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40 POINTS!!!!!

Please write the Experimental and the Null Hypothesis for the following scenerio...
August 1, 2013
Light that Moves and Molds Gels
Pitt research team demonstrates gels that can be moved, controlled by light

PITTSBURGH—Some animals—like the octopus and cuttlefish—transform their shape based on environment, fending off attackers or threats in the wild. For decades, researchers have worked toward mimicking similar biological responses in non-living organisms, as it would have significant implications in the medical arena.
Now, researchers at the University of Pittsburgh have demonstrated such a biomimetic response using hydrogels—a material that constitutes most contact lenses and microfluidic or fluid-controlled technologies. Their study, published in Advanced Functional Materials, is the first to show that these gels can be both reconfigured and controlled by light, undergoing self-sustained motion—a uniquely biomimetic behavior.

Together with Olga Kuksenok, research associate professor in the Swanson School, Balazs experimented with a newer type of hydrogel containing spirobenzopyran molecules. Such materials had been previously shown to form distinct 2-D patterns on initially flat surfaces when introduced to varying displays of light and are hydrophilic in the dark but become hydrophobic under blue light illumination. Therefore, Balazs and Kuksenok anticipated that light could be a useful stimulus for tailoring the gel’s shape.

Using computer modeling, the Pitt team demonstrated that the gels “ran away” when exposed to the light, exhibiting direct, sustained motion. The team also factored in heat—combining the light and local variations in temperature to further control the samples’ motions. Controlling a material with light and temperature could be applicable, Balazs said, in terms of regulating the movement of a microscopic “conveyor belt” or “elevator” in a microfluidic device.


Experimental Hypothesis:
Null Hypothesis:

Answer:

PITTSBURGH—Some animals—like the octopus and cuttlefish—transform their shape based on environment, fending off attackers or threats in the wild. For decades, researchers have worked toward mimicking similar biological responses in non-living organisms, as it would have significant implications in the medical arena.

Now, researchers at the University of Pittsburgh have demonstrated such a biomimetic response using hydrogels—a material that constitutes most contact lenses and microfluidic or fluid-controlled technologies. Their study, published in Advanced Functional Materials, is the first to show that these gels can be both reconfigured and controlled by light, undergoing self-sustained motion—a uniquely biomimetic behavior.

“Imagine an apartment with a particular arrangement of rooms all in one location,” said lead author Anna Balazs, Pitt Distinguished Professor of Chemical and Petroleum Engineering in the Swanson School of Engineering. “Now, consider the possibility of being able to shine a particular configuration of lights on this structure and thereby completely changing not only the entire layout, but also the location of the apartment. This is what we’ve demonstrated with hydrogels.”

Together with Olga Kuksenok, research associate professor in the Swanson School, Balazs experimented with a newer type of hydrogel containing spirobenzopyran molecules. Such materials had been previously shown to form distinct 2-D patterns on initially flat surfaces when introduced to varying displays of light and are hydrophilic (“liking” water) in the dark but become hydrophobic (“disliking” water) under blue light illumination. Therefore, Balazs and Kuksenok anticipated that light could be a useful stimulus for tailoring the gel’s shape.

Using computer modeling, the Pitt team demonstrated that the gels “ran away” when exposed to the light, exhibiting direct, sustained motion. The team also factored in heat—combining the light and local variations in temperature to further control the samples’ motions. Controlling a material with light and temperature could be applicable, Balazs said, in terms of regulating the movement of a microscopic “conveyor belt” or “elevator” in a microfluidic device.

“This theoretical modeling points toward a new way

Which variable responds to the changes of the independent variable? A-independent B-causation C-dependent D-Controlled

I need help with this y’all .

When are temperature differences between urban and rural land greatest? Why?

What is an analogous structure?
A. a structure that has the same form but
different functions like an arm, fin, and wing
B. a structure that has the same function but
different forms like the wing of a bee and wing of
a bat
C. a structure that used to serve a purpose but
does not have a purpose in modern species
D. a structure that is similar in all developing
embryos

Approximately what amount of the Earth's surface area is covered by water?

A) two thirds
B) four seventh
C) three fourths
D) one eighth ​

differentiate between larva of culex mosquito and that of anopheles mosquito on the basis of feeding habit

To be considered living, an organism must ____.
A.
develop but not grow
B.
never develop
C.
develop as it grows
D.
grow but not develop
Reset

help pls


Many populations exhibit the following growth curve.

Which statement(s) below accurately are describing the growth as shown on the graph. NOTE: There is MORE THAN ONE correct answer. Choose ALL that apply.

Select 3 correct answer(s)
Question 5 options:

Phase B of the graph is showing a population that has reached its carrying capacity.


When both phases of the graph are looked at together, it shows logistical growth of a population after growing exponentially and reaching its carrying capacity .


Phase B of the graph is showing exponential growth only.


The entire graph shows two organisms competing for space.


Phase A of the graph is showing exponential growth only.

Alien recipe virtual Arkansas

Knowing the half-life of carbon-14 enables scientists to

Plzz help ASAP

QUESTION 3
3.1. A scientist designed an experiment to investigate the water holding capacity
of sand, loam and clay soil. A soil sample of each soil type was places in
funnels lined with filter paper. 100 cm of water was added to all three
samples at exactly the same time. The filtrates were collected in measuring
cylinders. The results are shown in the table below.
Time (minutes) - Sand Volume of fitrate (om)
on
Sand
2
10
5.
0
4
20
10
0
6
35
20
0
8
50
35
5
10
65
45
20
75
55
12
40
75
60
14
75
60
65
16
L
3.1.1 Make a neat labelled diagram of the apparatus used to set up the
SAND sample
(5)
3.1.2 Identify:
(a) the independent variable
(b) the dependent variable
(2)
3.1.3 Using the results in the table, formulate a conclusion for this
experiment
(2)
(2)
3.1.4 Explain how the results obtained led to this conclusion
31.5 Which type of soil will be most suitable for gardening? Motivate your
answer.
(3)​

Which type of biomolecules are made up of fatty acids?

a. carbohydrates

b. proteins

c. lipids

d. nucleic acids

Cells are made of organelles, specialized structures that each perform specific functions that help the cell maintain homeostasis. This is much like the body systems work together to help the body maintain homeostasis. Consider the function of the nervous system. Which organelle is most similar in function?

The cells of a grasshopper contain DNA. The grasshopper could be alive because it displays which sign of life?
A.response to the environment
B.
information system
C.
complex chemical activities
D.
reproduction

HELP!!!
In your own words, discuss the importance of enzymes within a living system and include what the function of an enzyme is. Using your best grammar, write 2-4 sentences.

Which of the following is NOT a characteristic of all living things?

2
If you are unsure of the accuracy of your data set. What is one way that you can feel more confident?
A Collect more data through further experimentation
B Take data from other experimenters
Extrapolate data based on what you think should happen
Ask a friend to read over it

Figure 1.20 shows part of a fungus. The photograph
was taken with an electron microscope.
Name the structure labelled A.

circle the term that does not belong in each of the following groups, and briefly explain why it doesn't belong rock, cells, metabolism, growth

At the start of the lab, you will test known samples in order to see what positive and negative test results look
like.
Pre-Lab Question 4: Why is it important to know what a negative test result looks like?
I

I will give branliest
5. Read the sentence, find the error and rewrite it.

Trypsin secreted by salivary glands digests the carbohydrates and it is also

called as Salivary amylase
​

2. What is the pH of a very acidic solution?
a:5
b:10
c: 1
d:14​

What are forest fires, temperature fluctuations, and floods all examples of?

In the early 1900s toxic substances such as ammonia (NH3) and sulfur dioxide (SO2) were used in
1
refrigerators as

what happens if an organelle stops working

From memory List the characteristics of life

Which of the following is considered a balance within an organism *
a. metabolism
b.adaption
c. homeostasis
d. none of these

PLS HELP QUICK IM DOING A TWST

Identify two examples of foods that contain high amounts of
each of the following macromolecules: carbohydrates, lipids, and proteins.

SpongeBob loves to garden and wants to grow lots of pink flowers for his pal Sandy.
special Flower Power fertilirer to see if will help plants produce more flowers. He plants two plants of
the same size in separate containers with the same amount of potting soil. He places one plant in a sunny
window and waters it every day with fertilized water. He places the other plant on a shelf in a closet and
waters it with plain water every other day.

What should SpongeBob do to test the effectiveness of Flower Power fertilizer? Write an experiment.

Water is considered a polar molecule. What does this mean?