Marge Simpson decided to start a new garden in her backyard. She heard that plants compete for space and decided to test this idea. She bought a mixture of flower seeds and some potting soil. She put the same amount of soil into each of 5 plastic cups. In the first cup she planted 2 seeds, in the second cup she planted 4 seeds, in the third cup 8 seeds, and in the fourth cup she planted 16 seeds. In the last cup she planted 32 seeds. After 25 days, she determined which set of plants looked the healthiest. what is the 1 independent variable 2 Dependent variable(DV) 3 Controlled variables 4 Hypotesis
Answer:
The correct answer will be -
1. Independent variable - the number of seeds
2. Dependent variable - growth of the plant
3. Controlled variables - amount of soil
4. Hypothesis - plant growth is directly proportional to the provided space.
Explanation:
In a scientific experiment, the variables could be categorized as dependent variables(to be studied), independent variables (can be manipulated) and constant (kept constant).
A scientific hypothesis is the prediction or an idea based on the previous work and observations which could be tested to answer the question.
In the given question, the variables to be tested is growth of the plants while the variables which can be manipulated is the number of seeds. The variable kept constant is the amount of soil added to the cups and the hypothesis will be the plant growth is directly proportional to the provided space.
Some single-celled protists, such as paramecia, live in an extremely hypotonic environment and have contractile vacuoles that
The single celled protists which is one of the example of this is the paramecia survives and lives on extreme hypotonic environment. They have the ability of having to contract their vacuoles in which this contributes and help them to live and survive in a hypotonic environment.
All members of the same species that live in the same area and make up a breeding group is called
Which two examples show adaptations for plants growing in the desert?
Answer:
storage of water and developmend of thorns
Explanation:
The cactus is the best example of a plant that has adapted very well to the desert.
The first adaptation has to do with water storage. Thanks to the long roots it has, it can absorve water from very deep areas. The water stored is stored in adapted vacuoles. The cells of the cactus are adapted to transpirate as little as possible, no to loose water in evatranspiration process.
The second adaptation has to do with it´s thorns. Big, rigid and pointy thorns are the perfect defense tolive in the dessert. Animals will tend to eat plants which will not harm them at all. This is why, thorns are a great protection against hungry eaters.
Why is prior knowledge so important in science
Prior knowledge allows you to make a well-informed hypotheses and better-planned experiment. However, you do not want prior knowledge to bias your experiments in any way.
How many chromatids does a chromosome have before dna replication?
Predict which responses would occur in cells exposed to the a+b signaling molecules
When humans breed cows for better meat, this is called
Answer:
Selective breeding or artificial selection
Explanation:
Well, in this case humans are deciding to perpetrate a feature, in this case meat quality.
In nature, the so called natural selection ''chooses'' the survival of certain phenotypes which selects the fittest organisms. In the case of selective breeding, it's the humas who selects a particular phenotype.
The initiative to have infants sleep on their back, rather than their stomach, has been associated with:
It has been associated with later crawling but not with later walking. The reality is that any baby who is a healthy child should be put to sleep on his/her back rather than on their stomach or sides by their mothers or whosoever takes care of them. This practice is really useful to lessen the dangers of sudden infant death syndrome.
All organisms are capable of _____.
a. quick escape from predators.
b. changing shape to blend into their surroundings.
c. consuming other organisms.
d. growing and reproducing.
Answer:
the answer is D
Explanation:
i did the quize on this
The _____________ is the smallest unit that can live and reproduce independently.
The nurse has just assisted a client back to bed after a fall. the nurse and health care provider have assessed the client and have determined that the client is not injured. after completing the incident report, the nurse should implement which action next?
______________ are found in all metabolically active cells and are involved primarily in transporting materials within, into, and out of cells
Using your fingers to find your pulse on your wrist is an example of
Why is charles darwin considered the father of modern biology?
Areas of study that try to mimic science for cultural and commercial gain are called.
Why is water balance different for cells that have walls as compared to cells without walls?
Eukaryotes are different from Prokaryotes because Eukaryotes?..
What cellular process occurs on the infolded membranes shown at b?
PLEASE HELP!
Some organisms that normally live in pond water contain water pumps. These pumps continually pump water out of the cell. Describe a scenario that might reverse the action of the pump.
In pond water organisms like Paramecium, water pumps expel excess water from the cell to maintain osmoregulation. These pumps' action might reverse in hypertonic conditions, where the external salt concentration is higher than inside the cell. As a result, the cell might start absorbing water instead of expelling it to prevent dehydration.
Explanation:Organisms living in pond water, such as Paramecium, contain water pumps known as contractile vacuoles. These pumps typically work to expel excess water from the cell, maintaining a balance known as osmoregulation. However, there are scenarios where this action might be reversed, such as a sudden increase in the salt concentration outside the cell. This would create a hypertonic condition.
In hypertonic conditions, the concentration of solutes is higher outside the cell than inside. Therefore, water inside the cell would move out to balance the solute concentrations, and the cell may start taking in water instead of expelling it to prevent dehydration and maintain its structural integrity.
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which of the following are factors that both unicellular and multicellular organisms actively balance to achieve homeostasis
Describe the relationship between scientific research and the use of environmental resources
______ is a feature which results from processes associated with an oceanic-oceanic convergent plate boundary. choose all that apply.
identify one fuel source in the table that is considered a fossilfuel
Help appreciated! Compare and contrast critical thinking and an inference.
What is the process called to build a biological molecule?
Scientific investigations begin by asking questions that can be tested, measured, or both. Which question meets this criterion?
What opinions do teenagers have about vaccines?
Do hand sanitizers decrease a person’s risk of a bacterial infection?
Is buying organic food an ethical choice?
How hard is it for people to reduce stress in their lives?
Scientific Investigation can be tested, measured by asking in questions format.
For example - Do hand sanitizers decrease a person’s risk of a bacterial infection?
Science is more about practicing and conducting than knowing to gain and learn the actual aspect of the world.
This learning can be achieved through Scientific Investigation .
What is Scientific Investigation?A scientific investigation is a plan for asking questions and testing possible answers in order to advance scientific knowledge. The purpose of Scientific Investigation is testing ideas with evidence.
Real science is nonlinear, iterative (repetitive), creative, unpredictable, Scientists often undertake the steps of an investigation in a different sequence, or they repeat the same steps many times as they gain more information and develop new ideas.
Scientific investigations often raise new questions as old ones are answered and Successive investigations may address the same questions but at ever-deeper levels.
Alternatively, an investigation might lead to an unexpected observation that sparks a new question and takes the research in a completely different direction.
Steps involved in Scientific Investigation are:
- Step 1 - Make Observation
- Step 2 - Ask a question
- Step 3 - Forming hypothesis
- Step 4 - Making prediction based on hypothesis
- Step 5 - Do an experiment to test the prediction
- Step 6 - Analyze the result
- Step 7- Hypothesis is either Correct or Incorrect
- Step 8 - Final result based on Hypothesis
- Step 9- Try again if the given hypothesis is incorrect from Step 4.
Making Observation:
Scientific investigation typically begins with observations that is detected through human senses or with instruments and measuring devices that enhance human senses and also with our sense of touch, smell, taste, or hearing.
In addition, we can extend and improve our own senses with instruments such as thermometers and microscopes.
Hypothesis Formation:
A hypothesis is a possible answer to a scientific question based on scientific knowledge. A hypothesis also must be logical, and it is beneficial if the hypothesis is relatively simple. In addition, to be useful in science, a hypothesis must be testable and falsifiable.
A hypothesis is often expressed in the form of prediction.
Hypothesis Testing:
Hypothesis testing is at the heart of a scientific investigation. Data are essentially just observations which may be measurements in an experiment or just something the researcher notices.
A hypothesis is supported if the actual observations (data) match the expected observations. A hypothesis is refuted if the actual observations differ from the expected observations.
Analyzing the Data:
The data scientists gather raw data which are the actual measurements or other observations that are made in an investigation. Raw data usually must be analyzed and interpreted before they become evidence to test a hypothesis.
To make sense of raw data and decide whether they support a hypothesis, scientists generally use statistics.
Drawing Conclusion:
A hypothesis can never be proven conclusively to be true. Scientists can never examine all of the possible evidence, and someday evidence might be found that disproves the hypothesis.
In addition, other hypotheses, as yet unformed, may be supported by the same evidence.
The more evidence that supports a hypothesis, the more likely the hypothesis is to be correct.
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How does water's specific heat relate to its usefulness for life give examples?
Water's high specific heat stabilizes temperature, vital for organisms' survival, regulates body temperature, and influences climate patterns.
Water's high specific heat, defined as the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius, is crucial for life on Earth. This property enables water to absorb and store large amounts of heat energy with minimal temperature change, thereby moderating temperature fluctuations in the environment and providing thermal stability.
In biological systems, this thermal stability is essential for maintaining relatively constant internal temperatures, which is vital for the proper functioning of organisms.
For example, in humans, water's high specific heat helps regulate body temperature, preventing rapid overheating or cooling. Additionally, aquatic ecosystems benefit from water's ability to absorb and retain heat, maintaining relatively stable temperatures in rivers, lakes, and oceans, which is crucial for the survival of aquatic organisms.
Moreover, water's high specific heat also plays a role in climate regulation on a global scale. The oceans act as heat reservoirs, absorbing excess heat from the atmosphere during the day and releasing it at night, thereby influencing weather patterns and climate conditions. Overall, water's high specific heat is a fundamental property that contributes to the suitability of Earth for life as we know it.
The nurse is calculating the urinary output for the infant. the infant’s diaper weighed 40 grams prior to placing the diaper on the infant. after removal of the wet diaper, the diaper weighed 75 grams. how many milliliters of urine can the nurse document as urinary output? record your answer using a whole number.
Answer: 35 grams
Explanation:
Would you expect the tripeptide with the amino acid sequence –serine-threonine-tyrosine– to be found on the inner core or the surface of a cytosolic protein?