Answer:
A. earthworms
B. nutrients
C. bacteria
Explanation:
Humus is rich in organic matter and also is abundant in inorganic mineral nutrients.
(*) Sorry for my late answer but I hope this helps others that are looking for this.
100% in the test ;)
Humus is made of Earthworms, nutrients and bacteria. So, the correct options are A, B and C.
What is Humus?Humus is the soil's black organic material that results from the breakdown of plant and animal debris. It is a type of organic material for soil. It has a lot of nutrients and keeps the soil moist. The Latin word for "earth" or "ground" is humus.
Humus is described as a dark organic substance that develops in soil as a result of plant and animal debris decomposing. It is organic and dark in colour because carbon has accumulated there. It contains elements that are crucial to maintaining healthy soil. Earthworms, nutrients, and microbes make up humus.
Because humus is a feature of loamy soils, the high concentration of nutrients in the soil is caused by humus. Humus reduces a substance's porosity by obstructing the pores that permit the passage of water and air.
Therefore, the correct options are A, B and C.
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Etapas del desarrollo fetal.
Answer:
This time is divided into three stages, called trimesters.
Explanation:
First trimester, spans from conception to 12 weeks
Second trimester, spans from weeks 13 and 28.
Third trimester, spans from weeks 29 to 40.
https://my.clevelandclinic.org/health/articles/7247-fetal-development-stages-of-growth
If Dedra has a mass of 50 kg, where would she weigh the most?
Sun
Gravity = 274 m/s2
Moon
Gravity = 1.6 m/s2
Earth
Gravity = 9.8 m/sa
Answer:
probably on the sun
Explanation:
the explanation is because she weighs 50 kg on the earth. She would weigh less on the moon since the moon has less gravity to pull her down. The sun is the best answer considering that it has the most gravitational pull than the earth and the moon
what neurotransmitter is deficient in parkinson's disease and Alzheimer's disease?
Which type of wetland includes a mixture of salt water and fresh water?
Coastal lwetlands include a mixture of salt waler and fresh water This answer has been confirmed as correct and helpful. Hope it helps
Why DNA synthesis is faster than RNA synthesis?is there any advantage of being faster?
Answer:
Explanation:
I read it's has to do with the amount of nucleic acid that must be synthesized. RNAs are tiny compared to DNA, so there is little selection pressure for speed. Also, multiple RNA polymerases can initiate simultaneously, effectively increasing the synthesis rate
Answer:An obstacle to the triviality of the first issue includes the fact that DNA polymerase replicates DNA at a rate of 10-15 times faster than RNA polymerase transcribes DNA so that these enzymes inevitably collide if they attempt to function concurrently and co-directionally
Explanation:
At any given instant, only a fraction of the genome (total DNA) is being transcribed. Consequently, speed is not necessary.
The change in frequency of bean types over generations demonstrates how natural selection drives evolution by changing allele frequencies within a population.
a. True
b. False
The correct air track for a human respiratory system is
A.
-
B.
trachea - bronchus - bronchiole alveoli
trachea - bronchiole - bronchus alveoli
bronchus -
trachea
alveoli
bronchiole
trachea alveoli bronchus
bronchiole
С.
u
D.
Answer: Air enters through the nose (and sometimes the mouth), moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi and bronchioles till the alveoli.
Explanation:The pathway of air in the respiratory system starts with the external organs of the nose and mouth.
Nose: Air is inhaled through the nostrils (and sometimes through the mouth) where it is filtered by the hairs and cilia to remove dust particles and moistened. The nasal cavity also moderates the temperature of the inhaled air.
Pharynx: This is a common passage for food, water, and air. It leads from both the nose and the mouth and leads to both the trachea (windpipe) and the oesophagus (foodpipe).
Larynx: This is the voice box situated just over the trachea and has a flap called the epiglottis which closes during swallowing to prevent food from entering the trachea and opens during breathing.
Trachea: Air now enters the windpipe which is situated behind the sternum (breastbone) and between the two lungs.
Bronchus: From the trachea, two bronchi (one bronchus for each lung) enter the lungs and divide and subdivide into secondary and tertiary bronchi, getting narrower as they proceed into the lung.
Bronchioles: The tertiary bronchi branch into fine tubules called bronchioles, the last passageways for air.
Alveoli:. Air ends its pathway in the alveoli (sing. alveolus) which are tiny sacs with very fine singe-celled walls. These alveoli are surrounded by capillaries that connect the pulmonary arteries and veins and that enable transfer of oxygen and carbon dioxide.
Select the statement about human impact on the environment that is FALSE. The number of humans engaging in a specific activity impacts the severity of the issue. Damaging the environment threatens human and ecosystem health. Pesticide and fertilizer use by humans is particularly damaging to the environment. Urban growth leads to increased waste, which leads to climate change.
Answer:
the answer is should be True
A suspension of yeast cells is being grown under anaerobic conditions such that glucose is metabolized to ethanol and carbon dioxide. An inhibitor of alcohol dehydrogenase is added to the suspension, the cells rapidly die. Explain.
Answer:
The correct answer is - NAD needed to keep glycolysis going is not being recycled so the entire process is shut down and no ATP is produced
Explanation:
Alcohol dehydrogenase plays role in metabolizing the bulk of ethanol consumed as part of the diet and their activities contribute to the rate of ethanol elimination from the body.
Inhibitor of this zinc enzyme prevents it to perform its function which results in NADH generated during anaerobic conditions glycolysis cannot be recycled back to NAD+, So the ATP production pf anaerobic condition through glycolysis cannot be maintained.
The CT reveals several issues with the cranial structure, one of which might be in the cribriform plate but the image isn't well defined. What non-invasive test can you do to test if the cribriform plate is severely damaged? Why?
The non-invasive test that can be used to test if the cribriform plate is severely damaged is called the pledget study.
CRIBRIFORM PLATE is the part of the ethmoid bone that forms the nasal cavity.
The olfactory nerve which is part of the cranial nerves passes through the small opening found in the cribriform plate.
A damage to the cribriform plate leads to cerebrospinal fluid (CSF) leak which usually comes out from the nose and ears.
Therefore to test if the cribriform plate is severely damaged, the pledget study is performed.
Pledget study is a non-invasive method of diagnosing a CSF leak.
To perform this test,
Cotton pads called Pledgets are placed in the nostrils.If the leaking fluid contains CSF it will be detected.The presence of CSF shows that there is damage to the cribriform plate.
This method is non invasive because it doesn't require the breaking or opening of any part of the body.
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Determine whether the statement is trule or false, and why. “Muscles only work to produce movement by pulling, they cannot push."
A. False, it should read "Muscles only work to produce movement by pushing, they cannot pull."
B. False, it should read "A muscle works to produce movement by pushing and pulling."
C. False, it should read "Muscles only work to produce movement by contracting, they cannot push or pull."
D. True
It should be noted that muscles only work to produce movement through pulling, muscles cannot push. Therefore, the statement is true.
Muscles allow people to move by pulling in the joints. Muscles are required to breathe, exercise and stay healthy.
There are three main form of muscles in the human body and they're:
• Skeletal muscles: The muscles give the body its shape as they help in holding the skeleton together.
• Smooth muscle: They're also called the involuntary muscle. They consist of fibers and are controlled by the nervous system. They help in maintaining blood pressure.
• Cardiac muscle: This is the muscle that's found in the heart. It helps in ensuring that the heart function well.
In conclusion, muscles only work to produce movement by pulling, they cannot push.
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How does temperature and concentration of monounsaturated phospholipids change the rate at which molecules permeate the plasma membrane? Does this change occur equally for low permeability ions the way and large molecules as it does for gasses and high permeability molecules?
Describe the way that enzymes increase the rate of chemical reactions in the cell. What other factors related to enzymes can increase or decrease this rate and why?
Answer:
я не знаю ответа извините
Explanation:
if your results support the hypothesis when it becomes
The biological classification of organisms is called taxonomy. Based on your own investigation, discuss the importance of taxonomy in biological research.
Answer:
mark me as brainliest
Explanation:
It helps to ascertain the number of living beings on Earth. More than one million of species of plants and animals have been discovered and classified so far. It aims to classify the living organisms. Millions of organisms are classified scientifically in categories, which helps to have a better understanding
The theory and practice of characterizing, naming, and classifying living things is known as taxonomy. Such research is critical for a basic knowledge of biodiversity and its preservation.
What is the importance of taxonomy in biological research?Taxonomy is important because:
It aids in estimating the number of living beings on the planet. nearly one million plant and animal species have been identified and classified till date.Its goal is to classify living things. Thousands of creatures are scientifically divided into categories, which aids in understanding.It aids our understanding of the characteristics seen in plants and animals.It depicts the physical development in chronological order.It provides an overview of the local fauna and flora, which aids in the identification of endemic species.learn more about taxonomy here:
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Which test would be used to determine if lipids are present?
a) iodine test
b) none of these are correct
c) Benedict’s test
d) emulsion test
Option d) emulsion test would be utilized to determine if lipids exist present.
What is Emulsion test?The emulsion test exists as a method to determine the existence of lipids using wet chemistry. The procedure exists for the sample to be suspended in ethanol, permitting lipids present to dissolve. The liquid exists and is then decanted into water.
This test is accomplished to demonstrate the presence of lipids in a substance. The substance exists first dissolved in ethanol. This solution exists then dissolved in water. If lipids exist present in the mixture, they will precipitate and create an emulsion.
Hence,Option d) emulsion test would be utilized to determine if lipids exist present.
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A student is performing an experiment to see if fertilizer will help a plant grow. He/She sets up 2 containers to grow the plants in. In both containers the student puts the same type and the same amount of soil, the same type of plant seed, and then gives each container the same amount of water and sunlight each day. The only difference between the 2 containers is in container 1 the student gives the plant the fertilizer. During the next 60 days the student measures the growth (height) of the plant and records the data. What is the experimental variable is this experiment?
Answer:
The experimental variable, also recognized as what is being tested in this experiment is the fertilizer. The student is testing to see how much of a difference (if any) the fertilizer causes in plant growth.
The conversion of liquid water into gaseous water is called?
Answer:
vapourization
Explanation:
When the water is heated, it changes into water vapour which is called vapourization or sometimes we can also call it evaporation.
The sodium-potassium pump does not do which of the following actions?
-Moves sodium molecules against their concentration gradient into the cell
using ATP.
-Moves sodium molecules against their concentration gradient out of the cell
using ATP.
-Maintains the cell's physiological needs by establishing an electrochemical
gradient.
-Moves potassium molecules against their concentration gradient into the cell
using ATP.
The sodium-potassium pump does not allow the movement of sodium molecules against their concentration gradient into the cell with the use of ATP molecules.
In sodium-potassium pump, the sodium moves outside the cell whereas potassium moves inside the cell with the help of using ATP molecules. The sodium-potassium pump maintains the gradient of higher concentration of sodium extracellularly means outside the cell and a higher level of potassium intracellularly means inside the cell. This process is done only in the presence of ATP molecules that provides a force for the movement of sodium and potassium so we can conclude that no movement of sodium occur inside the cell in the sodium-potassium pump.
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Answer: Moves sodium molecules against their concentration gradient INTO the cell using ATP.
Explanation:
The sodium-potassium pump moves sodium molecules against their concentration gradient out of the cell and moves potassium molecules against their concentration gradient into the cell. It also helps to regulate internal physiological needs through gradients. However, it doesn’t move sodium ions into the cell—that occurs through passive transport.
PENN
In this diagram of a long bone, which type of bone marking is circled? anatomical drawing of a long bone showing the internal structure, with the point where the blood vessels enter circled
Answer:
the answer is osteon
Explanation:
If a physicist performs an experiment, who would likely try to replicate it?
The physicist himself
Other physicists
The family of the physicist
No one, because an experiment can never be replicated
I think the answer is the second one.
Which interaction involves only one of Earth’s spheres?
Plant roots take in water from the soil.
Plants take in carbon dioxide from the air.
During photosynthesis, plants make food and release oxygen into the air.
Energy stored in plants is transferred to humans and animals that eat them.Which property of soil depends on the size of particles?
color
odor
temperature
texture
Answer:
Energy stored in plants is transferred to humans and animals that eat them
Explanation:
List some Characteristic of fruits.
Answer:
Quality factors for fruits include the following— maturity, firmness, the uniformity of size and shape, the absence of defects, skin and flesh color. Many of the same quality factors are described for vegetables, with the addition of texture-related attributes such as turgidity, toughness, and tenderness.
What is the independent variable
Whats bigger, fungi or virus?
Answer:
fungi
Explanation:
bcuz it is plant-like organism with lack of chlorophyll
HELP ASAP PLEASE HELP FAST
Answer:
D. the basic unit of life
Explanation:
A cell is the basic fundamental unit of a living organism. There two types of organisms which are unicellular (single cell organism) and multicellular (many cells)
Initiation codon in eukayotes is ______
Answer:
AUG is the only initiation codon in eukaryotes.
Explanation:
Initiation codon in eukayotes is ___AUG___
In biological systems, there are several membrane transport systems responsible for the passage of ions like Na+ and K+.
a. True
b. False
Answer:
The correct answer is: a. True.
Explanation:
There are several membrane transport systems responsible for the passage of ions like Na+ and K+.
Cell membranes are semipermeable, which means they can regulate which molecules may and cannot flow through them. Some molecules may simply drift in and out of a cell (this is called simple diffusion), while others require specific structures to enter and exit (this type of diffusion is called facilitated diffusion), and still, others require an energy boost to pass the cell membrane (this is known as active transport).
Both simple diffusion and facilitated diffusion are types of passive transport: they happen without the energy boost that ATP gives, unlike active transport.
In passive transport, molecules follow their chemical gradients and travel through the most concentrated compartment to the less concentrated one to equal the concentrations. In active transport, on the other hand, the cell makes an effort to enter or exit ions against their chemical gradients and this is done particularly to maintain said gradients (they are required for the correct functioning of the cell).
Sodium and Potassium are two of the most important ions when it comes to maintaining these gradients: sodium is very concentrated in the outside of the cells (the extracellular compartment), while potassium is highly concentrated in the intracellular compartment. These differences in concentrations are maintained thanks to the Na+/K+ pump, a form of active transport. Apart from the Na+/K+ pump, these ions go through the membrane through passive transport as well, without requiring energy.
In an experiment to determine the acceleration due to gravity, one student holds a pencil at arm’s length and drops it. Another student starts a timer when the first student lets go and stops the timer when the pencil hits the ground. They repeat this several times and take an average. Is this a valid experiment, why or why not?
Answer:
The correct answer is - No, it is not valid because the short distance means there will be a lot of error due to the student's reaction time.
Explanation:
In this experiment to determine the acceleration due to gravity, there may be errors because of the student’s reaction time. The reaction can be late or early than prior reactions.
The other error can be caused by the distance was only at arm’s length throughout the experiment, which means that there was no independent variable that is the difference or change in the distance. This also makes the experiment invalid.
Which newborn is at the highest risk of having growth problems?
O A. Albert- 5 lbs
OB. Francis-9 lbs
C. Dmitri- 8 lbs
D. Gregor-6 lbs
Answer:
albert
Explanation:
because if you get their mean/avergae it is around 7lbs and albert being the lightest baby from the ideal he might have growth problems because having alot of weight can also result to baby fat or can be shaped to new in future
help me in my hw landslide can be prevented by terrace farming why
Answer:
Reducing the intensity of runoff.
Explanation:
Terrace farming prevent landslides and erosion to occur by reducing the intensity of runoff. This farming also reduce the risk of drought due to raising the moisture content in the soil and allowing water to slowly infiltrate into the soil. Due to terrace farming, the runoff water moves very slowly which causes less erosion of the soil as well as reduces the intensity of water flow which causes more infiltration.
