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 is syndrome not labeled as a genetic disease?

Answers

Because there’s not mutations

Explanation:

If there is no mutation it’s not labeled as a genetic disease

Answer: because there isn’t mutations

Explanation:

Took the test

During the light reactions of photosynthesis, why is a molecule of water split?
to provide energy for the electron transport chain
a.) to provide energy for the electron transport chain
b.) to produce electrons that replace the two electrons that were lost from the chlorophyll molecule
c.) to assist in the process that produces ATP
d.) to form NADPH

Answers

Answer:

B

Explanation:

Electrons from photosystem II go through the ECT in the chloroplast, so water is split to replace those electrons.

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.

Mutations that neither benefit nor harm the organism have _________ effect on the organism's survival.


A. a positive


B. a negative


C. an aggressive


D. a neutral

Answers

The answer is D. A neutral

Answer:

Its neutral!

Explanation:

Read the passage from Darwin's journal. sorry its so long


The Amblyrhynchus, a remarkable genus of , is confined to this archipelago; there are two species, resembling each other in general form, one being terrestrial and the other aquatic. This latter species (A. cristatus) was first characterized . . . from its short, broad head, and strong claws of equal length, that its habits of life would turn out very peculiar, and different from those of its nearest ally, the iguana. It is extremely common on all the islands throughout the group, and lives exclusively on the rocky sea-beaches, being never found . . . even ten yards in-shore. It is a hideous-looking creature of a dirty black colour, stupid, and sluggish in its movements. The usual length of a full-grown one is about a yard, but there are some even four feet long; a large one weighed twenty pounds: on the island of Albemarle, they seem to grow to a greater size than elsewhere. Their tails are flattened sideways, and all four feet partially webbed. They are occasionally seen some hundred yards from the shore, swimming about; and Captain Collnett, in his voyage says, “They go to sea in herds a-fishing, and sun themselves on the rocks; and may be called alligators in miniature.” It must not, however, be supposed that they live on fish. When in the water, this lizard swims with perfect ease and quickness, by a serpentine movement of its body and flattened tail—the legs being motionless and closely collapsed on its sides. A seaman on board sank one with a heavy weight attached to it, thinking thus to kill it directly, but when an hour afterwards, he drew up the line, it was quite active. Their limbs and strong claws are admirably adapted for crawling over the rugged and fissured masses of lava, which everywhere from the coast. In such situations, a group of six or seven of these hideous reptiles may oftentimes be seen on the black rocks, a few feet above the surf, basking in the sun with outstretched legs.




What structural adaptation does the A. cristatus lizard have to help them climb rocks?

Awnsers:

A.strong claws

B.black color


C.flattened tail


D.webbed feet

Answers

Answer:

A) strong claws

Explanation:

cause if they werent strong they would break if they tried to climb the rocks... also the first guy said webbed feet cause there is a VERY SIMILAR question that asked how they could swim... its in the screenshot of what he was answering

The structural adaptation does the cristatus lizard have to help them climb rocks is strong claws.

Explain your answer briefly?

If they were not strong they would break if they tried to climb the rocks. Also the first guy said webbed feet cause there is a very similar question that asked how they could swim.

Thus, option "A" is correct, strong claws.

To learn more about  cristatus lizard click here:

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Why do two grams of fat provide a different amount of energy than two grams of carbohydrates? (2-3 sentences)

Answers

Answer:

Fats are the slowest source of energy but the most energy-efficient form of food. Each gram of fat supplies the body with about 9 calories, more than twice that supplied by proteins or carbohydrates. Because fats are such an efficient form of energy, the body stores any excess energy as fat.

Explanation:

Use the diagram below to answer questions 3 and 4
3.Identify one trait, other than beak characteristics, that would contribute to the survival
of a finch species and state one way this trait contributes to the success of this
species.
4. Explain Why are certain beak characteristics more advantageous than others?

Answers

Answer:

3. Size could

4. Beak's are advantageous because they have to be fit to eat the seeds that they need

Explanation:

size can affect because the bigger birds can fight the smaller birds off when they are eating the same product. Even with same beaks bigger birds will have an advantage.

Which community has the greater species diversity?
Select one:

Community Y, because the total number of individuals is greater

Community Y, because the community is richer

Community X, because the distribution of species is more even

Community X, because the community is richer

Answers

Answer:

Community X, because the distribution of species is more even

Explanation:

A population of rhinos was separated by a large river.
Since rhinos are lousy swimmers, they were unable to cross. Environmental conditions were very different on either side of the river, and over time these two groups of rhinos evolved such different characteristics that scientists classified them as two
different species. This is an example of:

A.sympatric speciation

B.homologous speciation.

C.analogous speciation

D.parapatric speciation

E.allopatric speciation

Answers

Answer:

B

Explanation:

Environmental conditions were very different on either side of the river, and over time these two groups of rhinos evolved such different characteristics that scientists classified them as two different species. This is an example of homologous speciation.

What is homologous speciation?

Organs or skeletal components of animals and organisms that are homologous suggest a connection to a common ancestor because of their similarity.

The appearance and purpose of these structures need not be identical. Other mammals with tails include rats, cats, and monkeys. Mammals have flexible vertebrae in their tails, which act as an extension of their torsos.

Although their primary purpose is to fend off insects, tails can also provide a sense of equilibrium for more reclusive species like cats.

Therefore, Environmental conditions were very different on either side of the river, and over time these two groups of rhinos evolved such different characteristics that scientists classified them as two different species. This is an example of homologous speciation.

To learn more about homologous speciation, refer to the link:

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Which affects biodiversity loss the most?
A. Habitat destruction
B. Introduced species
C. Pollution
D. Population growth

Answers

Answer:

I believe its C

look at the picture

Answer:

A. Habitat destruction

Besides riding a bike and using organic compost in your garden, describe another way you can help conserve our natural resources.

Answers

Answer:

5 minuite showers

Explanation:

You can start washing your hands faster. And you can brush your teeth with no water I

Environmental damage due to increased pesticide use

Answers

Answer:

I would say A

Explanation:

Is kidney disease a genetic or environmental disease? Why?
Brainiest to best answer

Answers

The answer is genetic. Kidney disease is usually inherited from parents or members of your family. It’s in your genes.

I NEED THIS QUICKLY 11 POINTS AND A BRIANLIEST IF YOU CORRECT

1. HYPOTHESIZE: Some human activities change environments in ways that harm both people and other
organisms. Describe one example of this kind of activity.

Answers

Answer:

Deforestation is one major human activity that harms both people and organisms. Cutting down trees lowers Earths ability to create fresh air, which leads to more toxic and polluted areas that can cause problems with breathing and even lead to lung cancer. Deforestation can harm other organisms because many animals such as birds, squirrels, and owls, look to the trees for a habitat. However, as we destroy they can cause a decrease in population which leads to an even bigger problem in the food chain.

I pts
While testing the effectiveness of a new antibiotic, researchers use three groups with
the following treatments:
• Group 1--receives a placebo
• Group 2: receives antibiotic A
• Group 3: receives antibiotic B
Which of the groups would not be considered a control group?
o the group that received antibiotic A
o the group that received the placebo
o the group that received antibiotic B
O both groups receiving antibiotic A and B

Answers

It would be the last one.

Researchers use three groups when testing the efficacy of a new antibiotic, so both groups receiving antibiotic A and B, are not a control group, but the ones that received the placebo is a control, so the answer is in the last option.

What is the significance of the control group?

The control group has various significant characteristics that allow researchers to compare the effectiveness of the experimental data with the standard and check the effectiveness, but the control group does not receive the experimental treatment. Here, the placebo-treated population is the control group, while the other two groups are experimental and can be taken as the control group.

Hence, researchers  use three groups when testing the efficacy of a new antibiotic, so both groups receiving antibiotic A and B, are not a control group, but the ones that received the placebo is a control, so the answer is in the last option.

Learn more about the control group here.

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What is it called when vesicles are used to move substances into a cell?

A. Exocytosis
B. Passive transport
She
C. Endocytosis
D. Diffusion

Answers

Answer:

The answer is C. Endocytosis

Answer:

the answer is endocytosis

Explanation:

Several natural processes contribute to speciation, the development of new
species. Which of these conditions is most likely to result in speciation?
A. Genetic drift that occurs in two reproductively isolated populations
B. Genetic recombination in a small population
C. Genetic mutations that occur often in a large population
O D. Gene flow between two geographically isolated populations
SUBNIT

Answers

Answer:

The correct answer is “A”

Step-by-step explanation:

hope this helps!

what did the results of the experiment show​

Answers

What experimemt is it?

PLEASE ANSWER ASAP!
How does the tidal force affect the water and beaches on Earth?

Answers

Answer:

it makes the water level go up and down

What constitutes the majority of the debris found in the “garbage patch" located in the North Pacific Ocean?

Answers

Answer:

Old Fishing Gear

Explanation:

The patch, in fact, is made up mostly of abandoned fishing gear. According to the study, fishing nets alone make up 46 percent of the 79,000 tons of garbage.

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.

Select the correct answer from each drop-down menu.
The image shows the path of a ball that’s thrown.
At positions (A,B,C, or D) and (D,E,F, or G), kinetic energy is maximum. At position (B,C,D,or E), potential energy is maximum.

Answers

At position (A) and (G), kinetic energy is maximum. At Position (D), potential energy is maximum.

At point A and G kinetic energy will be maximum while Potential energy is maximum at point D.

Kinetic energy (KE) is initially provided to the ball while it is still in contact with the throwing hand. Once the ball leaves the hand there is no input of energy. As the ball rises the KE is transformed to gravitational potential energy (GPE). This GPE is effectively stored in the height of the ball.Now, when the ball falls back to the ground its potential energy is transformed into kinetic energy, which will continue increasing as it gains momentum, until it finally collides with a surface.

Learn more:

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What conditions on Earth enable life to exist?

Answers

Answer:

- Earth's gaseous atmosphere (which consists of water vapor, 21% oxygen, 78% nitrogen, .9% argon) The water vapor helps regulate temperature and of course, oxygen is an essential aspect for us to breathe

- The availability of water

- Sunlight

-  A constant seasonal cycle (caused by the tilt of the Earth's axis & a perfectly sized moon which maintains the tilt)

When will there be an vacination for corona?

Answers

Answer:

No one knows yet

Explanation:

They haven't mentioned yet but they have started giving

Please don't take

Thanks.

Corona-virus is spreading around the world, but there are still no vaccines to protect the body against the disease it causes, C ovid-19.

Medical researchers are working hard to change that.


Design a plan that can be used by oil workers everywhere to save ecosystems

Answers

Answer:

Oil workers activities involved in the exploration of crude oil and natural gas creates pollution which affects the ecosystem negatively. The various pollutions cause the death of plant and animal life both on land and in water bodies.

The oil workers should be more careful in their activities to prevent oil spillage as much as possible and if there is any at all then there should be adequate measures in the cleaning it up efficiently through biological and harmless chemicals.

Which part of the female reproductive system is highlighted below?
A. Fallopian tube
B. Uterus
C. Cervix
OO
D. Ovary

Answers

Answer:

Ovary

Explanation:

I may be wrong because of the way that question is worded/shown tho

Answer:

B

Explanation:

What is the most common molecule in living things?
A. H2
B. CO
C. CO2
D. H20

Answers

Answer:

H20

Explanation:

because all living things need water(H20) in other to survive

The map shows the allele frequency of sickled hemoglobin (HbS) and malaria endemicity in Africa.


Which statement best explains the relationship between HbS allele frequency and malaria endemicity in Africa?
When an area is malaria free, the HbS allele frequency is between 0 and 2.02.
When an area is holoendemic, the HbS allele frequency is between 0.52 and 4.04.
When an area is malaria free, the HbS allele frequency is between 12.64 and 18.18.
When an area is holoendemic, the HbS allele frequency is between 0 and 0.51.

Answers

Answer:

(A). When an area is malaria free, the HbS allele frequency is between 0 and 2.02.

Explanation:

Answer:

A

Explanation:

Which component of the earth’s atmosphere is decreased due to photosynthesis?
ozone
oxygen
hydrogen peroxide
carbon dioxide

Answers

Answer:

Carbon Dioxide

Explanation:

Let's see the reaction of Photosynthesis

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

Where carbon dioxide and water are reactants and glucose and oxygen are products which means CO₂ and H₂O are taken from the environment and glucose is supplied to plants while oxygen is supplied back to the environment.

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.
Other Questions
Question 1Which of the following sentences needs to be citedA:George Washington was the first president of the United States.B:President Obama made an appearance on the Oprah show.C:Ross Perot used $10 million of his own money in his campaign for presidency.D:President John F. Kennedy was assassinated. Nativists were narrow minded about what it meant to be an American, What is your idea of what makes an American? How should we in the 21st Century define what American is? As an estimation 5 miles is 8km. convert 12.5 miles to km Which state of matter is by high density and definite shape?A. SolidB. LiquidC. Both Liquid and SolidD. Gas Our national anthem was written in what US city ? a: New Orleans b: St.louis c: denver d: Baltimore what is 98.5x13? estimated guess only Which of the following is equal to the fraction below? please hurry Ill make brainiest A ball is tossed into the air from a height of 6 feet above ground level,with a velocity of 3.4 feet per second. Which function could be used tomodel the height of the ball, after t seconds? Raj takes a taxi to the airport. He expects the taxi to travel at an average speed of 40 mph. The distance from Raj's house to the airport is 30 miles. If Raj's taxi actually travels at an average speed of 30 mph, how many more minutes does the journey take than expected? Which happened third?1 )Karl Marx and Friedrich Engels inspired the Russian revolution.2 )The Chinese people overthrow of the Manchu dynasty.3 )Mexican factions wanted Porfirio Daz out of power.4 )Western powers had forcefully secured trading rights in China. Anyone who can do this will be goated. B is the midpoint of segment AC Find the value of x. M is the midpoint of segment VW. Find the value of X Computers in a LAN are configured to use a symmetric key cipher within the LAN to avoid hardware address spoofing. This means that each computer share a different key with every other computer in the LAN. If there are 100 computers in this LAN, each computer must have at least: a. 100 cipher keys b. 99 cipher keys c. 4950 cipher keys d. 100000 cipher keys The table below shows the similarity of Methane and water in molecular mass. They are also similar in both size and shape. Why does Methane exist in the gas state with a very low boiling point? Which phrase best completes this list?Results of the Louisiana PurchaseUnited States doubles in sizeAmerican control of the Mississippi River?ASAP PLEASE which expression is equivalent to (x6y8)3/x2y2 Rough draft our changing society enriques journey graphic organizer New York State's "Quick Draw" lottery moves right along. Players choose between one and 10 numbers from the range one to 80; 20 winning numbers are displayed on a screen every four minutes. If you choose just one number, your probability of winning is 20/80, or 0.25. Lester plays one number fourteen times as he sits in a bar. What is the probability that all fourteen bets lose Which angle is adjacent to 24?22232528 What is the formula to find the area of a triangle