Hardness is a measure of how resistant solid matter is to various kinds of permanent shape change when a force is applied Macroscopic hardness is generally characterized by strong intermolecular bonds, but the behavior of solid materials under force is complex; therefore, there are different measurements of hardness: scratch hardness, indentation hardness, and rebound hardness. Hardness is dependent on ductility, elastic stiffness, plasticity, strain, strength, toughness, viscoelasticity, and viscosity. Common examples of hard matter are ceramics, concrete, certain metals, and super hard materials, which can be contrasted with soft matter.
Name two processes that require energy from ATP.
Select all that apply.
During melosis II:
chromosomes line up along the middle plate in double file
genetic variation results from crossing over
two diploid daughter cells are formed
sister chromatids split
four haploid daughter cells are formed
Answer:
chromosomes line up along the middle plate in double file
sister chromatids split
four haploid daughter cells are formed
Explanation:
Crossing over or recombination is the interchange of genetic material between non-sister chromatids. This process (crossing over) occurs during the prophase of meiosis I. Meiosis II is the second meiotic division that involves the separation of sister chromatids. In metaphase II, the centromeres of paired chromatids align on the equatorial plate of each daughter cell to be subsequently separated in anaphase II. At the end of meiosis II, four daughter cells are formed (i.e., four gametes), each with the same haploid number of chromosomes.
How do frogs and toads, as well as salamanders, typically protect themselves from predators?
by injecting venom into the predator using teeth
by crawling or hopping to a safe place
by squeezing the predator to suffocate it
O by rolling over and pretending to be dead
Answer:
by crawling or hopping to a safe place
Explanation:
Most Amphibians like frogs, road, salamander protect themselves from predator by hopping and crawling to a safe place because they have the ability to puff out and look bigger in the sight of the predator. They can also remain underneath in water quietly for a long time. For example frog secrete moisture which sometimes it is irritating to the predators and serve as a defensive mechanism.
Answer:
Answer:
by crawling or hopping to a safe place
What is oxygen and how would you describe it ?
Answer:
Oxygen is a colourless, odourless, tasteless gas essential to living organisms, being taken up by animals, which convert it to carbon dioxide; plants, in turn, utilize carbon dioxide as a source of carbon and return the oxygen to the atmosphere.
In what section would the following statement be located in a lab report: “My experiment tested the efficiency of chelation in treating atherosclerosis by examining the effect of EDTA on egg shells.”?
Aim but it needs to reworded
Aim: To test the efficiency of chelation in treating atherosclerosis by examining the effect of EDTA on eggshell
Someone please help me
Answer:
I'm pretty sure it's volume
Smokers, alcohol abusers, overweight and obesity men are more
likely to have sperm which are?
Answer:
fewer in number.
Explanation:
A low sperm count also known as oligospermia can be defined as a medical condition which typically involves a man (adult male) having fewer than 15 million sperm per millilitre of semen.
Basically, low sperm count (oligospermia) is usually caused in men due to health and lifestyle factors such as smoking, alcohol or drug abuse, obesity, genetics, sexually transmitted infections (STIs), age etc.
Hence, smokers, alcohol abusers, overweight and obesity men are more likely to have sperm which are fewer in number i.e fewer than 15 million sperm per millilitre of semen.
Generally, a healthy or normal sperm motility ranges from over 20 million to 200 million sperm per millilitre of semen.
29. Which of the following occurs throughout most
of a star's lifetime?
A. matter ejection
B. gas contraction
C. heavy core formation
D. nuclear fusion

A change in DNA could alter the amino acid order which will affect the folding of the protein, and therefore it's function. True or false
Answer:
true
Explanation:
amino acids are complex macromolecoules therefore it would alter the genetic structure of the compound thus changing its dna
_______measure air temperature and _______measure air pressure.
Answer:
thermometer and barometer
Explanation:
because
a thermometer has a dry bulb that measures the air temperature
and
the most common instrument used to measure air pressure is a barometer
Fiona wants to use the scientific method to answer the question "Do oxygen levels in the air of photosynthesis?" She reads about photosynthesis in her biology book and is ready to carry the next step. should she do next? O perform an experiment design a procedure make observations a hypothesis
Answer: hypothesis, prediction, design experiment, carry out experiment, etc
Explanation:If the question is supposed to be, is there a connection between atmospheric oxygen level and photosynthesis, then the next step would be to frame the hypothesis, which could be, for example,
“photosynthesis requires oxygen”, and a prediction such as,,
in a closed system, photosynthesis will reduce the oxygen level, or even photosynthesis does not proceed without oxygen.
and a format to test the hypothesis (design an experiment)
perform the experiment
collect data
analyse data
(of course, in this case, the data will support the null hypothesis).
Answer:
The correct answer is D!:)
Explanation:
Hope this helps!:)
Can you help me with this please it’s science
Answer:
A
Explanation:
a
Describe how rodent and human skeleton's are similar in structure and function.
Please help, ill give brainliest:))))
Answer:
Both a human and rodent skeleton have skulls, but they aren't much alike. Both the human and rodent skeleton need calcium to keep their bones strong. Both a human and rodent skeleton have 24 ribs, these are used to protect vital organs.
HELPPPPPPPP
What is the amplitude?
A. the distance from the center of the wave to the crest or the trough.
B. The distance between the two crests
C. The highest point in the wave
D. The lowest point in the wave
The distance from the center of the wave to the crest or the trough, hence option A is correct.
What is amplitude?It alludes to the greatest departure from equilibrium that an item in periodic motion may exhibit. As an illustration, consider how a pendulum moves through its equilibrium point (straight down) and then moves outward to its maximum extent.
Measure the largest displacement of a point in the wave's medium from its resting position to determine its wavelength. Measure the length of the wave's cycle, generally from peak to crest or trough to trough, to determine its amplitude.
Think about how a pendulum travels through its equilibrium point (straight down) and then goes outward to its farthest point as an illustration.
Therefore, the distance from the center of the wave to the crest or the trough, hence option A is correct.
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Someone please help me
Answer:
its c do that to
Explanation:
Answer: Grams is not a unit of volume its a unit of mass
Round (R) is dominant over wrinkled (r) and
Green (Y) is dominant over (y) yellow. Cross the
following and express the phenotypic and
genotypic ratios. RrYy and rrYy
produce the eggs or ova
Explanation:
yes produce the eggs and ova
The ovaries produce the egg cells, called the ova or oocytes.
Cells in the nervous system act independently, but cells in the circulatory system function together.
Answer:
Cells in the nervous system are different in structure from cells in the circulatory system, and they carry out different specialized functions.
Explanation:
Answer:
it is because here full co ordination is required
Explanation:
What impact could artificially raising the carrying capacity have on the deer
population long term?
Answer:
Deer population increases.
Explanation:
Deer population increases if increasing occur in carrying capacity of an ecosystem by artificial means because more food, water, shelter and other resources are available to the deer due to increasing carrying capacity of an ecosystem. If food, water and shelter are available in large amount to the deer so they reproduce rapidly and increase occur in their population.
Please help! Need it for my homework
Answer:
melanocortin 1 receptor
Explanation:
The MC1R gene provides instructions for making a protein called the melanocortin 1 receptor. This receptor plays an important role in normal pigmentation. The receptor is primarily located on the surface of melanocytes, which are specialized cells that produce a pigment called melanin.
hope it's help
In humans, hemophilia is sex linked. If a woman is a carrier for the trait, what is the chance that her daughters will also be carriers? (Assume their father is normal.)
Help me ASAP
What happens to the actin and myosin during a muscle contraction?
•The actin filaments push against the myosin filaments, making the myosin filaments smaller
•The actin filaments are forced inward by the flexing of the muscle
•The myosin filaments remain in place as they pull the actin filaments inward
•The myosin filaments compress the actin filaments, making the actin filaments smaller
Answer:
C, The myosin filaments remain in lace as they pull the actin filaments inward
Explanation:
Muscles contract when the heads on the myosin filaments latch onto the actin filaments, drawing them inward. As a result, the entire sarcomere shortens, resulting in a muscle contraction.
The myosin filaments remain in place as they pull the actin filaments inward. The correct option is C.
Thus, Actin filaments are drawn inward as a result of the myosin heads cycling and attaching to fresh binding sites, which causes the muscle to contract.
Multiple sarcomeres within muscle fibres engage in this process simultaneously, which causes the entire muscle to contract.
In conclusion, during muscle contraction, actin filaments are actively pulled inward by myosin filaments, specifically the myosin heads, by the sliding filament mechanism. Muscle contraction and movement depend on the coordinated action of myosin and actin filaments.
Thus, The myosin filaments remain in place as they pull the actin filaments inward. The correct option is C.
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can someone please help me out on this :,,,) I’ll fail if I get this wrong
Answer:
1. plant chlorophyll
2. energy 3.molecules 4.oxygen 5.carbon dioxide 6.hydrogen 7. sugar molecules
please answer this nicely.
If you'll be given a chance to choose what energy to use either GEOTHERMAL ENERGY or SOLAR ENERGY, what energy would you pick and why?
Find an
equivalent ratio in simplest terms
90 : 14
Answer:
45:7
Explanation:
12.
Which statement correctly distinguishes the functions of lipids from other types of biomolecules?
F.
They are used to store genetic information.
G.
They help with the regulation of blood glucose.
H.
They are a major component of cell membranes.
J.
They are made up of several different amino acids.
Answer:j
Explanation:
The statement that correctly distinguishes the functions of lipids from other types of biomolecules is: They are a major component of cell membranes.
BIOMOLECULES:
There are four major biomolecules in nature and they are carbohydrates, proteins, lipids, and nucleic acids. Each biomolecule perform specific functions in a living system. Some major functions of each biomolecule are as follows:Proteins: They are involved in the repair of tissues and regulation of biochemical activities. Carbohydrates: They are involved in the storage and supply of energy for cell's. Nucleic acids: They are involved in the storage and transmission of genetic information in living cells. Lipids: They are major component of the cell membrane of living organisms. Therefore, the statement that correctly distinguishes the functions of lipids from other types of biomolecules is: They are a major component of cell membranes.Learn more at: https://brainly.com/question/3498396?referrer=searchResults
Do You Think Their DNA Is Different From A Person Who Does Not Have DMD ?
Answer:
arriers may not have any disease symptoms but can have a child with the ... A good way to find out more about the inheritance pattern in your family is to talk to ... one parent, she usually also gets a healthy dystrophin gene from her other ... at a Glance · Creating a New Therapy · What We've Achieved · MOVR Data Hub
Explanation:
Which one is Convection? Warm air rising, Heat from an old-fashioned radiator, Batteries, and Touching a stove and burning your hand WHich one is it???????
Answer:
mnhjvcfhvnbkjhjgvhn bm,ljhgfvjbmn,jhkgjfvnb mn,jhkgjfhcvb nbvcgfmhjbk
Explanation:
what should be done to preserve the forest
Answer:
To preserve the forest:
one should take part in awareness program
there should be a increase in afforestation
people should be careful with crackers and fire
People should be educated and aware of the things that can happen if trees are cut daily
Hope it helps:)
In science writing, what is the purpose of historical points of reference?
to help readers connect prior knowledge to new discoveries
to help readers sympathize with past scientists
to help readers understand an especially difficult concept or idea
to help readers understand the complete history of a scientific idea
Answer:
to help readers connect prior knowledge to new discoveries
Explanation:
Since scientists are always making new studies and or discoveries, it is important that the readers understand how prior information has changed and how it has improved since the past. This could also allow for the readers to learn about new inventions and new procedures these scientists have used to upgrade previous discoveries or to create new ones.
Hope this helped!
In science writing, what is the purpose of historical points of reference to help readers connect prior knowledge to new discoveries. Thus option A is correct.
what is science writing ?
The science writing is defined as the writing about a scientific subject matter in a non-technical manner for an audience of non-scientists called popular science writing.
Science writing may refer to writing that reports of scientific observations and results are obtained in a manner governed by specific conventions. More commonly known as scientific writing.
scientists are always make new studies and or discoveries, it is important that the readers understand how prior information has changed and how it has improved since the past.
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