Answer:
All living organisms are classified into groups based on very basic, shared characteristics. Organisms within each group are then further divided into smaller groups. These smaller groups are based on more detailed similarities within each larger group.
Messenger interact with the active site of a receptor by_________
A) Lock n Key method
B) Induced fit method
C) Both (a) & (b)
D) None of these
Answer:
both of the models have enzymes that bind and the binding is covalent
Explanation:
Answer:
C) Both (a) & (b)
Tigers living in warm climates have thinner coats of fur than tigers living in cool climates.This is a result of
When you have tigers which in warmer climates are observed to have thinner coats and in colder climates are observed to have thicker coats this shows us the mechanism of adaptation and natural selection in play. Because they have a warmer climate around them they can hae a thinner coat and vice versa.
A scientist prepares to examine a slide of bacterial cells and another slide of animal cells
under a microscope. In which of the cells can she expect to observe lysosomes?
Group of answer choices
in the animal cells only
in the bacterial cells only
in both the bacterial and animal cells
. in neither the bacterial nor the animal cells
Answer:
The answer is C- Lysosomes are present in both bacterial and animal cells.
Explanation:
Lysosomes contain digestive enzymes inside them, which when released break down damaged cell parts. These enzymes are acidic in nature and are separated from other organelles with the help of a membrane.
Lysosomes help in killing bacteria and virus invading the cell body. Lysosomes also take part in the process of cell death known as 'apoptosis'. This happens only when a certain cell is beyond repair.
Lysosomes are present in plant cells, animal cells, bacterial and yeast cells.
Answer:
Its in the animal cells only
Explanation:
just trust me we went over this in class but if you want an explanation:
The plant cell has a cell wall, chloroplasts, plastids, and a central vacuole—structures not found in animal cells. Plant cells do not have lysosomes or centrosomes.
!HURRY! 20 POINT!
Describe the growth experienced by the city of Dubai. What environmental problems has the city faced? Your answer should be written in four or more complete sentences.
Dubai has rapidly urbanized in the previous 50 years, growing from a tiny fishing community to a significant city. The finding of oil in the area led directly to this urbanization.
What growth experienced by the city of Dubai?Dubai was able to develop beautiful structures, resorts, and artificial islands because of its oil sector wealth. There were 1 million individuals drawn to this. Because environmental considerations were not completely taken into account as building took place, the city has had problems as a result of this rapid growth.
The city's water supplies are the cause of Dubai's biggest issues. The absence of waste treatment options is a worry because it leads to water pollution. Industrial garbage and sewage have been poured into waterways. The restricted quantity of freshwater is another issue.
Therefore, Desalination procedures are now required in Dubai because of the city's enormous population in order to supply residents with drinking water.
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Answer:
Over the last 50 years, Dubai has experienced rapid urbanization, evolving from a small fishing village to a major city. This urbanization was a direct result of the discovery of oil in the region. Wealth from the oil industry allowed Dubai to create impressive buildings, resorts, and artificial islands. This attracted a population of 1 million people. This fast growth has caused issues for the city because environmental concerns were not fully considered as construction occurred. The greatest problems in Dubai are related to the city’s water resources. Water pollution is a concern because of the lack of waste treatment options. Sewage and industrial waste have been dumped into water sources. Also of concern is the limited supply of freshwater. With Dubai’s large population, desalination processes have become necessary to provide people with drinking water.
Explanation:
got it right on t4l
what would happen if we remove a producer from a food web?
Answer:
The Consumer who ate the Producer would die out.
Explanation:
Answer:
Every living organism will die.
Explanation:
Plants are the only organisms that can make their own food. The removal of producers would cause the entire food web to collapse. Primary consumers (herbivores), which feast on producers directly, would die off. Including us humans, since we get our food from the earth's soil, in other words, from plants. Secondary consumers (carnivores) are the next to be affected: they are the ones that eat primary consumers. Superior consumers would suffer as organisms of lower trophic levels begin to die off. Decomposers would break down corpses of dead animals, returning their fundamental components and composites to the environment. Nevertheless, even these dead organisms would run out, and the entire food web would collapse.
The greenhouse effect _______.
a.
is essential for life on Earth
b.
warms Earth’s atmosphere
c.
is a natural phenomenon
d.
all of the above
Answer is option d. all of the above
The greenhouse effect is a natural phenomenon that warms Earth's atmosphere. It is essential for life on Earth because it traps heat from the sun, which keeps the planet's temperature at a level that is suitable for life. Hence option D) all the above is correct.
The sun's rays hit Earth's atmosphere. Some of the rays are reflected back into space, but some are absorbed by gases in the atmosphere. The gases that absorb the rays, such as carbon dioxide, water vapor, and methane, trap the heat and keep it from escaping.
The trapped heat warms Earth's atmosphere and surface. Without the greenhouse effect, Earth's average temperature would be about -18 degrees Celsius (-0.4 degrees Fahrenheit). This is too cold for life to exist.
However, human activities are increasing the greenhouse effect by emitting more greenhouse gases into the atmosphere. This is causing the planet to warm, which is leading to climate change.
So, the greenhouse effect is essential for life on Earth, but it is also being affected by human activities. This is a cause for concern, as it could lead to more extreme weather events and rising sea levels.
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Raju’s cousin has come to visit his city.He notices that the dustbins in Raju’s city are of two colors-blue and green.a.explain the reason to him.
Answer:
Different coloured dustbins are used in areas so that one waste type can be separated from another.
Mostly, a blue bin is used for materials which can be recycled. For instance, plastic which can be recycled can be placed in this bin. Papers, paints, can of drinks are to be thrown in the blue bins.
In the green bin, waste related to or produced from the living organisms has to be thrown. It is also known as wet waste. For example, tea, coffee, cotton, hair etc are to be thrown in the green bin.
Which of the following best describes the process of transcription during protein synthesis?
A. to pair tRNA with mRNA
B. to deliver amino acids to the nucleus
C.to produce anticodons that will be delivered to the ribosome
D. to make an RNA copy of a gene's DNA sequence
Answer:
The answer is 'D'. Transcription is the process by which a single stranded mRNA is formed from the double stranded DNA.
Explanation:
The central machinery of biology involves three processes- replication, transcription and translation. The process by which DNA doubles itself is called replication. In translation, protein is formed from the messenger RNA or mRNA. The major steps involved in transcription are:
InitiationElongationTerminationIn the process of translation, amino acids bind together in the ribosome to form a polypeptide chain.
Answer:
D I think
Explanation:
Why are there many separate ecosystems in a rainforest
Answer:
Because there are different conditions that support different organisms.
Explanation:
What happens when you turn on a
light?
A. Electrical energy is transformed into heat and
light.
B. Electrical energy is transformed into motion
and light.
C. Electrical energy is transformed into nuclear
energy and light.
D. Electrical energy is transformed into sound
and heat.
Answer:
A
Explanation:
When the electricity runs through the wire and begins to heat up, it starts to give of heat and light energy, because the wire becomes hot and reacts with the gas in the light bulb to make light.
Hope this helps:)
Explain Earth’s gravity as it orbits the Sun.
Answer:
the Earth orbits the Sun because of the pull of the Sun's gravity. This happens because the Earth has a acceleration in the direction perpendicular to the force of the Sun's pull and if the Sun weren't there, the Earth would travel in a straight line.
Explanation:
What was the main goal of the Human Genome Project
The purpose of the Human Genome Project was to map out the complete sequence of human DNA, leading to a greater understanding of our genetic makeup and the potential genetic basis of diseases for medical advancements.
Explanation:The main goal of the Human Genome Project was to determine and map out the complete sequence of DNA base pairs of the human genome. This refers to understanding the genetic makeup of the human species. By doing so, we could gain a better understanding of human evolution, genetics, and the potential for medical breakthroughs such as uncovering the genetic basis of diseases. Ultimately, the project aimed to boost our understanding and potential manipulation of human genetics to improve health and medicine.
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The main goal of the Human Genome Project was to sequence the entire human genome, gain a better understanding of human chromosomes, and use the data for applied research on genetically related diseases.
Explanation:The main goal of the Human Genome Project was to sequence the entire human genome, which is the complete collection of genes in an individual. By analyzing and mapping the DNA subunits and the location of each gene, researchers aimed to gain a better understanding of human chromosomes and genetic makeup. This project relied on basic research with both simple organisms and the human genome, with the ultimate goal of using the data for applied research like finding cures and early diagnoses for genetically related diseases.
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You have a series of cells, all of which were derived from tumors, and you first need to find out
which ones are malignant. What could you do?
a. See which ones are not overproliferating.
b. Find out which ones have a higher rate of apoptosis.
c. Karyotype samples to look for unusual size and number of chromosomes.
d. Measure metastasis.
e. Time their cell cycles.
Answer:
The correct answer is option c. "Karyotype samples to look for unusual size and number of chromosomes".
Explanation:
The number and arrangement of chromosomes are two features that differentiate between a cancer cell that is malignant and a cancer cell that is non malignant. Fortunately, a basic karyotype experiment will be enough to spot a malignant cancer cell. In a karyotype, an unusual large size and an unusual number of chromosomes (aneuploidy) will be indicatives of the presence of malignant cancer cells.
Which system is responsible for providing structure and support?
Answer:
it's the skeletal system
Explanation:
Answer:
Your skeletal system
Explanation:
Your bone are in this system and they help you stay upright.
How are the processes of photosynthesis and respiration related to one another?
Answer:
Photosynthesis and respiration are so interrelated with each other that one’s product are used as another’s reactant.
Explanation:
Photosynthesis is a process used by organisms to convert 'light energy' into 'chemical energy', which is used as a source of energy for the organism. Respiration is a process in which glucose and oxygen is used to create ATP for the survival of the organism. During photosynthesis 'water and carbon dioxide' reacts in presence of light to create oxygen and glucose. Without photosynthesis and respiration life ceases to exist on earth.2. Explain the strengths or skills that you have and how they contribute to either academic or personal
accomplishments.
Answer:
The strengths or skills that I have are "high self-esteem" and "optimism."
Explanation:
Self-esteem refers to the confidence in doing a particular task while optimism is all about being positive in any situation.
Firstly, having a high self-esteem made me reach my goals in life. For example in school, I would always showcase my abilities and skills in every subject, without worrying about my classmates' opinions, criticisms or comments. I was able to enter the best university because of my high self-esteem. I've always been confident about passing every examination with flying colors. Secondly, my optimistic personality gave me the courage to rise every time I fall or fail. It is natural to have failures in life and all you have to do is to get back on your feet, realize your mistakes and do better next time. Being optimistic gave me the strength to move on and focus on worthy issues.
Personally speaking, having a high-self-esteem and being optimistic nurtured my social relationships. They gave me confidence in dealing with people and guided me in responding to conflicts. I was also able to become a better version of myself.
If an isotope of some element has a half-life of 300 years, about how much of the isotope atoms will be in a sample after 300 years?
Answer:
The isotope atom in the sample after 300 years will be half.
Explanation:
If the half life of the isotope of an element is 300 years, after 300 years, in this case the mass of the sample provided will become half of the previous initial mass of the substance. As we know the half life is the time that is required for the element to change or decay. The radioactive isotopes have their own half life which are found to be independent of various factors i.e. temperature, concentration and other chemical changes.
22. Why are nitrogenous bases so important?
Answer:A set of five nitrogenous bases is used in the construction of nucleotides, which in turn build up the nucleic acids like DNA and RNA. These bases are crucially important because the sequencing of them in DNA and RNA is the way information is stored.
Final answer:
Nitrogenous bases are essential because they form the genetic code in DNA and RNA, transmitting instructions for protein synthesis that govern the development and functioning of organisms.
Explanation:
Nitrogenous bases are crucial components of nucleotides, which are the building blocks of nucleic acids like DNA and RNA. These organic molecules contain carbon and nitrogen and are classified as bases due to their ability to bind an extra hydrogen ion, which reduces the hydrogen ion concentration, making their environment more basic. There are four nitrogenous bases in DNA: adenine (A), guanine (G), cytosine (C), and thymine (T). In RNA, uracil (U) replaces thymine.
The sequence of nitrogenous bases in DNA and RNA is crucial because it dictates the genetic instructions used in the development, functioning, and reproduction of all known living organisms and many viruses. These instructions are transmitted through the sequences of the bases, adopting a code that directs the synthesis of proteins, which in turn play a crucial role in cellular structure and function.
_______ are organisms that recycle nutrients from decaying organic material.
Answer:
Decomposers
Explanation:
Decomposers decompose organic material, effectively recycling it.
if a strong odour smell continuously for sometime,the sensation of smell of that substance weaken...why?
Answer:
Diffusion
Explanation:
The definition of diffusion is that: The movement of particles and ions from the area of higher concentrated region to the area of lower concentrated region due to the result of their random movement . When the strong odour particles are in one place it becomes concentrated in that area. Therefore, according to this, the odour diffuses from the higher concentrated area to the lower concentrated area, causing the particles to bounce off and spreading in all directions which results to the sensation of smell of the strong odour weakening.
Answer:
Olfactory fatigue/adaptation-after being exposed to a particular smell for a prolonged time, the smell sense diminishes. This temporary and normal
Explanation:
This adaptation is important as it prevents our nervous system from information overload
What is the brown structure embedded in the cell membrane? What is the function of this brown structure?
Which ecosystem has a better chance of
surviving when environmental conditions change
over a long period of time?
a. one with a great deal of genetic diversity
B.one with plants and animals but no bacteria
C.one with animals and bacteria but no plants
d. one with little or no genetic diversity
ooo
The ecosystem that has a better chance of surviving should be that deals in genetic diversity.
What is genetic diversity?It means the range of various inherited traits that lies within the species. In the case when the species does have high genetic diversity so there are various individuals that does have various traits. So for surviving purpose at the time of change in the environmental conditions for the long period of time the one should be dealt with the genetic diversity.
Therefore, the option a is correct.
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An ecosystem with a great deal of genetic diversity has the best chance of survival when facing long-term environmental changes, as it offers a wide range of adaptable traits and maintains ecosystem health.
Explanation:An ecosystem with a great deal of genetic diversity has a better chance of surviving when environmental conditions change over a long period of time. This is because genetic diversity acts as the raw material for adaptation and evolution within species. It allows for a higher variety of traits that may offer advantages under new environmental conditions. Genus B, which has greater genetic diversity, is more likely to harbor traits that confer an advantage in the changed environment, and thus has a higher probability of thriving compared to a genus with little or no genetic diversity.
Ecosystems with diverse interactions between plants, animals, and bacteria, such as the ones in coral reefs and prairies, show that loss of diversity can lead to a decline in biological productivity and co-adaptation features. An ecosystem lacking components such as bacteria or plants would struggle to maintain its ecological functions. Therefore, a diverse ecosystem not only contributes to the adaptability of individual species but also to the overall health and sustainability of the ecosystem itself.
What do you think is the evolutionary significance of DNA polymerase? What do you think would happen if there was a genetic mutation on the genes encoding for DNA polymerase?
Hi I was gonna say that I needed help in this too because eventhough i did the reading im still struggling to undestand this
DNA polymerase is crucial for accurate DNA replication and maintaining genetic stability in organisms. Mutations in the enzyme can increase mutation rates or be lethal, and the enzyme's proofreading ability is essential for DNA error correction and generating genetic variation necessary for evolution.
The evolutionary significance of DNA polymerase is profound, as it's a key enzyme responsible for replicating DNA during cell division, ensuring that genetic information is accurately passed on to daughter cells. Its ability to proofread and correct errors during DNA synthesis is critical for preventing mutations and maintaining genetic stability. DNA polymerase also contributes to genetic variation, which is the raw material for evolution by natural selection. Without this variation, evolutionary processes would stagnate, and species would be less adapted to change.
Mutations in the genes encoding for DNA polymerase could have serious implications for an organism. If the proofreading function is impaired, the mutation rate increases, potentially leading to diseases such as cancer. On the other hand, a complete lack of DNA polymerase activity would be lethal, as DNA replication is essential for cell division and survival.
Genetic variation is introduced during DNA replication through the occasional errors made by DNA polymerase, even with its proofreading ability. If DNA replication were error-free, this source of variation would be lost, severely limiting evolutionary potential. Moreover, changes such as mutations, deletions, duplications, and the subsequent repair can affect the genetic makeup of organisms.
Role of a Primer in DNA Replication
A primer is required to start DNA replication because DNA polymerases can only add nucleotides to an existing strand. Without a primer, DNA polymerases would have no starting point, making replication impossible, which would be evident in a DNA sequencing reaction that lacked a primer in its mix.
Why is it important for the chromosomes to condense during mitosis?
Question 2 options:
to facilitate DNA replication
to facilitate chromosome movement
to facilitate cytokinesis
to facilitate spindle formation
Answer:
It is important for the chromosomes to condense during mitosis to facilitate chromosome movement.
Explanation:
The chemical called colchicine is found to be used during the process of mitosis, so as to freeze the cells, which can stop or prevent the movement of the chromosomes. This process is also essential for the faithful genome replication or transmission to those daughter cells. During the interphase cell division occurs but during the prophase the cell condensation is found to be happening. Before the process of the mitosis chromosomes are allowed to move and during this entangled and breaking were also noticed.
What is the inner layer of the earth
Answer:
Earth (From order to crust to inner core)
Crust
Mantle
Outer Core
Inner Core <----Most inner layer
which of the following farming practices use water most efficiently? select two
-tilling soil
-planting perennial crops
-using drip irrigation
-planting annual crops
-using sprinklers
Answer:
-tilling soil
-using drip irrigation
Explanation:
I’m taking AP Environmental Science and we learned that tilling soil reduces the amount of moisture lost. Drip irrigation also saves water by dripping water slowing to plants.
The farming practices that make use of the water most efficiently are tilling soil and using drip irrigation. Thus the option A and C are correct.
What are farming practices ?Farming practices refer to the use of farm inputs to make most of the land. Such as crop rotation method, reducing of the tillage, and use of est management.
Adopting of agroforestry. Other includes pastoral farming and shifting cultivation etc. The methods that can save most of the water source are tillage and the use of drip irrigation systems.
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write two examples and two characteristics of monocot and dicot plant
Answer:
MONOCOTS DICOTS
Embryo with single cotyledon Embryo with two cotyledons
Pollen with single furrow or pore Pollen with three furrows or pores
Flower parts in multiples of three Flower parts in multiples of four or five
Major leaf veins parallel Major leaf veins reticulated
Explanation:
Monocots include most of the bulbing plants and grains, such as agapanthus, asparagus, bamboo, bananas, corn, daffodils, garlic, ginger, grass, lilies, onions, orchids, rice, sugarcane, tulips, and wheat.
Answer:
Dicot plant examples China Rose and
Castor
Monocot examples Daffodils,Garlic,Lilies
What is a gene?
A. A piece of DNA that controls a trait
B. A specific form of an allele
C. A Chromosome that determines gender
D. A group of chromosomes
Answer: A). A piece of DNA that controls a trait
Explanation: A gene is a functional unit of hereditary. A gene determines the characteristics of an offspring. Genes are said to be functional unit of hereditary because they are transferred from the parents to the offsprings.
A gene is a nucleotide sequence found on a chromosome which determines a trait in an individual.
Answer:
A.)
Explanation:
Microscopic analysis is the most reliable method of matching hair samples to a suspect. True False
Answer:
The answer is false.
Explanation:
Although very popular in crime novels and TV shows, microscopic hair analysis isn't as reliable as it may seem. It was widely used during 1950-s and 1960-s as the best test to match a hair sample with the suspect, but modern tests proved it to be wrong. Microscopic analysis can give some information about the hair sample such as origin (human, animal or synthetic fiber), color, pigment distribution... For example, if the hair sample found was brown, and the suspect was black-haired, we could claim that he was Innocent. But if the found hair was black, does that mean that we could be absolutely sure that the suspect is guilty? Of course not, microscopic analysis can not provide evidence for that claim. On the other hand, the best method for matching biological samples, at the present time, is DNA analysis.
Answer:
faulse
Explanation:
Water droplets sticking to spider webs is caused by the same property that caused a water droplet to stick to your finger in your lab. What property of water is responsible?
Question 15 options:
capillary action
surface tension
cohesion
adhesion
Answer:
Adhesion
Explanation:
Its just like Water drops on a pine needle or on anything else, Cohesion is when water is attracted to water. Therefor its Adhesion, because that's when water is attracted to other things or substances.