Answer:
Human disturbances such as clear-cutting can also cause secondary succession. Some disturbances affect only a small area, like the local damage caused by a single tree falling in the forest, while others affect entire landscapes. These disturbances damage the ecosystem but leave soil and nutrients behind.
Explanation:
Trust me.
Compared to primary ecological succession, secondary ecological succession experiences less resource conflicts. In this succession process, the pioneer species also enjoy greater privileges.
What is secondary succession?Secondary succession starts with a lot of resource availability, primary succession starts with a crisis in resource availability. Major sources of plant energy include decomposing organic matter, inorganic salts, ions, humus, and other soil leftovers.
Pioneer species carry out the establishment or re-establishment process of the sterile or devastated ecosystems at the start of both primary and secondary successions.
Only plants and blue-green algae/cyanobacteria are the main succession's pioneer species; they are all "photo-auto-lithotrophs," or succession producers. Secondary succession pioneer species don't always have to be photo auto-lithotrophic.
Therefore, Compared to primary ecological succession, secondary ecological succession experiences less resource conflicts. In this succession process, the pioneer species also enjoy greater privileges.
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Cells can conduct many tasks, including which of the following?
duplicate themselves
convert energy
selectively exchange materials
all of the above
Answer:
all of the above
Explanation:
cells are multiple taskers
Which of the following summarizes the law of conservation of mass when dealing with a chemical change?
A. The total mass of the reactants is greater than the total mass of the products
B. The total mass of reactants is less than the total amount of the products.
C. The total mass of the reactants equals the total mass of the products.
D. Matter can’t change form.
Final answer:
The law of conservation of mass states that the mass of reactants equals the mass of products during a chemical reaction, meaning matter is conserved and not created or destroyed. Thus, option C is correct.
Explanation:
The correct answer to the question is: C. The total mass of the reactants equals the total mass of the products. This statement summarizes the law of conservation of mass, which holds that during any chemical reaction, matter is neither created nor destroyed, meaning that the mass of the substances before the reaction (the reactants) must be the same as the mass of the substances after the reaction (the products).
For example, when hydrogen gas reacts with oxygen to form water, the mass of hydrogen and oxygen before the reaction is equal to the mass of the water produced after the reaction. This demonstrates that the total mass is conserved throughout the process.
In summary, this fundamental principle ensures that during a chemical change, the total mass remains constant, illustrating that in closed systems, mass can change form but is conserved.
Which organism is most likely 10 centimeters in size?
A. tree
B. ant
C. bacteria
D. lizard
Question 1
Which of the following can best explain why eukaryotic cells must use mechanisms other than diffusion to
transport materials around the cell?
In eukaryotic cells, materials can flow through microtubules
Enzymes cannot attach to eukaryotic membran
Random movement of molecules is not fast enough to disperse through the larger eukaryotic cell volume,
In eukaryotic cells, internal membranes get in the way and block diffusion
Answer:
Random movement of molecules is not fast enough to disperse through the larger eukaryotic cell volume,
Explanation:
Eukaryotic clels are much bigger than prokaryotic cells. The latter may be 0.5 um while the former may be 100 um (which is more than 10X in comparative size). Prokaryotic cells, therefore, have a larger surface area to volume ration that suits them to use diffusion to eliminate waste and take up nutrients. However eukaryotic cells cannot adopt this mechanism due to their smaller surface area-to-volume ratio which would cause them to accumulate waste to toxicity levels. Eukaryotic cells, therefore, use additional vesicle transport to take up nutrient and eliminate waste in bulk.
Which of the following is a measure of the acidity of a compound
HELP !!
What are the three groups of atoms that make up amino acids called?
O
A. Phosphate, sugar ring, nucleotide base
O
B. Carbon, hydrogen, oxygen
O
O
C. Hemoglobin, oxygen, iron
D. Carboxyl group, amino group, side chain
Answer:
Carboxyl Group, Amino Group and Side chain
Explanation:
An amino acid consists of three parts which are- carboxyl group, amino group and a side chain.
What is amino acid and what is its structure?• Amino acids are the building blocks of proteins and proteins in turn are macromolecules that are important for living beings as they help in maintaining structure, function and regulation of body.
• The structure of amino acid consists of a central chiral carbon (-C*), a hydrogen atom (-H), amino group (-[tex]NH_{3}[/tex]), carboxyl group (-COOH) and a side chain (-R)
• The side chain (-R) is what makes up different kind of amino acids. There are 20 types of amino acids.
Therefore, option (d) Carboxyl group, amino group, side chain is correct.
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The two most populous countries in the world are
Answer: China and India
Explanation: China's population is 1,389,618,778 and India's is 1,311,559,204.
2. Factors that may affect variables are called
a. experiments.
b. hypotheses.
C. theories.
d. variables.
Experiments test hypotheses without explaining underlying causes. Hypotheses propose explanations, while theories, supported by evidence, provide comprehensive explanations, elucidating how factors interact. For instance, testing fertilizer effects on plant growth may support a hypothesis but a theory would explain why. Here option C is correct.
Experiments are controlled procedures conducted to test a hypothesis. They don't explain why variables might be affected, just if they are affected.
Hypotheses are proposed explanations for a phenomenon, but they don't explain the underlying factors that might be causing it.
Theories are well-established explanations for a phenomenon that are supported by evidence. They often explain how different factors can interact to influence variables.
For example, imagine you're studying the effect of fertilizer on plant growth. You might conduct an experiment to see if plants fertilized with different amounts of fertilizer grow taller. The results of the experiment might support a hypothesis that fertilizer increases plant growth, but it wouldn't explain why.
A theory of plant growth, on the other hand, might explain that fertilizer provides nutrients that plants need to grow taller. This theory could then be used to explain why the plants in your experiment grew taller when they were fertilized. Here option C is correct.
In an experiment, factors that might influence the dependent variable beyond the independent variable being tested are called control variables, and they are crucial for ensuring accurate experimental results.
Explanation:Factors that may affect variables in an experiment are called control variables. In scientific experiments, the variable that is being measured is known as the dependent variable, which is the outcome variable affected by the manipulation of another variable. The variable that the experimenter changes to observe its effects on the dependent variable is called the independent variable. When designing an experiment, it is crucial to also consider and control any additional factors or variables that could influence the dependent variable, beyond the independent variable being tested. These are often referred to as control variables, and they help ensure that the experiment measures the effect of the independent variable as accurately as possible without interference from other factors.
what would occur to an autotroph population if the number of herbivores dramatically increased
Answer:
The population of autotroph's would decrease.
Explanation:
Herbivores feed on plants and that is what an autotroph is, but if the amount of herbivores increased, there would be more animals to eat more of the plants.
Need help with cactus BIG POINTS
Okay so my moon cactus was rotting so i did what google said and cut the head off.
i really love my moon cactus so please tell me what i should do next, tips recommendations or what i did wrong needs to be very precise and correct because i want my cactus to turn into another cactus please help
After cutting the rotting head off the moon cactus, let the cut dry and callous over before planting in fresh, well-draining soil. Water sparingly and provide bright, indirect light. With proper care, the cactus may grow new heads or pups from the original base.
If your moon cactus was rotting and you've already cut the head off, the next steps are crucial for its recovery or propagation. First, make sure that the cut area is clean and dry to prevent further rot. Allow the cutting to callous over for a few days before attempting to re-root it.
Once the cut has healed, you can place the cactus in a new pot with fresh, well-draining soil. Ensure the pot has good drainage holes. Water sparingly, only when the soil is completely dry, to prevent overwatering, which is a common cause of rot.
Keep the cactus in a warm, brightly lit area but out of direct sunlight until it establishes new roots. This process can take several weeks. If the original base of the rotting cactus is healthy, you can also let it callous and it may grow new heads or pups.
Tips for Successful Moon Cactus Growth:
Use a well-draining cactus mix to prevent water retention that can cause rot.Water sparingly to keep the soil moist but not wet.Provide bright, indirect light for your cactus.How does a law different from a theory
Answer:
a theory may be outdated or replaced. Law can't be replaced or outdated.
Explanation:
A hypothesis is a limited explanation of a phenomenon; a scientific theory is an in-depth explanation of the observed phenomenon. A law is a statement about an observed phenomenon or a unifying concept,
some bugs can walk on the surface of water because the atteraction between water molecules is strong enough to hold us the bug. What do we call the attraction?
Answer:
Surface Tension
Explanation:
It is the combination of the legs not being wetted and the surface tension. The legs of water striders are hydrophobic. Water molecules are strongly attracted to one another. This is due to "hydrogen bonding": a proton in water is shared between two oxygen atoms of two water molecules.
The attraction that allows bugs to walk on water is called surface tension, a result of cohesive forces among water molecules like hydrogen bonding.
Explanation:The attraction that allows certain bugs to walk on water is called surface tension. Surface tension is a phenomenon in physics, where the surface of liquids, in this case water, behave as if they are covered with a stretched elastic sheet. This is due to the cohesive forces, specifically hydrogen bonding, among the water molecules.
For bugs that walk on water, their weight is sufficiently low so that the surface of water is not broken. These bugs also distribute their weight evenly across multiple legs, allowing them to exploit this physical property of water effectively.
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The sum of 8 and 5 is equal to the difference of a number and 7
Answer:
8+5 = x - 7
Explanation:
a number is X
sum means addition
difference means subtraction
To solve: You need to isolate x on one side of the equation (one side of the = sign). To do this, add 7 to both sides so you can move it from one side to the other:
8 + 5 = x - 7
+7 +7
As you can see, adding 7 will cancel out the - 7 on the right side, and move it to the left. Now the equation you are left with is
8 + 5 + 7 = x
Finally add the numbers together and you will get your value for x.
8 + 5 + 7 = 20
20 = x
We have that for the Question "The sum of 8 and 5 is equal to the difference of a number and 7" it can be said that The value of x is
[tex]x=\frac{13}{7}[/tex]
From the question we are told
The sum of 8 and 5 is equal to the difference of a number and 7
Generally the equation for the Statement is mathematically given as
[tex]8+5=x+7\\\\Therefore\\\\x=\frac{8+5}{7}\\\\[/tex]
[tex]x=\frac{13}{7}[/tex]
Therefore
The value of x is
[tex]x=\frac{13}{7}[/tex]
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how does surface-to-volume ratio relate to the size of a cell
A. small cells have a greater surface-to-volume ratio than larger cells
B. surface-to-volume ratio remains constant as cells increase in size
C. there is no relationship between surface-to-volume ratio and cell
D. small cells have a smaller surface-to-volume ratio than larger cells
Answer:a
Explanation:
The surface-to-volume ratio decreases as cells increase in size, affecting their ability to exchange materials efficiently. Small cells have a greater surface-to-volume ratio than larger cells, enabling more effective nutrient uptake and waste removal.
The relationship between the surface-to-volume ratio and the size of a cell is significant in understanding how cells function and survive. A cell's surface area-to-volume ratio is crucial for its ability to acquire nutrients, dispose of waste, and overall interact with its environment. As cells grow in size, their surface area-to-volume ratio decreases.
Small cells have a greater surface-to-volume ratio than larger cells. This higher ratio is advantageous because it allows for more efficient exchange of materials between the cell and its external environment. The surface of the cell is where nutrients are absorbed and waste is expunged, so a larger surface area relative to the cell's volume enables these processes to occur more effectively.
In contrast, as cells increase in size, the surface area does not keep up proportionally with the volume, which leads to a decreased surface-to-volume ratio. This condition can limit the cell's efficiency in exchanging materials, potentially inhibiting growth, function, and reproduction. Therefore, cells often divide when they reach a certain size to restore a more favorable surface-to-volume ratio. This principle explains why smaller cells are generally more effective at nutrient uptake, waste removal, and overall metabolic function compared to larger cells.
what are two ways scientists can describe the quality of measurements
Answer:
To describe a scientist as skeptical means that they question both existing ideas and new hypotheses. Skepticism is considered a valuably quality in a scientist because they must be able to evaluate the strengths and weaknesses of a hypothesis.
Precision and validity of the measurement are the two ways scientists can describe the quality of measurements.
Explanation:
The quality of the measurement from time innumerable is based on quantity and magnitude. The scientists describe the quality of the measurements by comparing the existing ideas and new hypotheses.
Quality of measurements can be done by precision and validity of the measurement. Measurements are derived by performing calculations, applications to derive accuracy and precision towards attaining the quality of measurement.
Two genes for the same trait are compared. Which one is not an example of a mutation?
In the first, the series is adenine followed by two thymine; in the second, adenine is followed by two thymine.
In the first, the series is cytosine - adenine - thymine; in the second, it is cytosine - adenine - adenine.
The first has thymine where the second has a guanine.
The first has a series of three nucleotide bases; the other has a series of four.
Answer:
The cytosine-adenine-adenine pair is not an example of mutation.
Explanation:
In the base pairing of DNA, adenine bonds only with thymine and guanine bonds with cytosine. As guanines and adenines are purines and thymine and cytosine are pyrimidine in DNA, and due to their structure, there is only small space in between them to fit a purine and pyrimidine and not more than that.
Therefore, these constructions of two adenines are not possible with cytosine. Thus, this cannot be an example of mutation.
The sun's energy is classified by the ____
A. temperature of the wavelength
B. range of its wavelengths
C. amount of visible light emitted
D. amount of radiation given off
Final answer:
The sun's energy is classified by the 'range of its wavelengths', which make up the electromagnetic spectrum, including visible light.
Explanation:
The sun's energy is emitted in the form of electromagnetic radiation, which includes a range of different wavelengths. These wavelengths each have their own characteristic energy, and together they make up the electromagnetic spectrum. The correct answer to the question is B. range of its wavelengths, as the sun emits electromagnetic radiation at different wavelengths, from very short gamma rays to very long radio waves. Visible light, a part of this spectrum, ranges from violet at 380 nm to red at 750 nm.
Sonu' s mother served a glass of hot milk before his going to school.As sonu was in a hurry he forgot to drink the milk. Unfortunately his mother has also gone out. When they came back home, sonu noticed the changes in the milk,which was no more a milk,but set into a thick substance called curd.
Based on this situation answer the following questions:
a. What is this process of setting milk into curd known as?Is this a physical/chemical change?
b. Is this change harmful ?
c. How does it happen?
Its your choice that whether you want to answer all the 3 questions or just 2 of them.
Answer:
A.) Chemical B.) Yes, it is very harmful. C.) It was out for around eight hours and was hot making the chemical change happen faster.
Explanation:
It is chemical because you cannot change it back to its original form
Please dont give me brainliest btw
Final answer:
The setting of milk into curd is a chemical change known as fermentation and is not typically harmful. It occurs when specific bacteria convert lactose into lactic acid, leading to the coagulation of milk proteins into curd.
Explanation:
The process of setting milk into curd is known as fermentation, which is a type of chemical change. The transformation of milk into curd involves the conversion of lactose into lactic acid by the action of bacteria, which alters the chemical composition of the milk, causing the milk proteins to coagulate and form curd.
Is this change harmful? The answer is generally no, as this process of fermentation is typically how dairy products like yogurt and cheese are made, and consuming these products is a part of many healthy diets. However, if the milk was curdled due to spoilage and not in a controlled fermentation process, it could be harmful to consume.
To explain how it happens; Adding a fermenting agent, often a bit of preformed curd containing microbes, to warm milk starts the process. These microbes consume lactose in the milk and produce lactic acid, which reduces the pH and causes the milk to coagulate, forming curd. The conditions surrounding this process, such as temperature and time, can affect the outcome and texture of the curd.
The blank system eventually empties into the blank system via A duct near the heart so that chylomicrons can circulate to all body tissues
Answer:
Chylomicrons are particles of triglycerides, phospholipids, protein and cholesterol that circulate in the body tissues through the lymphatic duct via the subclavian veins near the heart.
Explanation:
Chylomicrons originate from the intestine and it secretes in the lymphatic system that connects the subclavian vein of the heart and the blank system or circulation system.
It primarily transfers to the heart muscle where through the lymphatic duct which is near the heart and the subclavian vein that is connected to the blood vessels it circulates to all the body tissues.
Identify the process used to form the covalent peptide bonds that join amino acids into a polypeptide.
Answer:
Condensation reaction
Explanation:
Covalent peptide bond is formed between two amino acids. It is formed by condensation reaction which is also called as dehydration synthesis reaction. One molecule's carboxyl group reacts with other molecule's amino group releasing a water molecule. This CO-NH bond is called as peptide bond or amide bond and an amide molecule is formed as a result.
An amide bond shows resonance which allows its stabilization and versatility of molecule in different environment. The amino acids link together via condensation reaction to form larger polypeptide chains.
How many electrons does an atom of carbon have?
Answer:
2, 4
Explanation:
Answer:
six electrons
Explanation:
Stars on the upper left end of the main sequence differ from those on the lower right end in what way
Answer:
The answer is B.
Explanation:
Final answer:
Stars on the upper left end of the main sequence are high-mass, bright, and hot while those on the lower right end are low-mass, cooler, and less luminous. The most massive stars leave the main sequence early to become red supergiants, and over time, less massive stars follow, becoming red giants.
Explanation:
Stars on the upper left end of the main sequence are significantly different from those on the lower right end. The main sequence stars are characterized by a continuum of stellar masses and their corresponding luminosity and temperature. Stars on the upper left are high-mass stars with high temperatures and high luminosities, making them very bright and hot. Conversely, stars on the lower right are low-mass stars, which are much cooler and less luminous, placing them among the dimmest visible stars.
As time goes on, star clusters change and evolve. Within a cluster, you can notice that after approximately 4 billion years, many stars - even those just a few times more massive than the Sun - will leave the main sequence to become red giants or super giants. The most massive stars leave the main sequence relatively quickly and eventually make their way to becoming red supergiants, while less massive stars become red giants. This evolutionary path is seen on the H-R diagram where stars move from the main-sequence band to the upper right as they become simultaneously more luminous and cooler.
Which rock has the highest metamorphic grade
Answer:
Gneiss
Explanation:
The Gneiss rock is the highest grade metamorphic rock, contains bands of easily visible quartz, feldspar, and/or mica.
Answer:
The correct answer is Gneiss.
Explanation:
Metamorphic rocks refer to the rocks that get modified due to pressure, heat, and chemical procedures, generally while buried deep underneath the surface of the Earth. Getting exposed to these extreme conditions change the texture, mineralogy, and chemical composition of the rocks.
There are two fundamental kinds of metamorphic rocks known, these are foliated metamorphic rocks like gneiss and non-foliated metamorphic rocks like quartzite. Of the metamorphic rocks, the highest grade metamorphic rock is gneiss. It exhibits a banded appearance and is formed of granular mineral grains. It usually comprises enough amount of feldspar or quartz minerals.
a blastocyst is a group of cells that forms after a human egg is fertilized. The blastocyst consist of two types of cells. Some of these cells develop into all of the cells of a growing fetus. What do the other cells develop into?
A. The Umbilical Cord
B. The Placenta
C. The Embryo
D. The Fetus
The blastocyst is split into two cell types: the inner cell mass, which becomes the fetus, and the trophoblast cells. The latter transforms into the placenta, supplying nourishment and removing waste for the developing fetus.
Explanation:A blastocyst is an early stage in human embryonic development that forms a few days post-fertilization. The blastocyst comprises two kinds of cells: the inner cell mass (ICM) and the trophoblast. While the ICM cells develop into the embryo (eventually becoming the fetus), the trophoblast cells are responsible for developing into another crucial part of the gestational system. These cells transform into the placenta, the organ that provides nourishment to the growing fetus and removes waste products.
So, to answer your question, the other cells - the trophoblast cells in the blastocyst - develop into the placenta (Option B).
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What percentage of precipitation falls back onto land? a. 78% b. 92% c. 17% d. 22%
22% percentage of precipitation falls back onto land.
Answer: D. 22%
Explanation:
Water cycle is the phenomenon in which both evaporation and condensation or precipitation of water takes place. Water evaporates from the lakes, ponds, oceans and other water bodies to the atmosphere because of the heat.
The evaporated water or water vapour then form clouds which gets precipitated or condensed and falls back to the land in the form of rain, snow, hail storm, sleet etc.
However, all the forms that fall into the land have one thing in common i.e., all of them come from clouds as the clouds get heavy by the evaporated water.
About 22% of all precipitation falls back onto land, as part of the water cycle where the majority of precipitation (approximately 78%) falls onto the oceans.
Explanation:To understand the question, let's discuss briefly about the water cycle.
The water cycle describes how water from the land and oceans enters the atmosphere by evaporation or sublimation, where it condenses into clouds and falls as rain or snow in a process called precipitation. This precipitated water may enter freshwater bodies or infiltrate the soil. Eventually, this surface or groundwater reenters the ocean, completing the cycle.
Although the specifics can vary based on the climate, local topography, and other factors, approximately 22% of all precipitation ends up falling back onto land (option d). This happens because the rest of the precipitated water (around 78%) falls onto the oceans themselves.
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TIME REMAINING
54:50
Jennifer attends school everyday, but when she goes home she decides not to do her homework or study for tests, so
she has poor grades. Which of the following statements about Jennifer is true?
A. Jennifer is not fulfilling her duties to become a productive citizen.
B. Because Jennifer is attending school, she is fulfilling all of her educational civic duties.
C. Jennifer could face consequences for not obeying the law.
D. Jennifer is focused on critical thinking and problem solving.
Please select the best answer from the choices provided
Please select
US
Answer:
the answer is A
Answer:
it's A
Explanation:
HELP PLEASE!!!!!!!!! What is the difference and similarities between convection, conduction and radiation?
Answer:
Well these are all ways to move heat from one thing to another. However, the ways the heat is moved is different in each way.Which observation can BEST be explained by the scattering of light
Answer: Examples of scattering of light: light, sound, or moving particles
Explanation:
Answer:
A red rainbow
Explanation:
A red rainbow also know as a monochrome rainbow, appears rarely at sunrise or sunset. During this period of the day, sunlight travels through longer paths of the lower atmosphere and shorter wavelenghts such as blues and greens scatter through the journey leaving the remaining light richer in reds and yellows, which create a beautiful red rainbows.
What is the significance of the Galapagos Islands to the Theory of Evolution?
A.It is where Charles Darwin was exiled.
B.It is where Charles Darwin wrote "On the Origin of Species.
C.It is where Charles Darwin was born.
D.It is where Charles Darwin saw a variety of new organisms and fossils.
Final answer:
The Galapagos Islands are significant to the Theory of Evolution because it's where Charles Darwin made key observations of unique species that led to his development of the theory of natural selection. (Option B)
Explanation:
The significance of the Galapagos Islands to the Theory of Evolution is that they are where Charles Darwin made critical observations that influenced his ideas about natural selection. During his voyage on the HMS Beagle, Darwin studied the unique wildlife on different islands, noting that species were similar yet had distinct adaptations to their specific island environments. For example, the finches on the islands had varied beak shapes that were suited to different types of food sources, illustrating evolutionary adaptation.
It was these observations that eventually led to Darwin's formation of the theory of evolution by natural selection. Particularly, Darwin's studies of the Galapagos tortoises and finches highlighted how species could diverge and adapt based on environmental pressures and available resources, a cornerstone concept of evolutionary biology.
In 1990, scientists at the National Institutes of Health used gene therapy to try to treat a 4-year-old girl suffering from severe combined immunodeficiency disease (SCID). This genetic disease made her extremely susceptible to infections. The scientists used a virus to inject normal genes into the girl's immune system cells. The experiment was moderately successful, and the girl's health improved but only for short periods of time. If this form of gene therapy could be fine-tuned, how would it impact society? A. People would need to be genetically tested before having children together. B. Many genetic diseases would be curable. C. The number of infections from genetically-engineered viruses would increase. D. Most Americans would no longer suffer from heart disease.
Answer:
B. Many genetic diseases would be curable.
Explanation:
Gene therapy is intended to acquaint hereditary material into cells in order to compensate for faulty or mutated genes or to make a helpful protein. On the off chance that a faulty gene makes a beneficial protein be flawed or missing, gene therapy might have the option to present a typical duplicate of the gene to reestablish the function of the protein.
A gene that is embedded straightforwardly into a cell as a rule doesn't work. Rather, a bearer or carrier called as a vector is hereditary built to insert the desired gene.
Answer: Many genetic diseases would be curable.
Explanation: The successful use of gene therapy would allow doctors to cure, rather than simply treat, genetic diseases.
Proof that I am right look at the Image And rate 5