Answer:
Yes
Explanation:
There are plenty of evidences and uses of sieving
It was begun by Romans
Nowadays it's used to separate several mixtures like sands for construction,food materials etc
Bone cells that become surrounded by bone matrix and are located in cavities called lacunae are:.
Answer:
Osteocytes
Explanation:
i studied this
During an action potential, the rapid decrease in sodium permeability and simultaneous increase in potassium permeability is responsible for __________.
the repolarization of the cell.
Mechanism :
Action potentials are signals that are sent and received by muscle and nerve cells. Because of the negative concentration gradient in the resting membrane potential of nerve cells, there are more positively charged ions outside the cell than inside. There are more sodium ions outside the cell and more potassium ions within because these positively charged ions are sodium ions. Action potentials cause the membrane to depolarize, which is followed by the process of repolarizing the cell. The membrane potential changes and reverts to the negative value of the resting potential during repolarization. The potassium channels open and the sodium channels close at this stage, allowing the nerve cell to lose positively charged ions.
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A student lifts a set of books off a table and places them in the upper shelf of a book case which is 2 meters above the table. If she applies a force of 5 newtons to lift these books, what is the work done?
If a force of 5 newtons is applied to lift books 2 meters, the work done is 10 newton meters.
How work can be calculated?The formula for calculating work is Work = Force x Distance so for calculating work we have to multiply 2 meters with 5 newtons force then we get 10 newton meters.
So we can conclude that If a force of 5 newtons is applied to lift books 2 meters, the work done is 10 newton meters.
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From the calculations, the work done on the book is 10 J.
What is work?In science, work is said to be done when the force applied moves a distance in the direction of the force.
Given that;
Force applied = 5 N
Distance covered = 2 m
It the follows that the work done is;
W = F * d
W = 5 N * 2m = 10 J
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Which statement provides an environmental reason to use renewable paper bags instead of nonrenewable plastic bags?
Answer:
it's not easy to destroy plastics if we use nonrenewable plastics u will have to throw them and they will become poison to the insets
How do humans differ from chimpanzees?
Humans and chimpanzees are both mammals but they have characteristics that different or set them apart from each other. These characteristics include;
- Chimpanzees work on all four legs while humans walk on only two legs
- Chimpanzees avoid river/oceans because they do not know how to swim while humans can learn how to swim with constant practices
- The body of a chimpanzee is covered with thick hairs while humans do not have as much hair on the body
- Humans have an S shaped spine while chimpanzees have a C shaped spine
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Why is scientific knowledge more reliable than other types of knowledge?
A. Because false hypotheses are discarded, and results are peer reviewed by other experts to ensure accuracy.
B. Science is not more reliable.
C. Because science only uses facts that are proven 100% true through the use of variables.
D. Because scientists are more reliable than other people.
Answer:
C
Explanation:
Everything around us is all about science...We practice them everyday...All thanks to the scientists after so much examines,they let us know more about many things we don't know much about,they worked on them and improve them so that we can live a convenient life.
What telescope would be used to find a black hole?
Select one:
a.
Chandra
b.
Spitzer
c.
Compton Gamma Ray Observatory
d.
James Webb
the chandra telescope can be used to see blackholes
Chandra telescope would be used to find a black hole. Therefore, option (A) is correct.
The Chandra X-ray Observatory is a space telescope that was developed with the express purpose of detecting and researching X-ray emissions coming from various astronomical bodies. Observing the powerful X-ray radiation released from the neighbourhood of black holes, particularly their accretion discs and jets, has been an essential part of the process that led to the discovery of black holes and the investigation of their properties.
Because of the important new information it has uncovered about the characteristics and actions of black holes, Chandra has become an essential instrument in this field of study.
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suggest why a plant cell in 0.10 mol dm salt solution will not burst
Answer:
So, the correct answer is 'Cells wall is rigid and does not get overstretched'
Why do some codons code for the same
amino acid as another codon?
A. It is due to mutations.
B. There are only 20 amino acids and 64 possible
combinations.
C. Each codon is unique and they all code for different
amino acids.
Which thermoregulation strategy helped the hummingbird decrease its body
temperature?
a. flying
b. eating
c. basking in the sun
d. resting in the shade
submit
The thermoregulation strategy helped the hummingbird decrease its body
temperature is resting in the shade. Thus, option "D" is correct.
What is Thermoregulation?Thermoregulation itself is actually a branch of homeostasis. Homeostasis is defined as the internal regulation of body environment which includes the vital organs of the body such as the heart, liver, brain and contraction of skeletal muscles.
Thus, option "D" is correct.
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How is the law of conservation of mass applied to ecology?
Answer:
The laws of conservation of mass applies to ecology because the transfer of nutrients from organisms to the ground results in excess energy not disappearing
Answer: The law of conservation of mass states that the total amount of mass remains constant in a system. In ecology, this means that when an organism is eaten, its mass is conserved. Some of the organism’s mass is used to make new proteins, and some of it is passed as waste in the form of urine or feces. The rest is converted directly into energy. This energy helps the consumer to move and grow, and it helps it to build and repair new tissue.
Explanation: The written response for you guys
Axial skeleton (how many bones and what?)
Axial skeleton is composed of 80 bones in the body system.
What is Axial skeleton?
These are bones which are found in the central core of the body and examples include skull, vertebrae etc.
The axial skeleton comprises of 80 bones which perform various types of functions in the body.
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Which energy transformation occurs in the 2nd step of photosynthesis?
which type of study that a student is doing by exploring the external features of an animal
Answer:
analyzing behaviors of living animals with a common ancestry
analyzing embryos and skeletons of animals of the same species
analyzing DNA sequences and embryonic development
analyzing the the fossilized remains of animals from different time periods
When must personnel receive training to perform animal procedures?
The personnel must receive training to perform animal procedures before any procedures are performed on the animal.
What is animal care during experimentation?The animals used for research and experiments should be taken care of in. such a way that they can be replaced, reduced and refined.
According to the animal guide policy, any scientist that would use an animal for a research work would have to undergo a training before performing any procedures on the animal.
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Explain how the wall thicknesses are related to the functions of the chambers.
The explanation of how the heart wall thicknesses are related to the functions of the chambers are as explained below.
How to know heart wall thickness and chambers?Heart chambers are four hollow spaces within the human heart which are made up of two atria and two ventricles.
The thickness of the heart wall is related to the force of contraction required in the heart in the sense that the left ventricle which is the thickest wall contracts with the greatest force and creates the greatest amount of blood pressure in the heart chambers.
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Why are there 64 combinations of genetic codons for only 20 different amino acids?
Answer:
Because they all don't code for specific amino acids
Explanation:
Some of them don't code for Amino acids, instead, they code for directions. There are also amino acids that can be coded with multiple codons. this is why there are more codons than amino acids
which type of cells are spherical and contain energy molecules?
The type of cells that are spherical and contain energy molecules are fat cells
What is a fat cell?A fat cell is a connective cell in the body that is spherical in shape that is use to store and produce energy, fatty acids and help to store fat. Fat cells are a form of connective tissues in the body that generate ATP and also store fat in adipose tissue.
Therefore, The type of cells that are spherical and contain energy molecules are fat cells
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Which bronchus is about 5cm long and slightly narrower and more horizontal than the one on the opposite side?.
Answer:
Explanation:
left main bronchus
ASAPPPP EASYYYY ILL MARK BRAINLY
Select all direct effects increasing UVR have on animals?
is
a) reduces immunity to diseases
a direct effect increasing UVR have on animals
a. reduces immunity to diseases
The effect increasing UVR has on animals is reducing immunity to diseases.
What is UVR?A body could be heated to an incandescent temperature to generate UV radiation, which seems to be the case with solar UV, or an electric current would be sent through a gas, typically vaporized mercury, to generate UV radiation.
What are diseases?A disease would be a specific aberrant state that adversely affects an organism's structure as well as function on the whole or in part, and which could be not immediately brought on by any external trauma.
Therefore, the correct answer will be an option (a)
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What blood vessel is found in the anterior-medial thigh?
The blood vessel that is found in the anterior-medial thigh is the femoral artery.
What is the femoral artery?The femoral artery is a major blood vessel that transports blood from the abdomen to the lower limbs.
The femoral artery is fundamental because it transports high volumes of oxygen-rich blood.
In conclusion, the blood vessel that is found in the anterior-medial thigh is the femoral artery.
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which term describes an
enzyme?
Answer:
A biological catalyst
Explanation:
An enzyme is a biological catalyst and is almost always a protein. It speeds up the rate of a specific chemical reaction in the cell. The enzyme is not destroyed during the reaction and is used over and over.
Drag the tiles to the correct boxes to complete the pairs.
Match the factors affecting genetic diversity with the examples.
m. All rights reserved.
habitat fragmentation
pollution
exploitation
sewage from cities dumped into vers
sections of large forests cut down for resources
Burmese pythons Infesting the Everglades
rhinos Indiscriminately killed for their horns
▶ O GE
invasive species
101
N
Factors that affect genetic diversity are:
sewage from cities dumped in vers - pollutionsections of large forests cut by resources - habitat fragmentationBurmese pythons infesting the Everglades - invasive speciesrhinos indiscriminately killed by their horns - explorationWhat is genetic diversity of an example?
The diversity of alleles of individuals of the same species is what we call genetic variability.
Haireyeskin colorheight and voice,for example, are characteristics present in human beings that make us quickly understand that we have phenotypic variations in relation to others.
With this information, we can conclude that Factors that affect genetic diversity are: sewage from cities dumped in vers - pollution, sections of large forests cut by resources - habitat fragmentation, Burmese pythons infesting the Everglades - invasive species, rhinos indiscriminately killed by their horns - exploration
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Explain why the population of girls are more than that of boys in terms of variation.
Answer:
females have 2X chromosomes but males have one 1Y and 1X chromosome therefore if the male donates the x chromosome the baby will be a girl
What effect will a heterotropic activator have on a sigmoidal kinetic plot of V versus [S]?
An effect of a heterotropic activator on a sigmoidal kinetic plot of V₀ versus [S] is a shift to the left by the curve.
What is an enzyme?An enzyme refers to a biological catalyst that speeds up the rate of a chemical reaction, especially by lowering the activation energy of its chemical reactants.
In Science, a heterotropic activator is a regulatory molecule which serves as an activator of the enzyme. Thus, an effect of a heterotropic activator on a sigmoidal kinetic plot of V₀ versus [S] would be a shift to the left by the curve.
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what does the sympathetic and parasympathetic do ?
The sympathetic and parasympathetic are responsible for the body's spontaneous actions, such as breathing, heartbeat, digestion, body temperature control.
What is the function of the sympathetic and parasympathetic nervous systems?The sympathetic nervous system acts in an opposite way to the parasympathetic one, preparing the organism to react in situations of fear, stress and excitement, adapting the functioning of several internal systems to a high state of readiness.
In this case, the Sympathetic nervous system also controls body functions that are rarely conscious and parasympathetic nervous system the part of the autonomic nervous system responsible for stimulating actions that allow the body to respond to calm.
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In the overall process of glycolysis and cellular respiration, __________ is oxidized and __________ is reduced.
In the overall process of glycolysis and cellular respiration, glucose is oxidized and oxygen is reduced.
This whole process of oxidation and reduction is called aerobic respiration.
In this process glucose reacts with molecular oxygen to produce carbon dioxide and water, hence the carbon atoms in glucose are oxidized.
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Convert this measurement, 6.410102 , from scientific notation to standard notation.
This measurement, 6.410102 , is from scientific notation to standard notation. The answer will be 6.41
What is Scientific notation?Scientific notation is a way of writing numbers in two parts:
Only the figures (with the decimal point after the first digit), followed by × 10 to the power that moves the decimal point where you should be (that is, showing how many positions the decimal point moves).
On the other hand, the standard notation is the one that is normally used for not-so-large numbers by putting one digit behind another.
Thus, The answer will be 6.41.
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Which describes these molecules correctly
The correct description of the given molecule is C. Fatty Acid.
Why is this molecule a fatty acid?A typical fatty acid has a straight chain of carbon atoms. These atoms are then bonded with hydrogen atoms.
At the end of this line, there will be a -COOH bond and at the beginning, there is an H bond. This is what is depicted in the diagram so it must be a fatty acid molecule.
Options for this question include:
A. ribose
B. glucose
C. fatty acid
D. sucrose
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why do cell biologists study yeast?
Biologists study cells due to the cell relation to that of animal cell
What are yeasts?Yeast are eukaryotic organisms which are part of the fungus kingdom.
They are important to biologist because they tend too carry out all the functions of the eukaryotic cells and they are known to be closely related to animals
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