Can you please give me science project ideas that at least 2 weeks, with materials easy to find and that is in the difficulty of 9-10th grade?

Answer:

seperate

template

origin

During replication, the two DNA strands separates and each chain serves as a template for a new nucleotide chain. The sites where DNA replication and separation occur are called the origin.

DNA replication defines the biological process of making two identical copies of DNA from a single original DNA molecule. It occurs in all living organisms which acts as the most essential part for biological heritage.

During DNA replication, each of the two strands forming the double helix serves as a template from which the new strand is copied, while these new strands will be complementary to the parental or "old" strand. Each new double strand consists of a parent strand and a new daughter strand.

Steps involved in the DNA replication are:

1. Initiation

2. Elongation

3. Termination

Thus, during replication, the two DNA strands separates and each chain serves as a template for a new nucleotide chain. The sites where DNA replication and separation occur are called the origin.

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Answer: well it's which ever one that was getting the most sun and how much timne you leave each brick out in the sun

Explanation:

pls mark brainiest

Answer:

They need backups.

Explanation:

If the organism only has one food source they will use up that resource and eventually the organism will deplete due to lack of food.

Answer:

Pacific Ocean

Explanation:

thats where it is

The Pacific Ocean has the deepest depression in the world, called the Mariana Trench. The Mariana Trench is the deepest part of the world's oceans, located in the western Pacific Ocean.

The Pacific Ocean is the largest and deepest ocean in the world, covering an area of about 63.8 million square miles and accounting for more than one-third of the Earth's total surface area. It is located between Asia and Australia to the west, and the Americas to the east.

The ocean is known for its diverse marine life, including whales, sharks, dolphins, and various species of fish. The name "Pacific" was given to the ocean by Portuguese explorer Ferdinand Magellan in 1521, who called it "Mar Pacifico," meaning "peaceful sea," due to the calmness of its waters at the time.

However, the ocean is not always peaceful and is prone to natural disasters such as typhoons, hurricanes, and earthquakes due to its location on the "Ring of Fire," a region of intense seismic activity.

The Mariana Trench reaches a maximum depth of about 36,070 feet (10,994 meters) and is located on the floor of the western North Pacific Ocean, east of the Mariana Islands. The trench is crescent-shaped and about 1,550 miles (2,500 km) long, with a width of only 44 miles (70 km). It was named after the Mariana Islands, which are nearby.

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Answer:

An ecosystem is where there are many organisms such as plants and animals also including weather and landscape. Ecosystems have biotic and abiotic things . Ecosystems can be very large or very small.

Explanation:

Answer:

definitely d

Explanation:

this happens due to geological uplift and the erosion of The Rock and soil above them metaphorphic rocks will be exposed to weathering processes and may break down into settlement I was trying to answer this question earlier but then it wouldn't let me

Answer:

2nd option

Explanation:

CO2 is product of respiration

C6H12O6. +. O2. =. CO2. +. H2O

Answer:

To collect data about the population of worms before and after the rainfall.

Explanation:

The best way to test her prediction, we have to wait for the rain and collect the data after the rain and before the rain. The difference between shows the result whether she is right or wrong. In my opinion, she is right because the worms comes out from the soil in order breathe. The rain water block the porous spaces in the soil through which the oxygen enters into the soil and the worms can breather so due to blocking no oxygen for them so they come out from the soil after rainfall.

Answer:

Antibiotics, also known as antibacterials, are medications that destroy or slow down the growth of bacteria. They include a range of powerful drugs and are used to treat diseases caused by bacteria. Antibiotics cannot treat viral infections, such as cold, flu, and most coughs.

Explanation:

Answer:

yes because at the room temperature the bacteria and fungi grow but in the refrigerator the temperature is lower than the room temperature which is not sufficient for growing microbes due to which we preserve in refrigerator.

I hope u understand

Answer:

Renewable energy is over 90% of the energy use in the united states

no

cuz both are type A so the child has to be a type A

Answer:

It depends

Explanation:

It honestly depends on if the A-type allele is dominant over the B allele if not yes it's possible if the father or mother was Heterozygous with a B allele

Answer:

1. Absorption of mineral ions

hope it is helpful to you

Answer:

Hello There!!

Explanation:

The answer is=>1. Absorption of mineral ions.

hope this helps,have a great day!!

~Pinky~

Answer:

B.

Explanation:

Seems most reasonable to me but I could be wrong

Protein is important for growth and repair of body cells. Food sources of protein include meat, fish, dairy, lentils, beans, and tofu. Insufficient protein can lead to low growth and a weakened immune system. Excess protein may lead to weight gain and liver problems.

Answer:

here is your answer

Explanation:

Protein is important for growth and repair of body cells. Food sources of protein include meat, fish, dairy, lentils, beans, and tofu. Insufficient protein can lead to low growth and a weakened immune system. Excess protein may lead to weight gain and liver problems.

please follow me

Answer:

Explanation:

Due to technical problems, you will find the complete explanation in the attached files

Answer:

Plants increase in mass as they convert solar energy to chemical energy

Answer:

I don't remember the answer for the first one but for the others

2nd question : homogenous and Dominate

3rd question: heterozygous

4th question : homogenous and Recessive

Explanation:

Part (a)

Enter the data into your calculator or a spreadsheet. Then perform an exponential regression to find the curve of best fit. This is the closest exponential function we can assign to each population, to measure it's approximate growth.

Let functions f, g and h represent group 1 through 3 in that exact order. You should get these approximate functions:

Note: Group 3 doesn't have its population start until 1995, which is 10 years after 1985. This means h(x) only works when [tex]x \ge 10[/tex] or it's meaningless otherwise.

Each function found is of the form y = a*b^x, where 'a' is the initial population (at time x = 0) and b helps determine the growth rate. We set b equal to 1+r and solve for r to get the growth rate.

For f(x), we have b = 0.92755 approximately. Set that equal to 1+r and solve for r

1+r = 0.92755

r = 0.92755-1

r = -0.07245

The negative growth rate indicates we have population decline. Specifically, the rate of decline is about 7.245%

Repeat those steps for the b value of g(x) and you should find that r = 0.00295 meaning we have roughly a 0.295% increase for Mussel group 2.

Group 3 has a growth rate of about 42.775% due to r = 0.42775 in this case. The steps will be the same as for group 1.

=========================================================

Part (b)

The graph is shown below as an image attachment. I used GeoGebra to make the graph, and to also find the exponential regression equations.

We have x as the number of years since 1985, which is the starting point, and y is the population size. Something like (0,4800) means in the year 1985, the population is 4800 mussels (see group 1).

Keep in mind that the green curve for h(x) doesn't make sense for positive x values smaller than 10, due to the fact that the third group wasn't introduced until 10 years after the starting point of 1985.

Also, be sure not to think that the blue g(x) curve is linear. It looks like a flat line, but it's really a very stretched out curve. This is because the growth rate is very small.

=========================================================

Part (c)

It appears that group 3 has caused group 1's population to decline, due to the red points (see part b) going downhill as we move from left to right. This drop-off occurs at around the time group 3 is introduced. Strangely, only group 1 is affected while group 2's population is still increasing. This increase is not much, but it's still a positive growth rate. So it's fairly likely that there are other confounding variables to consider, and it's not entirely group 3 that's causing the trouble.

=========================================================

Part (d)

There are many ways that people impact their environment, whether it's a positive or negative impact. When regarding this topic of marine life, specifically mussels, one way that humans affect the population is what was mentioned earlier: The fact that the third group of mussels was introduced to the habitat. Often, though not always, if you introduce a new species to some environment, then the species of animals already living there may have a hard time coping with the newcomer. The new species would be referred to as "an invasive species". The invasive species is more aggressive at getting food to crowd out the older species that isn't used to the newcomer. This may explain why Mussel group 1 experiences a decline after 1995 when group 3 is introduced. This decline is fairly significant as the graph in part (b) shows.  Group 2 doesn't seem to be affected at all since it's growth rate is fairly flat yet steadily increasing even if done slowly. It's possible that group 2 is simply more adapted to deal with competition better than group 1.

Another way humans impact the environment is through pollution. Air pollution may contribute to acid rainfall that would lead to the ocean. There's also chemical pollution such as flushing harmful chemicals down the drain, which also leads to the ocean. This could apply to the average consumer, or to very big industrial companies. For instance, in the news recently in Florida, there was a very big worry that a holding pond could contribute to a spike in algae growth. While algae are beneficial, there are some species that invade more than their fair share of resources and kill off anything else more or less. This is one example where pollution contributes to harmful consequences to unfortunate species who likely die off. On top of pollution, there's general habitat loss that also may explain why group 1 is experiencing a sharp decline (however it wouldn't explain why groups 2 and 3 are growing).

Answer:

The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains a high concentration of ozone in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere.

Explanation:

hope this helps you

Answer:

There are many ways that drug-resistant infections can be prevented: immunization, safe food preparation, handwashing, and using antibiotics as directed and only when necessary. In addition, preventing infections also prevents the spread of resistant bacteria.

Explanation:

Answer:

Ribosomal RNA (rRNA) associates with a set of proteins to form ribosomes. These complex structures, which physically move along an mRNA molecule, catalyze the assembly of amino acids into protein chains. They also bind tRNAs and various accessory molecules necessary for protein synthesis.

Explanation:

Answer:

1) 10

2) 1000g

Explanation:

1000g =1kg

total bags needed = 10

5000g = 5kg

5000g /5

total 250 bags of grapes are needed = 1000g

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XD

Carcinogens are the agents that cause cancer in an organism and can be man-made or natural. Latex is not a type of carcinogen. Thus, option a is correct.

Carcinogens are the substances that can be a chemical or a biological compound that are capable of causing cancers. They can be natural agents like UV rays from sun, solar radiations, or viruses or can be a man-made substance like tobacco, nicotine, fumes.

These substances are capable of causing genetic mutations by altering the genomic sequence and the nitrogenous base that affects the genotype and the phenotype. The carcinogens leads to growth of abnormal and cancerous cells. Latex is a secondary metabolite that doe not causes cancer.

Therefore, option a. latex is not a carcinogenic agent.

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