Why do scientists carry out experiments?
A.
Because scientific knowledge is based on observations

B.
Because scientific knowledge is full of untested theories

C.
Because scientists like to control variables

D.
Because scientists like to work in labs
Answer:
A
Explanation:
the scientist always makes a hypothesis
refer(s) to an individual's preference for emotional sexual relationships with members of the opposite sex (heterosexuality), the same sex (homosexuality), or both (bisexuality). A) Sexism B) Gender identits C) sexual identification D) Sexual orientation
Answer:
D. Sexual orientation
Explanation:
Hope this helps! Have a nice day!
Plants use energy from sunlight, water, and carbon dioxide to produce sugar. Which structure is found only in plant cells and helps plants capture energy from sunlight?
A. vacuole
B. nucleus
C. chloroplast
D. cell membrane
Answer:
The Answer is C. Chloroplast
Explanation:
Chloroplasts are the organelle of photosynthesis. They capture light energy from the sun and use it with water and carbon dioxide to make food (sugar) for the plant. The arrangement of chloroplasts in a plant's cells can be seen in Figure below.
The transfer of heat is responsible for many of the events that occur on Earth. Which of the following events is most directly caused by radiation from the Sun?
the circulation of air
the warming of Earth’s surface
the movement of ocean currents
the movement within Earth’s mantle
Answer:
the circulation of air
Explanation:
air is from a sun
In what way does walking help The environment? How does it make you feel about the state of our environment?
Answer: Walking plays an important role in improving our quality of life because it helps protect and improve the living environment and natural resources. ... Communities designed to be walkable have the potential to reduce air pollution and greenhouse gases because people may choose to walk or bike rather than drive. Walking plays an important role in improving our quality of life because it helps protect and improve the living environment and natural resources. Improving the environment in turn brings added health benefits that come, for example, from cleaner air, less traffic noise and fewer road accidents.
Explanation:
what process adds oxygen to ocean water?
Answer: photosynthesis
Explanation: this person explained: https://brainly.com/question/1147634
Humans, and other animals, exhale
A. oxygen
B. natural gas
C. carbon dioxide
D. cytoplasm
Answer:
C
Explanation:
Humans,and other animals,exhale carbon dioxide and inhale oxygen.
Answer:
c: humand and animals exhale carbon dioxide
which statement is correct about the relationship between plants and animals
A.) plants depend only on food
B.) animals depend only on plants for food
C.) plants do not depend on animals to survive
D.) plants and animals depend on matter produced by the other to survive
Answer:
hm id say D tell me if im wrong
Answer:
D
heres why because how do we breath plants and some plants are food.
How is a warm front different from a cold front?
Warm fronts cause snow flurries in the winter, while cold fronts cause several days of rainy weather.
Warm fronts cause rapid changes in weather, while cold fronts cause several days of cloudy weather.
Warm fronts cause several days of cloudy weather, while cold fronts cause heavy snow in the winter.
Warm fronts cause thunderstorms in the summer, while cold fronts cause rain when the air is humid.
Answer:
Warm fronts cause rapid changes in weather, while cold fronts cause several days of cloudy weather.
Explanation:
i'm pretty sure
Warm fronts cause rapid changes in weather, while cold fronts cause several days of cloudy weather. So, the correct option is B.
What are Warm and cold fronts?A warm front forms when a mass of warm air enters a space that previously held cold air. As warm air passes over cooler air, it rises and cools, which can result in the formation of clouds and precipitation. Unlike a cold front, a warm front often brings with it lighter and more widespread precipitation. Warm fronts often bring warm temperatures and high humidity levels.
When a mass of cold air approaches an area that was previously surrounded by warm air, a cold front is formed. When cold air flows into warm air, the warm air is forced to rise rapidly, which can result in thunderstorms and heavy rainfall. More extreme weather changes, such as a sharp drop in temperature and drop in humidity, are often brought about by cold fronts.
So, the correct option is B.
Learn more about Warm and cold fronts, here:
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plant that lacks true roots,sterms and leaves
Answer:
Bryophytes is the answer :)
Explanation:
What is not a function of the atmosphere?
Answer:
the function of atmosohere is protectibe and sbsorbs
Explanation:
Protective functions of the Atmosphere Absorbs and interacts with harmful electromagnetic radiation and stream of charged particles.
Shawn explains that many studies have shown that directly spraying bees with fungicides doesn't harm them. Are those results consistent with what Shawn has discovered? Explain your answer in a few sentences.
Answer:
Yes.
Explanation:
Yes, the results will be consistent of spraying bees with fungicides because the fungicides affect the growth of fungus not the bees. fungicides are the chemicals kills fungal growth while on the other hand, insecticides will kill the insects such as ants, bees etc. If the Shawn apply insecticide on the bees, it will kill the bees due to its effectiveness so that's why the results of the directly spraying bees with fungicides will always be consistent due to its ineffectiveness.
Cross a heterozygous axial, hybrid round seed plant with a hybrid axial, heterozygous round seed plant. Only list the phenotypic ratio at the end.
Answer:
The phenotypic ratio is 9:3:3:1
9/16 individuals with axial flowers and rounded fruits, R-A-3/16 individuals with terminal flowers and rounded seeds, R-aa3/16 individuals with axial flowers and wrinkled seeds, rrA-1/16 individuals with terminal flowers and wrinkled seeds, rraaExplanation:
We need to cross a heterozygous axial, hybrid round seed plant with a hybrid axial, heterozygous round seed plant. When referring to a hybrid plant for a trait, we are meaning that the plant is heterozygous for that trait.
Let us assume that round is the dominant trait, codified by a diallelic gene, so
R is the dominant alleler is the recessive alleleLet us also assume that axial is the dominant trait, so
A is the dominant allelea is the recessive alleleCross:
Parentals) RrAa x RrAa
Gametes) RA, Ra, rA, ra
RA, Ra, rA, ra
Punnett Square) RA Ra rA ra
RA RRAA RRAa RrAA RrAa
Ra RRAa RRaa RrAa Rraa
rA RrAA RrAa rrAA rrAa
ra RrAa Rraa rrAa rraa
F1) Among the progeny, we expect to observe the following phenotypic ratio:
9/16 individuals with axial flowers and rounded fruits, R-A-3/16 individuals with terminal flowers and rounded seeds, R-aa3/16 individuals with axial flowers and wrinkled seeds, rrA-1/16 individuals with terminal flowers and wrinkled seeds, rraaWhich sequence furthers scientific knowledge? Hypotheses generate a scientific question, leading to observations, which can be tested through an experiment. Observations generate a scientific question, leading to a hypothesis, which can be tested through an experiment. Hypotheses generate a scientific experiment, leading to observations, which can be tested through a question. Observations generate a scientific experiment, leading to a hypothesis, which can be tested through a question.
Answer:
The correct answer is - Observations generate a scientific question, leading to a hypothesis, which can be tested through an experiment.
Explanation:
In any scientific knowledge development process, scientists need to follow the scientific process in a particular sequence that helps in developing and testing a hypothesis.
The sequence has:
observation: Observation requires you to pay attention to occurrences around
Forming question: on the basis of observation form a question about why that occurrence happens.
Hypothesis formation: The hypothesis is your initial prediction on why that happens.
Experiment: The experiment is being done in order to collect data and analysis so you can test your hypothesis
Answer:
Its b
Ur welcmom
Some suggestions for measures that the United States can implement to avoid contributing to greenhouse gases!
Answer:
1. Increase the use of green renewable energies
2. Promote recycling
3. Controlling industrial greenhouse CO2 emissions from the transportation sector
4. encourage the use of non-polluting means of transport (e.g., walking over road transport)
Explanation:
First, renewable energies are energy sources generated naturally without the use of fossil fuels (e.g., solar energy, wind energy, geothermal energy, etc). Thus, these green energies can replace the use of fossil fuels in a sustainable manner, and therefore reduce the emission of greenhouse gases such as carbon dioxide (CO2). Second, recycling can drastically reduce the amount of energy required to synthesize new products and reduces the need for new materials, being thus also useful to reduce CO2 emissions that result from extracting virgin materials. Third, the industries from the transportation sector produce the largest part of greenhouse gas emissions, thereby encourage the use of green energies in this area may represent a good alternative to reduce CO2 emissions. Finally, it is well known that urban transport generates about 40% of all CO2 generated by road transport, and thereby invest in green transport systems such as bicycling and walking may also represent a useful strategy to reduce CO2 emissions.
I mark you brainiest just please answer this question for me please
Answer:
It is C, To fill the space between the cell membrane and the nucleus.
Explanation:
I hope this helps! Have a great rest of your day!
Drag one of the nucleotides to a corresponding nitrogenous base on one of the two strands. What is
the role of DNA polymerase in this process?
Answer:
This enzyme is responsible for the production of DNA molecules from RNA molecules.
Explanation:
DNA polymerase is a type of enzyme that produces DNA molecules from RNA molecules. The enzymes play a vital role in the replication of DNA in which the enzyme produces two identical copies of DNA from one original DNA molecule. This replication of DNA is very important for cell division as well as growth of the organisms. Without this replication, no mitosis occurs in the body that leads to no growth of the organism so we can say that this enzyme plays a great role in growth of an organism.
The process of the formation of the new from the old DNA is called is replication.
The enzyme responsible for the formation of DNA replication is DNA polymerase.
The things required in the formation of new DNA is as follows:-
DNADNA polymeraseDNA ligaseThe function of the DNA polymerase during the time of DNA replication is to get the nucleotide as a monomer to join together by the DNA ligase. The nucleotide joins together in the 5' to 3' direction.
The drag of one nucleotide from the sequence leads to the mutation. These lead to the form of the infected protein and form the abnormal character.
For more information, refer to the link:-
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The space shuttle leaves the surface of the earth and reaches a height of 50,000 kilometers in 25 seconds. What is the average speed of the shuttle during this journey?
Select one:
200,000 km/s
20,000 km/s
200 km/s
2,000 km/s
Answer:
2000 km/s
Explanation:
the formula for speed is speed=distance/time, this is the formula that should be used here. 50,000/25, which equals 2,000
what is a similarity of an ecosystem and a habitat
Answer:
Habitat and ecosystem are two ecological terms.Both include living organisms. Organisms live in both systems.Hope this helps!
Answer:
Both include living organisms. Organisms live in both systems
Explanation:
Answered by NONE other than the #QUEEN herself aka #DRIPPQUEENMO
HOPED THIS HELPED!!
Angela set out to determine how many genes
control the length of people's eyelashes. She
compared the length of eyelashes from 12 different
people. She measured each person's eyelash by
placing the eyelash on a metric ruler and measuring
the length directly.
What is a possible source of error in her
experiment?
A. She did not collect data from enough
people.
O B. She should have considered the number of
eyelashes on each eyelid in her data
collection.
O C. She may have had a difficult time making
accurate measurements directly.
O D. She did not include a control group.
The statement 'she did not collect data from enough people' is a source of error in an experiment (Option A).
What is the N sample?The N sample refers to the number of objects and/or persons tested during an experimental procedure.
The N sample is fundamental for eliminating the source of variation that may lead to errors.These errors are a consequence of faulty testing of a suitable number (N) sample.In conclusion, the statement 'she did not collect data from enough people' is a source of error in an experiment (Option A).
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Rising water vapor that meets cold air and turns into water
droplets is known as:
a. dehydration
b. evaporation
c. precipitation
d. condensation
Answer:
D
Explanation:
Without the process of translation, our cells would not be able to:
make DNA
make RNA
make amino acids
make proteins
Answer:
Make protein
Explanation:
Make protein by RNA
Explain how cellular respiration is important for the production of ATP build on aerobic vs anaerobic
Answer and Explanation:
ATP is the energy molecule of the organism, being necessary for all cellular processes. It is produced in both aerobic and anaerobic respiration, but the processes are different.
Aerobic respiration, ATP is produced by breaking down the glucose molecule found in the food we consume. This process occurs in all organisms that need the presence of oxygen to survive. However, this is a complex process that occurs with the help of several enzymes and co-enzymes that perform various oxidation reactions on the glucose molecule, transforming it into carbon dioxide, water and ATP.
Anaerobic respiration is also known as fermentation and occurs in all organisms that cannot survive in the presence of oxygen. This process also occurs with the help of enzymes and coezimas, where the glucose molecule is degraded until it becomes two molecules of pyruvate. During the pyruvate degradation reactions, an ADP molecule is released, which will later be added to a phosphate molecule that is free in the cytosol, becoming ATP.
point) A student examines a cell under the microscope and observes that the cell contains many mitochondria. This is evidence that the cell uses lots of
a,lipids
b,protein
c,energy
d,DNA
Answer:
Answer: mitochondrios produce energy from glucose, and c might be wrong dont be mad at me
Explanation:
Answer: mitochondrios produce energy from glucose, also C is right
Why do cells need to undergo meiosis
Answer:
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction. ... Meiosis begins following one round of DNA replication in cells in the male or female sex organs.
which reproduction uses non reproductive plants of a plant to produce new plants
Answer:
Vegetative propagation
Explanation:
Vegetative propagation does not require seeds or spores. Instead, offspring grow from a part of the parent plant.
is planting trees in a forest In an investigation into the role of plants in the cycling of matter, a researcher is designing an experiment in which plants will be grown under conditions that will limit the rate of photosynthesis. Which design would match the goal of the researcher? M. Grow the plants in a low oxygen environment and measure the rate of carbon dioxide production. P. Grow the plants in a low carbon dioxide environment and measure the rate of oxygen production. R. Grow the plants in soil containing excess water and measure the rate of transpiration. S. Grow the plants in soil containing excess nitrogen and measure the rate of plant growth. Bi
Answer:
S
Explanation:
The growth of plant can be measured using the starch produced.
Please answer ASAP! My teacher just assigned this today, and it is due in an hour..I have about 30 questions to finish :(
Why are organisms in lower parts of the food chain not affected but organisms at the top of the food chain are?
Answer:
the organisms at the top of the food chain are effected because theyre bigger and the need more food and prey to survive. for example sharks, if fish arent thriving because they arent eating enough from the bottom of the food chain, the sharks cant eat them and the sharks will starve.
Explanation:
Answer:
The organisms at the bottom of the food chain have a tendency of reproducing faster. (unlike the top of the food chain). Don't think that the the organisms at the bottom of the food chain are not as important though! Everything is important in any food chain!
Describe the difference between primary succession and secondary succession. (Be sure to use the vocabulary terms: climax community and pioneer species in your description. Also include a general
time frame for each event)
Answer:
Explanation: Primary means that it was from thAT TIME PERIOD AND SECONDARY MEANS YEARS AFTER THAT TIme period.
which two layers of the atmosphere are responsible for the majority of solar radiation absorption?
Answer:
The stratosphere and thermosphere.
Explanation:
