Can someone tell me which are true and which are false plz don’t answer if your going to be rude :/I want to go to sleep

Ultraviolet light can be the answer to future outbreaks because it has the capability to kill the microorganisms present in air and thus can prevent the infectious diseases caused by them.

Ultraviolet light is the EM radiation with the wavelength range 10 nm to 400 nm. It is already being used in research labs for maintaining the microbe free environment. Researches are also being conducted to produce such ceiling lights that can be used normally in households so that the the air-borne microorganisms can be killed.

Microorganisms are the small living organisms not visible to the unaided eyes. They have the strong capability to produce their new variants by mutation and cause infectious diseases. The ultraviolet light can kill them even before they are able to transform themselves.  

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Answer: They are spontaneously aborted

Explanation:

Continuous and discontinuous modes of replication can be distinguished experimentally by analyzing the pattern of synthesized DNA fragments using DNA sequencing techniques.

One experimental approach involves the use of radioactive or fluorescent nucleotide analogs. In continuous replication, where the leading strand is synthesized continuously, a continuous DNA label will be observed along the entire length of the replicated DNA strand.

In contrast, in discontinuous replication, where the lagging strand is synthesized in fragments (Okazaki fragments), distinct discontinuous DNA labels will be observed.

Another method is DNA sequencing. By sequencing the replicated DNA, researchers can examine the sequence of nucleotides and identify any interruptions or gaps in the sequence, which would indicate a discontinuous mode of replication.

Furthermore, electron microscopy can be utilized to visualize the replication process. In continuous replication, a continuous DNA loop will be observed, whereas, in discontinuous replication, multiple loops or fragmented structures will be visible.

These experimental techniques can provide valuable insights into the mode of replication and distinguish between continuous and discontinuous DNA synthesis.

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Answer:

A. Duodenum

B. Liver

C. Stomach

D. Pancreas

E. Large intestine

F. Gallbladder

Answer:

Oxygen makes up about one-fifth the volume of Earth'­s atmosphere today, and is a central element of life as we know it.

But that wasn'­t always the case. Oxygen, although always present in compounds in Earth'­s interior, atmosphere, and oceans, did not begin to accumulate in the atmosphere as oxygen gas (O2) until well into the planet'­s history. What the atmosphere was like prior to oxygen'­s rise is a puzzle that Earth scientists have only begun to piece together.

Earth coalesced a little more than 4.5 billion years ago from bits of cosmic debris. Liquid oceans existed on the planet almost from the beginning, although in all likelihood they were repeatedly vaporized by the massive meteorites that regularly clobbered the planet during its first 700 million years of existence. Things had settled down by 3.8 billion years ago, when the first rocks that formed under water appear in the geologic record. (They exist in what is now southwest Greenland.)

If Earth had water, it must have had an atmosphere, and if it had an atmosphere, it must have had a climate. What was Earth'­s early atmosphere made of? Nitrogen (N2), certainly. Nitrogen makes up the bulk of today'­s atmosphere and likely has been around since the beginning. Water vapor (H2O), probably from volcanic emissions. Carbon dioxide (CO2), also emitted by volcanic eruptions, which were plentiful at that time. And methane (CH4), generated inside the Earth and possibly also by methane-producing microbes that thrived on and in the seafloor, as they do today.

Carbon dioxide, water vapor, and methane played an important role in Earth'­s subsequent development. Four billion years ago, the Sun was 30 percent dimmer, and therefore colder, than it is today. Under such conditions, Earth'­s water should have been frozen, yet clearly it wasn'­t. The water vapor, carbon dioxide, and methane acted as greenhouse gases, trapping heat and insulating the early Earth during a critical period in its development.

Of oxygen, meanwhile, the early atmosphere held barely a trace. What did exist likely formed when solar radiation split airborne molecules of water (H2O) into hydrogen (H2) and oxygen (O2). Hydrogen, a lightweight gas, would have risen above the atmosphere and slowly been lost to space. The heavier oxygen gas, left behind, would have quickly reacted with atmospheric gases such as methane or with minerals on Earth'­s surface and been drawn out of the atmosphere and back into the crust and mantle. Oxygen could only begin to accumulate in the atmosphere if it was being produced faster than it was being removed'—in other words, if something else was also producing it.

That something was life. Although the fossil evidence is sketchy, methane-producing microbes may have inhabited Earth as long ago as 3.8 billion years. By 2.7 billion years ago, a new kind of life had established itself: photosynthetic microbes called cyanobacteria, which were capable of using the Sun'­s energy to convert carbon dioxide and water into food with oxygen gas as a waste product. They lived in shallow seas, protected from full exposure to the Sun'­s harmful radiation. (To learn more about these organisms and the fossil evidence for them, watch the accompanying video "Early Fossil Life.")

The rate of cooling is inversely proportional to the crystal size. The faster the cooling rate, the smaller is the crystal size and the slower the cooling rate, the larger is the crystal.

Rate of cooling can be defined as the elimination or removal of the high temperature from any object. This removal and be slow and gradual, therefore slow rate of cooling; or it cab quick and instant, therefore, fast rate of cooling.

Crystals are the solid components whose molecules are arranges in a regular fashion, giving it an ideal 3 dimensional pattern. They are symmetrical in nature. The examples of crystals are sugars, salt, etc.

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Answer:

All viruses contain nucleic acid, either DNA or RNA (but not both), and a protein coat, which encases the nucleic acid. Some viruses are also enclosed by an envelope of fat and protein molecules. In its infective form, outside the cell, a virus particle is called a virion.

Explanation:

A neuron excretes neurotransmitters through its membrane by a process called exocytosis. The correct option is b.

In this process, neurotransmitters are packaged within synaptic vesicles and transported to the presynaptic membrane. Upon receiving an action potential, these vesicles fuse with the membrane, releasing neurotransmitters into the synaptic cleft. These chemical messengers then travel across the synaptic cleft and bind to specific receptors on the postsynaptic neuron, initiating a response. This process plays a crucial role in neuronal communication and enables the transfer of information between neurons.

Reuptake, on the other hand, refers to the process by which neurotransmitters are reabsorbed by the presynaptic neuron, helping to regulate and maintain synaptic function. Endocytosis involves the uptake of external substances into the cell through the formation of a vesicle. Synaptic diffusion is not a recognized term in neurobiology, and it may be a misnomer or confusion with synaptic transmission or diffusion of neurotransmitters within the synaptic cleft.

In summary, exocytosis is the process by which a neuron releases neurotransmitters through its membrane, facilitating communication between neurons and the proper functioning of the nervous system. Thus, the correct option is b.

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In living organisms, mitosis helps with tissue repair and size expansion.

Before mitosis starts, the chromosomes have duplicated and the proteins that make up the spindle of the mitotic cell have been produced. Prophase is when mitosis begins, as shown by the chromosomes thickening and coiling. The nucleolus, an expanding sphere, collapses and disappears.

The commencement of a collection of fibers organizing to form a spindle and the breakdown of the nuclear membrane, respectively, mark the beginning and end of prophase.

Traditionally, mitosis is divided into five phases: Prophase, Prometaphase, Metaphase, Anaphase, Telophase, and Cytokinesis.

Prophase:- Prophase is the initial stage of cell division in both mitosis and meiosis. DNA replication begins after interphase and begins when the cell reaches prophase. The essential processes occur during prophase, including chromatin reticulum condensing and nucleolus disappearing.

Prometaphase:- Prometaphase, the second stage of mitosis, is the division of the duplicated genetic material present in a parent cell's nucleus into two identical daughter cells. Prometaphase is characterized by the breakdown of the nuclear envelope, a protective physical layer around the nucleus.

Metaphase:- Chromosomes enter mitosis, also known as metaphase, during the second most tightly wound and condensed condition of the eukaryotic cell cycle. Before being split into the two daughter cells, the genetically encoded chromosomes align at the cell's equator.

Anaphase:- The mitotic stage known as anaphase follows the metaphase procedure, which divides replicated chromosomes and transfers the freshly copied chromosomes to opposing poles of the cell.

Telophase:- When the chromosomes migrate in opposing directions during the telophase, the process of cell division's last phase, two new cells can be created from a single cell. When a cell completes the process of meiosis or mitosis, it enters a phase where it is effectively getting ready to split into two new cells.

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Answer:

D. Its Shape changes

Explanation:

Answer:

i think the answer would be that everything else will change and adapt differently because something is missing.

Answer:

A forest

Explanation:

An ecosystem is a unity between a community and its environment that forms a reciprocal relationship.

example

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Answer:

A. virus

HIV is caused by a virus. It can spread through sexual contact, illicit injection drug use or sharing needles, contact with infected blood, or from mother to child during pregnancy, childbirth or breastfeeding.

Polio, or poliomyelitis, is a disabling and life-threatening disease caused by the poliovirus. The virus spreads from person to person and can infect a person's spinal cord, causing paralysis (can't move parts of the body).

Explanation:

Hope this helps! =D

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Answer: Virus

Explanation: polio is also known as poliomyelitis or poliovirus and AIDS is caused by a virus

Juno will be changing the atmospheric water content of Jupiter. In order to learn more about the creation of Jupiter's map, the juno spacecraft will perform scientific research on Jupiter.

Jupiter's magnetic field gauges the planet's deep atmosphere's water content and keeps watch over us.

The gravity, science, and magnitometer equipment on the juno spacecraft will map the gravitational and magnetic fields of Jupiter to understand its deep structure. the spacecraft for Juno. Additionally, the spacecraft contains a microwave radiometer that will explore Jupiter's deep atmosphere and gauge its water and oxygen content. Juno's work includes the following,

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When working muscles metabolize glucose anaerobically, a build-up of lactic acid can lead to muscle fatigue and declining physical performance.

During intense exercise or when oxygen supply is limited, muscles can break down glucose without the presence of oxygen through a process called anaerobic glycolysis. This process generates ATP (adenosine triphosphate), the energy currency of cells, but also produces lactic acid as a byproduct. As the muscles continue to work, the production of lactic acid increases.

The build-up of lactic acid contributes to muscle fatigue and declining physical performance in several ways. Firstly, high levels of lactic acid can interfere with the muscle's ability to contract efficiently. This decrease in pH inhibits enzymes involved in muscle contraction, leading to a decline in force production.

Secondly, lactic acid accumulation can impair the replenishment of energy stores within the muscle. The presence of lactic acid inhibits the production of glycogen, the stored form of glucose in muscles. As glycogen levels decline, the muscle's capacity to generate ATP diminishes, further contributing to fatigue and reduced performance.

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Answer:Osteoporosis refers to an ailment characterized by reduced bone mass and loss of bony tissue that may lead to weak and fragile bones. In an experiment, Dr. Travis tested the influences of the consumption of calcium on osteoporosis, the condition that results in enhanced chances of bone fractures.  

In the given experiment, the amount of calcium is the independent variable, and the risk of bone fractures could get changed with the amount of calcium consumption.  

Explanation:

Answer:

The answer is A; we see a whole instead of small pieces

Explanation:

Answer:

The answer was A

Explanation

apex

Answer:

Anthropology

Explanation:

this is the answer hope it helps you

As a result of the "better" features produced by modifying genes, GM crops can cause the natural process of gene flow to be disrupted. Farmers, trade, and the environment are all in jeopardy as a result.

GM crops are plants whose DNA has been altered through the use of genetic engineering techniques for agricultural reasons. BT brinjal, GM mustard, and Protato (a potato high in protein) are a few examples of genetically modified crops.

Agricultural practices may have negative impacts that are accelerated by genetic engineering, have an impact similar to that of conventional agriculture, or help to conserve natural resources, especially biodiversity, while having a similar or even more positive impact.

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If each codon were composed of only one nucleotide, then there would be no codon for any of the 20 amino acids.

Here, correct option is C.

This is because the genetic code is based on a triplet codon system, meaning that each codon is made up of three nucleotides. Each of the four nucleotides (A, C, G, and T), when used in a triplet codon, can create a total of 64 different codons, but only 20 of those codons code for one of the 20 amino acids.

Since only three nucleotides can be used in a codon, and each codon is made up of only one nucleotide, there would be no codon for any of the 20 amino acids. Therefore, if each codon were composed of only one nucleotide, there would be no code for any of the 20 amino acids.

Here, correct option is C.

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complete question is :

if each codon were composed of only 1 nucleotide, for how many amino acids (out of the 20) would there not be a code for?multiple choice question.

A. 2

B. 4

C. NO codon

D. 12

Answer:

The answer should be C

Explanation:

Main answer: During translation, the stop codons are recognized by a protein called a(n) **release** factor.

Supporting answer: The process of translation involves the conversion of the mRNA sequence into a chain of amino acids, which are assembled into a protein. The sequence of codons in the mRNA determines the order in which amino acids are added to the growing protein chain. When a stop codon is reached in the mRNA sequence, it signals the end of the protein chain and the release of the completed protein. This is accomplished by a protein called a release factor, which recognizes the stop codon and causes the ribosome to detach from the mRNA. There are three stop codons in the genetic code: UAA, UAG, and UGA.

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Answer:

The 3 limiting factors that might drive competition within a single species is the food, availability of mates, disease, and shelter (biotic factors) and temperature, climate, sunlight, rainfall, natural disasters, and pollution (abiotic factors).

Explanation:

These factors limit the size of populations. As a population grows, there is more and more competition for the limited resources that Earth provides.

Biotic factors are living things that affect the ecosystem (like when we manually burn/chop down trees and destroy habitats of animals who used to live there).

Abiotic factors are non-living things (natural causes) that affect the ecosystem (like climate change causing the melting of glaciers and mass burning of trees (aka forest fire))

I hope I got it right!! :D

Also if this was for your homework or something, i hope this helps you! :D

Water, Food, and Mates are examples of limiting resources that drive competition. With all of these in place, each species drive to thrive in their environment but they are limited; This creates competition within the species.

When a twirling ice skater brings her arms inward, her rotational speed increases because of the reduction in rotational inertia.

Rotational inertia is the resistance to rotational motion and is determined by the distribution of mass in the object and the distance of the mass from the axis of rotation. The closer the mass is to the axis of rotation, the lower the rotational inertia.

When the skater brings her arms inward, she is decreasing the distance of the mass from the axis of rotation, thus decreasing the rotational inertia. This reduction in rotational inertia allows the skater to spin faster while conserving angular momentum, which is the product of rotational inertia and rotational speed.

The reduction in rotational torque, which is the force that causes rotational motion, does not play a significant role in increasing the skater's rotational speed. Additionally, the increase in RPMs mentioned in option d is not a result of the skater's actions but rather an outcome of the increased rotational speed caused by the reduction in rotational inertia.

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Answer:

A breeding programme for endangered animals is where endangered animals are taken from their natural habitats in the wild and bred together in captivity to stop them going completely extinct. For example in the UK, beavers were endangered until they were entered into a breeding programme and eventually, successfully, reintroduced to their natural habitats in the UK.

Explanation:

Touching a patient in an effort to evaluate chest abnormalities, tenderness, and tone of respiratory muscles is Palpation.

Palpation can be used both by screening technique & also for some particular diagnostics  

What is palpation ?

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just ask ur teacher she or he will tell u

When stearic acid is subjected to beta-oxidation, it passes through 8 cycles, creating 8 molecules of acetyl-CoA.

Each beta-oxidation cycle results in the production of acetyl-CoA, which may then enter citric acid cycle to create ATP. The number of beta-oxidation cycles necessary to thoroughly oxidise fatty acid accounts for a difference in ATP output among saturated and unsaturated fatty acids, such as stearic acid and linoleic acid with two double bonds. A saturated fatty acid containing 18 carbon atoms is called stearic acid. Stearic acid is subjected to beta-oxidation eight times, creating eight molecules of acetyl-CoA.

Each acetyl-CoA molecule in citric acid cycle may provide roughly ten ATP molecules, for a total of about 80 ATP molecules. Linoleic acid goes through nine cycles of beta-oxidation, yielding nine molecules. The ATP yield per beta-oxidation cycle is slightly lower than stearic acid because each double bond requires an extra step. Therefore, linoleic acid's beta-oxidation produces a slightly lower total ATP production than stearic acid's.

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