Q 1/50
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When the skin comes in contact with an irritant, receptors in the skin send signals to the spinal cord. The signal is then sent to the brain for processing, and the individual begins to scratch the affected area.
Which two systems are most likely interacting when a person experiences itching caused by a skin irritant?
29
Circulatory and excretory
Digestive and muscular
Integumentary and nervous
Respiratory and lymphatic

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Q1
When the skin comes in contact with an irritant, receptors in the skin send signals to the spinal cord. The signal is then sent to the brain for processing, and the individual begins to scratch the affected area.
Which two systems are most likely interacting when a person experiences itching caused by a skin irritant?
Circulatory and excretory
Digestive and muscular
Integumentary and nervous
Respiratory and lymphatic
30s
B.10.A
Q2
During the cell cycle, proteins called cyclins bind to enzymes that send signals for the cell to progress through stages of cell replication. At the end of this cycle, the cyclins degrade to prevent further signaling for the cell to divide.
Uncontrolled production of cyclins will most likely result in —
the immediate death of the cell
the formation of haploid cells
the formation of tumors
the transfer of cyclins to other cells
30s
B.5.C
Q3
An illustration of how a particular DNA mutation will most likely affect the polypeptide produced is shown.
What type of mutation is illustrated?
Insertion
Deletion
Substitution
Translocation
30s
B.6.E
Q4
Farmers spray pesticides on their plants to protect the plants from being eaten by insects. Some individual insects have a genetic mutation that makes them resistant to the toxins in the pesticides.
Which statement best describes how only a few resistant individuals resulted in the pesticide becoming ineffective?
The resistant insects eat the contaminated surface and leave the rest for others.
The resistant insects are able to survive to reproduce and create a population that is also resistant.
The resistant insects change the toxin on the plants, making it safe for others.
The resistant insects grow larger and eat less of the plants.
30s
B.7.C
Q5
The defenses of two flightless birds that live in different habitats are shown.
How do the wings of the Gentoo penguin and the legs of the common ostrich provide an advantage in their habitat?
Allows them to control their body temperature
Allows them to escape from predators
Allows them to find prey
Allows them to be camouflaged in their environments
30s
B.12.B
Q6
Which property is shared by the cells of all living things?
The cells have chromosomes that are located inside a membrane-bound nucleus.
The cells contain DNA composed of adenine, thymine, guanine, and cytosine.
The cells are surrounded by a phospholipid bilayer and a cell wall made of cellulose.
The cells rely on mitochondria to carry out aerobic cellular respiration.
30s
B.6.B
Q7
The flow of energy in a grassland ecosystem is shown.
Based on the diagram, which two populations best represent trophic levels that receive the LEAST amount of the total energy provided to the ecosystem by the grass?
Rabbits and mice
Toads and spiders
Crickets and sparrows
Hognose snakes and owls
30s
B.12.C
Q8
The life cycle of a frog is illustrated in the diagram.
Which statement best explains how the cell cycle is important to the life cycle of the frog?
It prevents overproduction of frog offspring.
It enables frogs to produce tadpoles that are clones.
It allows frogs to grow, develop, and reproduce.
It ensures the best adapted frogs survive and pass on traits to offspring.
30s
B.5.A
Q9
Which graphic organizer best compares the energy inputs and outputs of cellular respiration and photosynthesis?
30s
B.9.B
Q10
Overfishing is causing the decline of fish populations, such as Eastern Atlantic bluefin tuna in the Mediterranean. Eastern Atlantic bluefin tuna are caught faster than they can reproduce.
Which statement describes the most likely effect that overfishing will have on this ecosystem?
Overfishing makes the ecosystem more stable by increasing competition for limited resources.
Overfishing decreases the stability of the ecosystem by disrupting food chains.
Overfishing has no effect on ecosystem’s stability because it affects one species out of many.
Overfishing increases ecosystem stability by allowing prey populations to overproduce.
30s
B.12.E
Q11
A segment of DNA is shown in the diagram.
Which of these identifies the part of the DNA segment labeled X?
Deoxyribose
Hydrogen bond
Nucleotide
Phosphate group
30s
B.6.A
Q12
Which statements best compare the function of an ATP molecule to a DNA molecule?
ATP provides energy for chemical reactions in the cell.
DNA carries and transmits the genetic information of organisms.
ATP acts as a structural sugar in the cell walls of plants.
DNA provides energy for chemical reactions in the cell.
ATP serves as a biological catalyst that speeds up the rate of chemical reactions.
DNA acts as a structural sugar in the cell walls of plants.
ATP carries and transmits the genetic information of organisms.
DNA serves as a biological catalyst that speeds up the rate of chemical reactions.
30s
B.9.A
Q13
A cladogram of five species is shown.
Based on the cladogram, the ancestral species most likely had —
the ability to purr
a vertebral column and hair
sharp teeth and retractable claws
a vertebral column
30s
B.7.A
Q14
Students created note cards comparing characteristics of eukaryotic and prokaryotic cells. Which set of note cards most accurately compares these cells?
30s
B.4.A
Q15
The Mexican long-nosed bat roosts in Big Bend National Park in West Texas. The bat feeds on nectar and pollen and hovers while it feeds. Additionally, its tongue can extend up to eight centimeters.
The features of Mexican long-nosed bats are evidence of natural selection because the features are adaptations that —
help individuals outcompete other individuals for food resources to increase survival and reproductive success
show that most DNA mutations are necessary and advantageous but do not increase survival or reproductive success
lead to an increase in predation by other species of animals
are the result of intentional breeding
30s
B.7.E