The physical properties of graphite which makes it good for pencils is ;
( 3 ) hardness and streak
Graphite is made up of carbon atoms which are held together by van der waals forces ( weak force ). They are soft and slippery which is why graphite is used in the manufacture of lubricants. while graphites are used for the manufacture of writing materials such as pencils because of its hardness and streak
Hence we can conclude that the physical properties of graphite which makes graphite good for the production of pencils are hardness and streak
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__________Are the subunits making up nucleic acids
Answer:
Nucleotides.
Explanation:
Nucleic acids (DNA, RNA) are large polymers, made out of monomer building blocks called nucleotides. The nucleotides have a similar structure with three 'subunits': A phosphate group
The nucleus of the cell is similar to the_______ system of the body.
The nucleus of the cell is similar to the Neurological system of the body.
What is Nucleus?According to the Cell Biology, nucleus may be a membrane found in organism cells.
The nucleus contain all of the cell's ordering except mitochondrial DNA and in plant cell, Plastid DNA.
Nuclear DNA is organized as multiple long linear molecules in a very complex form with a large variety of proteins, like histones, to make chromosomes.
The nucleus maintains the integrity of sequences and controls the activities of the cell by regulation gene expression—the nucleus is, therefore, the control center of the cell
The nucleus contains nearly all of the cell's polymer, enclosed by a network of fibrous intermediate filaments and enveloped in an exceedingly double membrane referred to as the "nuclear envelope".
The nuclear envelope separates the fluid within the nucleus, referred to as the living substance, from the remainder of the cell. The scale of the nucleus depends on the scale of the cell it's contained in, with a nucleus usually occupying 8% of the whole cell volume.
The nucleus is the largest organelle in animal cells.
For example- In mammalian cells, the average diameter of the nucleus is approximately 6 micrometers (µm).
What is Neurological System or Nervous System of the body?The Nervous system could be a extremely advanced a part of associate degree animal that coordinates its actions and sensory data by sending signals to and from completely different components of its body.
In vertebrates it consists of 2 main components, the central system (CNS) and therefore the peripheral system (PNS). The CNS consists of the brain and neural structure.
The function of the system is to send signals from one cell to others, or from one a part of the body to others and to manage the body.
It will this by extracting data from the setting exploitation sensory receptors, causing signals that encrypt this data into the central system, process the data to work out associate degree applicable response, and causing output signals to muscles or glands to activate the response.
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Explain why fabrics made with elastic fibre with the trade name “lycra’ are extensively used in foundation garment industry today. You may use their special characteristics and properties.
Answer:
Fabric name
Lycra
Fabric also known as
Spandex, elastane
Fabric composition
Polyether-polyurea copolymer
Fabric breathabilityn
High breathability
Moisture-wicking abilities
High
Heat retention abilities
Low
Stretchability (give)
Extraordinarily high
Prone to pilling/bubbling
High
Country where fabric was first produced
United States
Biggest exporting/producing country today
China
Recommended washing temperatures
Warm or cold
Commonly used in
Underwear, socks, bras, sports bras, bike shorts, yoga pants, hiking apparel, motion capture suits
#hope this helps u some #
When neuroscientists employ the term "nucleus", they are usually referring to:_____.
a. a cluster of glial cells in the dorsal-medial CNS.
b. a neural unit composed of anatomically and functionally related neurons.
c. a group of homologous ganglia located either in the cortex or in the cerebellum.
d. cognitively synchronized clusters of apical dendrites anywhere in the PNS.
Answer:
B. A neural unit composed of anatomically and functionally related neurons.
What variable should Anurag change in his experiment
Answer:
For geological carbon sequestration, the reaction of aqueous CO2 with silicate rock permits carbonate formation, achieving permanent carbon sequestration.A
Explanation:
The meaning of ALARA in radiation?
Answer:
The guiding principle of radiation safety is “ALARA”. ALARA stands for “as low as reasonably achievable”.
Human being get energy from
You are studying an enzyme that is inactivated by phosphorylation and create a mutant in which the threonine that is normally phosphorylated is replaced with glutamate. Predict the impact of this change on the activity of this enzyme. Group of answer choices
Answer:
always active
Explanation:
Phosphorylation is a posttranslational modification that consists of the addition of phosphate groups to specific amino acids on the protein. Phosphorylation acts as a molecular switch for proteins that are phosphorylated (i.e., in some situations phosphorylation acts to activate protein function, whereas in other situations phosphorylation can inactivate protein function). Phosphorylation modifies the three-dimensional structure of the protein, thereby affecting, for example, the accessibility of the active site of a phosphorylated enzyme to its substrate. Phosphorylation can occur only at the side chains of three amino acids: Serine, Threonine and Tyrosine. In this case, the enzyme is inactivated by phosphorylation on the Threonine residue, so it is expected that the mutant enzyme cannot be phosphorylated, remaining in an active state.
Please help me with these questions
I will mark the Brillianest
Answer:
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Which of the following does NOT relate to water?
A. Dehydration damages cells.
B. 70% of the human body.
C. Controls negative feedback mechanisms.
D. Contains and moves ions in and out of cells.
The following that does not relate to water is it contains and moves ions in and out of cells. The correct option is D.
What is water?Water is a chemical compound made up of hydrogen and oxygen. It is a necessary part of life. As our body is made up of 90% of water, and without water, organisms would not survive.
The transport of ions and molecules in and out of the cell is done by the cytoplasm filling in the cell.
Thus, the correct option is D. Contains and moves ions in and out of cells.
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HELP ASAP PLEASE HELP FAST
According to cell theory, all new cells...
A. must share DNA with existing cells.
B. must eat.
C. come from other cells.
Answer:
с
Explanation:
all new cells come from other cells
What does a botanist study
Answer:
Botany is the scientific study of plants—how plants function, what they look like, how they are related to each other, where they grow, how people make use of plants, and how plants evolved.
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What are the types of honey bee?
Answer:
kdjjdndkskkdjckfkfjsjjsjsmslaldjnxjcjc
Determine the correct energy transformations during the generation of electricity from fossil fuels.
A. Heat to Chemical to Electrical to Kinetic
B. Heat to Kinetic to Electrical to Chemical
C. Kinetic to Chemical to Heat to Electrical
D. Chemical to Heat to Kinetic to Electrical
Answer:
D. Chemical to heat to kinetic to electrical
The correct energy transformations during the generation of electricity from fossil fuels are D) Chemical to Heat to Kinetic to Electrical
What converts chemical energy to kinetic energy to electrical energy?
Batteries used in torches, computers, toys, and camera cells, are actually made up of chemical cells which convert the chemical energy from the batteries to the electrical energy required for the devices to work well.
What are the main energy types?Examples of these are light energy, heat energy, mechanical energy, gravitational energy, electrical energy, sound energy, chemical energy, nuclear or atomic energy, and so on. Each form can be converted or changed into the other forms.
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When thinking about all 4 types of macromolecules discussed, which of the following statements are true? Select all that apply.
Monomers are linked together by hydrolysis.
Monomers are joined together to form functional polymers
Monomers are linked together by dehydration synthesis.
Monomers join together via hydrogen bonds.
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Contrast the usefulness of absolute and relative dating techniques.
Answer:
In relative dating, fossils are dated according to the depth at which they were buried While in the absolute dating, isotopes of carbon are used for dating fossils. The absolute dating is more precise than relative dating because it tells the exact age of the fossils.
Why can viruses not fit in any domain? How are they different from all other forms of Life? What would need to occur for viruses to be classified as "alive"?
Answer:
virus are obligate parasites. Viruses do not, however, carry out metabolic processes. Most notably, viruses differ from living organisms in that they cannot generate ATP.
When an outbreak of foot and mouth disease is discovered among livestock in a country, what is MOST likely the chosen way to control it?
Answer:
You can get infected with hand, foot, and mouth disease if you have the virus on your hands and then touch your eyes, nose, or mouth. To lessen your chance of getting sick, don't touch your eyes, nose, and mouth with unwashed hands.
You can get infected with hand, foot, and mouth disease if you have the virus on your hands and then touch your eyes, nose, or mouth. To lessen your chance of getting sick, don't touch your eyes, nose, and mouth with unwashed hands.
What are the mechanism that use to resist the antimicrobial agents?There has been several mechanisms, like resistance to antimicrobial agents, encapsulation or secretation of proteins that affects and might destroy the phagocyte along with some leukocytes in our body perform phagocytosis as a defense mechanism against the pathogenic bacterium.
These phagocytes contain lysosomes, intracellular granules that possess bactericidal substances. When the phagocyte ingests the pathogen, a phagosome is formed, which merges with the lysosome, forming the phagolysosome, which is where toxic substances and enzymes kill the ingested microorganism.
There are several mechanisms by which a microorganism can survive this process as resistance to antimicrobial agents. Some bacteria use phenolic glycolipids from their cell wall, to eliminate toxic oxygen compounds.
Therefore, You can get infected with hand, foot, and mouth disease if you have the virus on your hands and then touch your eyes, nose, or mouth.
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what gender of offspring are most often affected by sextinked inheritance?-What gender-are-usmally-carriers-of the trait?
-males, males
-males, females
-females, females
-females, males O O
Answer:
female, female
Explanation:
this is because sex-linked characters are normally borne in the X-chromosome
Which is our body part help us to maintain balance.
Answer:
cerebellum
Explanation:
The cerebellum is a small part of the brain positioned at the back of the head, where it meets the spine, which acts as the body's movement and balance control centre.
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Tai không chỉ có vai trò để lắng nghe mà còn hỗ trợ trong việc giữ cân bằng
Scenario 1:
Genetic engineering can be used to create more productive strains of farm animals used for milk and meat production. By adding genes to an animal’s DNA, the animal can be made to be more resistant to common infections. This can reduce the need to administer large doses of antibiotics to the animals.
Do you think that this type of genetic engineering should be pursued? Explain your answer. (5 points)
What are some possible impacts (positive and negative) of this type of genetic engineering on individuals, society, and the environment? (5 points)
Scenario 2:
Mike was adopted, and his biological family history is unknown. Although he is healthy, he would like some understanding of his genetic makeup, including potential health risks and genes that he could pass on to his children. Mike has heard about commercial laboratories that can compare segments of your DNA to those of people with common hereditary diseases in order to give you some idea of how susceptible you are to the diseases. The results of these types of tests are highly inconclusive. If Mike’s DNA showed that he shares similarities in a segment of DNA with people who have a given disease, his chances of developing that disease or passing it on to his children may be slightly elevated, but they are not 100 percent. These tests can cost more than $2,500 and are not covered by many insurance companies.
Do you think that Mike should undergo the genetic tests? Explain your answer. (2 points)
What are potential pros and cons of having such tests done? (5 points)
Describe how the availability of these genetic tests might affect the frequency of genetic diseases in individuals and populations. (3 points)
Due to brainly not accepting my essay, I have instead included a image of it. :D
For each of the following structures, first indicate its function in the fetus; then, note its fate (what happens to it or what it is converted to after birth).
a. Umbilical artery
b. Umbilical vein
c. Ductus venosus
d. Ductus arterious
e. Foramen ovale
Answer:
1. Functions:
a. Umbilical artery >> carries deoxygenated blood from the fetus to the placenta
b. Umbilical vein >> transports oxygenated blood from the placenta to the fetus
c. Ductus venosus >> allows oxygenated blood from the placenta to bypass the liver
d. Ductus arterious >> allows most of the blood from the right ventricle to bypass the fetus's non-functioning lungs
e. Foramen ovale >> oxygenated blood from the umbilical vein to bypass the pulmonary circulation
2. After the bird:
1. Umbilical artery >> medial umbilical ligament
2. Umbilical vein >> round ligament of the liver
3. Ductus venosus >> ligamentum venosum
4. Ductus arteriosus >> ligamentum arteriosum
5. Foramen ovale >> fossa ovalis
Explanation:
The umbilical artery is a paired artery localized in the abdominal and pelvic regions, which carries deoxygenated blood from the fetus to the placenta through the umbilical cord. The medial umbilical ligament is the obliterated part of the umbilical artery that arises from the internal iliac arteries. In utero, the umbilical arteries carry waste products back to the placenta, whereas the umbilical vein carries oxygenated blood from the placenta to the fetus. The round ligament of the liver (also known as ligamentum teres hepatis) is a remnant of the umbilical vein that exists in the embryonic stage, it connects the left lobe of the liver to the umbilicus. The ductus venosus is a slender shunt that allows oxygenated blood from the placenta to bypass the liver, it connects the intra-hepatic portion of the umbilical vein to the inferior vena cava. The ligamentum venosum is an extrahepatic, slender, and fibrous remnant of the fetal ductus venosus that travels between the left portal vein and the inferior vena cava. The ductus arteriosus is a fetal artery that connects the aorta to the pulmonary artery. The ligamentum arteriosum is a nonfunctional vestige of the ductus arteriosus, it is attached to the superior surface of the pulmonary trunk. The foramen ovale is an oval-shaped, small, opening in the wall (septum) between the two upper chambers of the heart. The fossa ovalis is a vestige stricture of the foramen ovale of the embryonic heart, which forms a depression in the right atrium of the heart.
Which statement is not true about the field of science?
it is based on observations and explanations of the natural world.
You are right with your answer please
Actual Question:
Which statement about the purpose of the field of science is false? (1 point)
Science is used to investigate the natural world.
Events of the natural world can be explained by science.
Science works to establish a collection of unchanging truths.
Useful predictions come from derived explanations of science.
Answer:
Science works to establish a collection of unchanging truths.
Explanation:
I took the test
The second generation of purebred cross of -hom-ozygo us recessive organism, with a —hom-ozygous dominant organism, contain a ratio of approximately _______ expressed dominant traits to recessive traits.
A. 2:1
B. 1:1
C. 1:3
D. 3:1
Answer:
D. 3:1
Explanation:
Gregor Mendel, in one of his numerous studies, performed a cross between purebred dominant (TT) pea plants and purebred recessive (tt) pea plants. All the offsprings of this cross appeared heterozygous tall (Tt) in the F1 generation.
However, when he self-crossed the F1 generation i.e. Tt × Tt, Mendel obtained a phenotypic ratio of 3 tall plants (dominant traits) : 1 short plant (recessive). This showed that the masked gene (recessive) was still present.
1. Sensation is to as perception is to a. vision, olfaction b. conscious, unconscious c. awareness, interpretation d. taste, vision.
Answer:
opt (c)
Explanation:
The large number of alveoli in lungs improve gas exchange by ________. increasing the surface area for diffusion decreasing the distance for diffusion changing the diffusion constant increasing the concentration difference
Answer:
Explanation:
The large number of alveoli in lungs improve gas exchange by . increasing the surface area for diffusion
In butterflies, having red antennas (denoted by “R”) is dominant to having white antennas (denoted by “r”). If both parents are heterozygous for red antennas, what are the predicted Phenotypic outcomes of their offspring? (hint: a punnett square will help you determine this).
In butterflies, having red antennas (denoted by “R”) is dominant to having white antennas (denoted by “r”). If both parents are heterozygous for red antennas, what are the predicted Genotypic outcomes of their offspring? (hint: a punnett square will help you determine this).
All the offspring of a cross between a black-eyed mendelien and an orange-eyed mendelien have black eyes. What is the expected F2 phenotypic ratio of a cross between two F1 black-eyed mendeliens?
A) 1 black-eyed:1 orange-eyed
B) 3 black-eyed:1 orange-eyed
C) 1 black-eyed:3 orange-eyed
D) 1 black-eyed:0 orange-eyed
The phenotypic ratio of the cross is as follows: 3 red antennas: 1 white antenna
For question 2, the phenotypic ratio of the F2 generation is: 3 black-eyed: 1 orange-eyed
QUESTION 1
According to the first question, a gene coding for antenna color in butterflies is involved. Red antennas (“R”) is dominant to white antennas (“r”). Hence, a butterfly with genotype "Rr" will be phenotypically red.
According to this question, If both parents are heterozygous for red antennas i.e. Rr (red antenna) × Rr (red antenna), the following gametes will be produced: R and r. Using these gametes in a punnet square (see attached image), the following phenotypic ratio of offspring is produced:
3 RED ANTENNAS (RR, Rr, Rr) : 1 WHITE ANTENNA (rr)
2. In the second question, all the offspring of a cross between a black-eyed mendelien (BB) and an orange-eyed mendelien (bb) have black eyes (Bb). In a cross between two F1 black-eyed mendeliens i.e. Bb × Bb, the following proportion of offspring is produced:
BB, Bb, Bb, bb
Hence, a phenotypic ratio of 3 black-eyed: 1 orange-eyed
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What is a major role that fungi play in ecosystems
Answer:
Fungi play a crucial role in the balance of ecosystems. They colonize most habitats on earth, preferring dark, moist conditions. They can thrive in seemingly-hostile environments, such as the tundra. However, most members of the Kingdom Fungi grow on the forest floor where the dark and damp environment is rich in decaying debris from plants and animals. In these environments, fungi play a major role as decomposers and recyclers, making it possible for members of the other kingdoms to be supplied with nutrients and to live.
Explanation:
Answer from Gauth math
Porque crees que las personas llegan a consumir sustancias psicoactivas
Answer:
La causa exacta del consumo de drogas se desconoce. Los genes de una persona, la acción de las drogas, la presión de compañeros, el sufrimiento emocional, la ansiedad, la depresión y el estrés ambiental pueden ser todos factores intervinientes.
Explanation:
