Answer:
B skates , rays , sharks.
Answer:
B is correct
Explanation:
What does deforestation mean?
to clean up trash and litter
to decrease carrying capacity
to increase nutrient supply
to clear out forests
Answer: To clear out forests.
Explanation: Deforestation is the act of clearing out forests, usually used for making room for buildings of any kind or man-made structures. It's an epidemic in the United States, and we have to take more care about this issue.
is there a difference between water potential and water potential gradient?
Answer:
yes
Explanation:
water potential is energy required, per quantity of water, to transport an infinitesimal quantity of water from sample to a reference pool of pure free water.
water potential gradient is the difference in the water potential of two liquids.
5. The mesosphere is found at 50 to 85 km above Earth’s surface. (5 points)
A. What temperatures would you expect in the mesosphere? (3 points)
In the mesosphere, temperatures generally decrease with increasing altitude and may range from about -90°C (-130°F) to -120°C (-184°F).
What is the mesosphere?The mesosphere is described as the third layer of the atmosphere, directly above the stratosphere and directly below the thermosphere.
The average temperatures in the mesosphere range from roughly -90°C (-130°F) to -120°C (-184°F).
However, temperatures can fluctuate based on location, time of year, and other factors.
The mesosphere is one of the coldest parts of the Earth's atmosphere due to these extraordinarily low temperatures.
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Organic materials and fertilisers enhance soil texture, enabling it to retain water for longer periods of time, and boost microbial and fungi activity.
How would you conduct your investigation? In your answer, explain your independent and dependent variables.
Answer:
To conduct an investigation on the effect of organic materials and fertilizers on soil texture, you can follow these steps:
Define the independent and dependent variables:
Independent variable: type of organic material or fertilizer used (e.g. compost, manure, chemical fertilizer)
Dependent variable: soil texture (e.g. water-holding capacity, porosity, bulk density)
Design the experiment:
Choose a representative soil sample and divide it into several equal portions.
Treat each portion with a different organic material or fertilizer.
Control for extraneous variables by maintaining consistent environmental conditions (e.g. temperature, moisture levels) for each soil sample.
Collect and analyze data:
Measure the dependent variable (soil texture) for each soil sample after a set period of time (e.g. after 2 weeks).
Compare the soil texture of the treated samples to the control (untreated) sample.
Use statistical analysis to determine if any significant differences exist between the treatments and the control.
Draw conclusions:
Based on the results of the data analysis, draw conclusions about the effect of different organic materials and fertilizers on soil texture.
Determine if there are any significant differences in soil texture between the treatments and the control.
To conduct the investigation:
identify the independent and dependent variables: the Independent variable is the type of organic material or fertilizer used while the dependent variable is the soil texture Choose a soil sample and divide it into several equal portions and add organic materials to one portion and none to the other portionCarry out the to determine whether the soil samples that had organic materials and fertilizers retained water more than the soil sample that lacked organic materials and fertilizers.What is an experiment?An experiment is a technique used to confirm or deny a hypothesis, as well as assess the likelihood or effectiveness of something that has never been tried before.
Experiments show the relationship between the independent and dependent variables.
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A 1. Scientists sometimes make discoveries that lead to a need for new laws. What big idea of biology do these situations illustrate?
O biology and society
scientific inquiry
• biological systems
• adaptation and evolation
Scientists sometimes make discoveries that lead to a need for new laws. the big idea of biology do these situations illustrate in biological systems.
A biological system is a group of organs working together to perform a not unusual characteristic. as an example, the muscular gadget is worried about movement, the skeletal gadget gives safety and assistance, and the circulatory system offers nutrients and waste to and from the cells of the body.
Organic structures are the breathing system, digestive system, and circulatory gadget. The human frame includes the subsequent structures: respiration machine – liable for one of the crucial features in any living organism, respiratory, and gas trade.
A biological system is a complex network that connects numerous biologically relevant entities. the organic company spans numerous scales and is decided based on totally special systems.
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1. A brown mink crossed with a silver-blue mink produced all brown offspring. When these F1 were crossed among themselves, they produced forty-seven brown animals and fifteen silver-blue animals. What are the genotypes of the parentals and the F1s
Answer:
The correct answer is -
Parental - BB and bb
F1
Genotypes: 100% Bb
F2
Genotypes: ¼ BB, ½ Bb, ¼ bb
Explanation:
It is given that a cross between a brown and a silver-blue mink produces all brown offspring and it is only possible if brown is dominant over silver blue in true breed cross, assume brown trait is represented by B and silver-blue is b then parents will be
BB and bb
B B
b Bb Bb
b Bb Bb
Cross between F1 individuals: Bb cross Bb
gametes : B, b and B, b
B b
B BB Bb
b Bb bb
the genotype of F2 : 1:2:1 = ¼ BB, ½ Bb, ¼ bb
Why is it incorrect to say plants “breathe” Carbon dioxide (CO
Answer:
Becoz as we know that human being breathe oxygen and through carbon dioxide. Like wise it's opposite to plants. So it's incorrect to say that plant breathe carbondioxide.
As a result of an action potential, AcH is released from the axon terminal and attaches to receptors on the motor end plate. Sodium rushes in the T-tubules and all the steps occur until the muscle contracts in the leg and carry out the command transported by the motor neuron. Which gray horn is the cell body of the motor neuron located? Infer and explain if this is a positive or negative feedback
1) The cell body of the motor neuron is located in the ventral or anterior horn of the grey matter. From there, it extends to the motor unit. 2) Contraction refers to negative feedback in which the body reacts when facing a stimulus.
What is the anatomy of the spinal cord?The spinal cord is mainly composed of grey matter and white matter. The second one covers the first one.
The grey matter transversal section is composed of posterior, lateral, and anterior horns, also known as dorsal, lateral, and ventral horns, respectively.
Each type of horn contains a type of neuron.
In the posterior/dorsal horns, we can find sensory neurons that provide sensory information.In the thoracic area, we can find lateral horns with visceral motor neurons.
In the anterior/ventral horns, we can find motor neurons that extend to the skeletal muscle, which is the motor unit, to produce movement.
The motor neuron from the exposed example is located in the anterior or ventral gray horn.
This example refers to negative feedback because the neurotransmitter release causes a cascade effect that ends in muscle contraction, tending to suppress or counter the original stimuli.
Any change that might occur in the internal functioning will be countered by negative feedback to maintain homeostasis.
Negative feedback needs receptors, central control, and effectors.
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Quagga mussels, an invasive species of mollusk originally from
Russia, have been introduced to the lake after being carried in on
the hulls of boats. An assessment of the size of the quagga
mussel problem is needed, along with suggestions to curb their
population growth.
what field of science is this?
This is a problem in the field of ecology.
The problem of quagga mussels in the lake is an ecological issue that requires scientific assessment and management.
It falls under the discipline of ecology, which studies the relationships between organisms and their environment.
Ecologists investigate the impacts of invasive species on the ecosystem and devise strategies to control their spread and minimize their effects.
In this case, scientists will need to examine the size of the quagga mussel population, their distribution, and their ecological interactions with native species.
They will also need to recommend measures to prevent further introduction of quagga mussels and to manage their population growth, such as using chemical treatments or biological controls.
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do the usage of synthetic plant hormones for the modification of plant growth have any environmental implications
The usage of synthetic plant hormones for the modification of plant growth can have environmental implications.
Understanding the Effect of Synthetic Plant HormonesFactors to consider
1. Ecotoxicity: Synthetic plant hormones, if not properly regulated or used in excessive amounts, can pose risks to non-target organisms and ecosystems. They may affect the growth and development of other plants, beneficial insects, and microorganisms, potentially disrupting ecological balance.
2. Soil and Water Contamination: Improper application or disposal of synthetic plant hormones can lead to soil and water contamination. Runoff from treated fields or improper disposal of unused hormones may introduce these compounds into water bodies, potentially affecting aquatic organisms and overall water quality.
3. Resistance and Persistence: Repeated and excessive use of synthetic plant hormones can contribute to the development of resistance in target plant species. This can lead to the evolution of herbicide-resistant weed populations, requiring higher doses or different chemicals to achieve the desired effect. Moreover, some synthetic hormones may persist in the environment for extended periods, potentially impacting subsequent crops or natural vegetation.
4. Non-target Effects: Synthetic plant hormones may influence the growth and development of unintended plant species, leading to unintended consequences such as changes in biodiversity, alteration of natural plant communities, or interference with the natural ecological succession.
5. Human Health Concerns: The potential impacts of synthetic plant hormones on human health are an area of ongoing research. While these hormones are generally considered safe for use in agriculture when used according to regulations, there may be concerns related to exposure, residues, or indirect effects on food quality and safety.
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Where are the A, B and RH antigens located
Answer: The A, B, and Rh antigens are located on the surface of red blood cells.
Explanation:
One of the following organs is located on the Inferior surface of the liver in the right hypochondriac regions of the nine region plan:
Gall bladder
Pancreas
Left lobe of the liver
Right Lung
Triangle ABC is reflected across line L to form ΔALBLCL, and AAL intersects line L at point D. Which equation is not necessarily true?
A.
m∠ACB = m∠ALCLBL
B.
AD = ALD
C.
m∠BAC = m∠BLALCL
D.
ALD = BLD
Answer:
The equation that is not necessarily true is D. ALD = BLD. This is because the line of reflection (L) does not necessarily bisect the triangle ABC, so the lengths of ALD and BLD may not be equal.
Explanation:
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Patrice is having a tough time developing confidence before she has to speak in front of a group of her colleagues. She asks her friend, Amelia, for help building confidence. What topic should Amelia recommend that Patrice study to BEST help her build confidence before future public speaking occurrences?
Phrasing
Mirroring
Haptics
Power poses
Amelia should recommend that Patrice study "Power poses" (option d) to best help build confidence before future public speaking occurrences.
Amelia should recommend that Patrice study "Power poses" as they are a proven method to boost confidence in public speaking. Power poses involve adopting postures that convey confidence and authority, which can have a positive psychological impact on the individual.
By practicing power poses before a presentation, Patrice can feel more self-assured and in control, leading to a better performance in front of her colleagues.
Although phrasing, mirroring, and haptics can be helpful in certain situations, power poses specifically target confidence-building and are most relevant to Patrice's concerns about her public speaking abilities.
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what is codominance
Answer:
Codominance is a relationship between two versions of a gene.
Explanation:
Explain how different links can show a relation between two species. Describe evidence that shows other correlations and causations between the species.
Different links show relationships between two species. In the scientific world, there are three types of links, including mutualism, parasitism, and commensalism.
Mutualism is a relationship in which both species benefit. Parasitism is where one species benefits, and the other is harmed. Commensalism is a relationship in which one species benefits, and the other is not harmed or helped.One example of a mutualistic relationship is the bee and flower relationship. Bees collect nectar and pollen from flowers for their food, while at the same time, the bee helps in pollination. The bee gets food from the flower, and the flower is pollinated. This is a mutualistic relationship. A parasitic relationship is the relationship between tapeworms and humans. Tapeworms live inside the host and get their food from the host, thereby, causing harm to the host. Evidence that shows correlation and causation between the species includes physical changes in the organism or adaptations to the environment. For example, an animal that feeds on a certain plant may evolve to have a longer tongue to reach the nectar of that plant. In summary, different links show relationships between species, including mutualism, parasitism, and commensalism. The evidence for the correlation and causation between species includes physical changes or adaptations in the organism or environment.For more questions on species
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What determines the shape of the active site?
The shape of the active site in a given enzyme is determined by the amino acid residues of the protein and the interaction between such amino acids and also molecules in the physiological conditions of the surrounding media.
What is the active site in a given enzyme protein?The active site in a given enzyme protein is the molecular domain in the enzyme that binds to the substrate in a chemical reaction in order to form the enzyme-substrate complex that will be converted into products. The shape of the active site in the protein enzyme also depends on the amino acids in the domain that binds to the substrate and also to the molecular interactions.
Therefore, with this data, we can see that the active site in a given enzyme protein is dependent on the amino acids in the protein and their interactions.
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Putting a demand on muscles repeatedly by making them work harder is _________. a) only effective in increasing muscle endurance.
b) effective for increasing muscle tissue when comnined with tripling protein intake.
c) causes overtraining and is an ineffective method for adding more muscle tissue.
d) only effective for increasing muscle strength.
e) the most effective, safe way for athletes to add muscle tissue.
What would the density of a cube of aluminum be that is 2 cm on each side
Answer:
24
Explanation:
if you add them all up and times them by 3
what is biology ? definition of biology
Answer:
The study of living organisms divided into many specialized fields that cover their morphology physiology anatomy behavior origin and distribution
4. The ATP yield from 2 moles of mitochondrial NADH under aerobic conditions in a eukaryotic cell would be: which option is correct a) 1 mole of ATP b) 2 moles of ATP c) 3 moles of ATP d) 4 moles of ATP e) 6 moles of ATP
The ATP yield from 2 moles of mitochondrial NADH under aerobic conditions in a eukaryotic cell is approximately 4 moles of ATP.
During oxidative phosphorylation, each mole of NADH can generate around 2.5 to 3 moles of ATP. Therefore, for 2 moles of NADH, the total ATP production would be in the range of 4 to 6 moles of ATP. While the more precise estimate falls within the 4 to 6 moles range, the closest option provided is 4 moles of ATP. It is important to note that the exact ATP yield can vary depending on factors such as the efficiency of the electron transport chain and the specific conditions within the cell.Since there are 2 moles of mitochondrial NADH, the total ATP yield would be around 4 to 6 moles of ATP. However, the most accurate option among the given choices is 4 moles of ATP.
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How a population changes in size over a certain period of time
Why are two primers necessary for pcr amplification to work?
Answer:Two primers are utilized, one for each of the complementary single strands of DNA released during denaturation. The forward primer attaches to the start codon of the template DNA (the anti-sense strand), while the reverse primer attaches to the stop codon of the complementary strand of DNA (the sense strand).
Explanation:
which scientist developed a method to describe the consistency of the fine grained soils with varying contents?
Answer:
Albert Atterberg (Swedish) scientist
Genes can be turned on or turned off; not all genes are active at one time.
False
True
B
Answer:
False
Explanation:
People have recessive genes that are not expressed phenotypically in one's gene pool, but after birth, genes cannot be 'switched' on or off, nor are particular genes active at certain times.
Brianna is mapping trees in a section of land. She observes that some of the trees are clumped together, some are uniformly separated, and some appear to be spaced randomly. What is she describing?
A. the population density
B. the population distribution
C. the population growth
D. the population outline
In humans, the allele for Huntington's disease is dominant. What genotype would a pure breeding human have?
what is added to or removed from a substance to change its state of matter?
compounds
energy
mass
atoms
what is the common factor needed in both chemical and physical change?
energy
solids
change in composition
change in matter
Answer: 1. Energy
2. energy
Explanation:
both are energy I took the quiz
Energy is added to or removed from a substance to change its state of matter. Energy is the common factor needed in both chemical and physical change. The correct options are B and A.
What is energy?Energy is an entity that is required to do every piece of work. It's of many kinds, and it is required to perform all functions of the body and all physical work. The different kinds of energy are thermal energy, kinetic energy, potential energy, etc.
When thermal energy is removed from an object, it changes its state of matter. The three states of matter are solid, liquid, and gas. When thermal heat increase, it converts into gas, and when decreases it converts into solid. To change any chemical and physical reaction, energy is required.
Thus, the correct options are B, energy, and A. energy.
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The key determinant of viral evolution rate is the (9)______________________________ , which is lower in SARS-CoV-2 and its relatives compared to other RNA viruses like Hepatitis C Virus and HIV. However, SARS-CoV-2 strains have a very high (10)______________________ , suggesting strong positive selection rather than neutral evolution. In addition to point mutations, (11)____________________________ can generate functionally relevant diversity. Further, host-mediated (12)__________________________ can introduce directed mutations. Most mutations will be quickly lost due to chance or (13)______________________________ against deleterious variants. Ultimately, the (14)______________________________ , which measures the accumulation of variation over time rather than simply the generation of new mutations, determines the rate of evolution. Although mutations occurring during the course of infection can generate multiple variants within individual hosts, scientists studying viral evolution at the population level focus on the (15)______________________________ for each host, which consists of the most common variant at each sequence position in the genome. Another source of potentially adaptive variation is (16)_____________________________ , which can occur when an individual host is simultaneously infected with two genetically distinct viral strains.
Word Bank: consensus sequence / dN/dS ratio / genome editing / insertions & deletions / mutation rate / purifying selection / recombination / substitution rate
Recombination, which may happen when a single host is simultaneously infected with two genetically different virus strains, is another source of potentially adaptive diversity.
What is evolution?The process of evolution is how different kinds of creatures evolve over time. It often involves a mix of genetic variety, natural selection, and other elements including mutation, genetic drift, and gene flow. The fundamental tenet of evolution is that populations of organisms accumulate random genetic changes over extended periods of time, which result in the emergence of novel traits and features.
The key determinant of viral evolution rate is the (9) mutation rate, which is lower in SARS-CoV-2 and its relatives compared to other RNA viruses like Hepatitis C Virus and HIV. However, SARS-CoV-2 strains have a very high (10) dN/dS ratio, suggesting strong positive selection rather than neutral evolution. In addition to point mutations, (11) insertions & deletions can generate functionally relevant diversity. Further, host-mediated (12) genome editing can introduce directed mutations. Most mutations will be quickly lost due to chance or (13) purifying selection against deleterious variants. Ultimately, the (14) substitution rate, which measures the accumulation of variation over time rather than simply the generation of new mutations, determines the rate of evolution. Although mutations occurring during the course of infection can generate multiple variants within individual hosts, scientists studying viral evolution at the population level focus on the (15) consensus sequence for each host, which consists of the most common variant at each sequence position in the genome. Another source of potentially adaptive variation is (16) recombination, which can occur when an individual host is simultaneously infected with two genetically distinct viral strains.
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In general, bacterial cells are prokaryotic. Which cells are eukaryotic?
• animal and plant cells
• bacteria cells