What are the four major functions all cells perform?

Answer:

In biology, a gene is a basic unit of heredity and a sequence of nucleotides in DNA or RNA that encodes the synthesis of a gene product, either RNA or protein. During gene expression, the DNA is first copied into RNA.

Euchromatin is a lightly packed form of chromatin that is enriched in genes, and is often under active transcription. Euchromatin comprises the most active portion of the genome within the cell nucleus. 92% of the human genome is euchromatic.

The genes present in heterochromatin are usually inactive. The genes present in euchromatin are either already active or will be active during growth. Heterochromatin is transcriptionally-inactive. Euchromatin is transcriptionally. (This one here is the difference)

Energy at the top of the food web , energy flow through the ecosystem Herbivores or primary consumers form the second level. At each step in the food chain, only 10 percent of the energy is passed on to the next level, while approximately 90 percent of the energy is lost as heat.

A food web is all the interactions between species within a community that involve the transfer of energy through consumption. A food web includes the various food chains in the environment. These types of interactions occur between producer and consumer and between predator and prey.

Energy transfer begins in plants. Plants are able to convert sunlight into a chemical form of energy through the process of photosynthesis. One of the end products of photosynthesis is glucose, a sugar in which energy is stored. Plants are called producers because they produce their own energy without consuming another organism.

Animals are called consumers; they must consume plants and other animals to obtain energy. Animals that feed only on plants are called herbivores or primary consumers because they eat the producers. Animals that feed on other animals are called carnivores. They are called secondary consumers if they eat primary consumers.

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A substance that triggers an immune response is called an antigen. When antigens are detected, they stimulate the immune system to respond by producing proteins called antibodies.

Antigens can be produced by the body itself or by foreign invaders such as viruses, bacteria, fungi, or parasites. Typically, an antigen is a molecule that can be recognized by the immune system as foreign or "non-self". This recognition leads to the activation of immune cells and the production of antibodies, which can bind specifically to the antigen and mark it for destruction.

In general, the immune system can respond to a wide range of antigens, but certain antigens are more potent than others in terms of triggering an immune response. For example, some pathogens are able to evade the immune system by producing antigens that are difficult to recognize or by mutating rapidly to escape detection. Overall, the immune system is a complex and dynamic system that plays a critical role in protecting the body against foreign invaders.

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Answer:ur mom l

Explanation:

True. Mitochondrial DNA (mt DNA) is present in multiple copies per cell, with each mitochondrion containing multiple copies of the mt DNA genome.

In contrast, nuclear DNA is present in only two copies per cell (one from each parent). Therefore, the total amount of mt DNA per cell is greater than the amount of nuclear DNA. This difference in abundance is due to the fact that mitochondria are responsible for producing energy (ATP) through oxidative phosphorylation, and therefore require a higher amount of genetic material to support their metabolic functions. The abundance of mt DNA per cell can vary depending on cell type and physiological state, and can be influenced by various factors, such as age, stress, and disease.

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Answer:

When organisms undertake sexual reproduction, new recombination of characteristics also appear in the progeny. Sometimes an organism may develop mutation in germ cells. In such cases, new characteristic may appear in progeny due to the mutation it has inherited

Explanation:

In photosynthesis conducted by plants, ATP is made by chemiosmosis.

Photosynthesis, the process by which plants convert sunlight into chemical energy, involves several interconnected steps. One of these steps is the production of ATP (adenosine triphosphate), a molecule that serves as the primary energy currency in cells. In photosynthesis, ATP is primarily synthesized through chemiosmosis.

Chemiosmosis is a process that occurs in the thylakoid membrane of the chloroplasts, where the light-dependent reactions of photosynthesis take place. During this process, light energy is absorbed by chlorophyll molecules, which excites electrons and initiates a series of electron transport chain reactions. As the excited electrons move through the electron transport chain, protons (H+) are pumped across the thylakoid membrane from the stroma to the lumen.

This creates an electrochemical gradient, with a higher concentration of protons in the thylakoid lumen compared to the stroma. The protons then flow back across the membrane through an enzyme complex called ATP synthase. As the protons pass through ATP synthase, the energy released drives the synthesis of ATP from ADP (adenosine diphosphate) and inorganic phosphate (Pi).

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The cell theory proves that new cells come from preexisting ones. Therefore option A is correct.

Louis Pasteur's experiments demonstrated that bacteria did not spontaneously generate within a flask but rather entered from the surrounding environment. This finding supported the concept of biogenesis, which is part of the cell theory.

The specific part of the cell theory that Pasteur's experiments proved is:

The concept of biogenesis states that living organisms arise from preexisting living organisms. Pasteur's experiments provided evidence against the idea of spontaneous generation, which suggested that living organisms could arise from non-living matter.

By showing that bacteria did not appear in a flask unless they were introduced from the surrounding environment, Pasteur supported the notion that new cells come from preexisting cells, rather than spontaneously generating.

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Answer: ok so the prosses of birth is kinda a science question and will be a hard answer. so it starts how it does and the sperm meets the egg and the baby starts to grow from there

Explanation:

A radioisotope is called a tracer when it is used to determine the path of an element in an organism. This is done by adding a small amount of the radioisotope to the organism, and then tracking its movement throughout the body using special imaging techniques.

Tracers can also be used to study metabolic processes and diagnose medical conditions, but they are not used to kill bacteria or cancerous tissue, nor are they used to determine the age of animal skeletal remains.

A radioisotope is called a tracer when it is used to determine the path of an element in an organism. Tracers are useful in tracking the movement and distribution of specific elements within a system, helping researchers gain insights into various biological processes.

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Answer:

Explanation:

4

The organs of the respiratory system:  Here are the names of the major organs in the respiratory system.

Nasal cavity: The space inside the nose that warms, humidifies, and filters the air before it enters the lungs.

Pharynx: The muscular tube that connects the nasal cavity and mouth to the larynx and esophagus.

Larynx: The structure at the top of the trachea that contains the vocal cords and helps regulate the flow of air into the lungs.

Trachea: The tube that carries air from the larynx to the bronchi in the lungs.

Bronchi: The two main branches of the trachea that lead to the lungs.

Bronchioles: The smaller branches of the bronchi that continue to divide and eventually lead to the alveoli.

Alveoli: The tiny air sacs in the lungs where gas exchange occurs between the air and blood.

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Answer:A and D

Explanation: trust me don’t put c

In the late 1980s, a dramatic increase in the abundance of wild lake trout decimated the salmon population. The salmon population declined the most in the late 1980s. Option A is the correct answer.

In an ecosystem, there are predators and prey. If the predator population grows, they will consume more prey more quickly, causing the prey population to decline rapidly. When there are more prey in an ecosystem, it would be advantageous for the predator, and after some time, the prey will decrease in number and the predator will increase.

Salmon, mouth bass, and lake trout feed on smelt in the lake. Lake trout populations increased in the late 1980s, and as a result, they began feeding on smelt. The other two predators were also affected. The salmon population declined for some time, but later their number increased too. The mouth bass population got affected a lot, and their number kept on declining. The other two species chose different prey and multiplied.

Hence, for some time, the salmon population declined. Option A is correct.

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Answer:

It is the portion of internal energy that can be transferred from one substance to another

Answer:

C.) It is the portion of internal energy that can be transferred from one substance to another.

Explanation:

E D G E N U I T Y

thermal energy: the part of total internal energy that can be transferred

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Brainliest?!?!

Arthropods are the most numerous animals on Earth and the traits which probably made the smallest contribution to their success is option E. Specialization of different appendages

Invertebrate creatures known as arthropods have a striated appearance, an exoskeleton, and paired jointed legs. The phylum Arthropoda is made up of arthropods. They can be identified by their joined limbs and chitin-based cuticle, which is frequently mineralized with calcium carbonate.

The arthropods' extraordinary adaptability and success is the reason for their great diversity. Arthropods may be found in almost every environment and niche on earth because to the evolution of a wide variety of appendages, including antennae, claws, wings, and mouthparts.

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Answer:

The functions of radicle are

a. it emerge from a seed through the micropyle.

b. it allows to suck water and send to the leaves to start photosynthesis.

c. it helps the seed to grow.e.t.c.

The main calcium reservoirs for the body are the bones and teeth. They store about 99% and a smaller amount of the body's calcium, respectively. Calcium is essential for maintaining the strength and integrity of bones and teeth.

Calcium is an essential mineral that is stored in the body to maintain its levels and ensure proper functioning of various tissues. The main calcium reservoirs in the body are the bones and teeth. Bones store about 99% of the body's calcium, while teeth store a smaller amount.

Calcium plays a crucial role in maintaining the strength and integrity of bones and teeth. It is necessary for bone formation, growth, and repair. When dietary intake of calcium is insufficient, the body can draw upon these reservoirs to maintain normal calcium levels in the blood and other tissues.

The body continuously remodels bone tissue, releasing and absorbing calcium as needed. This process is regulated by hormones such as parathyroid hormone and calcitonin. These hormones help maintain calcium homeostasis by stimulating bone resorption (release of calcium from bones) or bone formation (absorption of calcium into bones) depending on the body's needs.

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Answer:

Most humans cannot see ultraviolet light because it has a smaller wavelength than violet light, putting it outside of the visible spectrum.

\(hopethishelpsyou\)

Answer:

25 hours

Explanation:

Speed is a measure of the distance traveled by a body relative to the time taken to complete a trip or a journey. Mathematically, speed can be expressed as;

      speed = distance/time

Hence, time = distance/speed

The distance covering Dallas, Texas, to Salt Lake City, Utah is about 1500 miles and the speed limit is 60 mph, hence;

time = 1500/60

           = 25 hours

Therefore, the least amount of time that would be needed to cover the journey is 25 hours.

Answer:

25 hours is your answer

Explanation:

On the left, primary immunofluorescence depicts an antibody with a fluorophore group linked to it immediately attaching to the antigen epitope for which it is specific.

Immunofluorescence is a light microscopy method that uses a fluorescence microscope to examine biological material. This approach employs the specificity of antibodies to their antigen to direct fluorescent dyes to specific biomolecule targets within a cell, allowing observation of the target molecule's distribution throughout the sample.

An epitope is the particular portion of an antigen that an antibody recognizes.  Epitope mapping has been attempted because numerous antibodies can bind the same epitope and the degrees of binding amongst antibodies that identify the same epitope might vary.

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Answer:Polaris

Explanation: Nuclear Fusion

Answer:

Atoms i believe because atoms are the main base of everything

The molecular and energy products generated by aerobic respiration would be \(6CO_{2}\), 6\(H_{2}O\), an energy of 38 ATP and heat.

So, the correct option is B.

Adenosine triphosphate, a chemical compound that provides energy, is produced as a result of a series of enzyme-controlled chemical reactions in which oxygen reacts with glucose to produce carbon dioxide and water. When oxygen and glucose are combined during aerobic cellular respiration, ATP is created that the cell can use. There are byproducts of carbon dioxide and water. Cellular respiration is an aerobic process in which glucose and oxygen combine to create ATP.

In the second and third stages of the aerobic energy system, the breakdown of glucose that was begun by aerobic glycolysis is continued, producing the byproducts carbon dioxide and water, as well as the synthesis of additional ATP.

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Answer:

red blood

Explanation:

hope this helps

Answer:

Human cells make up only 43% of the body's total cell count. The rest are microscopic colonists. ... "That's been refined much closer to one-to-one, so the current estimate is you're about 43% human if you're counting up all the cells," he says.

Explanation:

Please pick me as brainlist!!

Mika's aunt is likely to share information about the baby's development and important precautions (option B) during her dinner conversations.

As she is taking a course and reading books on pregnancy, she will have a wealth of knowledge to share with Mika and his family. However, it is highly unlikely that she would mention her doctor telling her it's okay to drink alcohol during the first trimester, as this is contrary to the medical advice that pregnant women should avoid alcohol to prevent potential harm to the developing fetus.

Instead, Mika's aunt might discuss the baby's growth stages, such as the formation of vital organs, limbs, and facial features. She could also talk about the changes her body is experiencing and the importance of prenatal care, including regular check-ups, a healthy diet, and exercise. Additionally, she may mention common pregnancy-related topics such as morning sickness, prenatal vitamins, and preparing for the baby's arrival. These conversations will help Mika and his family gain a better understanding of pregnancy and the development of the baby inside the uterus.

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Full question is:

Mika has learned that his aunt Is pregnant with her first child. His aunt is taking a course about pregnancy and reading books on the topic to become knowledgeable about the development of the baby. About once a week, Mika's aunt comes over for dinner, and his family discusses how the fetus is developing Inside the uterus. During her pregnancy term, which would Mika's aunt Include in her dinner conversations?

A) Her doctor told her that she could drink alcohol during the first trimester.

B) Mika's aunt is likely to share information about the baby's development and important precautions

C) Her doctor told her that she could drink throughout her pregnancy

D) The doctor did not advise her aunt on any issues

Answer:

The salivary glands, liver and gall bladder, and the pancreas aid the processes of ingestion, digestion, and absorption. These accessory organs of digestion play key roles in the digestive process. Each of these organs either secretes or stores substances that pass through ducts into the alimentary canal.

Accessory organs are needed for digestion to succeed because they secrete enzymes and other substances that aid in the breakdown of food.

These organs include the liver, pancreas, and gallbladder, which play important roles in the digestion of carbohydrates, proteins, and fats. Below are the details of each organ and their importance in digestion:Liver: The liver produces bile, which is a substance that helps break down fats. Bile is stored in the gallbladder until it is needed in the small intestine for the digestion of fats.

Pancreas: The pancreas secretes digestive enzymes that help break down carbohydrates, proteins, and fats. These enzymes are released into the small intestine. Gallbladder: The gallbladder stores bile produced by the liver until it is needed in the small intestine for the digestion of fats.

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Intelligence is completely is partially hereditary, but inherited from one's parent. The statement is false. As 50 % of intelligence inherited from parents while rest are passed from the influence of other factor.

The study of heredity is covered by Genetics. A gene code for a specific trait of heredity.

This gene is found on a chromosome in eukaryotic nuclei.

The method in which an offspring acquires half genetic characteristics from its parent cell as the genome of offspring are not identical to their parent genome.

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Answer:

snails move slow

Explanation:

abs

Answer:

Adenosine triphosphate

Explanation:

Adenosine triphosphate (ATP) is the source of energy for use and storage at the cellular level.