WorksheetsSteele HS Biology Blitz Category 4
Total questions: 26
Worksheet time: 13mins
Invasive plant species affect the interactions of living and nonliving components of an ecosystem, so the removal of invasive plants is often necessary. The goal of most
plant-control methods is to disrupt or inhibit the function of different plant systems. For example, insects can be used to chew through roots in order to reduce a plant’s ability to absorb water.
Which of these functions would be most immediately affected by a reduction in water uptake by roots?
Disease resistance
Seed dispersal
Sunlight absorption
Photosynthesis
Taq polymerase is an enzyme used in the polymerase chain reaction (PCR) to replicate fragments of DNA. A study published in 1976 examined the properties of Taq polymerase after the enzyme was isolated from Thermus aquaticus, a thermophilic bacterium that lives in the hot springs of Yellowstone National Park. The graph shows one of the results of the study.
Which statement about enzyme activity is best supported by this graph?
An enzyme must be composed of multiple polypeptides, or subunits, to be active.
An enzyme’s rate of activity increases with time until it becomes inactive.
An enzyme functions best under specific temperature conditions.
An enzyme works equally well in bacteria that are adapted to high temperatures and in eukaryotic cells such as human cells.
The picture shows bean-shaped glands called nodes. The clusters of cells in nodes include macrophages that break down viruses and other potentially harmful materials. Nodes also contain cells that produce protein particles capable of capturing harmful materials that flow in tissue fluid through the nodes. Different parts of the body are drained by nodes in different regions of the body.
Which body systems are directly responsible for regulating these nodes and protecting the body from harmful materials in tissue fluid?
Immune and lymphatic systems
Digestive and nervous systems
Endocrine and digestive systems
Circulatory and nervous systems
This diagram demonstrates why the ocean is a large carbon sink.
An increase in the amount of carbon dioxide in the atmosphere can cause atmospheric temperatures to increase. Which statement explains how this could affect the ocean as a carbon sink?
Less atmospheric carbon dioxide would be available to phytoplankton.
Dissolved carbon dioxide gas in the ocean would increase because surface winds would cause a deeper circulation pattern, making more room for the gas.
Less carbon dioxide gas would be contained in the ocean because increasing precipitation would dilute the carbon entering the ocean.
Less carbon dioxide would be dissolved in the ocean because increasing atmospheric temperatures would cause ocean temperatures to increase.
The diagram demonstrates a feedback process involving antidiuretic hormone (ADH). ADH increases the permeability of parts of the nephrons of the kidney, resulting in less water in the urine.
This feedback loop is likely to be activated when —
the body experiences dehydration
blood glucose levels are stable
body temperature drops
the urinary tract is infected
Some foods that are rich in complex carbohydrates can be difficult to digest. Gas often forms as the foods are slowly digested by bacteria in the large intestine. The advertisement is for a nutritional supplement that prevents intestinal gas.
Which of the following represents evidence that could be used to support the claims about this product?
Complex carbohydrates are found in vegetables and grains, which are good sources of fiber, vitamins, antioxidants, and minerals. Vegetables and grains are known to reduce the risk of heart disease.
Some nutritional supplements provide vitamins and minerals that are missing from a person’s diet. These types of nutritional supplements contain important nutrients that reduce the risk of malnutrition.
Consuming enzymes specific for carbohydrate digestion helps the body digest complex carbohydrates more quickly in the stomach and small intestine.
Some nutritional supplements add beneficial bacteria to a person’s diet. These bacteria populate the stomach and prevent carbohydrate digestion.
A student reads this advertisement for a product containing a plant micronutrient that can be added to soil.
Based on this information, the student can conclude that boron is absorbed by plant roots from soil and then —
transported to reproductive tissues by the plant’s shoot system
stored in plant stems until the flowers are pollinated
concentrated in the roots until the plant’s reproductive tissues mature
transported by the phloem to the stomata in leaves, where it attracts pollinators
Which of the following is an example of the endocrine system directly interacting with the nervous system?
The vertebrae protect the spinal cord from injury.
Hormones provide feedback that affects neural processing.
Sensory receptors in bones send signals about body position to the brain.
The brain sends signals that control the speed at which food moves through the intestines.
Recent studies in bone research indicate that using ultrasound on a broken bone can decrease the healing time by 25%. Which of these are the most basic levels of organization involved when a bone heals?
Cells and tissue
Cells and organ system
Organ system and organism
Tissue and organ system
Four common relationships between organisms are listed in the box.
Which statements best describe these relationships?
Relationships 1 and 4 are examples of mutualism.
Relationship 2 is an example of commensalism.
Relationship 3 is an example of parasitism.
Relationships 1 and 2 are examples of commensalism. Relationships 3 and 4 are examples of mutualism.
Relationship 1 is an example of commensalism.
Relationships 2 and 4 are examples of mutualism.
Relationship 3 is an example of predation.
Relationships 1, 2, and 4 are examples of mutualism.
Relationship 3 is an example of parasitism.
A student conducted an investigation to study phototropism in grasses. The only difference between the control group and the experimental group was light conditions. The control group was provided full light, while the experimental group was shaded on one side. The diagrams show the average heights and positions of blades of grass in the investigation.
Which statement best explains why the grass tips of the experimental group bent toward the light?
Water evaporated faster on the side of the plant having full light.
Light sensors in the grass tips stimulated a hormone in the shoot system.
The xylem in the root system absorbed more nutrients from the shaded side.
The side facing the light has a greater chance of absorbing carbon dioxide from the atmosphere.
Photosynthesis and cellular respiration both involve the use and release of gases. Which statement correctly identifies the role of gases in the two processes?
Photosynthesis and cellular respiration both use carbon dioxide and release oxygen.
Photosynthesis and cellular respiration both use oxygen and release carbon dioxide.
Cellular respiration uses oxygen and releases carbon dioxide, while photosynthesis uses carbon dioxide and releases oxygen.
Cellular respiration uses carbon dioxide and releases oxygen, while photosynthesis uses oxygen and releases carbon dioxide.
A student studying interactions between body systems constructs this table. The student plans to fill out the table with phrases that describe an interaction between each pair of systems.
Which of these phrases could be placed in the position marked with an X?
Provides nutrients to kidney cells
Provides nutrients to brain cells
Provides nutrients to nerve cells
Provides nutrients to muscle cells
Students are given data from an investigation that identified some of the chemical elements present in four different samples.
Which sample is most likely DNA?
Sample 1
Sample 2
Sample 3
Sample 4
Which statement explains how producers are dependent upon consumers for their survival?
Consumers supply oxygen for producers to undergo aerobic respiration.
Consumers produce carbon dioxide for producers to use during photosynthesis.
Consumers provide chemical energy needed by producers for cellular respiration.
Consumers make lactic acid that producers use in photosynthesis.
A mutation in which types of cells would only affect the organism and not future generations?
Egg cell and liver cell
Sperm cell and egg cell
Nerve cell and brain cell
Sperm cell and lung cell
Which of these describes a difference between viruses and cells?
Cells contain protein, and viruses contain only carbohydrates.
Viruses have flagella, and cells only have cilia.
Cells reproduce independently, and viruses require a host to reproduce.
Viruses have membranes made of proteins, and cells have membranes made of nucleic acid.
Which list correctly identifies characteristics that protists share with animals?
When mammals get an infection, their internal body temperature often rises by 2 to 3 degrees Celsius. The body gets the energy it needs to react to an infection by –
Increasing the rate of cellular division
Decreasing the rate of glucose movement into the cell
Increasing the rate of cellular respiration in mitochondria
Decreasing the rate at which carbon dioxide is removed from the cell
How do the circulatory system and immune system work together to respond to injury?
Increased blood flow kills healthy cells which prevents infection at the site of injury.
Increased blood flow removes infected cells from the body at the site of injury.
Increased blood flow carries white blood cells to the site of the injury.
Increased blood flow allows for an increase in the exchange of O2 and CO2 at the site of the injury.
The Himalayan rabbit’s habitat has cold, snowy winters and mild summers. The body is typically covered in white fur except for the nose, feet, tail and ears which are covered in black fur.
A scientist shaved an area of white fur on the back of the Himalayan rabbit and placed an ice pack over the shaved area. The shaved area grew black fur.
Which of these best explains why the hair that grew back where the ice pack was placed was black and not white?
The genes for black hair were activated by specific temperatures.
The white hair mutated to black hair as the rabbit’s body temperature decreased.
The coat color changed from white to black with the age of the rabbit.
White hair only grows during certain times of the year.
An advertisement for a health supplement for dogs claims to build lean muscle and strengthen tendons and ligaments, as well as provide energy.
Which two biomolecules must the supplement contain to provide these benefits?
Carbohydrates and lipids
Proteins and carbohydrates
Nucleic acids and carbohydrates
Lipids and nucleic acids
Which part of a DNA molecule is responsible for the direct coding of specific traits in an organism?
The number of hydrogen bonds that hold the strands of DNA together.
The number of carbons in the DNA molecule.
The sequence of nucleotide bases in DNA molecules.
The sequences of phosphates along each DNA strand.
In the 1880s, Louis Pasteur developed a method of weakening viruses. The weakened viruses could be injected into healthy individuals.
How effective is this method in fighting viral diseases?
The immune system develops antibodies in response to the weakened viruses.
The weakened viruses attach to unaffected viruses in the host and interrupt the viral reproductive cycle.
The rate of genetic mutation in the host is decreased due to the introduction of weakened viruses.
Weakened viruses are unable to enter the host organism.
Which of these best demonstrates mutualism between certain types of bacteria and humans?
Intestinal bacteria obtain nutrients from the gut and produce vitamin K used by humans.
Bacteria become resistant to antibacterial medication that humans use for treatment.
Invasive bacteria at an area of injury produce toxins that damage healthy tissues of the human body.
Bacteria in improperly prepared food is consumed by humans, causing food poisoning.
Adaptations that result from natural selection are expected to increase the fitness of an organism. In terms of natural selection, which of the following best describes fitness?
Being able to escape from predators
Being among the strongest organisms in a population
Being able to survive, find a mate, and produce offspring.
Being able to survive long enough to reach the adult stage
