In a study in China, several different varieties of rice were planted in the same field. Crop yields increased by 89 percent compared with fields with a single variety of rice. This occurred because there was a dramatic decrease in disease and the fields remained stable without using pesticides. In addition, the system increased local biodiversity. This is an example of a(n) _______ showing greater productivity and stability than a(n) _______. monoculture; polyculture polyculture; monoculture natural community; agricultural community agricultural community; natural community polyculture; natural community
Answer:
polyculture; monoculture
Explanation:
The polyculture showing greater productivity and stability as compared to monoculture because decrease occur in disease and no pesticides are used on the field which maintain stability. The disease that is present in the field can't affect the crop of different variety due to resistance of crop against this disease or may be of some other reason. Polyculture is recommended by many researchers in order to avoid pest or pathogen infestation to the crop which leads to better productivity.
Which of the following parts of a plant remains on the plant even after several years of growth?
A) Primary xylem B) Primary phloem C) Epidermis D) Cortex
The basic xylem still seems to be present close to the pith even when the plant has grown for a considerable amount of time.
What is the term for a plant's longer growth?Because they permit primary growth, also known as height and height expansion, these three forms of rosette are referred to as primary meristems. With more meristems, broadleaf weeds have the potential to grow larger. Secondary growth does not occur in herbaceous plants.
What is the name of the sprout that lengthens stems and roots?Meristems affect primary, secondary, and tertiary growth. The medial meristems, also known as the vascular system, govern secondary growth whereas root organizational meristems that continue to shoot apical cell structures regulate primary growth.
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100 POINTS HELPP PLEASE
what are 4-5 farming practices that can be used to help increase crop yield without the use of genetically modified crops .
Answer:
1. plant early, plant effectively
2. practice seasonal soil rotation
3. know the yield potential
4. always scout the fields
5. ensure proper water damage.
Explanation:
1. - Choosing the right time to plant is often the most important part of planting. The best strategy to use to increase yields is: if your soil is ready, start planting.
2. - When you are planting season-by-season, it is important to understand how planting recurring crops can affect your overall yield. Planting corn in consecutive years has been proven to be less effective for optimal yields. This means that corn-on-corn planting should only be considered when your soil conditions are strong enough, or your land mass is limited.
3. - It is not just enough to plan your seeds and hope for the best, you should always be sure to understand your field’s growth potential. Understanding the kind of crops you’re planting, and the kinds of seeds you are using, is important when assessing yield potential.
4. - The most sage advice you can receive about how to increase crop yields is by scouting your fields on foot. This will give you a chance to assess soil conditions, notice any weeds cropping up, and check that your crops are growing healthily. There is a lot you can miss when you are passing by your crops at high speeds, so hitting the ground and examining your crops is an important step towards a stronger crop yield.
5. - Water management is essential to crop survival and maximizing your corn’s yield potential. It’s important to ensure your crop is getting enough water, but also that they aren’t being over-watered. Developing a drainage system in your crops can help prevent waterlogging and salinization in your soil, both of which can stifle growth and production.
hope this helps!! :))
The data table shows the number of pumpkin seeds that germinate at different temperatures.
Effect of Temperature on Germination of Pumpkin Seeds
Temperature
Seeds germinated
Trial 1 Trial 2 Trial 3 Trial 4
20°C 60 63 70 62
24°C 75 87 82 78
28°C 86 84 83 84
32°C 69 64 63 66
What is the mode of the data at 28°C?
A.
84.25
B.
83.5
C.
85
D.
84
The mode of the data at 28°C is 84. The correct option is D.
What is a mode?In statistics, the mode is the variate with the highest frequency of occurrence in a given data. The mode is one of the attributes used to measure how centralized the variates within a data set are.
Mode is used as a measure of central tendency because:
It is very easy to calculateIt is not affected by outliersIt is useful to define the properties of a data setIn this case, we are to find the mode of the data at 28°C. The data at this location is 86, 84, 83, and 84.
86 occur just once, 84 occur twice, while 83 also occur just once in the 4 elements data set.
Thus, the mode here is 84 which occurs twice.
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What are silent mutations called?
Silent mutations are also known as missense mutation.
In general, Nucleotide substitutions may lead to no change in the protein sequence which known as silent mutations. so , we can say that a silent mutation is a mutation that occurs within the DNA sequence, but they do not alter the amino acid sequence. These mutations takes place when in an introns, that is spliced before translation.
Hence, example may include Single nucleotide substitutions they are not involved in changing any of the amino acid sequence so termed as silent polymorphisms. Mutation in these base pair will also not change the function of the protein.
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Suppose that most of the 25 ants on stumps stopped between 5 to 8 meters from the feeder and started nest-searching behavior, but one ant kept walking until it was 11 meters from the feeder.
How would this change the length of the whiskers in the box-and-whisker plot shown in Test 1?
The right whisker would have been longer and also the left whisker would be the same length.
The bottom and higher ends of where the ants paused to search are shown by the whiskers. The whisker on the right would be longer if one ant had walked 11 meters, showing a shift in the upper extreme.
To analyse a dataset's distribution, a box plot is employed. A box and two lines make up the box plot. We call the two lines "whiskers." The lowest number is shown at the end of the first line, and the highest number is shown at the end of the second line.
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Megan and Juan drew the chart above to classify their organism. Review their picture and decide which organism they have. Justify your answer.
The organisms given here are paramecium, as per their structure.
What is a paramecium?A genus of eukaryotic, unicellular ciliates known as Paramecium is frequently researched as a member of the ciliate group.
In stagnant basins and ponds, paramecia can be found widely in freshwater, brackish, and marine settings.
Typically, cells have an oval, elongate, foot, or cigar form. A rigid but elastic structure known as the pellicle surrounds the cell body.
This is made up of the inner membrane known as the epiplasm, a layer of flattened membrane-bound sacs known as alveoli, and the outside cell membrane (plasma membrane).
Thus, the organism is a paramecium.
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The FBI uses the ________________ DNA fingerprint for its CODIS database. a. mtDNA c. Polymerase Chain Reaction b. y-chromosome d. Short Tandem Repeat
The correct option is D ; Short Tandem Repeat , The FBI uses the Short Tandem Repeat DNA fingerprint for its CODIS database
The DNA profile for Forensic STR DNA analysis comprises of one or two alleles at the 20 CODIS Core Loci.
CODIS allows federal, state, and local crime laboratories to electronically share and compare DNA profiles, therefore correlating crimes and convicted perpetrators.
a DNA database system that comprises DNA profiles of persons provided by state and federal entities. convicted offenders, arrestees, legal prisoners, forensic casework, Bhuman remains, missing individuals, families of missing persons.
CODIS is the FBI's national DNA information repository, which allows state and local crime laboratories to store and compare DNA profiles from crime scenes and convicted criminals.
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Full Question ;
The FBI uses the ________________ DNA fingerprint for its CODIS database.
a. mtDNA
c. Polymerase Chain Reaction
b. y-chromosome
d. Short Tandem Repeat
How does coevolution affect biodiversity?
Answer:
Coevolution plays a key role in shaping the biodiversity on Earth. Coevolution is commonly defined as reciprocal evolutionary changes brought about by interactions between species, implying that interacting species impose selection on each other.
describe the process of urea formation
Urea is formed through a process called urea synthesis, which occurs in the liver. During this process, the liver combines two molecules of ammonia with one molecule of carbon dioxide to form urea. This reaction is catalyzed by the enzyme urea synthase and requires the presence of energy in the form of ATP. The urea synthesis process helps to remove excess nitrogen from the body, as ammonia is a toxic waste product that is produced during the breakdown of proteins. The urea is then excreted from the body through the urine
Urea is synthesized in the body of many organisms as part of the urea cycle, either from the oxidation of amino acids or from ammonia. In this cycle, amino groups donated by ammonia and L-aspartate are converted to urea, while L-ornithine, citrulline, L-argininosuccinate, and L-arginine act as intermediates.
What are the chances of a calico being a boy?
Out of 3,000 calico cats born, only one is male. These cats are so rare that they are often referred to as feline "unicorns."
99.9% of calico cats are feminine. Two X chromosomes are required to produce a three-color (calico) coat, and an XX pair also makes the cat female. The calico fur pattern is mostly white, along with patches of two other colors. Also, since a cat's coat color is linked to her X chromosome in her cells, calico cats rarely become male. Male cells acquire only one X chromosome. That is, men usually have only one color.
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Is it more desirable for a cell to have a small surface area to volume ratio?
A higher surface area to volume ratio is more efficient than a lower ratio. This is due to the amount of plasma membrane relative to the volume of the cell. The more plasma membrane available to transport substances in and out of the cell, the more efficiently the cell performs its particular function.
The high surface-to-volume ratio provides a powerful “driving force” that accelerates thermodynamic processes that minimize free energy.
Increasing the surface area of the cell increases the amount of material that diffuses into the cell. As volume and surface area increase, volume increases more rapidly, so for every doubling of cell volume, the surface area available for uptake is halved.
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What would happen if the active site on the enzyme become damaged?
Answer:
enzyme cannot do its function
Explanation:
at which the substrate cannot enter its site
The DNA of a cell is not programmed to coordinate the activities needed to keep a large cell alive. How does cell division help the cell avoid DNA overload
The process of cell division helps the cell to avoid DNA overload by the following mechanism: Each daughter cell has its own copy of DNA and can coordinate all the activities of a smaller cell.
Thus, the correct option for this question is B.
Cell division may be defined as a process through which a parent cell significantly divides into two daughter cells with an identical amount of genetic material.
DNA overload deals with the mechanism of the larger the cell, the greater the requirement for the positioning of the cell's DNA. In order to prevent this mechanism, a cell undergoes the process of division that limits the phenomena of DNA overloading.
This happens with the help of synthesizing two new daughter cells that limit the size of the parental cell. Therefore, the correct option for this question is B.
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Full Question
The DNA of a cell is not programmed to coordinate the activities needed to keep a large cell alive. How does cell division help the cell avoid DNA overload
A. When a cell divides there is much less DNA
created than in the large cell, increasing the
overload.
B. Each daughter cell has its own copy of DNA
and can coordinate all the activities of a smaller
cell.
C. Cell division does not help cells to avoid DNA
overload.
You and your sibling are trick-or-treating. Realizing
that your bag of Halloween candy is heavier, depends
on your____.
A) subliminal stimuli
B) perceptual set
C) size constancy
D) difference threshold
When playing trick-or-treating and then realizing that the bag of Halloween candy is heavier, it depends on your perceptual set.
Thus, the correct answer is B.
Subliminаl stimulаtion is sensory stimulаtion below а person's аbsolute threshold for conscious perception. Perceptuаl set is the tendency for perceptions to be influenced by one’s expectаtions or preconceptions. Perceptuаl constаncy is the tendency to perceive the size, shаpe, color, аnd brightness of аn object аs remаining the sаme even when the imаge it cаsts on the retinа chаnges. The difference threshold is the smаllest difference in stimulаtion needed to recognize thаt two stimuli аre different from eаch other 50% of the time.
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If a genotype i it heterozygou tate reult in white fur color, what doe it tell u about the white fur trait - i it a dominant trait or receive trait. Explain breifly
If a genotype it heterozygous trait result in white fur color, it tells you that the white fur trait it is a dominant trait.
One copy of an allele, which might come from just one parent, is called a dominant allele and results in a dominant phenotype in individuals. Having two copies of a recessive allele, one from each parent, is necessary for a recessive phenotype to develop. The dominant phenotype of a gene is present in an individual who carries both one dominant and one recessive allele. Generally speaking, they are referred to as "carriers" of the recessive allele because the recessive allele is present but the recessive phenotype is absent.
When estimating a person's likelihood of acquiring particular phenotypes, particularly genetic illnesses, dominant and recessive inheritance are helpful concepts to understand. is a dominant trait.
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1. Wolves were reintroduced into Yellowstone National Park in 1995. In at least 1-2 sentences, predict how you think the wolves changed the rivers in the park.
2. Describe a trophic cascade.
3. How long had Yellowstone National Park been without wolves before they were reintroduced?
4. What happened to the deer population within that time?
5. What is the significant thing those few wolves changed when they were reintroduced?
6. What happened to the vegetation in the park after the wolves were reintroduced?
7. What two specific organisms did the trees coming back directly affect?
8. What did the beaver dams provide?
9. How did the wolves change the rivers?
10. How do the interactions between the wolves and the deer affect the ecosystem
11. Because of their unusually large effecton the ecosystem, wolves can be classified as a...?
Answer:
извините, но мне действительно нужны очки
Explanation:
Can someone help me answer this question please
Answer:
first one is A and the second one is D
Explanation:
HELP!! PLEASE
In mRNA, the protein encoding sequence is found in:
a) Introns
b) Exons
c) Poly A
d) None of these choices
During the splicing process, introns are eliminated, leaving just exons in the final mRNA, which are then employed to control the production of proteins, hence option B is correct.
What are exons?The part of the mRNA that is actually translated into protein is the coding region, often known as the coding sequence or CDS.
The 5' UTR and 3' UTR, untranslated portions of the mRNA, are also present. A procedure known as alternative splicing allows exons to be spliced together in various configurations.
These exons and introns are a part of the earliest messenger RNA products produced during gene transcription. Exons can either be coding or non-coding, depending on whether they include instructions for building a protein.
Therefore, a section of the genome known as an exon is found inside an mRNA molecule, hence option B is correct.
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In which order would you cross all the layers surrounding a bacterial cell if you started on the outside
I would cross all the layers surrounding a bacterial cell if I started on the outside capsule, plasma membrane, and cell wall.
What is the cell envelope?The cell envelope is а descriptive term for the severаl lаyers of mаteriаl thаt envelope or enclose the protoplаsm of the cell. The cell protoplаsm (cytoplаsm) is surrounded by the plаsmа membrаne, а cell wаll аnd а cаpsule.
The cell wаll itself is а lаyered structure in Grаm-negаtive bаcteriа. Аll cells hаve а membrаne, which is the essential аnd definitive chаrаcteristic of а "cell". Аlmost аll procаryotes hаve а cell wаll to prevent dаmаge to the underlying protoplаst. Outside the cell wаll, foremost аs а surfаce structure, mаy be а polysаcchаride cаpsule or glycocаlyx.
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PLEASEEEEEEE HELP GUYS THIS MY FIRST BTOLOGY CLASS!!
The blank words are real, intercept, m, -4 and b in the order.
What is a slope?In mathematics, a line's slope, also known as its gradient, is a numerical representation of the line's steepness and direction
Given:
Slope m = 5
And point (-2, 7)
Slope-intercept form: y = mx + b
Where m is the slope and b is y-intercept.
If a line passes through a point (x₁ ,y₁) and have slope m
then the equation of line is
y - y₁ = m (x - x₁)
We have the equation,
y = -4x + 5
Comparing with the slope-intercept form,
m = -4 and b = 5
Therefore, slope is -4 and b = 5.
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1 Photosynthesis occurs when plants use:
Carbon dioxide
Water
O O OOS
Sunlight
Oxygen
Glucose
Answer:
everything except the oxygen as they excrete oxygen
PLEASE HELP!!!
Two heterozygous black Gina pigs crossed, what’s the percentage an offspring will have black fur?
A. 25 percent
B. 50 percent
C. 75 percent
D. 100 percent
Answer: 100 percent
Explanation: this is because, the color black is more dominant in the offsprings genes(genetics) So if both mom and dad guinea pigs are black that means 100% of them will be.
The food web above represents feeding relationships in a biological community near a deep-sea hydrothermal vent. Hydrothermal vents are geysers on the seafloor that gush super-heated, mineralrich water. The seawater surrounding hydrothermal vents typically contains carbon dioxide (CO2), molecular hydrogen (H2), hydrogen sulfide (H2S), and methane (CH4). Sunlight, however, fails to reach the seafloor where deep-sea hydrothermal vents are located. As part of an investigation, researchers collected living specimens from an area near a deep-sea hydrothermal vent. Mussels in the collection were found to be dependent on molecular hydrogen in seawater. Also, the researchers discovered multiple species of bacteria living in the gills of the mussels.
Mussels use gills for filter-feeding and gas exchange with the surrounding seawater. On the basis of their experimental results, the researchers hypothesized that some bacteria living in the gills of the mussels are capable of chemosynthesis. Which of the following best explains how biological communities near deep-sea hydrothermal vents can exist in a habitat lacking sunlight?
a) Environmental conditions on some distant planets resemble those experienced by organisms
living near hydrothermal vents.
b) Heterotrophs metabolize carbon-containing compounds produced by the photosynthetic
organisms that live on the seafloor.
c) Some organisms rely on energy captured from inorganic compounds to drive basic biological processes.
d) Some organisms that can tolerate high temperatures are single celled, whereas others are multicellular.
Answer: c) Some organisms rely on energy captured from inorganic compounds to drive basic biological processes.
Explanation:
Deep-sea hydrothermal vents are hot spots of geothermal water. The organisms living in deep-sea vents cannot obtain energy from sunlight. They are dependent on chemosynthesis, which involves the utilization of inorganic substances to produce organic substances, which allows their survival and act as a source of energy. In the given situation, bacteria present on the surface of mussels are capable of chemosynthesis also the mussels are dependent upon inorganic hydrogen in seawater. Thus chemosynthesis supports the survival of organisms living in the deep sea vents.
In Model 1, if the length of the arrow represents time, then for those cancerous cells, what happens to the time that is necessary for the cell cycle? What implications might this have for doctors who are treating cancer patients?
In Model 1, if the length of the arrow represents time. then for those cancerous cells, the time necessary for the cell cycle would be reduced.
This could have implications for doctors treating cancer patients, as it could mean that the cancerous cells can divide more quickly, leading to a faster spread of the cancer and more aggressive forms of the disease.
Additionally, it could also mean that treatments such as chemotherapy and radiation may have less of an effect on the cancerous cells, as they may be able to divide faster than the treatments can act on them. Doctors treating cancer patients may need to take this into consideration when developing treatment plans, as they may need to use more aggressive treatments or shorter treatment cycles to ensure that the cancerous cells are effectively targeted.
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Eating food while drinking speeds up alcohol
absorption.
True
False
Explanation:
It is false, because when we drink without eating something it speeds up alcohol absorption
18
Which of the following is an example of natural selection producing
diversity between species?
Answer:
A example of natural selection is when there is an abundance of a certain type of insect just for the purpose of being eaten by another animal. Another example could be when an animal with white fur is more noticeable by predators in the warmer months.
Explanation:
Answer: it would be letter a
Explanation: because the webbed feet and long feet were chosen by natural selection by water habitat and they show diversity by being different:)
This chart presents data on greenhouse gas emissions caused by human activity from 1990 to 2012 .which question would help clarify this evidence
Increased demand for electricity and transportation have led to increased emission of greenhouse gases.
What are green house gases?Green house gases has been defined as those gases that are able to trap and re-radiate infrared radiation back to the earth thereby gradually causing a rise in the temperature of the earth. This phenomenon is known as global warming.
The chart from which the question should be answered is not shown but it must be known that as demand for electricity and transportation increased in the 20th and 21st century, the rate of emission of greenhouse gases increased likewise.
Therefore, Increased demand for electricity and transportation have led to increased emission of greenhouse gases.
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Classify the hypotheses about the dwarf planet Pluto as falsifiable or non-falsifiable.
Pluto's surface is made
mostly of frozen
nitrogen.
Pluto has an unpleasant
climate.
Pluto's orbit is slowing down
due to ida neton
Pluto's landscape is dull and
boring compared to other
dwarf planets in its vicinity.
Falsifiable
Non-Falstable
The following are some hypotheses about the dwarf planet Pluto:
Non-falsifiable
Pluto's climate is unpleasant.In comparison to other dwarf planets in its vicinity, Pluto's landscape is dull and boring.Falsifiable
Pluto's surface is mostly made of frozen nitrogen.Due to tidal friction, Pluto's orbit is slowing.A falsifiable hypothesis is one that can be refuted by tests. The most recent technology. Non-falsifiable hypothesis, on the other hand, cannot be tested. It cannot be refuted because tests have proven it to be true.
Pluto is a dwarf planet in the Kuiper belt, which is a ring of bodies beyond Neptune's orbit. It is the ninth-largest and tenth-massive known object to orbit the Sun directly. It is by far the largest known trans-Neptunian object by volume, but it is slightly less massive than Eris.
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A kingdom of living things that have cells with a nucleus, have cell walls that contain chitin, and are heterotrophs
Fungi are a kingdom of living things which have cells with a nucleus, have cell walls that contain chitin, and are heterotrophs.
Classification of living beings is very important as it allows us to systematically study their characteristics. All the living thing present on the Earth are classified into 5 kingdoms which are the Protista, Monera, Fungi, Plantae and Animalia.
The fungi kingdom includes organisms such as yeasts, mushrooms and molds. Fungi are multicellular and eukaryotic. They have a nucleus. Their cell walls are chitinous which means that they contain chitin. Their mode of nutrition is heterotrophic, that is, they are dependent on other organisms to obtain their food.
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