In a controlled experiment, the scientist changes an independent variable to study its effect on the experiment while all the other variables are kept constant.
Controlled experiments are those where all the variables are kept constant except the independent variables. This is done to increase the effectiveness and reliability of the experiments. The goal of controlled experiments is that the dependent variables should not ne affected or changed.
Independent variables are those that are the cause for the changes in the experiment. They themselves are not affected by the experiment but manipulation in them can change the other variables of the experiment called the dependent variables.
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Temperate grassland is best described by few trees, mostly grass , rich soil , cold winters, average rainfall , good for agriculture.
What is temperature grassland and what are its characteristics?
Temperate grasslands are the regions mostly covered with grasses and grasses , with shrubs also and large trees.The temperature of temperate region is majorly cold and less than other forest regions.Comparing it with tropical forests which have subsequent exposure to sunlight due the present of such forest on the equator.The amount of rainfall in temperate regions is not that appreciable comparing to the regions of tropical regions and savannas.From agricultural point of view also temperate regions are so good and produces a good amount of plants.To know more about temperate grassland visit:
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Albedo is the reflectivity of a surface. Surfaces that are very reflective, have high albedo. Which BEST describes the historical albedo of the earth?
A. More than 50 percent
B. Less than 50 percent
C. Exactly 100 percent
D. Exactly o percent
The correct answer is option B.
When the light hits the Earth, a particular amount of light is reflected back. This reflected rays of light is called albedo.
There are few places through which the light gets reflected and these are the lighter places.
The surface that reflects the most are lighter places like ice and the places that doesn't reflect are the dark places like soil.
The best historical albedo was seen in 1970s. During that period, the reflection was high and also during winters the amount of ice formation was also good.
After that due to the global warming, the percentage went down. Albedo is the reflecting light and if the light isn't trapped then the temperature tends to come down. We can say, the higher the albedo of the surface, the cooler will be the surroundings.
The best percentage of albedo in 1970s was around 30% which was historical albedo of the Earth.
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What makes endocytosis and exocytosis active transport mechanisms?O They involve the passage of molecules across the cell membrane.O They happen through simple diffusion.O They require energy to change the cell membrane.O They involve taking a large molecule into the cell.
Endocytosis and exocytosis are active transport mechanisms in which large molecules enter and leave the cell inside vesicles.
Endocytosis and exocytosis makes active transport mechanisms since they involve the passage of molecules across the cell membrane.
what does food and water affect homeostasis of a population
Food and water affect the homeostasis of a population because they are required nutrients to maintain the state of internal equilibrium in biological systems.
What are homeostasis conditions?Homeostasis conditions refer to all inputs from the surrounding environment that are required for biological systems in order to maintain the state of internal equilibrium, which is fundamental to sustaining life in organisms.
Water and foods are fundamental to maintaining the state of internal equilibrium or homeostasis conditions because they are required to carry out metabolic activities such as reproduction, growth, differentiation, etc, thereby the absence of these nutrients lead to the death of biological systems.
Therefore, with this data, we can see that homeostasis conditions are associated with the state of equilibrium of biological systems, which require the input of nutrients such as foods and water in order to carry out metabolic activities.
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What is the process where the mitochondria converts chemical energy into food stored into compounds?
Is it cellular respiration or oxidative phosphorylation?
Answer:
oxidative phosphorylation
Explanation:
What’s the correct answer asap for brainlist
Answer:
carbon dioixde
Explanation:
Answer:
Carbon dioxide is the correct answer
What reflects the primary routes of exposure to bloodborne pathogens?
Answer:needlestick injuries
Explanation:
Blood borne pathogens are the infectious microorganisms inside human blood that cause disease in humans. The primary route is mucous membranes and the fluids through the body.
What is mucous membrane ?The moist, inner lining of some organs' body cavities such as internal organs . Glands of the mucous membrane have mucus also called mucosa.
For a blood borne pathogen to spread, the bodily fluids of an infected person must enter into the bloodstream of another person. The most important agent of transmission in the workplace is when an infected person's blood enters another person's bloodstream through an open wound.
Unprotected openings of skin. Blood borne pathogens can be transmitted through cuts, scrapes, or any other open wounds. Mucous membranes and Penetration of skin.
Blood borne diseases should be clearly checked if there is any kind of pathogenic results or the outcomes happening in the blood.
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describe the structure and the function of the testes
Testes are responsible for producing testosterone (primary male sex hormone), androgens hormones, and sperm. It is an ovular-shaped structure formed from tubes surrounded by dense connective tissue.
Physical Science includes the study of _____________.
Answer choices
A. life and living organisms, including their physical structure
B. matter, energy, and different types of measures
C. our planet's physical characteristics, from earthquakes to raindrops, and floods to fossils
D. all living organisms, their makeup, environments, and relationships
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What is the correct steps involved in the process of making a protein?
The steps for protein synthesis are:
-Unziping
-Transcription
-Translation
-Elogation
-Termination
1) Unziping: DNA double strand unwinds to expose a sequence of nitrogenous bases (4 the base pairs along a length of DNA separate, exposing binding sites of the bases);
2) Transcription: A copy of the DNA strand is made creating a RNA strand (1 RNA bases bind to DNA bases);
3) The exit of the mRNA made up in the second step to the cytoplasm (5 An RNA copy of the gene leaves the nucleus);
4) Translation: (2 amino acids are brought to the RNA, the mRNA and the tRNA meet to translate the nitrogeneous bases in amino acids);
5) Elogation and Termination: (3 The amino acid string folds and form a protein) the protein information from the mRNA, translated with the help of the tRNA is used for the protein synthesis in the cells cytoplasm.
Therefore, the final order for the question is: 4-1-5-2-3
Question 1 (Multiple Choice Worth 4 points)
(03.02 MC)
A DNA sequence reads: ACAGTCGATGCA. Which of the following is the correct complementary DNA strand?
OCACTGATCGTAC
OGTGACTAGCATG
OTGTCAGCTACGT
OUGUCAGCUACGU
Question 2(Multiple Choice Worth 4 points)
(03.02 MC)
A DNA sequence reads: ACAGTCGATGCA. Correct complementary DNA strand is option c.)
c) TGTCAGCTACGT
According to the Complementary base pairing rule:
Adenine pairs with Thymine Cytosine pairs with GuanineBecause of this rule, with one strand of DNA having the sequence of ACAGTCGATGCA, other strand of DNA can only be a sequence that pairs the nitrogenous bases with their assigned pair.
Complementary DNA is a DNA copy of a messenger RNA molecule produced by reverse transcriptase that use either DNA or RNA as a template
Each DNA sequence has a complementary sequence running parallel, since DNA has 2 strands. In the complementary sequence, Adenine is paired with Thymine , and Cytosine paired with Guanine.
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what animals have long lifespan and why
One of the features that can make an animal to have a long lifespan is the size, due to the protection conferred by its size. Also, some animals like the elephant and the whale, have a slow cell replication rate, what reduces the risk of cancer, because the less they replicate, the fewer mutations can be caused.
Moreover, many animals have developted many ways of protecting themselves from mutations, such as having several copies of an important gene.
A list of some animals with long lifespan:
- Bowhead whale: potentially 200+ years old.
- Rougheye rockfish: 200+ years old.
- Freshwater pearl mussel: 250+ years old.
- Greenland shark: 272+ years old.
- Tubeworm: 300+ years old.
- Glass sponge: 10,000+ years old.
- Hydra: also potentially immortal.
Which process (es ) contribute to the proton gradient that powers ATP synthase in chloroplasts ? Choose ALL correct answers A proton pump uses light energy to move protons into the thylakoid space Protons are produced when water is split Protons are pumped into the thylakoid space using the energy from an electron transport chain Protons are produced when NADP + is reduced
Proton gradients are essential for chloroplast function. The light-induced gradient across thylakoid membranes is required for ATP synthesis.
Does ATP synthase pump protons?
The ATP synthase enzyme is reversible and can also function as a proton pump by coupling ATP hydrolysis to proton translocation. Each respiratory enzyme employs a unique strategy for proton pumping.
The light energy is used to separate an electron from PSII, causing it to cascade through the electron transport chain. Along with the electron transfer, a proton gradient across the thylakoid membrane is established, with a higher concentration of protons and a lower pH in the thylakoid lumen.
Therefore, the proton pump uses light energy to move protons into the thylakoid space.
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Describe experimental results that would support your hypothesis.
Hypothesis: if we add a solution containing ground-rod plants then it will have an effect on the growth of the radish seedlings.
The experimental results that would support the hypothesis if we add a solution containing ground-rod plants then it will have an effect on the growth of the radish seedlings is associated with plant size after the treatment with the target solution.
What are the experimental results?The experimental results are empirical data obtained as evidence to test (either confirm or reject) a plausible explanation or hypothesis of a phenomenon in the real world.
Therefore, with this information, we can conclude that experimental results can be used to test a hypothesis and they are obtained after treatment.
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The water cycle is grouped as biogeochemical cycle. The water cycle is often taught as a simple circular cycle of evaporation, condensation, and precipitation.
Why is water cycle a biogeochemical cycles?Water and components like carbon and nitrogen are recycled, whereas energy moves through an ecosystem. The environment is continually recycling nutrients and water. A biogeochemical cycle is the term used to describe the continuous recycling of a chemical element or water within an ecosystem. Both living creatures (biotic components) and nonliving objects (abiotic elements) in the ecosystem are involved in this recycling process. Water and other chemical elements are continuously transferred through living things to non-living things and back again through biogeochemical cycles. The water cycle, carbon cycle, and nitrogen cycle are three significant biogeochemical cycles.
The biogeochemical cycle that recycles water is the water cycle.
What is biogeochemical cycle?Any of the natural processes by which the fundamental components of biological stuff are transferred. The phrase "biogeochemical" is an acronym for the idea of taking each cycle's biological, geological, and chemical components into account.
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one of the stores for carbon that allows constant movement snd from it is...
Answer asap for brainlist i really need help
One of the stores for carbon that allows constant movement to and from it is Reservoirs.
What is carbon?
carbon is a chemical element, like hydrogen, oxygen, lead or any of the others in the periodic table. carbon is a very abundant element. It exists in pure orbthr nearly pure forms – such as the diamonds and the graphite – but can also combine with the other elements to form the molecules.
carbon is in a constant state of movement from place to place. It is stored in what are known as reservoirs, and it moves between these reservoirs through a variety of processes, including photosynthesis, burning fossil fuels, and simply releasing breath from the lungs.
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Answer: C
Explanation:
Which of the following is NOT a Greenhouse gas? a. water vaporb. chlorofluorocarbonsc. carbon dioxided. hydrogen oxideI need explanation
The correct answer is d. hydrogen oxide
All of the other choices are sources of greenhouse gases. Greenhouse gases refer to the gases in the atmosphere of the Earth that are capable of producing the greenhouse effect. It can be naturally occurring or man-made.
Naturally occurring gases are carbon dioxide and water vapor, while man-made gas is chlorofluorocarbons.
Determine which of the following is a courtship display.A. Tiger stripesB. Peacock feathersC. Dancing of beesD. Howler Monkey call
Answer: B
Explanation:To court potential mates, a peacock needs to rattle and shiver these train feathers in a certain way, producing a display of flickering feathers and distinctive noises. It has been known that this courtship dance signals the fitness of the males, as the extravagant display requires energy and muscular power to perform.
12. Use a model to explain how matter changes during
biochemical reactions like photosynthesis and respiratio
In the process of photosynthesis, oxygen and glucose are produced from water and carbon dioxide. As a consequence of consuming glucose, the plant creates oxygen. Oxygen and glucose are transformed into water and carbon dioxide during cellular respiration. By-products of the process include carbon dioxide, water, and ATP, which is turned into energy.
What are Cellular Respiration and Photosynthesis?Commonly used notation for photosynthesis is: 6CO2 + 6H2O C6H12O6 + 6O2. This means that the products, a sugar molecule and six oxygen molecules, are produced when light energy, which is harvested as chemical energy during photosynthesis, is converted from the reactants, six carbon dioxide molecules and six water molecules, into a sugar molecule and six oxygen molecules. The byproduct is the emission of oxygen. In the process of breaking down glucose during cellular respiration, oxygen is consumed, which also produces heat and chemical energy.To learn more about Photosynthesis and Cellular Respiration refer to:
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Option 1: A definite dry and wet season.
Explanation:savanna, also spelled savannah, vegetation type that grows under hot, seasonally dry climatic conditions and is characterized by an open tree canopy (i.e., scattered trees) above a continuous tall grass understory (the vegetation layer between the forest canopy and the ground).
sorry if it's wrong im not always accurate but if it is correct hoped it helped :D
Why might it not always be possible to determine the reactants and the products in a reaction? Explain your answer in terms of chemical equilibrium.
It might not be possible to always determine the reactants and products in reactions because reactants can be products just as products can be reactants in some reactions.
What are reversible reactions?Reversible reactions are reactions that proceed in both forward and backward directions.
The forward reaction is for the synthesis of products while the backward reaction synthesizes the reactant back as they are known in non-reversible reactions.
For example, consider this reaction: [tex]A + B < --- > C + D[/tex]
In the forward reaction, A and B are acting as the reactant while C and D are the products. In the backward reaction, C and D are the reactants while A and B are the product.
In reversible reactions, the forward reaction proceeds, but as soon as products are formed on the other side, both forward and backward reactions occur simultaneously, although at an unequal rate.
Reaction continues until a chemical equilibrium is reached. Both the forward and backward reaction proceeds at an equal rate.
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Part C
The style is the female reproductive part of the plant. Do some research online to learn more about the
style. Based on your observations and your research, how does the style play a role in reproduction?
The style is the female reproductive part of the plant. it plays important role in plant breeding .
What is style and the role of style in reproduction ?
The stigma and ovary are connected by a long tube-like structure called the style. The pollen tubes bearing male gametes enter the style tissues and travel to the ovary's ovule once the stigma's pollen grains have germinated. Once within the embryo sac, it travels to the egg cell to fertilize it with the aid of the filiform apparatus.
The style is crucial to the plant reproduction process since it not only serves as the site for the formation of the pollen tube but also functions to prevent incompatible pollen from entering the ovary. Genetic information is transferred between the pollen and the plant when the pollen tube begins to spread within the style. The plant also produces a poison at this period. The plant will release the poison to block the formation of the pollen tube if the pollen is unsuitable because it comes from a different species or is too closely related, leading to inbreeding.
If the pollen is compatible, the plant will isolate the poison and sequester it so that the pollen tube growth is not halted. Therefore, the style is the area where compatibility is evaluated and where it is decided if pollen that falls on a flower will be allowed to fertilize the plant.
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Which of the following is a way that
bacteria play an integral role in
ecosystems?
O
the make up most of the food that we eat
they act as decomposers to break down
organic matter
they spread disease across ecosystems
It is not Radioactive dating so don't pick that one
What describes using organisms that were only alive during a specific time period to estimate the unknown age of items?
Radioactive dating
Law of superposition
Relative dating
Index fossils
Geological periods are defined using index fossils. These fossils are frequently encountered, widely scattered fossils with a small time span. Therefore, option (D) is the correct answer.
What is index fossils?A fossil found in a relatively brief period of geological time that can be used to date the strata in which it is found is called Index fossils.
A relevant index fossil must be unique or easily recognizable, numerous, have a broad geographic distribution, and have a short temporal span. Index fossils serve as the foundation for identifying geologic time scale boundaries and strata correlation.
Therefore, index fossil describes using organisms that were only alive during a specific time period to estimate the unknown age of items.
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Why will the loss of photosynthetic organisms eventually cause a problem for animals ?
HELP ASAP
what is the function of the simple squamous epithelium forming mesothelium of serous membranes
Answer:
The mesothelium is a simple squamous epithelium that forms the surface layer of the serous membrane that lines body cavities and internal organs. Its primary function is to provide a smooth and protective surface. Mesothelial cells are squamous epithelial cells that secrete a fluid that lubricates the mesothelium.
Explanation:
trust i’m very smart
What’s the correct answer answer asap for brainlist
Answer:
c
Explanation:
Answer:
c
Explanation:
none of those other things affect the air
Which kind of signal is produced by the heart cardiacs and triceps of the arm
Answer:
Bones also protect the organs in our bodies. The skull protects the brain and forms the shape of the face. The spinal cord, a pathway for messages between the brain and the body, is protected by the backbone, or spinal column. The ribs form a cage that shelters the heart and lungs, and the pelvis helps protect the bladder, part of the intestines, and in women, the reproductive organs.
Explanation:
Bones are made up of a framework of a protein called collagen , with a mineral called calcium phosphate that makes the framework hard and strong. Bones store calcium and release some into the bloodstream when it's needed by other parts of the body. The amounts of certain vitamins and minerals that you eat, especially vitamin D and calcium, directly affect how much calcium is stored in the bones.
Answer:
The heart cardiacs produces ElectroCardiogram Signals (ECG)
Triceps produce ElectroMechanical Signals
Explanation:
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7. Which statement is correct?
1. Nitrogen must cycle through an ecosystem because it is used to make
proteins and nucleic acids.
2. Nitrogen makes up most of Earth's atmosphere.
3. Nitrogen gas from the atmosphere cannot be used by plants to make organic
compounds.
4. all of the above
Answer:
4
Explanation:
All statements presented are true.
Nitrogen is the main component in nucleic acids
Nitrogen is about 78% of the atmosphere
Nitrogen in the soil is the only way for plants to get nitrogen
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