Which mineral test is shown in the image?
Answers
Hardness mineral test is shown in the image. The right answer is c.
The hardness of a mineral is a measure of its resistance to scratching or abrasion. It is one of the fundamental physical properties used to identify and classify minerals. The most commonly used scale for testing mineral hardness is the Mohs Scale of Hardness, which was developed by Friedrich Mohs in 1812.
The scale ranks minerals from 1 (the softest) to 10 (the hardest) based on their ability to scratch each other. Talc, with a hardness of 1, is the softest mineral and can be easily scratched by a fingernail while Diamond, is at the top of the scale with a hardness of 10, is the hardest mineral and can scratch all other minerals.
The correct answer is option c.
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The question seems incomplete. The complete question is:
Which mineral test is shown in the image?
a. Public Domain
b. Specific gravity
c. Hardness
d. Cleavage
Related Questions
A fly has two alleles for the color of its eyes. the green allele is recessive and is represented by q. the blue allele is dominant and is represented by p. if 44 of 100 organisms are green, what is p?
Answers
So
p+q=1(when u have 2 alleles)
0.44 of the population has recessive phenotype so is q^2.
q=radq^2=rad0.44=0.663
p=1-q=0.336=0.34
Answer:
[tex]p = 0.34[/tex]
Explanation:
Given -
Green allele is recessive and is represented by "b"
Blue allele is dominant and is represented by "B"
Also out of [tex]100[/tex] organisms, [tex]44[/tex] are green in color. Thus, all these [tex]44[/tex] organism would have genotype "bb"
As per Hardy Weinberg's equation , frequency of "bb" is represented as [tex]q^{2}[/tex]
Thus frequency of allele "b" would be equal to
[tex]\sqrt{q^{2} }[/tex]
[tex]= \sqrt{\frac{44}{100} } \\= \sqrt{0.44} \\= 0.66[/tex]
As per first equation of Hardy Weinberg-
[tex]p+q=1[/tex]
Frequency of allele "B" will be equal to
[tex]p = 1-q[/tex]
Substituting the value of q, we get
[tex]p = 1-0.66\\p = 0.34[/tex]
can any one help?????
Answers
Answer:
D
Explanation:
Just remember immigration the i= into
emigration the e=exit
Hope this helps??
which best describes meiosis?
A. it produces cells that are identical to the original cell
B. it is responsible for the replacement of damaged skin cells
C. it is responsible for growth of the organism
D. it produces male and female sex cells
Answers
Answer:
It is: D. it produces male and female sex cells.
Explanation:
Answer:
D. it produces male and female sex cells
Explanation:
Hope this helps!
Which helps prevent errors in DNA replication?
Answers
Answer:
Complementary base pairing
Explanation:
The DNA replication is the process by which one DNA makes exact copies of it during the cell division.
The attachment of bases to one another is complementary which means that the adenine will always combine with thymine and guanine always pairs with the cytosine.
Answer: Complementary base pairing reduces errors) is the answer
Explanation:
I am doing the apecx test i spelled it wrong because it says that it is inappropriate.
It is not possible for global warming to have any positive side effects. Please select the best answer from the choices provided T F
Answers
the answer is F. there is a brightside to everything no matter how small
Answer: False
Explanation:
The global warming is a phenomena in which the increase in the abundance of greenhouse gases like carbon dioxide, methane, water vapor, nitrous oxides and ozone results in the rise in the average temperature due to the fact that these gases trap heat from sunlight. This affects the change in the climatic condition of a region. This entire phenomena is called as greenhouse effect. This results in the melting of glaciers, acidification of oceanic water and other problems.
The positive effects of global warming includes increase in carbon dioxide gas will increase the rate of photosynthesis which may lead to increase in productivity of crops, and increase in planktonic biomass in ocean.
How does interphase prepare cells for mitosis
Answers
Final answer:
Interphase prepares a cell for mitosis through its three stages: the G1 phase, where the cell grows and accumulates resources; the S phase, where DNA is replicated; and the G2 phase, where the cell continues to grow and checks DNA replication readiness. This ensures a healthy cell division.
Explanation:
Interphase Prepares Cells for Mitosis
Interphase is critical for preparing a cell for mitosis. This phase consists of three stages: G₁ (First Gap), S (Synthesis), and G₂ (Second Gap).
The G₁ phase is marked by intense biochemical activity where the cell accumulates the building blocks of chromosomal DNA, related proteins, and energy reserves. During the S phase, the cell synthesizes a complete copy of the DNA in its nucleus. This DNA replication is essential for providing each daughter cell with an identical set of chromosomes during mitosis. In the G₂ phase, further growth occurs, and the cell ensures all the DNA is replicated and begins to reorganize its contents to prepare for mitosis. These steps are crucial as they ensure that the cell is ready to enter the mitotic phase where cell division will occur, resulting in the formation of two genetically identical daughter cells.
In animal cells, an additional preparatory event occurs: the duplication of the centrosome, which is vital for the later stages of mitosis, ensuring that the cell's cytoskeleton is properly organized for division.
what causes the atmosphere to be unequally heated by the sun?
a. the jet stream
b. local winds
c. earths tilted axis
d. el niño
Answers
Answer:
C
Explanation:
The Earth's tilted axis is the primary reason for unequal heating of the atmosphere by the sun. This tilt causes different amounts of sunlight to reach different latitudes throughout the year, leading to seasonal variation in climate.
Explanation:The primary factor that causes the atmosphere to be unequally heated by the sun is the tilt of the Earth's axis. This tilt, amounting to roughly 23.5 degrees relative to its orbit around the Sun, creates different zones of climate on the planet by causing differing amounts of sunlight (and hence, heat) to reach different latitudes throughout the year.
When the Earth's axis tilts towards the Sun, it's summer for that pole, and winter when it tilts away. This is the reason for seasonal variation in climate. Factors like the jet stream, local winds, and El Niño can further modify local weather conditions, but the unequal heating is primarily due to the Earth's tilted axis.
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What is a group of organisms that are closely related and share similar characteristics a) species B)genus c)taxonomy D) similar organisms
Answers
Answer: b genus
Example: homo sapiens and homo neanderthalus. diffrent species same genus
Final answer:
A group of closely related organisms that share similar characteristics is known as a species. This classification is based on the capability of organisms to exchange genes, interbreed, and produce fertile offspring, indicating significant genetic similarity and morphological traits in common. Taxonomy classifies these organisms into hierarchical categories, with species being the most specific.
Explanation:
A group of organisms that are closely related and share similar characteristics is known as a species. Members of a species are capable of exchanging genes or interbreeding and they produce viable, fertile offspring. These organisms share significant genetic similarities, and their classification within this group suggests they can generate fertile progeny with each other and have an adequate number of morphological traits in common.
When it comes to taxonomy, organisms that are a part of the same clade have evolved from a shared ancestor. This indicates a close evolutionary relationship, and clades are groups of organisms that are classified together based on this concept in phylogenetic classification systems.
Moreover, one of the strongest arguments supporting that two organisms, A and B, are closely related evolutionarily is if the DNA sequences of A and B are highly homologous. This genetic homology points to a common ancestry and shared evolutionary paths.
In the context of taxonomy, the taxonomic classification system uses a hierarchical model to organize living organisms, where each sublevel indicates that the organisms are more similar to each other. The broadest category in this system is the domain, which is then followed by more specific categories such as kingdom, phylum, class, order, family, genus, and ends with species being the most specific.
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Which is the correct balanced equation that shows the process of iron oxide (Fe2O3) explosively combining with aluminum (Al) to produce iron (Fe) and aluminum oxide (Al2O3)?
A.
Fe2O3 + Al → Fe + Al2O3
B.
Fe2O3 + 3Al → 3Fe + Al2O3
C.
Fe2O3 + 2Al → 2Fe + Al2O3
D.
2Fe2O3 + 2Al → 2Fe + 2Al2O3
Answers
Answer:
C. Fe2O3 + 2Al → 2Fe + Al2O3
Why do mutations in genes affect traits?
O
A. Genes determine what type of mutagens an organism has.
O
B. Genes produce proteins that cause traits.
O
C. Genes affect how many chromosomes an organism has
O
D. Genes code for carbohydrates that influence traits.
Answers
Answer:
B. Genes produce proteins that cause traits
Explanation:
A P E X
what is a specific technique used to produce gmo tomatoes
Answers
Answer:to reduce the amount of bug that are in the fruit
Explanation:
Question 9 (5 points)
The iron triad of transition metals includes____
iron, zinc, and copper
cobalt, iron, and nickel
copper, silver, and gold,
zinc, cadmium, and mercury
Answers
Answer:
b. cobalt, iron, and nickel
Explanation:
Answer:
It's "Iron, Cobalt, and Nickel."
Explanation:
Hope my answer has helped you!
Based on what you have learned, what kinds of living and nonliving things do you think a marine biologist studies? What are some questions that biologists might ask about the living things they study?
Answers
Answer:
A marine biologist study organisms from minute phytoplanktons to huge and gigantic blue whale. A marine ecosystem contains thousands of species of organisms that are study topic of a marine biologist.
Marine biologists study the interaction of these species with their environment. The non-living things that scientific study is about the effect of change in temperature, pH, oxygen quantity, light, acidity, salinity on marine species.
Some questions that biologist ask about living things they study are :
- how many marine species are in the endangered list?
- what is the role of a species in its ecosystem?
-how the extinction of a species affects the food chain in the ecosystem?
what are main treatments for cancer
Answers
Answer:
- Surgery
- Chemotherapy
- Radiation Therapy
- Immunotherapy
- Targeted Therapy
- Hormone Therapy
However some people may have no treatments, depending on the cancer.
Explanation:
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A student sees several ants walking up a wall following the exact same trail that an ant took earlier. She wants to apply the scientific method to determine how the ants detected the trail. Which of these steps would come first in her application of the scientific method?
Perform an experiment by cleaning the scent away from part of the trail.
Draw a conclusion that the ants follow a scent trail.
Make a prediction about what the ants will do after she cleans away part of the trail.
Hypothesize that the ants are following a scent trail that the first ant left.
Answers
Answer:i think its answer C
Explanation:
Answer:
Hypothesize that the ants are following a scent trail that the first ant left.
Explanation:
The scientific method can be defined as the manner or set of ground rules employed in a scientific investigation in order to obtain the most reliable results as possible. However, the scientific method is somewhat more subjective, or implicit, in the scientific way of thinking than a manual with explicit rules about how the scientist or another should act.
Generally, the scientific method includes some steps such as observation, hypothesis formulation, experimentation, interpretation of results and, finally, conclusion. The student, exposed in the question, already made the observation, when he realized that ants do exactly the same track as an ant did before; The next step in the scientific method this student must do is to create a hypothesis. This student's hypothesis should ask whether ants are following a scent trail the first ant left.
Which equation best represent the process of photosynthesis
Answers
Answer:
6 CO2 + 6 H2O → C6H12O6 + 6 O2
Explanation:
Answer:
The answer is: 6 CO2 + 6 H2O → C6H12O6 + 6 O2
Explanation:
Photosynthesis is the process in which the energy of light is converted into chemical energy in the form of sugars. In a process driven by the energy of light, glucose molecules (and other sugars) are created from water and carbon dioxide, while oxygen is released as a byproduct.
Light
6 CO2 + 6 H2O -------------- → C6H12O6 + 6 O2
Nutrients (Sugars)
The answer is: 6 CO2 + 6 H2O → C6H12O6 + 6 O2
The process by which Prokaryotic cells divide is known as:
Answers
Answer:
binary fission
Explanation:
The process by which Prokaryotic cells divide is known as binary fission.
prokaryotic cells are cells that do not have a nucleus and replicate through the process of binary fission
The skeletal system performs a variety of functions that are crucial to maintaining life processes. What function is performed in
the bone marrow, but not in the ossified bones of the skeleton?
a oxygen transportation
C mineral storage
b. muscle attachment
d red blood cell production
Answers
Answer:
Red blood cell production
Explanation:
Marrow makes blood and it is then sent to heart and lungs to be filled with oxygen
Why are bacteria good for copying large amounts of DNA?
O
A. They do not contain their own DNA.
O
B. They cannot accept DNA from other organisms.
O
C. They can reproduce very quickly.
O
D. They have a very thick cellular membrane.
Answers
Bacteria are good for copying large amounts of DNA, as they can reproduce very quickly.Therefore, the correct option is C.
What are bacteria?Bacteria are single-celled microorganisms that belong to the domain Bacteria. They are among the most abundant and diverse forms of life on Earth.They have the ability to rapidly copy DNA due to their fast replication rates. They can divide and produce offspring every 20–30 minutes under optimal conditions, allowing them to copy large amounts of DNA in a short period of time.
This makes them useful in a variety of molecular biology techniques, such as the amplification of DNA through polymerase chain reaction (PCR) or the production of large quantities of recombinant DNA using bacterial cloning vectors.Therefore, the correct option is C.
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The image below shows a common blood pressure gauge.
What does this device do?
A.
measures the level of oxygen present in the blood
B.
measures the pressure of blood when the lungs expand and compress
C.
measures the electrical activity of the heart
D.
measures the pressure of blood when the heart contracts and relaxes
Answers
Answer:
measures the pressure of blood when the heart contracts and relaxes..Blood pressure Gauge, commonly known as a “sphygmomanometer,” which is a device used to measure blood pressure. Thus, option D is correct.
What is the sphygmomanometer?Every sphygmomanometer works under the assumption that when a hollow rubber air bladder-filled cuff is placed around a limb and inflated.
The pressure inside the bladder equals the pressure on the artery beneath the cuff.
An inflatable cuff that restricts blood flow and a mercury or mechanical manometer that measures pressure together make up a blood pressure.
When the heart beats, the heart muscle contracts (squeezes), propelling oxygen-rich blood into the blood arteries. This pressure is known as the systolic blood pressure.
Therefore, sphygmomanometer measures the pressure of blood when the heart contracts and relaxes.
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what is the role of
a pioneer species in primary succession
Answers
Internal gestation followed by live birth is an evolutionary development most likely driven by which of the following?
A. The need to give birth and reproduce on dry land where eggs could dry out
B. Environmental conditions caused eggs to over-absorb dangerous molecules from the environment
C. The inability of eggs to acquire nutrients to grow complex animals
D. The threat of predators to eat eggs
Answers
Internal gestation and live birth in animals are evolutionary developments likely driven by the need to reproduce in dry terrestrial environments where eggs could dry out and by the threat of predators who pose significant risks to eggs. These strategies could ensure survival of offspring by preserving a moist environment and offering protection against predators.
Explanation:Internal gestation followed by live birth is an evolutionary development that likely occurred for several reasons. The most compelling of these can be seen in options A and D from your question, i.e., the need to reproduce on dry land where eggs could potentially dry out and the defense against predators who pose a threat to laid eggs.
Option A addresses the environmental constraints encountered by land-dwelling species. Eggs, when left exposed, could rapidly lose moisture and become inviable in dry terrestrial environments. Accordingly, a strategy of internal gestation could help in preserving a moist environment for the developing embryo, leading to the evolution of live birth.
Option D pertains to predation pressure. Eggs, whether in water or on land, are highly vulnerable to predators. Thus, keeping the young ones inside the body until they are sufficiently developed could be a defensive strategy against predation.
Although factors mentioned in options B and C (absorption of harmful molecules and inefficient nutrient acquisition) might have played a role too, A and D seem to be the stronger drives evolutionary-wise.
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The evolutionary development of internal gestation and live birth is most likely driven by a combination of factors, including the threat of predation, the need to reproduce in harsh environments, and to shield developing embryos from harmful substances.
Explanation:The evolution of internal gestation followed by live birth is most commonly understood within the context of predation and harsh environmental conditions. Both A and D options suggest plausible causes. The evolution of internal gestation can be seen, in part, as a strategy to give the embryo a safer environment that is shielded from predators and environment risks (drying out, for instance). Furthermore, in adverse conditions, eggs could absorb harmful substances from surroundings. The mutually exclusive nature of these answers suggests that the particular evolutionary route may have been influenced by a combination of factors.
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During which succession do new species move into an area and colonize it?
During____
succession, new species move into an area and colonize it.
Answers
Primary succession is when species enter and colonize an area that hadn’t been colonized before.(unlike secondary succession)
During primary succession, new species move into an area and colonize it which is bare before its entry.
What is Succession?Succession may be defined as the process of gradual and continuous replacement of one community by another community over a long period of time.
Primary succession is always initiated in the bare area where no life has existed before.
Therefore, it is well described above.
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A key feature of animal body plans is that they can show multiple types of symmetry. For example, a dog would represent bilateral symmetry, while a jellyfish and other cnidarians would represent
A. spherical symmetry.
B. circular symmetry.
C. planar symmetry.
D. radial symmetry.
Answers
Explanation:
the correct answer is d radial symmetry
Answer:
radial symmetry
Explanation:
PENN
Which of the following is a cause of a DNA mutation?
O
A. The linking of amino acid subunits into a long chain
O
B. The transcription of DNA into RNA
O
C. An error in the repair of damaged DNA
D. The diffusion of molecules across the cell membrane
SUBMIT
Answers
a wrong nucleotide can be placed while repairing DNA which is considered a mutation.
Answer:
(C). An error in the repair of damaged DNA.
Explanation:
DNA mutation can be defined as permanent changes in genetic material due to alteration in nucleotide sequence. Mutations can occur randomly during replication or can be induced by exposure to mutagens (mutation causing agents).
During DNA replication, various errors take place due to incorporation of incorrect nucleotide base in growing DNA strand and form damaged DNA. These errors are generally repaired by DNA-repair systems of cell.
However, if the damaged DNA is not repaired due to errors in DNA-repair system due to problems, the DNA would become mutated.
Thus, the correct answer is option (C).
An example of genetic drift
Answers
Answer:
A random succession of births results in all other hair colors going extinct within a village full of redheaded people.
Explanation:
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where do plants store the energy formed by photosynthesis?
a. in the chloroplast membrane
b. in the thylakoids membrane
c. in chemical bonds
d. in protons
Answers
Answer:
A
Explanation:
Im not 10p%sure but the chloroplast should be correct
18. Over time, how do sand dunes tend to migrate?
a. perpendicular to the movement of the wind
b. in the same direction as the wind blows
c. toward the wind
d. in random directions
Answers
Answer:
in the same direction as the wind blows
Explanation:
The dunes are hills formed by grains of sand held together by the action of wind or water. Over time, as sand dunes tend to migrate in the same direction as the wind blows.
They have a larger side that is eroded (windward) and a smaller, steeper side (leeward) where deposition of eroded material occurs. Through this mechanism of erosion and deposition the dunes are considered highly dynamic, "moving" over time.
How are the reproductive cycles of a fungus and a pteridophyte similar?
A)Both organisms form fruiting bodies that produce diploid seeds.
B)Both organisms produce haploid spores and exhibit diploid and haploid stages.
C)Both organisms reproduce sexually when two haploid hyphae fuse.
D)Both organisms exhibit a diploid stage and are only able to reproduce asexually.
Answers
Answer:
i think it is D
Explanation: they both reproduce asexually
Answer:
The correct answer is option B.
Explanation:
The sporophytes in pteridophytes is the haploid stage and generate spores. The diploid stage in pteridophytes may take place when two spores combine and give rise to a prothallus, that is, the diploid stage of the pteridophytes.
A fungus to generate spores by the sporangiophores, its haploid stage. However, on certain occasions, two horizontal hyphae between the two species of fungi, may combine at the tips and generate a zygote via plasmogamy and karyogamy.
Which of the following describes the role of cyclic AMP (cAMP) in hormone response?
A. cAMP are molecules that bind and captures the nonsteroid hormone.
B. cAMP receives messages from mRNA to begin protein synthesis.
C. cAMP receives a message from a nonsteroid hormone and carries the message into the cell.
D. cAMP opens a pore for steroid hormones to enter the nucleus
Answers
Answer:
B
Explanation:
Answer:
C. cAMP receives a message from a nonsteroid hormone and carries the message into the cell.
Explanation:
Water soluble hormones, the non-steroid hormones bind to their cell surface receptors to activate the G protein. The activated G protein activates adenylyl cyclase which in turn leads to the formation of cAMP from ATP. The cAMP activates protein kinases which in turn phosphorylates the cytoplasmic proteins. The activates cytoplasmic proteins bring about the desired response.
In this way, the cAMP second messenger system delivers the information from hormones to the cell via cAMP.