Answer:
A. To reproduce
Explanation:
Cells divide in two stages: Meiosis - haploid cell division [½ number of chromosomes], and Mitosis - diploid cell division [same number of chromosomes]. Their objective is to produce offspring, which means reproduce.
I am joyous to help. Anytime.
Cells divide for multiple reasons, including reproduction, preventing tumor formation, and increasing their surface area-to-volume ratio.
Explanation:The reason cells divide is:
To reproduce: Cell division allows for the production of new cells, enabling growth and development in multicellular organisms, as well as reproduction in single-celled organisms.To prevent tumor formation: Cell division is tightly regulated to ensure that cells do not divide uncontrollably and form tumors. When cells divide, they undergo a process called mitosis, which helps maintain proper cell growth and avoid tumor formation.To have a smaller surface area: In certain cases, cells divide to increase their surface area-to-volume ratio. This is important for efficient nutrient exchange and waste removal, as smaller cells have a larger surface area relative to their volume.Learn more about Cell Division here:https://brainly.com/question/29773280
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Proteins, which are compounds made of nitrogen-rich amino acids, create waste products in the body of animals that must be eliminated. Which toxic compound is the primary concern of animal waste systems?
A. Nitrogen
B. Ammonium
C. Ammonia
D. Urea
Answer:
C
Explanation:
Ammonia is toxic to the body. Animals that live in water excrete their waste in ammonia (aqueous) form because it is less toxic when diluted. However, land animals need to convert the ammonia to a less toxic product such as urea before excretion. Ammonia is formed through deamination of amino acid.
ANSWER:
The correct option is C: Ammonia. Ammonia is a toxic and waste compound that is of concern.
EXPLANATION:
Proteins contain nitrogen and during the catabolism of nitrogen containing compounds, hydrogen, carbon and oxygen are extracted and stored in the "form of fats and carbohydrates "by the body.
The excess nitrogen however gets excreted from the body. The nitrogenous wastes form "toxic ammonia" which raises the level of pH of the body fluids. The toxic ammonia must be converted to "uric acid or urea" which is a non-toxic form.The way crops are changed by human interference is called
Farming
Harvesting
Domestication
Answer:
I think the answer is farming, plz lmk how it goes
Heat is transferred to the Earth's surface through the process of...
conduction
convection
radiation
reflection
Answer:
conduction is a correct answer.
Explanation:
Heat is transferred by three ways:
Conduction
Convection
Radiation
Conduction:
heat is transferred by the collisions which occur between the neighboring molecules. it occurs in the liquid and solids stage in which molecules are close to each other.Heat is transfer from the area of high heat to the area of low heat through direct contact. The molecules which are warmer they vibrate and collide with the molecules nearby and they transfer the energy.Heat is transferred to the Earth's surface through the process of Conduction,since air is not a good conductor, so most of the energy near Earth's surface is transfer by the conduction.
.
Answer:
The answer is C.) radiation.
Explanation:
Conduction involves two objects touching, convection is the motion of energy moving in a circular motion, and reflection is the motion of something reflecting off of another object. Radiation is the correct answer.
Which statement best explains why obsidian has a smooth glassy surface but basalt has a rough surface? Obsidian is formed due to compaction and basalt is formed due to weathering. Obsidian allows less crystal growth than basalt because it cools more rapidly than basalt. Basalt is more easily eroded than obsidian because it is formed at a lower temperature than obsidian. Basalt is formed from the erosion of sediments and obsidian is formed due to the metamorphosis of rocks.
Answer:
Obsidian allows less crystal growth than basalt because it cools more rapidly than basalt.
Explanation:
Both Obsidian and Basalts are igneous rocks. Igneous rocks from the solidification and cooling of magma.
The textures of igneous rocks relies mostly on their mode of formation. Igneous texture refers to the way minerals are formed and arranged in rocks.
When magma forms and cools rapidly, crystals of minerals don't have time to grow. This leads to the formation of a rock that would look like glass. An example of such rock is Obisdian. Obsidian's glassy and smooth texture is as a result of the way it was formed. This rock type is an extrusive igneous rock that forms on the surface where cooling magma solidifies rapidly and crystals have little to no time to solidify.
Basalt on the other hand is an extrusive igneous rock. The mineral grains here have some ample time to form. Basalt is made of mafic minerals which impacts some very interesting textures on the rock mass. The texture of a typical basalt is fine grained and the minerals can be seen when magnified. Cooling is not as rapid during the formation of basalts compared to obsidian.
Answer:
it is b
Explanation:
Describe how mutations lead to genetic variations.
Which appears to be more dangerous: the BRC1 or BRC2 mutation?
Analyze a woman’s risk of dying of cancer if she carries a mutated BRC1 gene.
How do heredity and inheritance relate to the data presented in these charts?
What data would you need to see in order to draw conclusions about the effectiveness of preventive surgeries?
What does the age at diagnosis tell you about the mutation?
Explain how breast-cancer genes are still present in the population, despite cancer-related surgeries and deaths.
a simple answer would be nice
Describe how mutations lead to genetic variations.
Mutations are changes in the DNA sequence of any organism. These DNA sequence comprise genes which control all the traits of an organism such as height, weight, eye color or which specific protein will be formed in body at which time. Everything is controlled by tiny pieces of DNA. If there occurs any change in the DNA sequence of an organism, it can be lethal to it, for example: In case of cancerous mutations where proteins controlling cell division are badly affected. Other mutations are simply passed to the offspring leading to genetic variations in the offspring. This is how mutations leads to the changes in genetic of an organism.
Which appears to be more dangerous: the BRC1 or BRC2 mutation?
The BRC1 and BRC2 are mutations or changes in the BRCA gene of humans mostly females. BRCA gene is basically a tumor suppressor gene which in some cases undergo mutations of different types. Some of which can be unharmful while BRC1 and BRC2 are typically very dangerous mutations because they increase the chances of a woman to develop breast cancer. Woman with BRC1 and BRC2 mutations have five times more risk of developing the breast cancer than other women. Studies suggest that BRC1 mutation is more dangerous than BRC2 mutations because a greater number of patients seen have BRC1 kind of mutation. Moreover, BRCA1 is associated with triple-negative breast cancer response in which a person cannot be fully treated with some drugs like which does not respond to hormonal trastuzumab and hormonal treatments.
Analyze a woman’s risk of dying of cancer if she carries a mutated BRC1 gene.
The risk of a woman to die with cancer due to with BRC1 mutation are quite high. This is because 18 percent of the women which develop breast cancer due to BRC1 mutation die while only 2.8 percent of the women who develop breast cancer due to BRC2 mutations die. This indicates substantially higher risk of BRC1 patients of dying as compared to BRC2 patients.
How do heredity and inheritance relate to the data presented in these charts?
Please add charts.
What data would you need to see in order to draw conclusions about the effectiveness of preventive surgeries?
There are several preventive surgeries used to prevent the chances of breast cancer in women. However, the genetic history of a person and her family’s genetic history is important to see before drawing some effective preventive surgery.
What does the age at diagnosis tell you about the mutation?
By looking at different cases of breast cancers and analyzing the data of different countries, we noticed that, the onset of disease takes several years because it is a genetic level mutation and the onset of mutation starts in earlier years of a woman’s life however she fully becomes a victim and notices it in late years of her life. This is why it cannot be easily diagnosed in early years even it is present there.
Explain how breast-cancer genes are still present in the population, despite cancer-related surgeries and deaths.
The genes responsible for breast cancer such as BRC1 and BRC2 are inherited from parents to offspring in a dominant fashion which means only one copy of gene is enough for the onset of the disease. Also because the disease is caused due to genetic level mutations, even if the doctors remove the cancers through surgeries they are not able to remove each and every affected gene from an organism which is passed from parents to offspring and still present in population.
Hope it helps!
Changes in the DNA sequence of any organism are known as mutations. These DNA sequences contain genes that determine all of an organism's characteristics, such as height, weight, eye color, and when a specific protein will be created in the body. Everything is governed by little strands of DNA.
Any alteration in an organism's DNA sequence can be fatal, for example, in the case of malignant mutations that cause proteins that control cell division to malfunction. Other mutations are simply passed down to the offspring, resulting in genetic differences. This is how mutations cause changes in an organism's genetic code.BRC1 and BRC2 mutations are often exceedingly hazardous since they enhance a woman's chances of developing breast cancer.BRC1 mutations are more harmful than BRC2 mutations because BRC1 mutations are detected in a higher percentage of individuals. BRCA1 is linked to triple-negative breast cancer, a type of cancer that can't be properly treated with some medications and doesn't react to hormonal therapy.Because of the BRC1 mutation, a woman's chances of dying from cancer are relatively high. This is owing to the fact that 18% of women who acquire breast cancer as a result of a BRC1 mutation die, whereas only 2.8 percent of women who develop breast cancer as a result of a BRC2 mutation die. This suggests that BRC1 patients have a significantly higher probability of dying than BRC2 patients.In order to reduce the risk of breast cancer in women, numerous preventive operations are performed. However, a person's genetic history, as well as the genetic history of her family, must be examined before deciding on an effective preventive surgery.According to data from various countries, the development of disease takes several years because it is a genetic level mutation that begins in a woman's early years of life but she completely becomes a victim and notices it in her later years. This is why, even if it is present in the early years, it is difficult to diagnose.Breast cancer genes such as BRC1 and BRC2 are passed in a dominant manner from parents to offspring, meaning that only one copy of the gene is required for disease initiation. Also, because the disease is caused by genetic abnormalities, even if surgeons surgically remove the malignancies, they will not be able to eliminate every afflicted gene from an organism that is handed down from parents to offspring and is still present in the community.Thus, breast cancer is caused by genetic abnormalities of BRC1 and BRC2 genes.
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Order the steps of protein synthesis,
Answer: Hola! My name is Marissa and im here to help !:) don't hesitate to give brainliest!
step1-start of synthesis
step2-initiation
step3 -elongation
final- elongation and termination
The first step in protein synthesis is the transcription of mRNA from a DNA gene in the nucleus.
before the protein synthesis, all of the component parts are assembled in the ribosome
step 2
In the cytoplasm, protein synthesis is actually initiated by the AUG codon on mRNA. The AUG codon signals both the interaction of the ribosome with m-RNA and also the tRNA with the anticodons (UAC). The tRNA which initiates the protein synthesis has N-formyl-methionine attached. The formyl group is really formic acid converted to an amide using the -NH2 group on methionine
step 3
Elongation of the peptide begins as various tRNA's read the next codon. In the example on the left the next tRNA to read the mRNA is tyrosine. When the correct match with the anticodons of a tRNA has been found, the tyrosine forms a peptide bond with the growing peptide chain .
step 4
When the stop signal on mRNA is reached, the protein synthesis is terminated. The last amino acid is hydrolyzed from its t-RNA.
Explanation:
Protein synthesis : It is a procedure in which cells make protein.
There are two stage of protein synthesis.
1): Transcription
2): Translation
The transfer of genetic instruction in DNA to mRNA in the nucleus is called transcription. Transcription include three steps:
a) initiation b) elongation and c) termination.
After the mRNA is managed it carries the command to a ribosome in the cytoplasm.
Translation happen at the ribosome in which contain rRNA and proteins. In a translation the command mRNA are read and tRNA gives the true order of amino acids to a ribosome. after that rRNA helps bonds structure between the amino acids, construct a polypeptide chain.
Then a polypeptide chain is combined it may undergo further processing to form the finished protein.
Helppppppppppppppppppppppppppppppppppppppppp me plz!!
??? i can't see it clear sorry
how do humans get the nitrogen that they need ?
Answer: Humans get the nitrogen they need by eating plants or other animals that contain nitrogen.
Explanation: When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. Bacteria alter the nitrogen into a form that plants are able to use.
Nitrogen is one of the essential component for human body as it helps in protein synthesis by getting involved in amino acid formation. Human gets nitrogen either from environment or through nitrogen-rich diet.
What is the necessity of nitrogen in human body?All tissues in the human body require nitrogen as an essential component.
it helps in making proteins in the muscles, skin, blood, hair, nails as well as DNA.
Human obtains protein through atmosphere as it comprises of 80% nitrogen as well as from diet.
Thus, it can be concluded that these are the sources of nitrogen for human beings.
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Name the animal with only bottom teeth.
Giraffe is the animal with bottom teeth.
Answer:
Giraffes only have bottom teeth.
What are the two main phases of the cell cycle? A. Prophase and anaphase B. Interphase and mitosis C. Replication phase and recombination phase D. Multiplication phase and division phase
Answer:
Letter B.... :)
ANSWER:
The correct option is B: Interphase and mitosis. The two major phases of cell division are interphase and mitotic phase.
EXPLANATION:
The cell-division or cell cycle cycle is a series of events that lead to cell growth and cell division. Interphase is the phase that leads to cell growth. Mitotic phase is the one that leads to cell division where DNA is replicated and division of cell organelles takes place to produce two daughter cells.Explain how scientific knowledge can help people make decisions that will benefit society
_was a key technique used to explain the structure of DNA
Answer:
X-ray crystallography
Explanation:
Its was a key technique to study and explain the structure of DNA based on X-ray shot's pattern, which was formed when these shots passed through the crystal of particular substance. This pattern provided information about molecular structure of DNA.
X-ray crystallography involves aiming X-rays at a crystal to generate a diffraction pattern, which is used to determine the 3D structure of a molecule. This technique was critical in discovering the double helix structure of DNA.
X-ray Crystallography and the Structure of DNA
X-ray crystallography was a key technique used to explain the structure of DNA. X-ray Crystallography involves aiming X-rays at a crystal containing many identical molecules.The X-rays scatter off the crystal and are collected on a detector, forming a diffraction pattern.This pattern is analyzed using mathematical methods to determine the three-dimensional structure of the molecule.Watson and Crick used X-ray crystallography data from Rosalind Franklin to elucidate the double helix structure of DNA.This method allows scientists to view molecules at an atomic level, making it integral for understanding complex biological structures.Complete question:
_was a key technique used to explain the structure of DNA
A. NMR spectroscopy
B. Electron diffraction
C. X-ray crystallography
D. Electron microscopy
5. After a signal is transmitted from the eyes through the optic nerve, which part of the brain processes the
visual information?
L
A. The frontal lobe
B. The occipital lobe
C. The limbic lobe
D. The temporal lobe
Answer: B. The occipital lobe
Which statement describes the term carrying capacity as it relates to a prairie
dog population?
Answer:
the statement that would best describe the term carrying capacity relating to prairie dog population would be "the maximum prairie dog population size, that a particular area can sustain over time".
It is the maximum capacity that a particular area can sustain in the presence of certain amount of fixed resources like food and habitat.
Answer:
it is .. the maximum number of prairie dogs that an area can support
Explanation:
PLEASE ANSWER FIRST GETS BRAINLIEST
Answer:
1. molecules
2. Olfaction
3. Genes
4.cilia
5. Nasal cavity
6. Pizza smell, it reminds of food which is good
7. It can have many purposes to small territory, food, mates.
8. Like in #6 a positive association in the limbic system means that youll have a positive association in the plastic system
Answer:
1. Cilia
2. Olfaction
3. Molecules
4. Genes
5. Nasal Cavity
6. I love the smell of sandalwood. My limbic brain plays a big role in my childhood, because when I was younger I used to smell it all the time, and my limbic brains love those memories.
7. Yes, It can help animals when they try to track down prey, navigate in the dark, and stay away from predators.
8. When something smells good it will more likely taste good as well.
Can someone help me with question 3?
Answer:
Explanation:
Do you want what is the seedling doing during the lag period when nothing seems to be happening?
If that is so, lots is happening.
The seed is developing a root system.The seed is in the beginning stages of germination. Very small leaves and very few in number are beginning to be seen.The plant is reaching towards the sunlight (called phototropism). It is not growing roots above ground and it is not developing its mass and height below ground. It is the miracle of how plants grow.Now that you have reviewed both immunity and the spread of disease, write an investigative question that you would like to answer by doing an experiment. Use the format “What is the effect of X on Y?”
Answer:
What is the effect of immunity on the spread of disease?
Explanation:
It links both immunity and the spread of disease into a question that suggests an independent and dependment variable.
Answer: What is the effect of immunity on the rate at which a disease spreads?
What produces NADH,ATP, and two pyruvate molecules?
A. Calvin cycle
B. Electron transport chain
C. Glycolysis
D. Krebs cycle
Answer: C (Glycolysis)
Explanation:
Glycolysis is present in nearly all living organisms.
A colorimeter is an instrument used for chemical analysis by comparing a liquid’s color with standard colors. In an experiment, a scientist used two colorimeters and noted the readings. The first colorimeter showed consistent readings that were five points lower than the actual reading. The second colorimeter provided readings that were the same as the actual reading. Which two statements are implications of these readings?
The first colorimeter is reliable but not valid.
The second colorimeter is valid and reliable.
Both the colorimeters are reliable and valid.
The readings of the first colorimeter can be used without repeating the experiment.
The readings of the second colorimeter aren’t reliable and can’t be used for the experiment.
Answer:
The correct statements are that the first calorimeter is reliable but not valid, and the second calorimeter is valid and reliable.
Explanation:
The first calorimeter is reliable as the reading demonstrated by it is similar when each time the experiment is performed, however, the result attained is not correct, though it is reliable. On the other hand, the second calorimeter is both reliable and valid, as it is demonstrating the accurate results from time to time. This is valid as it is providing a similar result as that of the original readings.
Answer:
Answer:
The correct statements are that the first calorimeter is reliable but not valid, and the second calorimeter is valid and reliable.
Explanation:
The first calorimeter is reliable as the reading demonstrated by it is similar when each time the experiment is performed, however, the result attained is not correct, though it is reliable. On the other hand, the second calorimeter is both reliable and valid, as it is demonstrating the accurate results from time to time. This is valid as it is providing a similar result as that of the original readings.
Explanation:
some flies produce up to 100 offspring in two weeks why is earth not covered with flies
Flies produce a lot of offspring. Their habitat is usually not near where humans live. You will occasionally get flies in your house if they are looking for a habitat that has food and water.
Answer:Because flies die quickly
Explanation:
If the birth rate is high, the death rate must also be high for populations to be balanced. Flies have a very short lifespan, and are eaten by other organisms.
Lubricants reduce friction by replacing sliding friction with fluid friction,
O
A. True
B. False
O
Enzymes can be recycled.
True
False
The given statement is true. Enzymes can be recycled.
What are enzymes?The chemical reactions, or metabolism, of our bodies are sped up by proteins known as enzymes. While certain chemicals are broken down, others are generated. Everything that is alive contains enzymes.
Naturally, enzymes are produced by our bodies. However, enzymes are present in both food and manufactured commodities.
One of the most important jobs of enzymes is to aid with digestion. Digestion is the process by which food becomes a source of energy. For instance, enzymes are found in our saliva, pancreas, intestines, and stomach.
The proper environment is necessary for enzyme activity. Enzymes can alter their form if certain criteria.
Therefore, The given statement is true. Enzymes can be recycled.
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is sometimes called secretion endocytosis. exocystosis
Answer:
Exocytosis
Explanation:
exo meaning out, cyt meaning cell, so the whole word literally means cell out, or stuff taken out of the cell. This is also what secretion means
Evolution of a species acts on the
of the species, not the
DONE
Answer:
population.
individuals.
Explanation:
Evolution of a species acts on the population of the species, not the individuals. The evolution occurs due to genetic variations.
What is Evolution?Evolution is the process of change in the heritable characteristics of the biological populations over the period of successive generations. The characteristics of evolution are the expressions of genes, which are then passed on from the parents to offspring during the reproduction process.
Factors which affect evolution include the environment and predation pressures which can have different effects on the ways in which the species are exposed to them evolve. Evolution shows the three main types of evolution including divergent, convergent, and parallel evolution.
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What is a quantitative observation?
Answer:
things that you can use numbers to express
Explanation:
Which of these could increase average global temperatures?
Answer:
Burning fossil fuels, over harvesting of petroleum.
Explanation:
If you cold attach the answers, I can give you a better answer.
The increase average global temperatures D Setting more factories . Therefore , D Setting more factories is correct.
The primary mechanism through which this occurs is the emission of greenhouse gases (GHGs) during industrial processes.
Factories often burn fossil fuels, such as coal, oil, and natural gas, for energy. Combustion of these fuels releases carbon dioxide (CO2), a major greenhouse gas, into the atmosphere.
Additionally, industrial activities may release other GHGs like methane (CH4) and nitrous oxide (N2O).
These gases trap heat in the Earth's atmosphere, leading to a gradual warming known as global warming.
Furthermore, some industrial processes release particulate matter and aerosols into the atmosphere.
While these particles can have a cooling effect by reflecting sunlight back into space, their impact is generally outweighed by the warming effect of greenhouse gas emissions.
The industrial sector also contributes to deforestation for resource extraction and infrastructure development.
Deforestation reduces the number of trees, which act as carbon sinks by absorbing CO2 during photosynthesis.
The loss of these carbon sinks intensifies the greenhouse effect.
Efforts to mitigate the impact of industrial activities on global temperature involve adopting cleaner technologies, improving energy efficiency, and transitioning to renewable energy sources.
Recognizing and addressing the environmental consequences of industrialization are crucial steps in mitigating climate change and promoting sustainable development.
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Question
Which of the following activities can increase the average global temperature of Earth?
A. Burning of fossil fuels
B. Planting of trees
C. Increased number of glaciers
D. Setting more factories
As longitudinal wave travel particles in the medium are pushed together and then pulled apart. we call this
Answer:
compression and rarefaction
Explanation:
This kind of wave is called a longitudinal wave and an example of such a wave is a sound wave. The center of compression can be analogous to the top of a crest of a transverse wave while the center of the rarefaction would be analogous to the bottom of the trough of a transverse wave.
Answer:
compression
Explanation:
The part of a longitudinal wave where the particles are more closely pushed together is called a compression.
Why do areas with a lot of vegetation have a cooler average temperature than similar areas with concrete?
Final answer:
Vegetation helps to regulate regional climates through evapotranspiration, which cools the air, whereas concrete in urban areas absorbs and retains more heat. This contributes to urban heat islands, where cities are warmer than rural areas. Trees and plants mitigate these temperature differences by providing shade and releasing water vapor.
Explanation:
Areas with a lot of vegetation tend to have a cooler average temperature compared to similar areas with concrete due to several factors involving energy balance and water cycles. Vegetation plays an essential role in regulating regional climates by influencing the water cycle through processes like evapotranspiration, where plants absorb water from the soil and release it as water vapor, cooling the air. Urban heat island is a phenomenon where urban areas, having a concentration of human activities, industry, transportation, and lots of impervious surfaces like concrete, absorb more solar energy, making them significantly warmer than the surrounding rural areas with more vegetation.
In rural areas, the abundance of vegetation allows more water to be available for evaporation, contributing to cooling. Urban areas with concrete have less infiltrated water and therefore, less moisture available for evaporative cooling. Concrete also has a lower heat capacity compared to water, allowing it to heat up and cool down much faster, which exacerbates the temperature differences. Lastly, plants not only absorb more heat than bare soil due to their albedos but also help mitigate the urban heat island effect by providing shade and releasing water vapor into the atmosphere, further cooling the surrounding air and enhancing comfort.
5. Which planet is made mostly of gases?
A Mars
B Venus
C Jupiter
D Mercury
Answer:
The answer is C Jupiter
Explanation:
Mercury, Venus, Earth and Mars are rocky planets.
Jupiter, Saturn, Uranus, and Neptune are made up of Hydrogen and Helium gas like a balloon.
Answer:
Jupiter is made mostly of gas
Explanation:
Taxonomists study the way organisms grow and develop before they are_____
Answer:
Born
Explanation:
Taxonomists study the way organisms grow and develop before they are born.
Final answer:
Taxonomists study organism growth and development prior to the naming and classification process, using the hierarchical taxonomy or Linnaean system, which groups organisms into nested categories from domains to species, based on shared characteristics and evolutionary relationships.
Explanation:
Taxonomists study the way organisms grow and develop before they are named and classified. Taxonomy, literally meaning "arrangement law", is the science of classifying organisms to construct internationally shared classification systems. This involves grouping species in a hierarchical system from the most inclusive to the most specific levels—a method initially developed by Carl Linnaeus. Within the taxonomic classification system, organisms are first divided into three large groups called domains: Bacteria, Archaea, and Eukarya. Subsequent categories of increasing specificity include kingdom, phylum, class, order, family, genus, and species. This hierarchical structure allows scientists to place each organism into nested groupings based on shared characteristics and evolutionary relationships. It is a dynamic system that changes as new species and data are discovered.