Answer:
Of the three kinds of substances that make up matter in nature which one forms most minerals? Most minerals are chemical compounds.
Explanation:
Final answer:
Silicates, composed of silicon and oxygen, are the most abundant class of minerals in the Earth's crust, forming around 90% of it and contributing to the diversity of rocks.
Explanation:
Of the three kinds of substances that make up matter in nature, silicates form most of the minerals found in the Earth's crust. Silicates, a large and complex class of minerals, are composed of silicon and oxygen, with the most common type being the silicate mineral with a base structure of (SiO₄)⁴⁻. Silicate minerals, such as quartz and feldspar, constitute approximately 90% of the Earth's crust due to the abundance of silicon and oxygen. These minerals are not only significant in quantity but essential for creating a diverse range of rocks and subsequently the landscape of our planet.
33. Which stimulus tests the absolute threshold of vision?
A) Hair cells of the inner ear
B) Electromagnetic energy
C) Chemical substances in the air
D) A ticking watch in a quiet room
REALLY NEED THIS RIGHT
Answer:
hair cells of the inner ear
why are covelants bonds strong?
Answer:
Covalent is stronger because the 2 atoms involve share 2 or more outer shell electrons. Covalent bonds hold all of your biomolecules together. Ionic bonds are formed when a valence outer shell electron is transferred from one atom to another - a much weaker interaction.
Explanation:
Hope this helps
Answer:
An atom that shares one or more of its electrons will complete its outer shell. Covalent bonds are strong - a lot of energy is needed to break them. ... Both nuclei are strongly attracted to the shared pair of electrons in the covalent bond, so covalent bonds are very strong and require a lot of energy to break.
Select the elements that are considered to have a high level of attraction for surrounding electrons:
Select all that apply.
• oxygen
• nitrogen
• carbon
• hydrogen
Answer:
Oxygen and nitrogen
Explanation:
Oxygen and nitrogen are very electronegative than any other element in the periodic table hence they have more tendency to attract an electron towards itself
1.) the field names in the data base are also known as __________.
A.) category or column headings
B.) the name of a row
C.) individual cells in a database
D.) records
2.) To sort items in alphabetical order, what should you select from the field name drop-down menu?
A.) Sort greatest to least
B.) Sort least to greatest
C.) Sort A-Z
D.) Sort Z-A
( 100 POINTS ON THE LINE )
1 is A.) category or column headings
2 is C.) Sort A-Z
Which of these outcomes is the main goal of ecosystem-
based management?
O A. To manage using trial and error
B. To account for all the complexities in a stable
population
O C. To determine how many populations can be taken
from an ecosystem
D. To determine what is best for the ecosystem as a
whole
To determine what is best for the ecosystem as a whole is the outcomes of the main goal of ecosystem- based management.
What is the goal of ecosystem-based management?The main goal of ecosystem-based management is to maintain health, production and condition of an ecosystem so that it can provide the services to humans.
So we can conclude that to determine what is best for the ecosystem as a whole is the outcomes of the main goal of ecosystem- based management.
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Explain the distinct differences between a bacterium and an animal cell.
How are viruses able to infect cells?
Answer: Viruses infect cells by entering the cell almost disguising itself as a positive cell or object if you will. Once the virus is inside and the cell absorbs it thinking it is food or something else god knows what, the virus then replicates its DNA into the cell, replacing the RNA and infecting the cell, which then begins to multiply. Good Luck!
Explanation:
Final answer:
Viruses attach to specific receptors on host cells, inject their genetic material, replicate using the host's cellular machinery, and then release new viral particles, often destroying the host cell in the process.
Explanation:
Viruses are obligate, intracellular parasites that require a living host cell to replicate. They initiate infection by recognizing and attaching to cell-surface receptors on a permissive host cell, a process dictated by a molecular match between the virus and the viral receptor. After attachment, the virus enters the host cell, uncoats, and releases its genetic material, hijacking the cell's machinery to copy its genome and produce viral proteins. The new virus particles are then assembled and released, often killing the host cell through lysis or apoptosis. This infection process can cause cell damage and elicit an immune response from the host organism.
Host cell specificity is a hallmark of viral infections. For example, the influenza virus infects cells of the respiratory system due to the presence of specific receptors that the virus can bind to. Viral infection and replication depend on the cell's ability to produce necessary substances for the virus, and immune responses also play a role in determining which cells a virus may target.
state a problem. describe what you want to find out about the relationship of the following factors to the amount of water erosion that occurs on a slope
To determine the relationship of factors to the amount of water erosion on a slope, we need to consider several variables. Soil erosion by water on a hill slope is influenced by multiple factors such as the slope angle, soil composition, and vegetative cover. The RUSLE equation, which stands for Revised Universal Soil Loss Equation, is a tool that allows us to estimate this erosion. It incorporates factors like rainfall erosivity (R), soil erodibility (K), topographic factors (LS), cover management (C), and support practice factors (P) to calculate annual soil loss. Considering slope, a steeper angle tends to increase erosion, as water flows more quickly, carrying soil particles with it. The problem we aim to solve is how to minimize water erosion on slopes, especially comparing these rates with 'tolerable' erosion rates, or T values, which represent the maximum level of soil loss that would allow for long-term soil productivity. We also explore conservation practices that can reduce erosion, such as crop rotation, terracing, and the establishment of buffer strips. In understanding erosion, federal, state, and local agencies play roles in soil and water conservation, applying these concepts in practical ways to protect the land. Knowing the factors contributing to erosion and applying principles from the RUSLE, we can plan effective conservation practices.
Describe Watson and Crick’s model of the DNA molecule
Explanation:
Watson and Crick's model is composed of two anti parallel strands that are connected by hydrogen bonds between nitrogenous bases. Hydrogen bonds form between adenine and thymine and between cytosine and guanine. The multiple strands of DNA double helix are joined combinedly by hydrogen bonds between nitrogenous bases on opposite strands. Every pairs of the bases present the flat, which further makes a "rung" on the ladder of the DNA molecule.
explain virology in biology
Answer:
Virology is the study of viruses and virus-like agents, including (but not limited to) their taxonomy, disease-producing properties, cultivation and genetics. It is often considered a part of microbiology or pathology.
Explanation:
Answer: virology is the study of viruses
Explanation:
Virology is the study of viral : which are submicroscopic, parasitic particles of genetic material contained in a protein coat– and virus-like agents.
Part E
Based on your observations in parts A through D, explain why Earth's gravity pulls vou toward the ground
Answer:
The gravitational pull between two objects increases as the distance between them decreases. The gravitational pull also increases with an increase in the mass of the objects. Earth has a large mass. So, when our bodies are close to Earth, the gravitational pull between us and the Earth is strong. This force pulls us down, so we stand firmly on the ground without floating in the air. Without the gravitational force, we would drift away from Earth.
On Plato.
Explanation:
Final answer:
The Earth's gravity pulls everything towards its center, with the force exerted by every part of the Earth contributing to the gravitational pull. This phenomenon is due to the symmetry of gravitational forces between Earth and objects on its surface. Gravity's significant impact on us is a result of its dominant force among the fundamental forces.
Explanation:
Earth's gravitational force pulls everything down towards the center of the Earth, causing objects to fall when dropped. When you stand on the ground, the force of gravity is exerted by every part of Earth, with the entirety of the Earth's mass contributing to the gravitational pull.
Observations show that objects like you, your desk, or a falling apple exert an equal but opposite pull on the Earth. This phenomenon highlights the symmetry of gravitational forces between Earth and objects on its surface.
Gravity affects us noticeably due to its prominent force among the four fundamental forces. The near perfect symmetry of Earth causes the total force to almost cancel out sideways components, making gravity appear to pull straight down.
Which description best fits the activity of a cell during interphase?
Question 11 options:
The cell carries on metabolism.
The cell differentiates to have a new function.
The cell splits in two.
The cell splits in two but with half the normal number of chromosomes.
Answer:
The correct option is A) The cell carries on metabolism.
Explanation:
Interphase can be described as the phase of cell cycle in which the cell spends most of its time. In this phase, the cell carries out its normal metabolic functions and prepares it self for division. The phase of interphase is divided into three parts which are the Gap 1, Synthesis, and Gap 2. Hence, the correct option is A.
Other options, like option C, is not correct because the cell splits into two during cytokinesis.
Final answer:
The best description of a cell's activity during interphase is that a) it carries on normal metabolism, grows, and duplicates its DNA in preparation for mitosis and cytokinesis.
Explanation:
The description that best fits the activity of a cell during interphase is: a) The cell carries on metabolism. During interphase, a cell grows, carries out all normal metabolic functions, and replicates its DNA. This phase is divided into three stages: G1 phase (growth), S phase (DNA synthesis), and G2 phase (preparation for mitosis). Interphase is the period of the cell cycle when the cell is not dividing and is preparing for the cell division that occurs during mitosis and cytokinesis.
The number of covalent bonds that an atom tends to form is equal to:
A: the number of valence electrons.
B: the number of unbalanced neutrons.
C: the number of unpaired electrons.
D: the atomic number.
E: the number of nearby atoms.
Answer: C): the number of unpaired electrons.
Explanation: A covalent bond is a type of chemical bond formed by sharing equal number of electrons between two non-metal atoms so that both can attain the a stable octet or duplet structure of noble gases. The electrons shared by two non-metal atoms are the unpaired electrons. For example, in the formation of a chlorine molecule, a chlorine atom has seven valence electrons and electrons usually occur in pairs. Having seven valence electrons means that a chlorine atom has three pairs of electron and one unpaired electron in its outermost shell. The two chlorine atoms will combine together each donating its unpaired electron to be shared, thus leading the two atoms to attain stable octet structure of Argon.
2. State the law of conservation of mass and the law of
conservation of energy.
The law of conservation of mass states that mass cannot be created or destroyed in any chemical reaction or physical change. The law of conservation of energy states that energy cannot be created or destroyed; it can only be transferred or converted from one form to another.
Explanation:Law of Conservation of Mass:The law of conservation of mass states that mass cannot be created or destroyed in any chemical reaction or physical change. This means that the total mass of the reactants in a chemical reaction must equal the total mass of the products.
Law of Conservation of Energy:The law of conservation of energy states that energy cannot be created or destroyed; it can only be transferred or converted from one form to another. This means that the total energy before a process is equal to the total energy after the process.
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What computer generated document helps organize and display data?
A spreadsheet is a computer application for organization, analysis and storage of data in tabular form.
a spreadsheet is a computer application for organization, analysis and storage of data in tabs.
When atoms combine to form compounds, they gain,lose,or share
Answer:
it depends upon the atomic number
Explanation:
if the atomic number is below 4 it will lose electrons
if the atomic number is above 4 it will gain electrons
if the atomic number is 4 it will share its electrons with other atom of the same element make covalent bonds
ex; carbon
Answer: electron
Explanation:When atoms combine to form compounds, they gain,lose,or share *electron.*
So I failed my science test and got a 43% on it. What do you think I can do next time to pass the tesr
Answer:
Find a study buddy or groupTry a practice testStay after school to get extra helpMake a study guideEtc...Explanation:
A town develops green space on top of an apartment building. This provides a relaxing place for the renters while also allowing the owners to charge higher rents. Which
benefits of green space does this situation provide?
1.environmental health, and economic
2.health and economic
3.economic and environmental
4.environmental and health
The correct option is option 1.
What is green space and why is it important?
Green spaces in cities mitigate the effects of pollution and can reduce a phenomenon known as the urban heat island effect, which refers to heat trapped in built-up areas. The urban heat island effect appears in towns and cities as a result of human activity.
What are the benefits of green space in urban areas?
Green spaces have a number of positive impacts on the urban environment which help human health, including reducing noise, providing shade and cooling, and reducing both the likelihood of flooding and air pollution.
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What kind of waves do cellular telephones use to transmit and receive signals
A
gamma rays
B.
infrared rays
c
microwaves
D
ultraviolet rays
The kind of waves that cellular telephones use to transmit and receive network signals is: C. microwaves.
A wave can be defined as a disturbance in a medium that progressively transports energy from its source to another location, without the transportation of matter.
In Physics, the are different kinds of wave in the electromagnetic spectrum and these include the following;
Gamma rays.Visible light.Ultraviolet radiation.X-rays.Radio waves.Infrared radiation.Microwaves.The wavelength of microwave is between the range of 1 millimeter (mm) to 1 meter (m) while its frequency is ranging from 300 megahertz (MHz) to 300 gigahertz (GHz).
Hence, microwaves are used in cellular telephones to transmit and receive network signals because of their small wavelength and high frequency.
Also, microwaves are used in cellular telephones because they are able to carry thousands of channels at once.
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What is Methanobacterium ruminantium Domain and Kingdom?
Answer:
Methanogens are members of the domain Archaea, and fall within the kingdom Euryarchaeota
Explanation:
What is meant by the term carbon footprint?
O
A. The total CO2 released by a person
O
B. The total CO2 released by a person's garden
O
C. The total co, used up by each person
O
D. The total Co, in plants consumed by a person
A
The total CO2 released by a person is known as carbon footprint.
Explanation:
It is used to categorize the amount of carbon dioxide (and other greenhouse gases) that every human - due to human activities such as driving - are emitting into the atmosphere. It is equivalent to per capita carbon emission. The carbon footprint per person in the US, for example, is 16 tonnes which is also interpreted as the average production of carbon dioxide per person.
Countries are putting measures to curb increasing carbon footprints by enacting policies like a carbon tax and incentives towards renewable energy sources. This is in an effort to reduce global warming.
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Answer:
The total CO2 released by a person
Explanation:
Question 3 (3 points)
Photosynthesis involves the transformation of light energy into what molecule?
DNA
glucose
ATP
water
Answer: ATP
Explanation: During photosynthesis particularly in the light dependent reaction or light reaction ATP ( Adenosine triphosphate) is produced.
The more ________________ the homologous structure, the more likely they _______________ shared a common ancestor
The more numbers of the homologous structure, the more likely they have recently shared a common ancestor.
Explanation:
Homologous organs are defined as those organs which do have different functions but a similar basic structure which denotes the divergent evolution. Homologous organs are seen in species that are very close to each other which are more related with each other in terms of evolution. For example, a bird is more close to each man than a fish, so do share more homologous organs common to man than fishes do. Examples of the homologous organs are hands of human and wings of birds. They have same basic structure like skeletal structure which is humerus, radius, ulna, carpals, metacarpals and phalanges. They are similar in structure but have different functions like flying in birds and gathering food in humans.
how does human population increase affect aquatic resources
Answer:
as the human population grows, more people will on be on earth and if those people pollute in the ocean the ocean will get dirtier and unhealthy for the underwater creatures.
The thermal energy of matter depends on how fast its particles are moving on average, which is measured by temperature and on how many particles there are which is measured by _________________?
a) matter
b) temp
c) mass
d) none of the above
Answer:
The correct option is C) mass
Explanation:
Thermal energy can be described as the total kinetic energy which an moving object possesses. As the temperature of an object will be raised, its particles will move with faster energy and hence the thermal energy will increase. The thermal energy of an object also depends on the number of atoms which the particular object possesses. The number of atoms present in an object is referred to as the mass of the object.
difference between veins and artery
Answer: arteries carry oxygenated blood away from the heart to the body. Veins carry oxygen-poor blood back from the body to the heart.
Final answer:
Arteries carry blood away from the heart with thick walls for high pressure, while veins carry blood toward the heart with thinner walls and often have valves to prevent backflow.
Explanation:
Differences Between Veins and Arteries:
The main difference between veins and arteries is the direction in which they carry blood relative to the heart. Arteries carry blood away from the heart, and they have thicker walls and smaller lumens to withstand the high pressure of the blood being pumped by the heart. In contrast, veins carry blood toward the heart, have thinner walls, and larger and irregular lumens, which is suited to their low-pressure blood flow. While both vessels have three distinct layers, veins often have valves to prevent backflow as the blood travels back to the heart.
Under a microscope, the differences in structure are also evident. The lumen and tunica intima of a vein appear smooth, while arteries appear wavy due to the contraction of smooth muscle in their walls. Capillaries, while not as frequently discussed, serve to connect arteries and veins and facilitate the exchange of oxygen, carbon dioxide, and other substances between blood and tissues.
Does tRNA transfer amino acids during transcription or translation?
Answer:
translation
Explanation:
transcription is when the DNA becomes RNA. Hope that helps.
tRNA (Transfer RNA) transfers amino acids during the process of translation, adding specific amino acids to the growing protein chain. This amino acid transfer does not take place during transcription, which is a separate process for creating an RNA copy of a gene sequence.
Explanation:The role of tRNA (transfer RNA) is very critical in protein synthesis, specifically during the process of translation, not transcription. Transcription is the process of creating an RNA copy of a gene sequence. On the other hand, translation is the process of translating the sequence of a messenger RNA (mRNA) molecule to a sequence of amino acids during protein synthesis. It is during translation where tRNAs play a vital role. Each tRNA molecule carries a specific amino acid, where it pairs with complementary base pairs in the mRNA molecule and adds its amino acid to the growing protein chain. Therefore, tRNA transfers amino acids during translation.
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In a certain population of rabbits, the allele for brown fur is dominant over the
allele for white fur. If 10 out of 100 rabbits have white fur, what is the allele
frequency for the dominant allele?
The Hardy-Weinberg equation is:
[homozygous dominant]2 + 2[heterozygous] + [homozygous recessive]2 = 1
O A. 0.95
O B. 0.90
O C. 0.68
O D. 0.10
The allele frequency for the dominant allele is 0.68.
C. 0.68
Explanation:
Let,
The Brown dominant allele be BB
The white recessive allele be bb
Frequency of white fur rabbit (bb) = 10/100 = 0.1
Therefore, q2 = 0.1
Frequency of recessive allele, q= √0.1
q = 0.316
Using Hardy Weinberg equation:
p+q = 1
p = 1-q
p = 1-0.316
p = 0.684
Thus, frequency of dominant allele, p = 0.684
a population of antelope has a negative population
A population of antelope has a negative or declining population when the situation possesses birth plus immigration rate is lower than that of death plus emigration rates.
What is Population?A population may be defined as the number of individuals of the same species living in a particular area at a given time.
The complete question is: A population of antelope has a negative population growth rate. Which of these conditions must also be true for the population growth rate to be negative? The options are :
Births + Immigrations > deaths + emigrations.Births + emigrations < deaths + immigrations.Births + Immigrations < deaths + emigrations. Births + emigrations > deaths + immigrations.Thus, the correct option for this question is C, i.e. Births + Immigrations < deaths + emigrations.
It is well estimated with the given equation below:
Negative or declining population = B + I < D + E.
where B = birth rate
I = immigration
D = death rate
E = Emigration
Therefore, it is well described above.
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Radiant energy is necessary for the production of which of the following? (A) oil (B) wind (C) moving water (D) all of these
B
Radiant energy is necessary for the production of Wind
Explanation:
Radiant energy is energy from electromagnetic waves. Solar energy from the sun is a form of radiant energy. The sun is responsible for powering winds in the earth's atmosphere.
Due to differential heating of the earth at different latitudes due to the spherical nature of the planet- and also due to other local factors like the terrain of a region and cloud cover - there are high and low-pressure systems formed at different regions. Air masses in the high-pressure system is of higher density while that in low pressure system is less dense. Winds are usually caused by the air rushing in from high-pressure zones to low-pressure zone to replace the rising less dense air.
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