Which frog species would be most likely to interbreed?
Peeper and leopard
Wood and pickerel
Bullfrog and green
Tree and pickerel
What is the correct sequence for plant cell mitosis?
A, B, D, C
C, B, A, D
B, A, D, C
D, C, B, A
According to the graph, the highest metabolic rate is found in —
amphibians
reptiles
birds
mammals
A student wrote this description of a cell after looking at it under a microscope. Which type of cell was the student most likely describing?
Animal cell
Fungus cell
Bacterium cell
Plant cell
In 1893, a one-million acre area of the Grand Canyon National Forest Reserve was home to an estimated 3,000 Rocky Mountain mule deer. Cattle, sheep, and horses also roamed the reserve. In 1906, government hunters killed off hundreds of mountain lions, coyotes, and bobcats when the area was set aside as the Grand Canyon National Game Preserve. The number of Rocky Mountain mule deer rose to over 100,000 by 1923. What was the approximate density of the mule deer in 1923?
1 for every acre
1 for every 10 acres
1 for every 100 acres
1 for every 1,000 acres
A biology class wanted to develop a research project to predict the effects of a new highway on wildflower species found in the Piedmont region of Virginia. The class could best conduct such a study by sampling flowers found in the highway construction area —
one year before highway construction begins
both before and after highway construction is completed
immediately after highway construction is finished
during the time highway construction is taking place
The graph shows the amount of pollutants removed by trees. During October, the trees were able to remove the greatest amount of —
The reduction of the chromosome number during meiosis is most important for —
preventing the nucleus from becoming larger with each cell division
maintaining the chromosome number during sexual reproduction
keeping the amount of DNA in the cell at a minimum level
allowing the growth of the cell without increasing the DNA content
A biology student collected pine needles from four different species of trees. She then made diagrams showing the number and actual length of needles in a bundle and the common and scientific name of each species. Use her diagram above to help you answer the following question. These four different pine trees are not classified in the same —
order
species
genus
phylum
In the human body, the circulatory system transports and delivers substances. Within the cell, which organelle performs a similar function?
Nucleus
Golgi apparatus
Mitochondrion
Endoplasmic reticulum
Wild cats such as cheetahs, lions, and tigers experience decreased genetic diversity as their populations decline and become fragmented due to habitat destruction. Decreased genetic diversity leads to populations with —
disproportionate gender ratios
decreased disease resistance
increased immigration rates
increased birthrates
The body of which of these organisms has the least specialized organization?
Jellyfish
Sea urchin
Starfish
Sponge
Two plant species found in a dry region of the western United States exhibit vastly different abilities to survive. Species A has very slow stem growth and few leaves but is very abundant. Species B has rapid stem growth and many leaves but is very rare. Which hypothesis is most likely supported by this information?
Leaf shape may give species B an advantage over species A.
Flower size and color may give species B an advantage over species A.
Reduced root growth may give species A an advantage over species B.
Reduced stem growth may give species A an advantage over species B.
In 1910, Thomas Morgan discovered traits linked to sex chromosomes in the fruit fly. The Punnett square above shows the cross between red-eyed females and white-eyed males. Fruit flies usually have red eyes. If a female and male offspring from the cross shown above are allowed to mate, what would the offspring probably look like?
2 red-eyed females; 2 white-eyed males
2 red-eyed females; 1 red-eyed male, 1 white-eyed male
1 red-eyed female and 1 white-eyed female; 2 red-eyed males
2 white-eyed females; 1 white-eyed male and 1 red-eyed male
A symbiotic relationship in which one organism benefits while one organism is harmed is known as —
antagonism
commensalism
mutualism
parasitism
Which of these statements is supported by the data shown in the table?
Most kingdoms are made up of prokaryotic cells.
All cells have nuclei for control of cell functions.
Eukaryotic cells vary in covering and in food production.
Each of the kingdoms has different organelles for metabolism.
The picture shows a coverslip correctly being lowered onto a slide. This method is used because it —
reduces the possibility of air bubbles on the slide
prevents the escape of microorganisms found in the water
allows microorganisms to move freely in the water
prevents the coverslip from moving
Tall land plants have requirements different from those of aquatic plants. Which of these must the tall land plants have that aquatic plants do not need?
Photosynthetic abilities
Organelles for respiration
A means of reproduction
Thick-celled walls
Which of the following is an example of a genetically engineered organism?
A plant that received external DNA to produce natural insecticides
A new plant variety created by cross-pollination
Seedless fruits resulting from grafting of one plant onto another
A plant that naturally possesses medicinal properties
These feet belong to different birds. Three of the birds spend most of their time on the ground, while one bird rarely walks on the ground. Which foot belongs to the bird that is best adapted for grasping branches?
A chart of human chromosome pairs is called a karyotype. What information is revealed in the karyotype above?
The sex
The age
Trisomy
Gene dominance
A microorganism which releases water into its environment to regulate its salinity during osmosis is undergoing a process that is similar to a human being who releases moisture on a hot day. This process that helps keep both the microorganism and the human body fluids in balance is known as —
homeostasis
cell division
heredity
mutation
Henry’s project is on porcupine populations in Virginia. He would like to use the phone book to help him make contacts. His most reliable contacts would probably be found by looking in the phone book under —
travel agencies
newspapers
state agencies
civil engineers
Scientists found the fossilized remains of a canine’s jaw and leg. What information must first be obtained before the scientists can place the fossils in the ancestral time line of the dog?
The rest of the skeleton
The continent where the fossils were found
The age of the fossils
The population trends for the species
Increased evaporation
Decreased photosynthesis
Increased respiration
Decreased temperatures
According to the graph, addition of the enzyme amylase causes the reaction to —
slow down
speed up
give off heat
take in heat
A flower with this shape would use what type of pollinator?
Wind
Mammal
Rain
Hummingbird
According to this chart, the insects that are most closely related are the —
springtails and bristletails
dragonflies and proturans
springtails and proturans
bristletails and mayflies
Which of these segments could be used to correctly complete the DNA molecule in the diagram above?
The nonpoisonous eastern scarlet snake has colored bands that closely resemble the poisonous coral snake. This selective adaptation provides the eastern scarlet snake with —
increased breeding opportunities
a method of avoiding predation
the ability to attract prey
increased feeding opportunities
In pea plants, tall plants are dominant to short plants. If two heterozygous tall plants are crossed, what percent of the offspring will probably be short?
75%
50%
25%
0%
The processes of photosynthesis and respiration can be thought of as a cycle because —
one is used only by plants and the other is used only by animals
both give off oxygen to be used by animals
the products of one are used as the raw materials of the other
they both have the same purpose
All the organisms shown above belong to the Phylum Chordata. The structural similarity in the organisms suggests that —
the humerus is attached to the skeleton by immovable joints
only animals that walk on 4 legs need the humerus
the humerus is the same size in all chordates
chordates have common ancestors
People long ago believed that maggots came from meat. In the late 1600s, Francesco Redi made the hypothesis that maggots came from flies rather than from meat. Which of these experimental designs could be used to test Redi’s hypothesis?
Which level of this food pyramid represents the largest biomass?
Bass
Minnows
Copepods
Algae
What is the major function of the valves found in human veins?
Preventing movement of blood clots
Reducing the back flow of blood
Adding oxygen to blood plasma
Slowing the red blood cells
The above diagram shows the process of osmosis. Only the water molecules could enter the cell because water molecules —
have more energy than the protein molecules
are smaller than the protein molecules
are more numerous than the protein molecules
contain more hydrogen atoms than the protein molecules
Cleaner fish feed off the algae, fungi, and other microorganisms that are found on larger fish. Other species of fish, which look like the cleaners, are able to approach the larger fish and remove large bites of flesh. If the look-alike populations outnumber the cleaner fish, the —
microorganisms on large fish would decrease
cleaner populations would increase
behavior of large fish would change
cleaners and mimics would interbreed
The 14 different species of finches in the Galapagos Islands originated from a single ancestral species. What is it about these islands that is responsible for the diversity of finch species?
The islands are made of volcanic peaks.
Each island has different food sources.
Each island has a different climate.
The islands are clustered near each other.
According to the table, which graph below illustrates the calories used for 1 hour of jogging followed by 2 hours of walking?
According to this table, a codon AGC is the code for which amino acid?
Cysteine (Cys)
Leucine (Leu)
Serine (Ser)
Tyrosine (Tyr)
According to this simplified water cycle, the process of transpiration is the process that —
causes photosynthesis in plants
releases water vapor from plants
speeds the evaporation of water
increases the rate of the water cycle
Which of these is capable of moving quickly in response to its environment?
Which sentence best states the importance of using control groups?
Control groups allow comparison between subjects receiving a treatment and those receiving no treatment.
Control groups eliminate the need for large sample sizes, reducing the number of measurements needed.
Control groups eliminate the need for statistical tests and simplify calculations.
Control groups provide a method by which statistical variability can be reduced.
The respiration system of frogs differs from mammals because frogs —
have lungs at hatching and develop gills for life in the water
hatch with gills and develop lungs as they mature
have gills throughout their life cycle
breathe only through their skin
The hypothesis best supported by this graph is that these beetles are most active when the area is —
free from predators
coolest with some sunlight
wettest from dew
richest in oxygen supplies
Which order of diagrams would show primary succession in an area that had never before been occupied by living organisms?
A, C, B, D
C, A, B, D
D, B, C, A
B, A, C, D
Which of these statements best summarizes the cell theory?
Cells contain a nucleus and other parts.
Cells come in different shapes and sizes.
Cells can be seen through a microscope.
Cells are the building blocks of living things.
Which of these functions most like the “brain” of a cell?