The zebra mussel is originally native to the Black and Caspian Seas of Asia. Zebra mussels were first detected in the Hudson River of New York in 1991. Before the arrival of zebra mussels, the Hudson River supported populations of native mussels. (a) Describe ONE way an invasive species, such as the zebra mussel, can decrease the carrying capacity for a native species in an ecosystem. B) Describe ONE characteristic of an r-selected species that could increase the likelihood of the r-selected species being a more successful invasive species than K-selected species. (c) Scientists want to reduce the population of zebra mussels in the Hudson River. (i) Propose a practical solution for reducing the zebra mussel population in the Hudson River. (ii) Describe ONE potential negative ecological consequence of your proposed solution for reducing the zebra mussel population in the Hudson River
Answers
(a) An invasive species like the zebra mussel can decrease the carrying capacity of a native species in an ecosystem by outcompeting them for resources such as food and space. Zebra mussels are filter feeders and can filter large amounts of phytoplankton from the water, which is the main food source for many native mussel species. As a result, the native mussels may not be able to get enough food and can starve to death.
(b) An r-selected species is characterized by a high reproductive rate, a short lifespan, and the ability to colonize new habitats quickly. These traits could increase the likelihood of r-selected species being more successful invasive species than K-selected species because they can reproduce rapidly and establish large populations in a short amount of time. This can enable them to quickly dominate and outcompete native species for resources.
(c) (i) One practical solution for reducing the zebra mussel population in the Hudson River could be to introduce a natural predator that feeds on zebra mussels. One example of a potential predator is the round goby, which is known to feed on zebra mussels.
(ii) One potential negative ecological consequence of introducing a predator to control zebra mussels is that it may also impact other species in the ecosystem. For example, the introduction of a new predator could affect the population dynamics of other native species in the Hudson River, including those that are not considered invasive. Additionally, there is a risk that the predator may become invasive itself and cause further damage to the ecosystem. Therefore, careful consideration and monitoring would be necessary before implementing such a solution.
a) One way an invasive species, such as the zebra mussel, can decrease the carrying capacity for a native species in an ecosystem is by outcompeting the native species for resources, such as food and habitat. Zebra mussels are filter feeders that can remove large amounts of phytoplankton and suspended particles from the water, which can reduce the food supply for native species, such as fish and other aquatic organisms. Additionally, zebra mussels can attach to and cover native mussel shells, which can prevent them from feeding, breathing, and reproducing.
b) One characteristic of an r-selected species that could increase the likelihood of the r-selected species being a more successful invasive species than K-selected species is their ability to reproduce rapidly and produce large numbers of offspring in a short period of time. R-selected species typically have a short generation time and allocate more resources toward reproduction than towards survival or parental care. This can give them an advantage in colonizing and dominating new environments, where resources are abundant and competition is low.
c)
(i) One practical solution for reducing the zebra mussel population in the Hudson River is to introduce a biological control agent, such as a parasitic flatworm or bacteria, that can infect and kill zebra mussels. These agents could be introduced in areas with high zebra mussel populations and could help reduce their numbers over time.
(ii) One potential negative ecological consequence of introducing a biological control agent to reduce the zebra mussel population in the Hudson River is that the agent could also affect non-target species. For example, the parasitic flatworm or bacteria could also infect and harm native mussel species or other aquatic organisms, leading to unintended ecological consequences. Therefore, it is important to carefully evaluate and test any proposed solutions before implementing them to ensure that they are effective and do not cause additional harm to the ecosystem.
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Related Questions
Describe a insert mutation
Answers
Answer:
An insertion, as related to genomics, is a type of mutation that involves the addition of one or more nucleotides into a segment of DNA. An insertion can involve the addition of any number of nucleotides, from a single nucleotide to an entire piece of a chromosome.
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List three questions about the human-honeyguide symbiosis that could be answered with further research.
Answers
Answer:1. do honeyguides in different areas of the world have a similar symbiosis with humans?
2. how old are the birds when they learn to respond to the humans' calls?
3. could other birds in the region form a similar symbiosis with humans?
Explanation:
Answer:
1. Would different honeyguides in different areas respond to these calls the humans make?
2. Would other birds nearby be able to share a similar symbiosis with humans?
3. Are there other sounds that honeyguides might respond to?
perform the session at least once per week for four weeks. Symptoms were rated as mild, moderate, or severe. 1. What is the research question for this study? A. Do reflexology session reduce the severity of symptoms for breast cancer patients? B. Do weekly telephone calls reduce the severity of symptoms for breast cancer treatments? C. Are race, age, and level of education related to the effectiveness of reflexology sessions and weekly telephone calls? D. Can friends and family members of breast cancer patients learn to perform reflexology sessions? 2. Consider the study above. Match each statistical term to the appropriate aspect of the study. Note, you won't use all the available phrases from the right column. 1. Control group A. 13 medical symptoms 2. Response variable B. All patients undergoing treatment for breast cancer C. Whether patient has breast cancer or not D. All people trained to give reflexology sessions 3. Treatment group E. 256 patients undergoing treatment for breast cancer F. The change in breast cancer symptoms 4. Explanatory variable G. Patients who received only weekly telephone calls H. Whether a patient received reflexology sessions or not 5. Population of interest I. Trained data collectors J. Patients who received reflexology sessions and weekly telephone calls 6. Sample K. All adults living in the Midwest 3. Does this study make use of blinding? because A. All 256 breast cancer patients received weekly telephone calls. B. Half of the caregivers were not trained to give reflexology sessions. c. The breast cancer patients knew whether they were receiving reflexology sessions or not. D. The data collectors were trained to be impartial in the recording of patient responses.
Answers
The research question for this study is: A. Do reflexology sessions reduce the severity of symptoms for breast cancer patients?
Matching statistical terms to the appropriate aspects of the study:Control group: G. Patients who received only weekly telephone callsResponse variable: F. The change in breast cancer symptomsTreatment group: J. Patients who received reflexology sessions and weekly telephone callsExplanatory variable: H. Whether a patient received reflexology sessions or notPopulation of interest: B. All patients undergoing treatment for breast cancerSample: E. 256 patients undergoing treatment for breast cancerThis study does make use of blinding because:D. The data collectors were trained to be impartial in the recording of patient responses.Blinding refers to keeping certain individuals or groups unaware of specific treatment assignments or conditions in order to minimize bias. In this case, the data collectors being trained to be impartial indicates that they were likely blinded to the treatment assignments or whether the patients received reflexology sessions or not.
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in females that are heterozygous at an x-linked locus, approximately % of the cells express one allele. please choose the correct answer from the following choices, and then select the submit answer button. answer choices 50
Answers
In females that are heterozygous at an X-linked locus, approximately 50% of the cells express one allele.
In female cells, one of the two X chromosomes is randomly inactivated during embryonic development, a process known as X-inactivation. X-inactivation is a process that occurs in female cells, in which one of the two X chromosomes is randomly inactivated during embryonic development. The inactive X chromosome becomes highly compacted and forms a structure called a Barr body.
In this way, females have a balanced expression of genes from both X chromosomes, just like males with their single X chromosome. In a heterozygous female, the cells that express one allele are those in which the inactive X chromosome carries the gene from that allele. Approximately 50% of cells will express one allele because the inactivation of the X chromosome is random and unpredictable.
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A 911 call is made to police. Upon arrival to the crime scene (10:00 pm). investigators
Discover the body of a black male who has been hung. The liver temperature of the body
registered 93°F. What was the approximate time of death of the victim?
a. 5:00 pm
b. 5:00 am
c. 7:00 pm
d. 7:00 am
Answers
Answer:
C
Explanation:
The approximate time of death of the victim would be 5:00 pm. Thus, the correct option for this question is A.
What happened to the liver after the death of an individual?The liver forms an accumulation around it which is known as Mortis. It occurs within 20 to 30 minutes after death and lasts for the first 12 hours. It is the change in body color caused by blood flowing to the lowest points of the body due to gravity pulling it down.
According to the context of this question, 5:00 pm would be the most appropriate time because after 5 hours, i.e. 10:00 pm police and investigators arrived. At that time, investigators discover that the body of a black male who has been hung. So, in these 5 hours, the Mortis formed around the liver which causes a gradual decrease in the average temperature of a victim.
Therefore, the approximate time of death of the victim would be 5:00 pm. Thus, the correct option for this question is A.
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a population was scored for the mn blood type locus. there were 121 type m, 327 type mn, and 262 type n individuals in the population. calculate the frequency of the m allele in this population.round your answer properly to four decimal digits.
Answers
The frequency of the m allele in the population is 0.4679.
The frequency of the m allele can be calculated by using the Hardy-Weinberg equation as follows:
p² + 2pq + q² = 1; where p is the frequency of the m allele and q is the frequency of the n allele.
From the given information, we know that:
m = 121 + 0.5(327) = 284n = 262 + 0.5(327) = 408
The total number of alleles in the population is:2(121 + 327 + 262) = 1420
Using the above equation, we can write:
284/1420 = p² + 0.5(327/1420)p² + 0.23098591 = 0.20000000 + 0.23098591p² = 0.01901409p = 0.13794034
Therefore, the frequency of the m allele in the population is:
p = 0.1379 (rounded to four decimal digits)p = 0.4679.
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Identify whether each of the following statements identifies a microeconomic issue or a macroeconomic issue.
Answers
It is possible to tell whether a remark affects a macroeconomic or microeconomic issue by looking at the following:
1. When Mika bargains for capital equipment for her company, a micro-economic issue is at play.
The fact that inflation has an impact on the entire economy makes it a macroeconomic problem.
3. A macroeconomic issue is the declining unemployment rate.
4. When Value Petrol cuts gasoline prices aggressively, it is a microeconomic problem.
Microeconomics is a subfield of economics that focuses on how people and businesses allocate resources and react to various economic factors like price, resource availability, and competitive pressures.
Inflation, unemployment, GDP, and growth rate are all studied as aggregates in macroeconomics. Without focusing on the choices made by specific actors, it encompasses the entire economy.
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Identify whether each of the following statements identifies a microeconomic issue or a macroeconomic issue.
a. Mika negotiates a long-term contract for capital equipment for her property management business.
b. Inflation was fueled by an increase in rent and energy prices.
c. The unemployment rate has decreased for the second consecutive quarter.
d. Value Petrol lowers the prices of all grades of gasoline in response to a newly opened competitor.
What is the benefit of having some of the cellular organelles enclosed by a membrane similar to the plasma membrane
Answers
Answer:
Like the plasma membrane, organelle membranes function to keep the inside "in" and the outside "out." This partitioning permits different kinds of biochemical reactions to take place in different organelles.
Similar to the plasma membrane, the membranes of cell organelles functions in order to keep the internal atmosphere of the organelle separate with respect from its outer environment.
What do you mean by Cell organelles?Cell organelles may be defined as one of the functional characteristics of eukaryotic cells. Cell organelles are specialized structures that significantly perform various functions inside cells in order to assist living organisms. These are compartmentalized structures.
Some examples of membrane-bound cell organelles are mitochondria, endoplasmic reticulum, chloroplast, etc.
One more specific property of membranes of cell organelles is that they authorize numerous kinds of biochemical reactions to occur inside each distinct organelle. For example, ATP synthesis or energy production in the mitochondria, photosynthesis in the chloroplast, etc.
Therefore, make the separation between the internal environment of the organelle with respect to its outer atmosphere is the characteristic feature of the membranes.
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PLSSS HELP IF YOU TURLY KNOW THISS
Answers
Answer:
Energy
Explanation:
it's not/can't be any of the other answers
A food chain shows animals that survive off of each other's existence (ex. grass-rabbit-hawk) and energy is basically a fancy word for food (because food gives us energy).
A food chain represents one possible path that energy can flow through an ecosystem. (food = energy )
Once you’ve decided on your three organisms, the next step is to ask questions about the characteristics of the organisms you chose. This step will help you complete the Venn diagram. Here are a few questions to help you:
How many stages are present in the life cycles of these organisms?
Does a metamorphosis occur during their life cycles?
How do these organisms gain energy for their growth?
Where do these organisms live on Earth?
Can these organisms move freely?
What type of reproduction do these organisms have?
Are the organisms genetically identical or different from their parents?
Do these organisms produce many or few offspring at one time?
What other specialized structures or reproductive strategies do these organisms have?
life cycle: an organism’s stages of growth and development that lead to the production of offspring
Write down two additional questions you’ll research.
URGENTT
Answers
Hormones in the bloodstream are what
Answers
Answer:
chemical messenger.
Explanation:
yw loves!!!!
Answer:
CHEMICAL MESSENGER
Explanation:
did the Assignment
In what year did camillo golgi find golgi bodies and what did he use and how did he use it? I need the answer quickly!!!!!!!!
Answers
Answer:
Camillo Golgi was an Italian scientist who discovered Golgi bodies in 1873. He used them as a landmark to describe cellular structure in the brain. They're composed of stacks of membranes, each one containing a set of proteins called Golgi apparatus proteins. This stack can extend from 1 to 10 micrometers thick
Answer: He established two types of malaria, tertian and quartan fevers caused by Plasmodium vivax and Plasmodium malaria respectively. In 1886, he discovered that malarial fever (paroxysm) was produced by the asexual stage in the human blood (called erythrocytic cycle, or Golgi cycle).
A process for determining whether data from genetic crosses are consistent with a specific pattern of inheritance is called?
Answers
Data from the genetic crosses are consistent with the specific pattern of the inheritance is called as Punnett square
The Punnett square is the table in which the all of the possible outcomes for the genetic cross between the two individuals with the known genotypes are given. In its the simplest form, the Punnett square was consists of the square divided into the four quadrants. A Punnett square was a chart that is allows you to easily determine the expected the percentage of the different genotypes in the offspring of two parents. An example of the Punnett square for the pea plants is shown as below. In this example, both the parents are heterozygous for the flower color (Pp).
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What is the net yield of atp when palmitate (c16) is completely oxidized via the β-oxidation pathway?
Answers
One palmitate molecule, a fatty acid with 16 carbons, completely oxidized to produce 129 ATP molecules.
Calculating the net ATP yield, which is the result of the difference between the total amount of ATP created and the total amount of ATP consumed, is necessary to determine the energy yield: In the electron transport chain, 1 FADH2 generates 2 ATP and 1 NADH generates 3 ATP. One acetyl-CoA, one NADH, and one FADH2 molecule are created during each cycle of -oxidation.
In 7 cycles of mitochondrial beta-oxidation, oxidation of palmitic acid results in 7 NADH, 7 FADH2, and 8 acetyl-CoA. During the Krebs cycle, each acetyl-CoA produces 3 NADH + 1 FADH2 + 1 GTP (=ATP). With the respiratory chain producing an average of three ATP/NADH and two ATP/FADH2 molecules, you have 131 ATP molecules. However, each fatty acid that will be oxidized in the mitochondria must first be activated using two ATP molecules.
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Which greenhouse gas is produced by commercial refrigeration and air conditioning systems?
Answers
Answer: it is nitrous oxide
The greenhouse gas, such as hydrofluorocarbon, that is emitted from commercial air conditioners and refrigerators. These greenhouse gases increase the earth temperature.
What is a greenhouse gas?
Greenhouse gases are the major reason for global warming. Gases such as carbon dioxide, hydrofluorocarbon, and water vapor are the major greenhouse gases. These gases, when present in large amounts, raise the temperature of the earth.
Short radiation enters the Earth but returns as longer radiation. When these greenhouse gases are present in abundance, they don't let the radiation pass. As a result of this radiation, the earth's temperature increases. Due to this, the ice in the polar regions melts, the water level rises, and animals and plants can't do their cellular activities properly.
There are many other effects that can be seen, such as air pollution, natural calamities, less production of foods as agricultural land goes sterile, etc. These greenhouse gases are derived from many man-made things, such as refrigerators, air conditioners, vehicles, etc.
Hence, greenhouse gases such as hydrofluorocarbons are emitted from commercial air conditioners and refrigerators.
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During embryological development, the ventral body cavity subdivides into how many chambers?
Answers
During embryological development, the ventral body cavity subdivides into fours chambers.
What is an embryo?An embryo is a developing baby inside the womb of a woman.
The embryo is formed during the initial stage of development between the time period of the first week of fertilization to about eight weeks.
The period of embryonic development is the most critical time period of the developing baby as it is the period when the body organs and tissues develop.
In conclusion, embryonic development is critical to the development of the fetus.
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Are Viruses Alive? Venn Diagram
Directions: Use the word bank provided to complete the Venn diagram below. Then complete the exercise
below.
Word Bank
Capsid
Cell Membrane
Nucleus
Evolve
RNA
Cell organelles
Envelope
Heredity
Homeostasis
DNA
Ribosomes
Develop
Cell
Virus
Answers
Answer:
Viruses are not alive
Explanation:
Viruses are acellular structures capable of performing some biological functions.
What are viruses?Viruses are parasitic structures made of an outer protein capsid and genetic material which are able to replicate in a living cell and thus cause infection in the cell.
Viruses hijack the replicative machinery of the host to produce copies of its own genetic material. A single infected cell is capable of producing thousands of viruses.
The virus only injects the nucleic acid inside the target cell, the envelope and capsid are left outside. The hijacked genetic machinery of the host produces further copies of the nucleic acid, capsid and envelope.
These structures are assembled to give rise to new viruses.
If a large number of viruses are synthesized rapidly, it results in cell lysis. This type of infection is called the lytic cycle.
If the virus genome incorporates with the host genome, it is present there silently and being replicated. Upon receiving an activation signal lytic cycle is activated. It is called the lysogenic cycle
Therefore, viruses are acellular structures capable of performing some biological functions.
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Answer soon pls
Which phase of cell division is shown?
Exploring mitosis.
telophase I
prophase I of meiosis
anaphase II
telophase II
Answers
also, the answer is anaphase II
Answer: Anaphase II
I took the 3.09 Quiz: Meiosis and Mitosis.
which best describes a gene
A.chromosome
B. a sister chromatid
C. a tetrad
D. a piece of a chromosome
Answers
Answer:
D, a piece of a chromosome
Explanation:
Answer:
D.a piexe of chromosome
Explanation:
because a gene is a segment of dna that codes for a trait
Starting with one double-stranded dna molecule, how many cycles of pcr would you have to perform to produce about 100 double-stranded copies (assuming 100fficiency per cycle)?
Answers
Starting with one double-stranded DNA molecule, 7 cycles of PCR would you have to perform to produce about 100 double-stranded copies (assuming 100 efficiency per cycle).
PCR Product = \(2^{n}\)
n= Number of Cycle
PCR- Its basic idea is based on the replication of certain DNA sequences in-vitro using DNA polymerase. This technique may produce tens of billions of copies of a specific DNA fragment from a DNA extract (the sequence of interest, DNA of interest, or target DNA) (DNA template).
DNA- The molecule found inside cells that carries the genetic material necessary for an organism to grow and operate. This knowledge may be handed forward from one generations to the next thanks to DNA molecules.
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An mRNA sequence was changed from
CGU UUU AAA to CGU UUA AA. What type
of mutation occurred? Select all that
apply.
deletion
Indel
Point mutation
Frameshift
Insertion
Nonsense mutation
Answers
Answer:
deletion, indel, frameshift
Explanation:
carry electrical charges at opposite poles.
A . nonpolar bonds
B. polar bonds
C. hydroelectric bonds
D. lonic bonds
Answers
Answer:d
Explanation:
Which of the following is not a benefit to humans from biodiversity?
A. Many medications are made from living organisms
B. Enjoyment from recreational activities
C. We have a variety of products produced for clothing, food, and other items
D. The weather is more comfortable
Answers
For me it's letter A.
Because B and C and D are benefits of biodiversity....So that's why,for me it's letter A.
Well,don't trust me if you don't want to
1. Which of the following characteristics is not shared by ALL cells?
A) Have internal, membrane-bound compartments.
B) Capable of transcription and translation.
C) Capable of respiration.
D) Utilize enzyme driven reactions.
2. Which of the following structures contains the thylakoid membranes?
A) The Nucleus.
B) Lysosomes
C) Mitochondria
D) Chloroplasts
Answers
1. The characteristic that is not shared by ALL cells is "Have internal, membrane-bound compartments." .2. The structure that contains the thylakoid membranes is Chloroplasts
Explanation:Cells come in all shapes and sizes, but they all have a few things in common. For example, they all have a cell membrane that separates them from the surrounding environment. They also have cytoplasm, which is a fluid-like substance that fills the inside of the cell.
Additionally, they all have DNA, the genetic material that controls the cell's activities. While all cells share these characteristics, they do not all have internal, membrane-bound compartments. For example, bacteria are a type of cell that lacks these compartments.
2. The structure that contains the thylakoid membranes is Chloroplasts. Explanation: Chloroplasts are organelles found in plant cells that are responsible for photosynthesis. They contain a complex system of membranes called thylakoids, which are arranged in stacks called grana.
These membranes are the site of photosynthesis, the process by which plants convert sunlight into energy. The other options in the question do not contain thylakoid membranes.
The nucleus contains DNA, lysosomes contain enzymes that break down waste products, and mitochondria are the site of cellular respiration.
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I need help with this ASAP
Answers
Answer: tissues, organs, organ system
Explanation:
goes from top to bottom
hybrids hide one expression of a trait that reappears when hybrids are self-crossed because blank .
Answers
Hybrids hide one expression of a trait that reappears when hybrids are self-crossed because of segregation.
Segregation refers to the separation or sorting of different alleles during the formation of gametes (reproductive cells). In hybrids, one allele for a specific trait may be dominant and masks the expression of the recessive allele.
However, when hybrids are self-crossed, the alleles segregate during gamete formation, resulting in the re-emergence of the hidden trait. This is due to the fact that each parent contributes one allele for each trait to their offspring, and during meiosis, the alleles segregate independently into different gametes. As a result, the hidden trait can reappear in the offspring of the self-crossed hybrids.
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The correct question is:
Fill in the blanks:
Hybrids hide one expression of a trait that reappears when hybrids are self-crossed because _________.
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Two objects are being lifted by a machine. One object has a mass of 2 kg, and is lifted at a speed of 2
m/s. The other has a mass of 4 kg and is lifted at a rate of 3 m/s. What does this tell you about the variable(s) that impact gravitational potential energy?
Answers
Impact on gravitational potential energy is that the object which has greater Kinetic energy will have less potential energy, like object 2 has greater KE and less potential energy and object 1 has less KE and greater potential energy
It is given that
mass of 1 object = 2 kg
speed of 1 object = 2 m/s
mass of 2 object = 4 kg
speed of 2 object = 3 m/s
Kinetic energy = 1/2 x m x v^2
KE(1) = 1/2 x 2 x (2)^2
KE(1) = 1/2 x 2 x 4 = 4 Joule
KE(2) = 1/2 x 4 x (3)^2
KE(2) = 1/2 x 4 x 9 = 18 Joule
As the height increases, there is an increase in the gravitational potential energy and a decrease in the kinetic energy . The kinetic energy is inversely proportional to the potential energy
Hence, Kinetic energy of 1 object is 4 Joule and another is 18 Joule
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Compare the number of mitochondria in the different types of cells.
Answers
Answer:
High amounts of mitochondria are found in skeletal muscle cells, as well as liver cells. On the other hand, skin cells have a small amount of mitochondria.
Pesticides sprayed on the plants in fields become
drip onto the soil.
when they settle and
O A. ammonia
O B. pollutants
C. nutrients
D. acid rain
Answers
Answer:
pollutants
Explanation:
have a nice day :)
Answer:
pollutants
Explanation:
What is the function of chloroplasts in a plant cell
Answers
Answer:
function of chloroplast:protectionmaintain shapemaintain rigidity of cellhelp in osmosis__________&___________
Answer:
1) It helps in the process of photosynthesis as it contains chlorophyll to make food.
2) It also contains different colour and colourless pigment.
3) Colourless pigments are used in storage of minerals and water.
4) Non-green pigments are used in the fruits and flowers of the plant.
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