An experiment was designed to investigate the effect of caffeine on the rate of the
heartbeat of fruit flies. Two populations of fruit flies were grown in a lab. Both
populations were raised drinking the same type of water and the same type of food.
Both populations were exposed to the same amount of light and regulated
temperature at 20 degrees Celsius. The fruit flies' heartbeats were then monitored
at two hour intervals. The fruit flies of population one were given caffeine five
minutes before their heartbeat was checked. The fruit flies of population two
were not given any caffeine.



what is the control variable
what is the expirimental group
what is the independent variable
Name a controlled variable or constant
was quantitive or qualitative data collected ​

Answers

Answer 1
Control - The ones not given caffeine
Experimental - The ones given caffeine
Independent - Addition of caffeine
Constant - Light
Data - Quantitive

Related Questions

Why did Owens and Darwins have quarrels and stopped being friends

Answers

Answer:

Explanation:

probably because they misunderstood eachother

and they can't stand each other again

They had different ideas and theories on the same topics, many described them as “bitter enemies “

Which of the following is an intrusive igneous body?
O A. Stock
O B. Stope
O c. Magma Chamber
O D. Aphanite

Answers

Answer:

D. Aphanite

Explanation:

A.P.E.X

An invasive igneous body is aphanite. Thus, the correct option is D.

What are Aphanite rocks?

Aphanite's are igneous rocks that were formed by rapid cooling in a volcanic or hypabyssal setting and are so finely grained that their individual mineral crystals cannot be seen with the unaided eye.

Very fine-grained, crystalline fabrics called aphanitic minerals are created when a magma solidifies in reaction to an exceptionally rapid loss of heat and dissolved gases. They are characterized by grains that are too small to be recognized without a petrological microscope.

Large crystals are known to be present in certain specific igneous rocks. The crystals in this type of rock are approximately the same size. Compared to aphanitic rock, which is known to have rocks with finer grain sizes.

So, the correct option is D.

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A diet lacking macronutrients leads to health problems, whereas a diet lacking micronutrients
does not
True or false

Answers

Answer:

Micronutrient deficiencies form an important global health issue, with malnutrition affecting key development outcomes including poor physical and mental development in children

so i think its true

A diet lacking macronutrients leads to health problems, whereas a diet lacking micronutrients. Thus, the given statement is true.

What is Micronutrient?

Micronutrient deficiencies form an important global health issue, with malnutrition affecting key development outcomes including poor physical and mental development in children.This type of diet comprises of macronutrients and micronutrients in which the former is responsible for provision of energy to the body.

A diet that is rich in fruit but lacking protein is a diet which is lacking in nutrients that will help hair, skin, and nails to grow. Correct answer: C The essential nutrients for hair,s kin and nails are protein, because hair and nails are made primarily of a protein called keratin, zinc, calcium, magnesium.This means that in order t support growth of the hair, nails and skin we should consume lean meat, chicken, lentils.

Therefore, A diet lacking macronutrients leads to health problems, whereas a diet lacking micronutrients. Thus, the given statement is true.

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give the name for the material that will fit into the secondary or regulatory site of an allosteric enzyme.

Answers

Answer:

Explanation:

Allosteric Enzymes Enzymes sometimes act as their own regulators. Such enzymes are known as allosteric enzymes. One such enzyme is aspartate transcarbamoylase (also known as aspartate carbamoyltransferase),

How is DNA used as evidence for evolution?

Answers

Answer:

Hope this helps!!!!!! I tried my best to answer!

Darwin proposed that evolution could be explained by the differential survival of organisms following their naturally occurring variation—a process he termed "natural selection." According to this view, the offspring of organisms differ from one another and from their parents in ways that are heritable, which happen because of the change in DNA!  

Explanation:

Answer:

All species have the same genetic code.

Energy "moves from place to place." The term that describes this is___
a. Energy displacement
b. Energy transition
C. Energy transfer
d. Energy movement

Answers

Answer:

C. Energy transfer

Describe the processes of transcription and translation.

Answers

Answer:

The process by which DNA is copied to RNA is called transcription, and RNA is used to produce proteins is called translation.

Explanation:

translation is the process in which ribosomes in the cytoplasm or ER synthesize proteins after the process of transcription of DNA to RNA in the cell's nucleus. ...
Transcription uses a strand of DNA as a template to build a molecule called RNA

What is healthcare ?

Answers

Answer:

The organized provision of medical care to individuals or a community.

Health care, health-care, or healthcare is the maintenance or improvement of health via the prevention, diagnosis, treatment, recovery, or cure of disease, illness, injury, and other physical and mental impairments in people. Health care is delivered by health professionals in allied health fields.

Many parasites cause more harm to
the host than just feeding alone
because...
A. many parasites transmit disease.
B. many parasites become 'part' of the host
organism.
C. many parasites return with swarms.

Answers

c.many parasites return with swarms
C. Many parasites return with swarms

when your brakes fail, you should___.
a. shift to a higher gear
b. shift to a lower gear
c. not change your gear
d. alternate your gears

Answers

Answer:

d. alternate your gears

Explanation:

Answer:

D, “alternate your gears”.

Step-by-step explanation:

Based on the information in the graph, explain what physical process causes the cell to change size.

Answers

Answer:

Osmosis

Explanation:

Osmosis is the process in which solvent molecules move from lower to higher  concentration through a semipermeable membrane.

When a cell is placed in a hypertonic solution, the  cell loses water and moves from higher concentration to lower concentration that is from inside the cell to the water solution and causes shrinking of cell.

Shrinking of cell means decrease in size of the cell along with the passing time and cell loses all its water.

Hence, the correct answer is osmosis.

Jason joined a group that would work towards solving the workplace safety issues in his organization. Arrange Jason’s actions according to the stages of development of his group.

Answers

Answer:

- Jason asked his fellow group members  about their hobbies and interests .

- Jason and another member disagree on  what their respective roles should be in  the group.

- Jason resolved his differences with the  other group members .

- Jason began working with the group  members as a complete unit .

Explanation:

The correct order of Jason's actions in the stages of the development of his group would be as mentioned above. After the first step of the formation of the group, the next step is 'storming' in which the ideas are generated. Thus, Jason asks the group members regarding their interests and hobbies as it assists in the generation of effective ideas for problem-solving. The next step would be 'norming' in which the conflicts would arise due to disagreement regarding the respective roles of group members. Then, Jason as a team member would resolve the differences among the team members to reach a common solution. After everyone agrees upon the same idea, Jason can pursue working with the group as a complete unit. These stages are crucial for the effective development of the group and achieve desired results through cooperation and teamwork.

Through the process photosynthesis, plants and algae transform
light energy into chemical energy. Where in the plant does
photosynthesis take place?

Answers

Answer:

Photosynthesis takes place inside the chloroplasts.

Explination:

Green plants use photosynthesis to create energy from carbon dioxide and sunlight. This energy, in the form of glucose, is used by the plant to grow. Photosynthesis occurs within these structures, which contain the substance chlorophyll.

What happens to the volume of a gas if the temperature is
lowered?
The volume will increase.
The volume will decrease.

Answers

Answer:

The volume will decrease.

Explanation:

Volume of gas is directly proportional to temperature. So if temperature decrease, volume will also decrease.

(Correct me if I am wrong)

Answer:

the volume will decrease

Explanation:

according to Charles Law, the gas and the temperature is proportional to each other.

also the equation V1÷T1=V2÷T2 proves this claim.

hope this helps

1. Did your buoy move as you expected? Explain why or why not.

Answers

Wait did the what move as expected
According to what I know a buoy is a floating object that has many uses or purposes.

Maybe you have a different meaning to help answer the question.

hey please help
When explaining the 'circle of life' to Simba, Mufasa says, 'When we die, our
bodies become the grass...! What does her mean?
Is this accurate?​

Answers

Answer:

Hope i could help!

Explanation:

Mufasa is saying that when we die our bodies depcomose into the soil and feed the grass giving it minerals and nuitriants !

It means that when we die it gives a new life to another to live.

When Engelmann exposed photosynthetic algae to light in the presence of aerobic bacteria, he found that some wavelengths of light produced a higher rate of photosynthesis, as evidenced by the number of bacteria gathered near the algae. Based on his results, what color of light did Engelmann find associated with the highest rate of photosynthesis?

A. Red and blue
B. Yellow and green
C. Yellow
D. Red

Answers

Answer:

A. Red and blue

Explanation:

Theodor Wilhelm Engelmann, born in 1843 and died in 1909, was a German scientist. He was the scientist who detected which wavelengths of light produced the best photosynthetic activity in green alga. In his experiment, Engelmann exposed the photosynthetic algae to different wavelengths in the light spectrum. He then added aerobic (oxygen-dependent) algae to see where they will accumulate the most in order to detect the best wavelength for algae photosynthesis.

He discovered that the aerobic bacteria accumulated in the parts of the algae exposed to red and blue wavelength of light. This is because the algae exposed to the red and blue light produced more oxygen due to increased photosynthetic rate. This attracted the aerobic bacteria, which needs oxygen, to that particular area with that wavelength.

In the above reading, it talks about one population wandering away from the other in search of food as the beginning of the polar bear sub-species. Which of the following best describes what occurred to cause this split of the bear population?

A. The brown bears were killed by disease 125,000 years ago leaving only a population of polar bears.

B. The massive glaciers isolated the populations causing geographic isolation

C. They had a variety of fur color alleles, so all the white furred bears moved north

D. All of the Above

Question 2.
Which of the following is an adaptation that allows a polar bear to survive in this biome?

A. Thick fur to help them stay warm


B. They began hunting seal carcasses and then live seals at the waters edge to gain nutrients to survive


C. Their molar shape changed to adapt to eating seals instead of berries.


D. All of the above

Answers

Answer:

d,d

Explanation:

all the things are all the above because they have those to help the bears survive

An adaptation that allows a polar bear to survive in this biome because their molar shape changed to adapt to eating seals instead of berries.

What do you mean by biome?

A biome is a biogeographical unit consisting of a biological community that has formed in response to the physical environment in which they are found and a shared regional climate.

A biome is an area classified according to the species that live in that location. Temperature range, soil type, and the amount of light and water are unique to a particular place and form the niches for specific species allowing scientists to define the biome.

There are five major types of biomes: aquatic, grassland, forest, desert, and tundra, though some of these biomes can be further divided into more specific categories, such as freshwater, marine, savanna, tropical rainforest, temperate rainforest, and taiga.

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5
The outermost layer of the sun is called the
corona
chromosphere
ionosphere
photosphere

Answers

Photosphere is the answer.

How are organisms in the domain Archaea different from those in the domain
Eukarya?
A. Archaea have DNA that is not in a nucleus.
B. Archaea have mitochondria inside their cells.
C. Archaea are multicellular organisms.
D. Archaea hold genetic information in DNA.
HELP ME ASAP

Answers

Answer:

A. Archaea have DNA that is not in a nucleus.

Explanation:

Archaea do not have a nucleus thus their DNA is in cytoplasm where as Eukarya have a full fledged nucleus

Answer:

A. Archaea have DNA that is not in a nucleus.

Explanation:

Eukaryotes are the organisms that have well defined membrane bound nucleus and other membrane bound organelles in their cells. The domain eukarya include both unicellular and multicellular organisms. Archaea include the unicellular prokaryotic organisms that lack the membrane bound nucleus and membrane bound organelles.

hope this helped!

Which of the following leaves the
biosphere once put back into the
atmosphere?
A Nutrients
B. Heat
D. Water

Answers

I believe the answer is B) heat
yes, the answer is b) heat

If a person has Type A blood, he or she would have antibodies for what blood group>

Answers

Answer:

Only A antibodies

Explanation:

People with type A blood only have A antibodies. With type B blood, they only have B antibodies. If you have type O, however, you have both, and if you have AB you have none. Aww.

See the attached image.

How is a genetic switch different than a gene? How are they the same

Answers

Genes code for characteristics and processes, where a genetic switch is the process of genes being turned off and on during development, telling that cell to produce a specific set of proteins; for example, a if there was a stomach cell placed within your arm, that stomach cell would be switched off as the proteins that it produces are not needed in the arm; where a gene is the sequence that codes for the characteristics of that cell.

Organisms may contain up to five levels of organization within their bodies. Which level of organization is best represented by
the liver?

Answers

Answer:

ORGAN

Explanation:

The liver is a very important organ in the system of multicellular organisms e.g humans. It performs various functions in the body e.g. detoxification, metabolism etc. As rightly said in this question, multicellular organisms are made up of five levels of organization.

Firstly, all living organisms are made up of CELLS, which are the basic unit of life. Cells come together to form the TISSUE. Tissues that perform similar functions come together to form the ORGAN, the organ that specifically play a similar role in the body are collectively called ORGAN SYSTEM. The various organ systems make up the whole ORGANISM.

In this five level of organization, the liver falls under the ORGAN category because it is made up of cells called Hepatocytes, which come together to form tissues. The tissues collectively make up the LIVER.

Answer:

organ

Explanation:


Which organelle is responsible for producing the energy for cellular processes?
A. organelle A
B. organelle E
C. organelle F
D. organelle G

Answers

d - organelle G

i think :/
The answer is G

Mitochondria are organelles that are responsible for making adenosine triphosphate (ATP), the cell's main energy-carrying molecule.

Select the correct answer from the drop-down menu.
from the atmosphere to
The atmospheric temperature decreases when snow starts melting because the snow
melt

Answers

Answer:

The atmospheric temperature decreases when snow starts melting because the snow  absorbs thermal energy from the atmosphere to melt.

Explanation:

The temperature of the air, the intensity of the sun, the speed of the wind, and the amount of humidity are the factors that influence the melting of the snow. The thermal energy in the atmosphere is absorbed by the snow because the temperature of snow is less than the temperature of the atmosphere. When the flow of temperature takes place, the energy also flows. The thermal energy helps the snow to melt because the snow requires warmth to melt.

Answer:

B

Explanation:

A fault that is formed when compression causes the hanging wall to move over the foot wall is a(n)

Answers

Thrust fault is the answer

Why is it so important that we think about waste and what happens to it? *

Answers

Yes Its Important

yes it's good important to know about placed because if you think about waste then what saving the earth and remember that and plastic or wood will keep us and USA backlash tired and save future of tomorrow a mother nature and so is a very good thing to think about ways are the best thing about you will reset and two more things and have people and mark my words this happy a lot thank you have a nice day

Answer:

Mainly because it can destroy our lives. Waste is usually thrown into waste pits or places specifically for waste but what happens when there is no more place to put it? It can cause pollution and harm to wild life so if we pay more attention to it and try to stop how much waste is thrown out then maybe the earth will be able to live longer.

What happens when muscles in the frogs body wall contract?

Answers

With the nares open, the frog contracts muscles in the floor of its mouth to drop the floor of the mouth down. This enlarges the buccal cavity. Since the area is larger, the pressure inside the mouth drops. Air rushes through the nares into the buccal cavity equalizing the pressure inside and outside the frog.

What is an igneous intrusion?

Answers

Answer:

Igneous intrusions form when magma cools and solidifies before it reaches the surface.

Explanation:

The temperature of the magma was dropped to low for it to continue moving and hardened where it was

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