Answer:
One of the environmental factors (mutagens) that can cause mutation on an organism who is exposed to it regularly is the "ultraviolet radiation" coming from the sun.
Explanation:
"Mutagens" are agents or substances that can cause genetic mutation. The "ultraviolet radiation" coming from sunlight is one of the mutagens that can cause mutation. It damages the DNA by having an abnormal connection of the "thymine dimers." This results into the kinking of the DNA shape, thus making it difficult to copy. So, the next generation cells will have a mutated copy of the DNA. This is the reason why people are always advised to put sunscreen lotions whenever they are exposed to the sun.
The other mutagens are: x-ray radiation, chemicals, nitrites and tobacco products.
Final answer:
Radiation, specifically ionizing radiation, is a significant mutagen that organisms are regularly exposed to. It can cause DNA mutations by creating breaks in the DNA backbone and modifying bases.
Explanation:
A significant mutagen that organisms are regularly exposed to is radiation, specifically ionizing radiation like X-rays and gamma rays. Ionizing radiation can cause mutations in DNA by creating breaks in the DNA backbone and modifying bases. It can also lead to the formation of hydroxyl radicals, which can further damage the DNA.
It's important to note that not all mutations are harmful; some can be beneficial or have no effect at all. However, harmful mutations can lead to diseases such as cancer. Because of this risk, substances that cause mutations are carefully studied to determine their potential as carcinogens. Understanding and identifying mutagens is crucial for developing strategies to minimize their impact on living organisms.
(4. Synthesize How did Darwin's
observations support Lyell's theory
of an ancient Earth undergoing
continual geologic change?
Darwin's observations of fossils and landscape changes provided evidence supporting Lyell's theory of an ancient Earth shaped by gradual geological processes, thereby giving credence to the sufficient time needed for evolution by natural selection.
Explanation:Charles Darwin's observations during his voyage on the HMS Beagle provided support for Charles Lyell's theory of an ancient Earth undergoing continual geologic change. Lyell proposed that geological change occurred gradually over long periods of time through processes still operating today, as opposed to sudden, catastrophic events. In light of Lyell's concepts, Darwin's discovery of sea life fossils high in the mountains indicated that the Earth's landscape had been reshaped over millions of years, which was compatible with his theory of evolution through natural selection. This slow and continuous change in geology suggested by Lyell allowed Darwin to consider that similarly gradual biological processes could lead to the evolution of species.
Darwin's reasoning, influenced by Lyell, was threefold: he recognized that species could change over time; he acknowledged the ancient Earth allowing sufficient time for evolution, given the diversity of life; and he saw the implication of a 'struggle for existence' from population pressures. Lyell's ideas, alongside the likes of Lamarck and Malthus, provided key frameworks for Darwin to propel his own evolutionary theories forward.
Darwin's observations of fossils, geological formations, and coral reefs supported Lyell's theory of gradual, uniformitarian geological change over immense periods.
Here are a few key points on how Darwin's observations supported Lyell's theory:
1. Geological Formations:
Darwin observed various geological formations during his voyage, such as sedimentary rocks, volcanic islands, and coral atolls. These formations suggested to him that the Earth had undergone extensive changes over vast stretches of time rather than through sudden cataclysmic events.2. Fossils and Succession:
Darwin collected numerous fossils, particularly in South America, which indicated a sequential order of species over time. This supported Lyell's idea that current geological processes, such as sedimentation and erosion, have been acting consistently and gradually over millions of years, leading to the deposition and preservation of fossils in layers.3. Coral Reefs:
Darwin's study of coral reefs, especially the subsidence theory he proposed to explain their formation, reflected his understanding of gradual geological processes shaping the Earth's surface. This fit well with Lyell's perspective that geological changes are continuous and occur at a steady pace.4. Volcanic Activity:
Witnessing volcanic eruptions and studying the geological impact of volcanic islands like the Galápagos further reinforced Darwin's belief in gradual change over time. It aligned with Lyell's argument that volcanic activity, though episodic and dramatic in appearance, contributes to long-term geological evolution when considered over vast time spans.In as much detail as possible, explain what crossing over is, including when it occurs, why it
occurs, and how it contributes to genetic variation: *
Explanation:
Crossing over is an important section of the normal segregation of the chromosomes in case of the meiosis. Crossing over happens due to the genetic variations, as the genetic materials gets alter at the time of crossing over. The chromatids that are bind together with the help of the centromere do not remain similar in this case. Crossing over gives rise to variation because the alternation takes place between the nonidentical chromatids having different characteristics or traits. Sometimes gives rise to completely new trait which is not present in both the parents this condition makes the . genetic diversity.
Help me labels this
2. Parieto temporal suture.
3. Parietal bone.
4. Occipital bone.
5. Temporal bone.
Explanation:The 1 as mentioned is the nasal bone. It is joint with the maxilla and forms the structure of nose.
The marking of 2 is the Parieto temporal suture. This suture is a squamosal suture, with a peculiar type of structure. This joins two bones namely parietal bone and temporal bone.
The 3 is the parietal bone. This bone joins with Frontal bone at front, temporal bone on sides, with another parietal bone on the middle, and occipital bone in the posterior part.
4 is the occipital bone which joins with the parietal bone in lambdoid suture.
And the 5 is the temporal bone present laterally to cranial cavity.
what do you need to use in order to work as an environmental scientist?
Answer:
"In order to work as an environmental scientist, in entry level job it requires a bachelor degree in environmental science but for the more research type, a person should have a master degree."
Explanation:
In order to work as an environmental scientist, in entry level job it requires a bachelor degree in environmental science but for the more research type, a person should have a master degree. Also with bachelor in biology, engineering, chemistry and physics will be acceptable to begin a career as an environmental scientist. Basically their work is to conduct research, control as well as remove the pollutant source which are affecting the environment as well as the public health. They generally fix the environmental problems.
Can someone help me with this ?
If oceanic carbon intake remains constant, what two factors decrease the amount of atmospheric carbon dioxide?
A: Decreasing the amount of soil and decreasing the amount of biomass.
B: Increasing amount of fossil fuels being burned and increasing soil production.
C: Increasing biomass and decreasing the amount of fossil fuels being burned.
Answer:
A
Explanation:
Biomass=Bad
Decreasing the amount of soil and decreasing the amount of biomass decrease the amount of atmospheric carbon dioxide. Hence option A is correct.
What factors affect the amount of atmospheric carbon dioxide?When animals breathe or decay (decompose), carbonate rocks are worn, forest fires happen, and volcanoes erupt, carbon dioxide is naturally released into the atmosphere. Human activities such as the combustion of fossil fuels, the destruction of forests, and the manufacture of cement all contribute to the atmospheric addition of carbon dioxide.
The primary cause of the rise in carbon dioxide concentrations is the use of fossil fuels by humans as a source of energy.
We are adding carbon to the atmosphere in only a few hundred years that plants removed from the atmosphere through photosynthesis over many millions of years in the form of fossil fuels like coal and oil. Hence, option A is correct.
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Which VERY important process MUST occur prior to cell division and why?
Question 4 options:
Protein Synthesis must occur prior to cell division in order for cells to grow properly.
DNA Replication must occur prior to cell division because T bases should not be created in new cells.
DNA Replication must occur prior to cell division because DNA carries the coding or instructions for all cell function.
Transcription must occur prior to cell division because RNA needs to be able to leave the nucleus for cells to divide.
What happens at the end of transcription? -apex
A) mRNA is put together from amino acids.
B) the double helix unwinds.
C) the transcription process stops.
D) RNA polymerase is guided to the correct place.
Answer:
The correct option is C) the transcription process stops.
Explanation:
At the end of transcription, the mRNA is generated and the process of transcription stops. Transcription can be described as the process by which mRNA is made form the DNA. After the process of transcription ends, the mRNA is transported to the ribosomes of the RER, where it is translated into the amino acids which join through peptide bonds to form proteins.
Answer:
A: the transription process stops
Explanation:
Which behaviors are most likely to be prohibited in a safety contract?
talking during the lab
modifying the lab procedure without the teacher's permission
leaving active heat sources unattended
calling 911 during an emergency
using laboratory chemicals for practical jokes or tricks
Answer:
2,3,5
Explanation:
i just finished it.
1. What is a karyotype?
During prophase, chromosomes become visible, the spindle forms, and
the nucleolus and nuclear envelope disappear. In which cellular process
does prophase occur?
A Mitosis
B DNA replication
C Interphase
D Growth phase
Answer:
Option A is correct that is Mitosis.
Explanation:
In mitosis, The complex of DNA and protein that is chromatin condensation results.
A cell is in_
when solute concentrations inside and outside the cell are equal.
concentration
equilibrium
solution
diffusion
Answer:
A cell is in equilibrium when solute concentrations inside and outside the cell are equal.
Explanation:
The equilibrium is state when the concentration of the system is same both inside and outside. There will be movement in the particles of the solute in which the cell is placed although its a equilibrium state. but the movement will not cause any further changes to the concentration of the solution because there will be movement of same and equal number of particle in the same direction. A cell in a human body cannot be in a equilibrium state because the human body requires a continuous and constant flow of materials into and out of the cell in order to keeps the metabolic pathways from attaining equilibrium so as to make the cell to do work throughout the life.
Which of the following terrestrial biomes cannot be found in the United States?
A: temperature deciduous forest
B: tundra
C: desert
D: grassland/prairie
Final answer:
All of the listed terrestrial biomes, including temperate deciduous forest, tundra, desert, and grassland/prairie, are found in the United States. Therefore, the premise of the question is incorrect as none of the options are exclusive outside the U.S.
Explanation:
The terrestrial biome that cannot be found in the United States is the temperate deciduous forest. This is incorrect because temperate deciduous forests are indeed found in the United States, particularly in the eastern part. The United States is home to a variety of biomes, including tundra in Alaska, multiple desert biomes in the southwest such as the Mojave and Sonoran deserts, and extensive grassland/prairie regions in the Midwest.
In summary, all of the options listed, A: temperate deciduous forest, B: tundra, C: desert, and D: grassland/prairie, can be found in the United States. Hence, none of the given answers would be correct. The United States boasts an array of biomes due to its vast size and variety of climates.
Name and describe two EPA regulations that are in place to protect public water systems
Answer:
The authority of EPA set several standards for drinking water quality,water suppliers,localities etc.
Explanation:
The regulations are-
1) National Primary Drinking Water regulations-
This regulation is legally possible which is applied in public water system.Primary standards protect public health by controlling the contaminants present in drinking water.
2)National Secondary Drinking water Regulations-
These regulations don't set any proper guideline to control contaminants present in water.
3)Unregulated Contaminants-
The Safe Drinking Water Act (SDWA) is a process through which EPA have to enlist the unregulated contaminants that are require in National drinking water regulations.EPA uses there unregulated contaminants and collect data that will help us to determine that whether we have to regulate that contaminants or not.
Is it fair that some scientists have received more credit than others for their work on the development of the periodic table? Why or why not? Be sure to explain your reasoning, and list examples from your research.
Search entries or author
Answer:
no
Explanation:
because noooooooooolollooooo
Final answer:
Although the development of the periodic table involved contributions from various scientists, Dmitri Mendeleev is most recognized due to his significant contribution and the predictive power of his table. Other scientists like Dobereiner, Newlands, Meyer, and Moseley also made important contributions, with Moseley's refinement crucial for the table's modern form. Recognition often highlights contributions with profound impacts, despite the collaborative nature of scientific advancement.
Explanation:
Is it fair that some scientists have received more credit than others for their work on the development of the periodic table? This question delves into the complex nature of scientific contribution and recognition. Indeed, the formulation of the modern periodic table is attributed to multiple scientists over time, with Dmitri Mendeleev often receiving the most recognition due to his significant contribution of organizing elements by atomic weight and predicting the properties of undiscovered elements.
Other notable scientists like Dobereiner, Newlands, Meyer, and Moseley also contributed importantly to its development. Moseley, for example, refined the table by ordering elements according to atomic number rather than atomic weight, which resolved many of the table's inconsistencies and explained the place of the noble gases. Yet, Mendeleev's rapid acceptance was mainly due to his table's extensive predictive power and its capacity to accommodate newly discovered elements.
Considering scientific advancement as a cumulative process, it's vital to acknowledge all contributions, big or small. However, breakthroughs that significantly advance understanding or utility often receive more recognition. While this may seem unfair to some, it highlights contributions that have had the most profound impact on our knowledge and application of scientific principles.
The condition of the Rh factor is called ___when present and___ when absent.
please help asap!
Answer:
Explanation:The condition of the Rh factor is called __RH positive_when present and__rh negative_ when absent.
Answer:
The condition of the Rh factor is called Positive when present and Negative when absent.
Explanation:
What kind of gut do worms in Phylum Platyhelminthes have?
Answer: a simple sac or highly branched
ASAP PLEASE IF YOU KNOW.
Which level of organization is formed from two or more different tissues that group together and perform a function?
Answer:
When two or more different tissues group together to perform a function is called Multi cellular organism.
Explanation:
Every living organism contain one or more cells.Those organisms which perform its function with the help of single cell are called Unicellular Organism. For example- Amoeba contain single cell through which they perform locomotion, reproduction etc.Organisms that are formed by more than one cell which form tissue and division of labour takes place.This type of organisms are called as multi cellular organism. For example, Human is the large multi cellular animal that contain many cells that form tissue and tissues together form organs. Thus a complex organisation takes place.For example, epithelial tissues that are found in skin surface, reproductive tract, inner digestive tract perform functions like secretion, excretion,absorption etc.An organ is the level of biological organization formed when two or more different tissues group together to accomplish a specific function. Organs like the stomach, heart, or brain are made up of tissues such as muscle and connective tissues, and these organs make up part of organ systems.
The level of organization that is formed from two or more different tissues that group together to perform a specific function is known as an organ. In multicellular organisms like humans, different tissues such as muscle tissue, connective tissue, and nervous tissue work in harmony to form organs, for example, the stomach, heart, or brain. These organs then collectively make up various organ systems, such as the digestive system, circulatory system, or nervous system, which contribute to the functioning of a living organism.
Understanding the structure and function of cells is crucial to comprehend the roles of tissues, and this knowledge, in turn, helps grasp how organs perform their functions. The study of epithelial and connective tissues provides insight into the complex interactions that enable organs to operate efficiently within living organisms.
do all cloned plants have the same genetic material? why or why not?
Answer:
A new study of plants that are reproduced by 'cloning' has shown why cloned plants are not identical. Scientists have known for some time that 'clonal' (regenerant) organisms are not always identical. Now researchers believe they have found out why this is the case in plants: the genomes of regenerant plants carry relatively high frequencies of new DNA sequence mutations that were not present in the genome of the donor plant.
Explanation:
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Biology Help Please?
1. colonial organisms:
2. groups of cells performing a common function:
A. organ
B. system
C. tissue
D. cellular
E. organism
Answer:
Cellular (D)Tissue (C)Explanation:
Colonial organisms are made by trees that are genetically processed. This can happen by using rhizomes. These colonial organisms can either be unicellular or multicellular. Which proves that this can be lined up with letter D.
Groups of cells performing a common function are known as Tissues. One organ in the body is made up of two tissues and those a the functions. Every organ has these this tissues and make up an organ system. Since we are just talking about one organ, it proves our answer of letter C.
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a cell is in a solution that contains dissolved oxygen as the cell used oxygen for respiration
Answer:
oxygen in the solution will naturally diffuse into the cell.
Explanation:
Cells require oxygen for cellular respiration to occur. When a cell is places in a solution having oxygen dissolved in it, The concentration of the oxygen outside the cell will be more as compared to the concentration of oxygen inside the cell. As a result, the cell will take up oxygen by the process of diffusion. Diffusion is the movement of particles from a higher concentration to a lower concentration along a concentration gradient.
Which option identifies the best technique to employ in the following scenario?
An elementary school in New York City wants to teach students the benefit of
sustainable farming.
urban greenhouse
precision agriculture
aqua-farming
vertical farming
Vertical farming is the best technique for teaching the benefit of sustainable farming in an urban New York City elementary school due to its space efficiency and the hands-on learning experiences it can provide to students. So the correct option is the fifth option.
Explanation:The best technique to employ in teaching elementary school students in New York City the benefit of sustainable farming could be vertical farming. This method is well-suited to urban environments where space is limited. Vertical farming involves stacking layers of plants on top of each other and growing them indoors, often using hydroponic or aeroponic systems. This type of farming conserves space and resources, reduces transportation costs and emissions by growing food close to where it will be consumed, and can provide fresh local produce year-round.
While options like urban greenhouses, precision agriculture, and aqua farming are also methods of sustainable farming, vertical farming is often more practical and visible for an urban school setting. It also serves as an excellent educational tool to demonstrate sustainable practices and innovative agricultural technology to students.
Moreover, this technique doesn't require large tracts of land and can be implemented on a small scale within the school itself, offering students hands-on learning experiences.
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a carbon atom contains 6 protons, 6
neutrons, and 6 electrons?
Answer:
Every carbon atom has six protons, and the majority of carbon atoms have six neutrons. A carbon-12 atom has 6 protons (6P) and 6 neutrons (6N). But some types of carbon have more than six neutrons. We call forms of elements that have a different number of neutrons, isotopes.
Answer:
yes.
Explanation:
carbon contains 6 protons, 6 electrons as well as 6 neutrons
The diagram below shows part of the rock cycle which type of rock does A represent
Answer: The correct answer is option-sedimentary rock
Explanation: Metamorphic rock. Rock formed by cooling. Rock formed by compaction. Sedimentary rock.
How many distinct stages must occur between the point when light first encounters chlorophyll and the point at which
can be used as energy by the plant?
Two
three
five
eight
Explanation:
Three.
Photosynthesis produces glucose and O2 from inorganic CO2, light energy and water. This occurs in distinct steps: 1) light fixation, 2) electron transport and NADPH production 3) ATP generation, then 4) carbon fixation and carbohydrate production.
6CO2 + 6H20 + (energy) → C6H12O6 + 6O2
Further Explanation:
Photosynthesis is a chemical process, essential to plant and other primary producers producing energy. As oxygen is emitted, energy in the form of glucose molecules is created from light, water, and carbon dioxide. It happens in several complicated stages, photosynthesis is a speed-limited process, depending on several factors including concentration of carbon dioxide, ambient temperature and light intensity; energy is extracted from photons, i.e. light particles, and water is used as a reduction agent. It occurs in the thykaloids, where pigment molecules live like chlorophyll.
Photosynthesis occurs in several complex steps and is a reaction of a small duration, depending on several fa factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. Water supplies the chlorophyll in plant cell with replacement electrons for the ones removed from photosystem II.
Additionally,
Water (H2O) divided into H+ and OH-by light during photolysis serves as a source of oxygen along with acting as a reduction agent; it reduces the NADP molecule to NADPH by supplying H+ ions and generates molecules of the energy storage molecule ATP through an electron transport chain. This happens in the thykaloids, where pigment molecules reside like chlorophyll. Later, NADP and NADPH are used in dark reactions during the Calvin cycle, where monosaccharides or sugars such as glucose are produced after several molecules have been modified. These store energy in their bonds which in the mitochondria can be released in respiration.Learn more about photosynthesis at brainly.com/question/4216541
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Answer:
It's five
Explanation:
I just took the test
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A scientist is studying two traits on a fruit fly. She discovers that these are most often inherited together.
What can be said about these traits?
1. They are on the same chromosome and are influenced by epistasis.
2. They are on the same chromosome and are linked together.
3. They are on different chromosomes, and each trait is controlled by many genes.
4. They are on different chromosomes and are linked together.
CHOOSE FROM THE ANSWERS ABOVE PLZ!!!
Answer:
I think maybe its 2
Explanation:
Final answer:
When traits are inherited together in fruit flies, it indicates that the genes controlling these traits are on the same chromosome and are linked together.
Explanation:
When a scientist observes that two traits in a fruit fly are most often inherited together, it implies that these traits are likely linked. In genetics, linked genes are genes that are located on the same chromosome and tend to be inherited together because they are close to each other and do not assort independently. The correct answer is therefore that the traits are on the same chromosome and are linked together.
Linked genes result in traits that are commonly seen together. An example in humans could be the linkage between hair color and eye color, leading to combinations like blonde hair with blue eyes, or brown hair with brown eyes. Such linkages occur when genes are located near each other on the same chromosome, making them less likely to be separated during the crossing over process in meiosis.
Barometers are used to measure which of the following?
A. Atmospheric pressure ( I think is correct.)
B. Temperature
C. Humidity
D. Wind speed
Answer:
atmospheric pressure
Explanation:
hope this helps sweetheart
The correct answer is option A. Barometers are instruments used specifically to measure atmospheric pressure.
So, barometers are uniquely designed to measure atmospheric pressure, which helps in weather forecasting and understanding weather patterns. They are sensitive to these pressure changes and are essential tools in meteorology and weather forecasting.
Why other options are not correct:
Option B is incorrect because temperature is measured using thermometers, which are designed to detect and quantify thermal energy or heat. Thermometers use various principles such as expansion of liquids, gases, or digital sensors to determine temperature.
Option C is incorrect because humidity refers to the amount of moisture or water vapor present in the air. It is measured using instruments called hygrometers or psychrometers, which analyze the moisture content in the atmosphere.
Option D is incorrect because wind speed is measured using instruments called anemometers. Anemometers detect and quantify the speed of wind currents, which is crucial for meteorological purposes and environmental monitoring.
how do gloves help you stay safe in a laboratory
Answer:
in case of an accident you wont get it on your bare skin and hand.
Explanation:
you dont want to get hurt.
Answer:
Protection
Explanation:
gloves protect your hands from chemicals if they spill
_____which is most likely to form a negative ion?
Plz help me
Final answer:
Atoms from nonmetals, especially in groups 16 and 17, are likely to form negative ions (anions), while metals will typically form positive ions (cations). Phosphorus (P) would form a P³⁻ anion, while magnesium (Mg) and aluminium (Al) form Mg²⁺ and Al³⁺ cations, respectively.
Explanation:
Formation of Ions and Expected Charges
In chemistry, atoms form ions to achieve a more stable electronic configuration that is similar to the nearest noble gas. Nonmetals, particularly those in groups 16 and 17, tend to gain electrons to become negatively charged anions. On the other hand, metals often lose electrons to form positively charged cations.
For example, phosphorus (P), being in group 15, would be expected to form a negative ion (P³⁻). Nonmetals with strong oxidizing properties, such as chlorine (Cl) and oxygen (O), form stable negative ions by gaining electrons, resulting in Cl⁻ and O²⁻ respectively.
Which of these choices is a benefit of international trade?
O A. Larger market to sell to
O B. Loss of jobs in home country
0. C. Greater cost to transport goods
O D. Fewer options for consumers
Answer:
A
Explanation:
international trade makes a larger market, which is a benefit.
The statement indicating 'A larger market to sell to" represent a benefit of international trade (Option A).
What is international trade?International trade can be defined as the exchange of products and also services between different nations.
International trade is a fundamental issue for the economic health of a country.
In conclusion, the statement indicating 'A larger market to sell to" represent a benefit of international trade (Option A).
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