Levels of Organization
What level of organization would a starfish's stomach be considered?
An organ
What is the purpose of the stoma in homeostasis in plants?
It controls gas exchange.
What type of model is a computer program predicting the effects of a change in the shape of a bacterium?
a simulation
Which cell organelle controls movement of materials in and out of the cell?
The cell membrane.
Which organelle stores genetic information for the cell?
The nucleus.
What would be the next levels above and below tissue in the levels of organization?
A level below would be the cells, and a level above would be the organ.
What type of model is a 3D model of a bacterial cell showing major structural features
It is a physical model.
A flow chart is made to illustrate process of ATP production in bacteria. What type of model is this?
A conceptual model
What is the function of the mitochondria in the cell?
It produces energy for cellular functions.
Name which part of the Earth system that a worm and decaying wood belong to. What about moisture?
They belong to the biosphere.
and moisture belongs to the hydrosphere.
Name something that would be considered a tradeoff of an artificial knee?
Possible answers: It is heavier than the natural knee. It is expensive.
What part of the Earth system do minerals belong to? and air pockets?
Minerals belong to the geosphere. and air pockets would be part of the atmosphere.
Some fish can live in both fresh and salt water. What would be expected of a fish moving from one to the other?
It is going to produce smaller amounts of more concentrated urine.
Describe an experiment in which a scientist could determine whether a jellyfish can maintain constant salt levels in their cells under different external conditions. What would be the variables?
Measure external and internal levels of salt in normal salt water then place them in different containers with lower levels of salt. Measure their internal salt levels. Are they able to maintain homeostasis?
Besides cost and effectiveness of a new treatment that kills cancer cells, what is another criterion that should be considered when evaluating this new technology?
The side effects of the treatment should be considered. The benefits of the treatment have to outweigh the costs.
A study shows that a certain nano vaccine boosts the immune system in mice. What would be the most logical next step in the development process?
More testing and studies to replicate the results in animals.
An engineer is developing a prosthetic limb. The current device costs $10,000, but the cost of the item can not exceed $8,000. How could the engineer approach this problem using the engineering design process?
The engineer should reconsider the materials being used, the location of the manufacturer and any other elements of the design that could be changed to reduce the cost of the limb.
Name two things that would reduce the amount of input for photosynthesis.
1. Reduce the amount of sunlight that is available to the plant.
2. Cover half of the plant's stomata.
If a person has pneumonia, how is this likely to affect the functioning of the circulatory system?
If your alveoli cannot transport oxygen in the blood, then the blood that is delivered to the heart will not have enough oxygen in it. When this happens, the heart cells will not function properly.
Tell how human cells and the ebola virus interact in a person sick with ebola.
The virus is not able to make copies of itself on its own but needs the human cell to reproduce.
The specialized respiratory mucosa cells in the trachea produce mucous to keep the trachea moist. What is this an example of?
This is an example of cells working together to maintain homeostasis.
What experiment could a biologist perform to test whether a plant that typically survives in very wet climates could regulate the size of its stoma in climates where there are changes in water availability?
The biologist could water different plants with different amount of water and measure the size of the stoma.
What are 2 risks of cochlear implants?
1. An infection caused by the implantation of the device.
2. dizziness caused from signaling from the device
Besides cost effectiveness, cost, and lifespan, what is another criteria that should be considered when manufacturing a prosthetic device? and why?
The material that it is made from. Reasons: You don't want it to be too heavy to operate. Comfortability and versatility.
Argue whether the ebola virus is living or nonliving (choose 1) and give two reasons to support your answer.
Living: It can respond to the environment by injecting its instructions into another cell. 2. It requires an energy source in the form of a human being in which it lives.
Nonliving: It cannot reproduce itself without the machinery of another cell. 2. They are not actually made of cells.