presence of _ (blank) _ in high concentrations in the urine would indicate that an individual is diabetic.
Glucose
Monocots can be used for human benefit in all of the following ways except _ (blank) _.
medicines
What portion of the plant is located at the shoot tip?
the terminal bud
Which of the following statements about differential gene expression is true?
It might change leg length between species
What are the broadest divisions on the geologic timescale?
eras
What type of hormones enter the cell or nucleus where they bind to receptors?
Steroid hormones
Which of the following is not a type of distribution pattern found in organisms?
Equilibrium
Which of these is NOT a density-dependent factor which controls population size?
Fire
Which ecosystem with fertile soil has been mainly converted into agricultural farmlands for human use?
Temperate grasslands
Which of the following best describes the evolution of bacteria?
the evolutionary species concept
What is Sphagnum, which has nonliving cells that can absorb moisture and can be used in gardening?
moss
What is the portion of the gymnosperm which gives rise to the egg-producing gametophyte?
megaspore
What two body systems control and regulate homeostasis in the human body?
Nervous and endocrine
Which of the following statements is true of both the nervous system and the endocrine system?
They both use a negative feedback mechanism
What lymphatic tissue is located in the intestinal walls?
The Peyer patches
Which of the following is not an adaptation of animals living in the arctic tundra?
Polar bears change their fur coat color from white to brown (with the seasons)
Which of the following is not a function of the neuroglia?
They help neurons divide
Steroid hormones can be produced by _ (blank) _.
The ovaries
Which of the following is true about skeletal muscles?
They work in antagonistic pairs
Cells found in tissue that cause the surrounding capillaries to dilate are called _ (blank) _.
Mast cells
What does "C" represent in the figure showing the endocrine system glands and organs?
The thyroid gland
Which of the following statements is true of the sporophyte generation, but not the gametophyte generation?
Egg and sperm are produced through meiosis
The presence of _ (blank) _ in the urine is an early indicator that tubular secretion is not functioning correctly.
Uric acid
How far back do fossils from the Burgess Shale date?
540 million years ago
What are the tissues of a leaf, from the upper surface to the lower surface?
epidermis, palisade mesophyll, spongy mesophyll, epidermis
What type of animals have their body cavity incompletely lined with mesoderm?
pseudocoelomates
What is the second way substances are removed from the blood and added to the tubular fluid?
Tubular secretion
Population size is thought to level off at the _ (blank) _ of an environment.
Carrying capacity
What does "d" represent in the figure of the amniotic egg?
chorion
Which ecosystem is shown in the shaded areas of this global map?
Coniferous forest
Aquatic ecosystems are classified according to various criteria, including all of the following except _ (blank) _.
Amount of rainfall it receives
Hypersecretion of _ (blank) _ causes Cushing syndrome.
The adrenal cortex
Which of the following types of tissue is composed of stratified squamous epithelium?
Epidermis
_ (blank) _ are bone-forming cells
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