Answer:
Complete dominance Result from successive mutations of the same GENE.
Explanation:
Answer:
Multiple Alleles result from successive mutations of the same gene.
Explanation:
Multiple alleles or polyalelia is the situation where a gene (genotype) presents three or more alleles, not just two, for the same chromosomal locus (gene address), determining a characteristic (phenotype).
Multiple alleles are the result of successive mutations in the genes of a given locus. Each mutant gene that emerges establishes a condition for the appearance of yet another new phenotypic expression of that particular character in that species.
Which of the following controls the activities of a cell? A. nucleus B. vacuole C. cytoplasm D. cell membrane
A. Nucleus controls the activities of a cell.
As the main command center where genetic material, or DNA, is kept, the nucleus regulates the functions of a cell. The instructions needed to synthesize proteins and control biological functions are encoded in DNA. The nucleus regulates the expression of genes, which affects growth, metabolism, and division, among other cellular processes.
Through the transcription and translation of genetic information into proteins, which perform the required functions within the cell, it synchronizes these actions. Therefore, the nucleus is essential to preserving the integrity and general function of the cell.
2 examples of precise, measurable evidence of how human activities are having a profound influence on the global climate in terms of greenhouse emissions and climate change
Answer:
The presence of smog in the atmosphere and exploitation and burning of coal
Explanation:
The "smog" can be observed as dark low clouds in the cities. These are formed by accumulation of gases such as: CO2, soot, smoke and dust in suspension. If the atmospheric concentration of the main gases responsible for the greenhouse effect that was maintained in 2016 is maintained, the average temperature of the Earth will have risen 1, 3 ° C in 2020 and 3 ° C in 2070.
In the process of using coal, important environmental damage occurs because when burning it releases large amounts of greenhouse gases.
The damage caused by coal combustion is much greater when poor quality fuel is used, because the impurities it contains are converted into sulfur oxides and other toxic gases.
In the production of electricity, about 5 tons per year are used, causing havoc in terms of pollution
Human activities, specifically the burning of fossil fuels, have led to increased greenhouse gas emissions, which are measured using ice cores and documented emission statistics, showing a profound influence on global climate change.
Two precise and measurable examples of human activities influencing global climate change due to greenhouse gas emissions are:
The use of ice cores as a method for tracking historical carbon dioxide levels over the past 800,000 years. Ice cores have revealed an unprecedented rise in CO₂ levels concurrent with the industrial era, indicating a direct link to human activity.The documented rise in greenhouse gas emissions from burning fossil fuels for transportation and energy generation, specifically noting an increase of CO₂ emissions in industrialized countries which have led to various climate impacts such as increased average temperatures and changes in precipitation patterns.These examples demonstrate the large-scale impact of human behavior on the climate and underscore the necessity for reducing emissions to mitigate climate change.
The allele for nontasters is recessive. In which population is the frequency of the recessive allele highest
Is there more information
Mutations _____.
A) cannot be caused by the environment
B) are the main sources of microevolution
C) can be discovered through genetic testing
D) are always harmful to an organism
Answer:
Mutations _____.
A) cannot be caused by the environment
B) are the main sources of microevolution
C) can be discovered through genetic testing
D) are always harmful to an organism
Explanation:
Gene or molecular mutations:
They are the mutations that alter the nucleotide sequence of DNA.
The answer is: C) can be discovered through genetic testing.
if birds eat insects that feed on corn, which pyramid level would birds occupy?
Answer:
A.
Explanation:
If there are no decompsers, then B. D is mostly likely decompsers. C is most likely the plants. B, is the insect, also the primary consumer. A, should be the bird, if the decompser is included.
The birds feed on insects, thus, they will occupy the B level of the pyramid. D would represent corn and C would represent the insects that feed on corn. The A-level will be represented by a predator which feeds on birds.
What is pyramid in ecology?
An ecological pyramid is defined as the graphical representation of the relationship between the different living organisms at different trophic levels.
A lot of times, humans finished up in A level because people are the primary consumers of various animals and even vegetables.
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How do gymnosperms look different than angiosperms
The key difference between angiosperms and gymnosperms is how their seeds are developed. The seeds of angiosperms develop in the ovaries of flowers and are surrounded by a protective fruit. ... Gymnosperms seeds are usually formed in unisexual cones, known as strobili, and the plants lack fruits and flowers
Explain how the abiotic components in each area determined what type of plants and animals lived there.
Answer:
Abiotic components of an ecosystem are water, air, light, soil, and temperature.
Now think about how the availability of these things will affect what could live in a specific area.
Consider a desert ecosystem. Deserts are arid, receiving little rain (water) and have extreme temperatures (both cold and hot). Because of these conditions only certain plants and animals can live here. These plants and animals have adaptations that are specific to the environment. If you were to put an organism that does not belong in there, they would most likely die out.
Tidbit for you. The Atacama desert is one of the driest places in the world, located specifically in Chile. At one point, this place did not receive any rain for 500 years! Still plants and animals are able to live in this area. When it finally did rain, the sudden downpour caused a radical change in this ecosystem. You would think at first rain would be good, but no. Because the changes the rain brought was too drastic, it caused a devastating effect on the organisms that lived there because they were not adapted to rain.
A region in China has steppes with very few trees. It receives a little more rain than arid desert climates receive. This region
also has contrasting seasons with cold and hot temperatures. It is home to many grazing animals, such as deer.
Which factors define this area as a semiarid climate? Check all that apply.
a)receives little rain
b)is located in China
c)has steppes with few trees
d)has grazing animals, such as deer
e)has hot and cold temperatures
Answer:
I would say A
Answer:
A. receives little rain, has steppes with few trees, has hot and cold temperatures
Explanation:
I did the quiz and got it right it is also on quizlet.
under what conditions will a substance be likely to enter a cell through diffusion
Answer:
Under hypotonic conditions.
Explanation:
If the extracellular fluid has lower osmolarity than the fluid inside the cell, it’s said to be hypotonic—hypo means less than—to the cell, and the net flow of water will be into the cell.
A substance can enter a cell through diffusion if there is a concentration gradient, the substance can pass through the cell membrane, and if necessary, specific protein channels are available in the cell membrane. Diffusion is a passive form of transport that does not require energy from the cell. External conditions like solvent density and system temperature can also affect the rate of diffusion.
Explanation:
A substance is likely to enter a cell through diffusion under certain conditions, including the existence of a concentration gradient, the ability of the substance to pass through the cell membrane, and the presence of specific protein channels in the membrane. Diffusion moves a substance from an area of higher concentration to an area of lower concentration until the concentration is equal across the space. This is a form of passive transport, meaning it doesn't require any energy from the cell.
For example, in an organism, gases, lipids, and water pass through the cell membrane easily, often using protein channels known as aquaporins for water. But polar molecules like glucose, amino acids, and ions may not easily pass through. These molecules often rely on facilitated transport, moving down a concentration gradient through set protein channels in the membrane, which does not require energy.
Other factors can also affect the rate of diffusion, including solvent density and system temperature. A denser medium or lower temperatures can slow the rate of diffusion, while a less dense medium or higher temperatures speed it up. So, the conditions in which the cell exists also play an integral role in whether a substance can enter a cell through diffusion.
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Why are architects and engineers concerned about surface waves
Answer:
Because they are the most destruction waves
Explanation:
Surface waves travel just below the earth’s surface. Examples of surface waves are Rayleighs and Long waves. Rayleighs cause ripples on the ground while long waves move the ground horizontally perpendicular to the direction of travel of the wave. Therefore, these waves are capable of destroying the foundations of structures and hence causing their collapse. Studying these waves allow these professionals to design foundations strong enough to withstand these waves.
Architects and engineers focus on surface waves due to their resonating effects that can cause building collapse during earthquakes, with the risk heightened by factors such as building height and roof design.
Explanation:Architects and engineers are highly concerned about surface waves because these waves carry significant energy which can resonate with structures, leading to potential collapse during events like earthquakes. Resonance occurs when the driving frequency of surface waves matches the natural frequency of a building, leading to a large increase in vibration and possibly causing the structure to fail, especially if the building's height matches the condition for establishing a standing wave.
Furthermore, because surface waves can also experience constructive interference due to reflections off denser subsurface materials, the resulting amplification of wave energy at certain points can lead to disproportionate damage, sometimes further away from the earthquake's epicenter. Additionally, large surface areas of roofs, like those of gyms or supermarkets, are susceptible to collapse as they may resonate at the frequencies of the earthquakes. Therefore, understanding wave mechanics is crucial in designing buildings that can withstand the destructive power of surface waves.
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PLEASE ANSWER QUICK
Which of the following is a principle of natural selection
Most organisms are infertile or produce nonviable offspring.
Members of a species are genetically identical.
Variations are acquired during an individual's lifetime and so are not passed to offspring.
Helpful variations allow individuals to survive and reproduce better than members who lack these variations.
Answer:
Helpful variations allow individuals to survive and reproduce better than members who lack these variations.
The answer: would be the last one, which means survival of the fittest
Please help ASP! Look at the picture above!
Answer:
A
Explanation:
It kinda tells you in the question by talking about salt in water.
A saltwater fish controls the concentration of salt in its body by actively excreting salt across its gills, drinking, and producing very small amounts of concentrated urine. Hence the correct option is b.
A saltwater fish is classified as an osmoregulator because it actively regulates the concentration of salt in its body to maintain internal balance in a saltwater environment. The fish achieves this by excreting excess salt through specialized cells in its gills, actively drinking water to compensate for osmotic water loss, and producing minimal, highly concentrated urine to conserve water.
In a saltwater environment, where the external concentration of salts is higher than that inside the fish's body, it faces the challenge of preventing dehydration due to water loss and maintaining a suitable internal salt balance. The osmoregulatory mechanisms employed by saltwater fish are crucial for their survival and adaptation to their specific aquatic habitats. Hence the correct option is b.
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why would carbon 14 not be useful for dating something in the precambrian era?
Answer:
Not good for such old age
Explanation:
Carbon 14's half-life is about 5,700 years. So, it cannot be used to date something more recent than that. Also, due to the decay, it cannot be used on items older than about 50,000 years.
Then youngest a sample from the precambrian era could be is about 541,000,000 years (541 millions), so it's WAY past the range of use of Carbon 14, since there wouldn't be any carbon 14 left in the sample to evaluate the age through C14's half-life cycle.
Cells use cellular respiration to get energy from food. In this process, oxygen is used to release the energy stored in food. This energy is then stored in a certain molecule. What is the name of this molecule?
Answer:
Respiration
Hope This Helps! Have A Nice Day!!
Answer:
It's ATP
Explanation:
ATP is a protein that stores energy, so it makes sense
In an eight–cell embryo of an organism, the cells of the upper tier are aligned directly over the cells of the lower tier. Which organism is it likely to be?
Scientists believe ___ were the first types of cells able to make their own food.
a. cyanobacteria
b. chemoautotrophs
c. photoautotrophs
B. Chemoautotrophs is the answer
Answer: a. cyanobacteria
Explanation:
Cynobacteria is considered to be the first organism on earth which was capable of producing it's own food by the process of photosynthesis. The cynobacterial strain used to exists on earth around 3.5 billion years ago. These were the first unicellular prokaryotic organisms. They had a large number of colonies. These were responsible for the liberation of large amount of oxygen in the oxygen deficient primitive earth atmosphere.
How does information flow from DNA in the cell nucleus to direct the synthesis of proteins in the cytoplasm?
in short, it goes from DNA in the nucleus, to mRNA which can go out the nucleus to the ribosomes, where protien synthesis takes place.
Final answer:
The flow of information from DNA to protein synthesis involves two critical processes: transcription in the nucleus and translation in the cytoplasm, as dictated by the Central Dogma of molecular biology.
Explanation:
The information flow from DNA to direct protein synthesis in the cytoplasm is a fundamental concept in biology known as the Central Dogma. This process starts with transcription, where the information stored in a gene's DNA is copied into messenger RNA (mRNA). This occurs inside the cell nucleus. The mRNA then travels out of the nucleus into the cytoplasm, where it directs the synthesis of proteins through a process called translation. During translation, ribosomes read the sequence of the mRNA to assemble the appropriate amino acids into a polypeptide chain, which then folds into a functional protein.
Review questions on this topic might ask for the correct sequence of information flow (a. DNA to mRNA to protein) or might pose hypothetical situations involving genetic material to test understanding of the concept.
An influx of some pollutants, such as fertilizers and pesticides, into bodies of water can lead to artificial __________.
A. Fertilization
B. Selection
C. Population decline
D. Eutrophication
D) Eutrophication (I think it’s the right answer but don’t trust me)
which of the following statements about scientific theories are true? (A) theories cannot be tested (B) theories are the same as hypotheses. (C) theories can be used to predict the existence of as yet unobserved things or phenomena. (D) theories are ethical principles based on a religious foundation
C. im pretty sure thats what it is, the other answers sound weird and definitely wrong in my opinion
once equilibrium is reached in which direction will molecules in a liquid state move across the membrane
Answer:to the point where there is less space
Explanation:
Answer: Both directions
Explanation:
Which is an example of a local wind? a windchill a jet stream a trade wind a sea breeze
A sea breeze is an example of a local wind.
What is sea breeze?A sea breeze is a local wind that occurs near coastal regions where there is a significant temperature difference between the land and the sea.
During the day, the land heats up faster than the sea, causing the air above the land to rise and the air above the sea to move towards the land. This movement of air from the sea to the land is known as a sea breeze.
Sea breezes usually occur during the daytime when the sun heats up the land, and the temperature over the land rises faster than the temperature over the sea. In contrast, at night, the land cools down faster than the sea, and the air above the sea moves towards the land, creating a land breeze.
Sea breezes are essential for coastal ecosystems and climates, as they help regulate temperatures and provide a source of moisture for vegetation. They can also affect human activities such as fishing, sailing, and coastal tourism.
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A sea breeze is an example of a local wind, distinguished for being a wind pattern that affects a limited area and arises from temperature and pressure differences between land and sea.
An example of a local wind is a sea breeze. Local winds like this are caused by the differential heating and cooling of land and water surfaces, leading to pressure differences and the resulting movement of air. The sea breeze is a local wind that blows from the sea towards the land during the night, when the air over the water is warmer than the air over land. This is in contrast with global winds such as the jet stream or trade winds, which cover much larger areas and are influenced by the Earth's rotation and the overall heating of the Earth's surface.
What is the purpose of using multiple control groups in an experiment
Answer:
The independent variable is "controlled" or held constant in the control group. A single experiment may include multiple experimental groups, which may all be compared against the control group. The purpose of having a control is to rule out other factors which may influence the results of an experiment.
Explanation:
Answer:
Explanation:
A control group is a standard group which is used for the purpose of the experiment. It does not receive any manual treatment by the experimenter. Instead it is kept as a standard for comparison of the other variables.
The multiple control groups are used in the experiment so as to increase the accuracy, consistency and reliability of the results. As if one control group contains contaminants it may produce errors in the experiment. To avoid error and enhance error and increase accuracy multiple control groups are used.
explain how the information from the stimuli is communicated to the brain.
Answer:
Explanation: Sensory receptor interact with stimuli, such as light sound temperature and pain which is transformed into the code that is carried to the brain by the chain of neurons. Once the signal reaches he end of an axon, which is at the end of neuron, a neurotransmitter is released and the process repeats.
Information from stimuli is communicated to the brain through sensory neurons which convert environmental stimuli into electrical signals. These signals are then processed in the brain by integrating current sensory data with emotions, memories, and responses are generated accordingly.
Explanation:How Information from Stimuli is Communicated to the Brain
The process through which information from stimuli is communicated to the brain begins with sensory neurons located in various sense organs. These neurons receive environmental stimuli and convert them into electrical signals. For example, sensory neurons in the eyes detect light, while those in the skin sense touch. These signals are then carried to the central nervous system, specifically the brain, for integration.
The brain takes these signals and filters them through emotions and memories, processing the information to produce thoughts and responses. Each sense organ is associated with a certain area of the brain responsible for interpreting its signals. For instance, the temporal lobe interprets olfactory information from the nose. This processing of information not only relies on current stimuli but also on previous experiences, emotional state, and other environmental factors.
After processing, the brain generates a suitable response depending on the given situation. For example, the brain might initiate a movement in response to visual stimuli, like catching a ball, or a sensation of hunger when smelling freshly baked cookies. All these processes illustrate the complexity and efficiency of the human nervous system and its capability of handling endless streams of information.
What is one difference between the sternum and the femur
One difference between the sternum and the femur is that the sternum is a flat bone located in the chest, while the femur is a long bone located in the thigh.
What are differences between sternum and femur?The sternum, also known as the breastbone, is a long, flat bone located in the center of the chest. It is connected to the ribs and helps to protect the heart and lungs. The femur, on the other hand, is the largest and strongest bone in the body. It is located in the thigh and connects the hip to the knee. The femur is responsible for bearing the weight of the body and is crucial for movement and mobility.
Another difference is that the sternum is a flat bone and the femur is a long bone. Flat bones are typically thin and relatively flat and are found in the skull, sternum, and scapulae. Long bones are longer than they are wide and have a hollow shaft in the middle, which is filled with bone marrow. They are found in the legs, arms, and fingers.
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In past decades, the Grizzly Bears in Yellowstone National Park were hunted nearly to extinction. Some people just wanted a trophy to brag about, while others were trying to protect their livestock from the large carnivore. What is the most effective way to protect wildlife whose population numbers are becoming concerningly low?
Answer:
The first answer is most logical, since it is possible.
Explanation:
Which mutation is harmful to the organism? A. a mutation allowing moths to camouflage better on blackened tree bark B. a mutation making Staphylococcus aureus resistant to the antibiotic methicillin C. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell D. a mutation causing uncontrolled cell division E. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them
Answer:
D. a mutation causing uncontrolled cell division
Explanation:
A mutation that causes uncontrolled cell division leads to cancerous growths.
This means that an organism with this mutation shall have cancer.
Cancer is a disease caused by the abnormal multiplication of cells in an organism.
This mutation is harmful since it leads to the organism becoming sick and eventually dying.
Answer:
D.) a mutation causing uncontrolled cell division
Explanation:
PLATO
When you are sick, your lymph nodes swell with extra erythrocytes. True False
outline the course of digestion of the following foods in the mouth, stomach and small intestine of the human digestive system.
a. Carbohydrates
b. Proteins
c. Fats
Answer:
Absorption of food into the body takes place through a few steps:
1- Food is chewed in the mouth and broken down into smaller pieces with teeth.
2- In the mouth, an enzyme amylase secreted by salivary glands converts carbohydrates into small units such as starch.
3- When food is passed on to the stomach its consists of fats and proteins.
4- In the stomach, gastric acid breaks down the protein molecules with the help of pepsin.
5- Partially digested food reaches down to the small intestine.
6- In the small intestine, the gall bladder is present that releases bile juice and reduces the size of fat molecules into fatty acids.
Which of the following is not true of viruses
I don’t know what the options are, but remember viruses are:
-nonliving (they cannot reproduce without a host)
-surrounded by a protein coat
-composed of DNA or RNA
-able to live for years
-unable to thrive outside of the host cell
-classified into 4 structural classes (helical symmetry, isometric symmetry, enveloped, bacteriophage)
Atoms such as carbon nitrogen and oxygen in a newborns body are brand new? True or false?
Answer:
i would like to say true
Explanation:
Atoms cannot be brand new in any product or organism.
Answer: False
Explanation:
Atoms are structures that are basic for all molecules. According to the law of conservation of mass it is said that atoms can neither be created nor be destroyed but they are transferred from one form to another, thereby the atoms of any elements that form a new product would have already been derived from the same element in the reactant, they would just be rearranged or will attain a different structural arrangement in order to form a new product.