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- Multiple ChoicePlease save your changes before editing any questions.
Which of these best explains the next level of organization in this model?
protein
mitochondria
muscle cells
atom
- Multiple ChoicePlease save your changes before editing any questions.
Scientists are developing a new class of vaccines, known as nanovaccines. A study found evidence that nanovaccines boost the immune response in mice. The scientists reported their initial findings to other scientists. What is the most logical next step in the development process?
determine the best way to ship large quantities of the vaccine
replicate the nanovaccine results in further studies
collect data on the impact of vaccines in the developing world
produce larger quantities of vaccine for use on people
- Multiple ChoicePlease save your changes before editing any questions.
In the trachea there is a layer of epithelial cells that produce mucus. The function of the mucus is to keep the trachea moist which catches debris and bacteria going to the lungs. What is this an example of?
Cells working to maintain homeostasis.
Cells working to produce energy for the body.
Organs working together to maintain homeostasis.
Organs working together to produce energy for the body.
- Multiple ChoicePlease save your changes before editing any questions.
Engineers are working to develop a new kind of artificial knee, which is used to replace damaged knees. Which of these would be considered a trade off of the artificial knee?
The artificial knee reduces pain in people who have the knee.
The artificial knee functions better than the knee that it replaces.
The new artificial knee is heavier than previous artificial knees to improve its lifespan.
The artificial knee is more resistant to wear and tear than other artificial knees.
- Multiple ChoicePlease save your changes before editing any questions.
Most starfish turn their cardiac stomach inside out to eat captured prey. The cardiac stomach digests the food outside of the body and, when complete, returns to the inside of the body. Which term applies to the cardiac stomach?
cell
organ
system
tissue
- Multiple ChoicePlease save your changes before editing any questions.
An engineer is developing a new prosthetic leg to help patients who have lost limbs to walk. The current device design will cost $10,000 to manufacture, but the cost of the item cannot exceed $8,000. How should the engineer approach this problem using the engineering design process?
The engineer should change the cost constraint
The engineer should move forward in the design process
The engineer should trade off some of the safety and reliability of the design to reduce costs
The engineer should reconsider the materials, location of manufacture, and simplify any parts of the design to reduce costs
- Multiple ChoicePlease save your changes before editing any questions.
A biologist discovers a new species of plant that grows in very humid climates. She hypothesizes that this species would not be able to regulate the size of its stoma (the pores in the leaf of the plant that allow oxygen out) when there are changes in humidity. Which experiment can she perform to best test this hypothesis?
She waters different plants with different volumes of water and measures the diameter of stoma in each leaf.
She trims a different amount of roots from each plant and measures the amount of glucose produced by each plant.
She grows the plant with various levels of humidity and measures the amount of oxygen produced by each plant.
She places leaves from the plant in solutions containing different amounts of salt and measures the time it takes the leaves to dry out.
- Multiple ChoicePlease save your changes before editing any questions.
This model shows some of the inputs and outputs for the respiratory and circulatory systems.
Which statement explains why the arrows between the atmosphere and the respiratory system are different sizes?
The atmosphere contains more carbon dioxide than oxygen
The respiratory system uses more carbon dioxide than oxygen
The muscular system uses oxygen and produces carbon dioxide
The respiratory system moves gases from the atmosphere to the muscular system
- Multiple ChoicePlease save your changes before editing any questions.
Different parts of the cell system are responsible for different functions in the maintenance of homeostasis.
What is the function of the ribosomes?
produces cellular proteins
produces energy for cellular functions
stores genetic information for the cell
controls movement of materials in and out of the cell
- Multiple ChoicePlease save your changes before editing any questions.
Cochlear implants are devices that are often implanted in patients who have trouble hearing. Choose all correct sentences that describe a risk of cochlear implants.
Signaling from the device can cause dizziness
Implantation of the device can cause infections
Patients can hear other people speaking more accurately
Patients can better determine the direction that sound comes from
Cochlear implants have become more affordable in the last few years
- Multiple ChoicePlease save your changes before editing any questions.
Which steps will reduce the amount of an input to photosynthesis? Choose all the correct answers.
cover half of the plant’s stomata
place the plant in a low-oxygen environment
increase the carbon dioxide levels of the plant
reduce the amount of sugar that the plant is receiving
reduce the amount of sunlight that is available to the plant
- Multiple ChoicePlease save your changes before editing any questions.
Most individuals in need of a prosthetic limb in low income countries do not have access to one. Researchers studying these areas are looking at different options for prosthetic limbs. The information in the table shows some of the costs, benefits, and tradeoffs of prosthetic options available for patients. What is the best option?
Type A
Type B
Type C
- Multiple ChoicePlease save your changes before editing any questions.
Viruses are considered ________.
living
non-living
- Multiple ChoicePlease save your changes before editing any questions.
A researcher is studying how pneumonia affects alveoli, small sacs in the lungs responsible for gas exchange. If an individual has a pneumonia infection, explain how this would likely affect the functioning of the circulatory system.
Circulatory system will not get the energy it needs
Circulatory system will not be able to exchange the gases in the blood that it needs
Circulatory system will not be able to pump blood through the heart anymore
Circulatory system will not get the input it needs from the nervous system
- Multiple ChoicePlease save your changes before editing any questions.
Different parts of the cell system are responsible for different functions in the maintenance of homeostasis. What is the function of the mitochondria?
produces cellular proteins
produces energy for cellular functions
stores genetic information for the cell
controls movement of materials in and out of the cell