Answer:
The amount of organic matter in mineral (sand, loam or clay) soils ranges from very low being 1% by weight, to average being 2 to 4%, and high being greater than 5%. There are also “muck” or organic or peat based soils that are 30 to 40% organic matter. The general consensus is the more soil organic matter the better. approximately 45%
Soil Composition
The basic components of soil are minerals, organic matter, water and air. The typical soil consists of approximately 45% mineral, 5% organic matter, 20-30% water, and 20-30% air. These percentages are only generalizations at best.
Explanation:
How long will it take for 40.0 grams of Radium-226 (Ra-226) to decay to leave a total of 2.5 grams of Ra-226? Ra-226 has a half-life of 1600 years.
Answer:
6400 years
Explanation:
Given that;
N/No =(1/2)^t/t1/2
No = amount of radioactive material originally present
N = amount of radioactive material present at time t
t= time taken for N amount of radioactive material to remain
t1/2 = have life of the radioactive material
2.5/40 = (1/2)^t/1600
1/16 = (1/2)^t/1600
(1/2)^4 = (1/2)^t/1600
4 = t/1600
t = 4 * 1600
t = 6400 years
The cell cycle can be divided into two broad stages:
The non-dividing portion, called _________________________
The cell division portion called ______________ & ________________
Answer:
The non-dividing portion is called Interphase.The Cell division portion is called Mitosis and cytokinesis
Explanation:
Answer:
chemical signals from cylins
Explanation:
Plz answer correct, it for test
A seismogram shows that P waves travel _____.
at the same speed as surface waves
more slowly than S waves
at the same speed as S waves
faster than S waves
Answer: P waves are faster then s waves
A confounding variable is an outside variable beyond the control of the race teams and official. What are some confounding variables that could contribute to the speed of the tracks?
Answer:
rain and turns
Explanation:
There are various confounding variables that could contribute to the speed of the track, one of which is rain. Rain is something that the race teams and officials cannot control and affects the speed at which racecars can operate on a track. This is because the Rain wets the tracks which prevents the cars wheels from properly gripping the track and instead causes them to skid. Another confounding variable would be turns. A track that has more turns would drastically decrease the speed of the tracks as cars would need to slow down for each turn.
take a look at the fossil made with amber on page 30. how are they formed and what features of the organisms are preserved in Amber?
HELP PLSSS!!! CROWN WILL BE REWARDED FOR CORRECT ANSWER!!!
Which is NOT a function of the digestive system?
A. protect your body from pathogens by providing a protective cover over your body
B. molecules are absorbed into blood and carried throughout the body
C. break down food molecules the body can use
D. wastes are eliminated
Answer:
Its, A.) protect your body from pathogens by providing a protective cover over your body
Explain why a high ratio of surface area to volume benefits a cell.
Answer:
smaller single celled organisms have a high surface area to volume ratio cause surface area to the volume ratio smaller as the cell grows larger. if a sell grow beyond the limit not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume
Name the largest and smallest national park
Answer:
Largest: Wrangell-St. Elias National Park and Preserve, AK, at 13.2 million acres.
Smallest: Thaddeus Kosciuszko National Memorial, PA, at 0.02 acres.
Which property of DNA contributes the most to DNA's ability to
replicate?
A. DNA coils into a long spiral or helix
B. DNA has two complementary strands that can separate
C. Each strand of DNA has a sugar-phosphate backbone
D. Each strand of DNA can be made of a unique sequence of
four different bases
The property of DNA contributes the most to DNA's ability to replicate is DNA has two complementary strands that can separate. Thus, option B is correct.
In how many steps replication occurs?Replication has been occurs in three major steps is the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment. During separation, the two strands of the DNA double helix uncoil at a specific location called the origin.
DNA replication has been known the biological process of producing two identical replicas of DNA from one original DNA molecule.DNA replication occurs in all living organisms acting as the most essential part of biological inheritance.
This is essential for cell division during the growth and repair of damaged tissues, while it also ensures that each of the new cells receives its own copy of the DNA. The cell possesses the distinctive property of division, which makes replication of DNA essential.
Therefore, The property of DNA contributes the most to DNA's ability to replicate is DNA has two complementary strands that can separate. Thus, option B is correct.
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. The nitrogen that exists on Earth was created by nitrogen-fixing bacteria. True or False
Answer:
Verdadero
Explanation:
I WILL MARK YOU BRAINELEST IF YOU GET THIS RIGHT Why are events such as volcanic eruptions or major earthquakes rare in Pennsylvania? Also 50 points
Answer:
This region of the United States has been tectonically active since the super continent Pangea broke up roughly 200 million years ago, and in large part because it is close to the western boundary of the North American plate. Since the formation of the San Andreas Fault system 25-30 million years ago, the juxtaposition of the Pacific and North American plates has formed many faults in California that accommodate lateral motion between the plates. North and east of California, the Basin and Range province between the Wasatch Mountains in Utah and the Sierra Nevada Mountains in eastern California is actively spreading and stretching westward.
MARK ME BRAINLIEST PLSSSSSSSSS
what kingdom has some organisms that use sunlight to make food, while others consume other organisms as their food source
Answer: Plant kingdom!
Explanation: Most plants use sunlight to make food with photosynthesis but others, like the Venus fly trap, consume other organisms. Good luck! :D
In pea plants, tall plants are dominant over short plants. cross a plant that is TT with a plant that is Tt. what percentage of the offspring are Tt?
this makes no sense sombody please tell me how to figure this out.
Answer:
50%
Explanation:
use a punnett square
T TT TT TTt Tt TtTwo of the four possible outcomes are Tt. That means half of them, or 50% are Tt.
I hope this helps
who were the frist people who came to guyana
Hello,
The first human inhabitants of Guyana probably entered the highlands during the 1st millennium bce. Among the earliest settlers were groups of Arawak, Carib, and possibly Warao (Warrau).The Dutch were the first Europeans to settle modern-day Guyana. The Netherlands had obtained independence from Spain in the late 16th century and by the early 17th century had emerged as a major commercial power, trading with the fledgling English and French colonies in the Lesser Antilles.
(The Words That Are BOLD are the answers.)
Have a great day/night and stay safe! :)
Answer:
Amerindians
The first people who came to Guyana to settle was the Amerindians.
Based on the context clue in the
sentence below, what does
brilliant mean?
The ball was a brilliant blue in
stark contrast to the dull, tan
walls of the racquetball courts.
A. dazzling
B. round
C. stuffy
Answer:
i belive is: A. Dazzling
Answer:
dazzling
Explanation:
when they use brilliant in this context, they are seemingly emphasizing the beauty in the pigment of the ball.
What is the age of Egyptian papyrus with 63% of its original carbon- 14 atoms?
C-14 half-life which is 5740 years as reference.
Learn more!
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Answer:
Egyptian papyrus: 3811.10 years
What is papyrus?
It is a material made in ancient Egypt from the pithy stem of a water plant, used in sheets the papyrus plant, a reed which grows in the marshy areas around the Nile river. Papyrus was used as a writing material
Do we still use papyrus?
Yes we do! Papyrus still exists in Egypt today but it has greatly reduced number.
2. Order the steps of mineral formation from the first stage to the final stage.
Answer:
(1) igneous, or magmatic, in which minerals crystallize from a melt, (2) sedimentary, in which minerals are the result of sedimentation, a process whose raw materials are particles from other rocks that have undergone weathering or erosion, (3) metamorphic, in which new minerals form at the expense of earlier ones owing to the effects of changing—usually increasing—temperature or pressure or both on some existing rock type, and (4) hydrothermal, in which minerals are chemically precipitated from hot solutions within Earth.
Explanation:
Hope this helps
From.
1kvibing
There is a history of global temperatures changing, but why is this change different? (1 point)
O The Earth is getting cooler everywhere instead of warmer.
There are more species on the planet this time.
O This shift in temperature is happening more quickly.
O It is not different; this is a regular shift in temperature.
Answer:
1) high water temperatures and water acidity cause coral polyps to expel algae, causing them to turn white in color
2) acidic carbon dioxide dissolves in water, lowering the water's pH
3) the shift in temperature is happening more quickly
4) to protect itself from the sun
5) the biodiversity of the water
Explanation:
should be 100% on the quick check if you put those answers
There are different ranges in temperature. Why is this change different is because this shift in temperature is happening more quickly.
Why are temperature around the world different?There are a lot of factors affecting temperature such has latitude. Most times, the places closer to the Earth's equator are said to be far warmer than those near to the poles.
The recent rise in temperature is said to be due to a new forcing. here, the greenhouse gas emissions from human activity, is said to have driven atmospheric CO2 to its highest level.
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4. Why does sexual reproduction result in offspring with genetic variation? Use the examples that you studied to support your answer.
Answer:
Sexual reproduction results in offsrping with genetic variation due to the multiplication brings about limitless prospects of hereditary variety. The examples, that can be studied to support this would be at the end of the day, sexual generation brings about posterity that are hereditarily extraordinary. They vary from the two guardians and furthermore from one another. This happens for various reasons.
Explanation:
Sexual reproduction results in offspring with genetic variation because it involves the fusion of genetic material from two parent organisms, typically a male and a female.
What is genetic variation?Genetic variation refers to the diversity of genetic traits or characteristics within a population or species.
The process introduces genetic diversity through several mechanisms in
Independent Assortment, Crossing Over, Genetic Recombination,
Mutations.
Overall, sexual reproduction promotes genetic variation by combining genetic material from two parents through mechanisms such as independent assortment, crossing over, genetic recombination, and the introduction of new mutations.
This variation is essential for the survival and adaptation of populations to changing environments and plays a fundamental role in evolution.
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20 pts!!!
The CRISPR system allows biologists to alter the nucleotide sequence of specific genes. Which of these tasks could theoretically be achieved by applying the CRISPR system instead of other techniques of genetic engineering?
A. transferring a functional gene from one organism to another
B. deactivating a disease-causing gene
C. replacing a defective gene with a normal gene
D. determining whether two DNA samples came from the same source
Answer:
B.
Explanation:
Your welcome
List 4 concepts you learned in this unit about waves and explain how each one applies to your life (4 points)
Answer:
amplitude, wavelength, frequency, and speed.
Explanation: Sound is a type of wave that moves through matter and then vibrates our eardrums so we can hear. Light is a special kind of wave that is made up of photons. You can drop a rock into a pond and see waves form in the water. We even use waves (microwaves) to cook our food really fast. Water waves are the focus of our Tsunamis and surf resources, but many other kinds of wave exist. These include sound waves, light waves, radio waves, microwaves and others. All kinds of waves have the same fundamental properties of reflection, refraction, diffraction and interference, and all waves have a wavelength, frequency, speed and amplitude.
2. Animals use oxygen in the process of
make more CO2.
Answer:
Cellular Respiration
Explanation:
As animals breathe, they take in O2 (Oxygen) and exhale in CO2 (Carbon Dioxide). This process is called cellular respiration.
Animals use oxygen in the process of cellular respiration to make more carbon dioxide.
What is Cellular respiration?Cellular respiration may be defined as a type of chemical reaction that involves the breakdown of food in the cell with the release of energy in the form of ATP with the help of oxygen and releases carbon dioxide.
The process of cellular respiration is utilized for the derivation of energy by cells in order to accomplish metabolic activities. This process generally occurs in the animal's cells.
The main purpose of this process is to convert foodstuff molecules into the most usable form of chemical energy known as ATP.
It is opposite to the process of photosynthesis in plants that utilized the carbon dioxide from nature and convert it into glucose and oxygen.
Therefore, animals use oxygen in the process of cellular respiration to make more carbon dioxide.
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A blind student runs his fingers along a page of
braille. Another student reads a page printed in a
textbook. Both students are able to obtain and
process the information most directly as a result of
the activities of the.
PLEASE HELP
Colorblindness is a recessive trait that is passed along to human offspring. The
inability to differentiate between or see some colors is controlled by a gene that is
found on the X chromosome. Why are more males affected by colorblindness than
females?
Colorblindness is more often found in males because they have less of a need to
see color
Colorblindness is more often found in males because they receive only one Y
chromosome and therefore men always will have colorblindness because
females do not have a Y chromosome
Colorblindness doesn't occur more often in males it happens equally in both
male and females
Answer:
The answer is the second one.
Explanation:
The answer is the second one because males have one x chromosome and one y chromosome. Females have only two x chromosomes. B makes more sense because males are more likely to have to deal with se-linked siorders because of their lack of x chromosomes.
Does this help?
Is the following statement true or false?
Environmental pressures cannot lead to adaptations over time, only mutations can.
True
False
PLEASE HELP!! WILL BE MARKED BRAILIEST
10 points for each question
7. reproductive cell containing genetic material from each parent organism, able
to grow into a complete new mold structure
Zygomycota
yeast
zygospore
stolon
8. sexual reproductive structure formed where two hypha of mold contact each
other *
stalk
symbiosis
spores
zygosporangium
Answer:
7-Answer is zygospore
8- Answer is zygosporangium
Explanation:
I hope it's helpful!
Its a multiple choice about the food chain with now 3 choices please help
Answer:
a higher than normal population of snakes
Explanation:
I believe this is the correct answer as it is the highest, and it is shown to be rising. it also goes through the rabbit line if that makes any sense, haha. anyways, I hope this helps! :)
☁️☁️☁️☁️☁️☁️☁️
Which of the following explains why antibiotics can treat flu-like symptoms caused by bacteria but are ineffective against flu? : A Flu is a response to an antigen. B Antibiotics require time to work. C Antibiotics strengthen antibodies. D Flu is caused by a virus.
Answer:
D Flu is caused by a virus.
Explanation:
Antibiotics are designed for bacteria, not viruses.
The statement which explains why antibiotics can treat flu-like symptoms caused by bacteria but are ineffective against the flu is that the flu is caused by a virus. Thus, the correct option for this question is D.
What do you mean by Antibiotics?Antibiotics may be defined as a type of drug that is significantly utilized in order to treat infections that are typically caused by bacteria and other microorganisms. It is a type of antimicrobial substance that becomes active against bacteria.
Antibiotics are the most important type of antibacterial agent for fighting bacterial infections. It can effectively treat flu-like symptoms caused by bacteria but are ineffective against the flu because the disease of the flu is generally caused or provoked by the presence of the Influenza virus.
Therefore, the statement which explains why antibiotics can treat flu-like symptoms caused by bacteria but are ineffective against the flu is that the flu is caused by a virus. Thus, the correct option for this question is D.
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1. Which is an example of the force of gravity?
A. A woman pulls open a door.
B. A magnet pulls an item toward it.
C. A student pushes his chair in at his desk.
D. A rolling ball slows down from friction.
Answer:
D
Explanation:
it is felling down I guess
Zachary has watched a documentary on the negative and positive impacts of cloning cells. Which of the
following might have been featured in the documentary as a positive impact that cloning may have on
individuals?
PLEASE HELP ME
Answer: Organ replacement
Explanation: