Mutations can cause variations in organisms. How does this happen?

Question 6 options:

The DNA is copied and then divided.


The DNA is changed in some way.


The DNA is modified by a scientist in a lab.


The DNA double-helix splits open and replicates.

The stomach is the sac-shaped part of the gastrointestinal tract. The stomach wall has folds that open when the stomach is full to store swallowed food. Digestion of food in the stomach is done by gastric juice and its movements. At the end of digestion in the stomach is a digestive mixture called chyme

Oral birth control medications bind to cell receptors in the pituitary to prevent the release of hormones that stimulate ovulation. Therefore option (B) is correct.

Signal transduction is the process by which cells communicate with each other and respond to their environment. It involves the transmission of molecular signals from the extracellular environment to the interior of the cell, where they trigger a chain of biochemical events that ultimately result in a cellular response.

This process can involve a variety of molecules such as hormones, growth factors, neurotransmitters, and cytokines. Signal transduction is critical for many cellular processes including cell growth and differentiation, apoptosis, immune response, and homeostasis. Dysregulation of signal transduction can lead to a variety of diseases such as cancer, autoimmune disorders, and metabolic disorders.

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Explanation:

The tongue is defined as a muscular organ, present in mouth that helps in mastication and swallowing of food. ... The front part of the tongue is narrow and thin whereas the back part of the tongue is wide.

Answer:

Option D

Explanation:

An experiment can be described as a procedure to make a particular discovery, it tests the smoothies made. Thus, in this case, putting plants in a totally dark place and controlling when the lights come on is the experiment carried out.

This puts to the test, the hypothesis about the blooming time of flowers.

Answer:

A

Explanation:

myths and superstitions do not qualify for scientific study

The one that is not a question of scientific study is "If ghosts are real, how do they move?", the correct option is A.

Scientific research entails scientific theory, scientific models, experiments, and physical situations.

It may refer to Scientific method, a set of techniques for investigating phenomena based on empirical or measurable evidence and subject to logic and reasoning principles.

Scientific research is essential for navigating our ever-changing world. We would have to rely on people's opinions, our intuitions, and luck without it.

Because scientific knowledge is founded on objective, tangible evidence, systematic scientific research provides us with an objective understanding.

A research question is a question that is intended to be answered by a study or research project.

As in the question "If ghosts are real, how do they move?" there is no sense of getting a scientific study for this as this can be a myth or based on mythological aspects, so cannot be considered as a scientific question.

Thus, the correct option is A.

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Those messages are sent to the hand using sensory neurons.

Axons are long single fibers that carry messages from the cell body to the dendrites of other neurons or other body tissues such as muscle. In muscles, this electrical message causes them to contract or shorten. Think of catching a ball. The brain tells neurons to send electrical signals to the neuromuscular junction. This releases neurotransmitters into your finger muscles, which contract to catch the ball.

Motor neurons release chemicals that are taken up by muscle fibers. This causes the muscle fibers to contract and the muscle to move. Neurons carry messages from the brain through the spinal cord. These messages are sent to the muscles, directing muscle fibers to contract and causing the muscles to move. Neurons that are sending signals release chemicals called neurotransmitters. This chemical binds to receptors on the surface of receiving neurons.

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Answer:

Tissues are groups of cells that work together to perform a specific function. The structure of tissues can vary depending on their function, but there are some general features that are common to many tissues.

Answer:

it is considered non-competitive mainly because the inhibitor does no resemble the substrate that is ae to fit into the active site so it binds to the allosteric site, if it bonds to the active site then it has competition from actual substrates to fit in the active site

Explanation:

and from the metabolic pathway, we know that most likely the size of molecule A is greater than that of E since A has to be broken down through several reactions before E is produced, from this we would know that E would not resemble the structure or size of A and hence would not be able to fit in the active site of the enzyme that catalyzed A to B. From this we can deduct that the only possible thing would have been that it inhibited the allosteric site and is therefore non- competitive

Answer: Starch (made by plants) and glycogen (made by animals) are both polysaccharides made up entirely of glucose subunits. Starch and glycogen function as storage polysaccharides, because excess fuel (glucose) is stored within the polysaccharide for later use as fuel.

Explanation:

Answer:

I do not understand.Please explain

The process that involves coding is called transcription. The correct option is b.

The process of transcription creates RNA from DNA using the non-coding strand of the DNA as a template. The resulting RNA is a replica of the coding strand of the DNA.

Proteins called transcription factors to help turn particular genes "on" or "off" by attaching to surrounding DNA. The transcription of a gene is increased by transcription factors known as activators, while the transcription of genes is decreased by repressors.

Therefore, the correct option is B. transcription.

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Answer:

d - the nucleus

I hope it helps......

c - the plasma membrane

The plasma membrane is barrier between the outside and the inside of the cell

Explanation:

Euglena and Trypanosoma are placed in different classes because they belong to different taxonomic groups based on their distinct characteristics, evolutionary relationships, and overall organization. The classification of organisms is determined by their shared similarities and differences, allowing scientists to group them into various hierarchical categories.

Euglena and Trypanosoma belong to different classes due to the following reasons:

1. Morphological Differences: Euglena is a unicellular, freshwater protist that possesses a characteristic whip-like tail called a flagellum, allowing it to move and propel itself. It also contains a photosynthetic pigment called chlorophyll, enabling it to perform photosynthesis. On the other hand, Trypanosoma is a parasitic protist that causes diseases such as African sleeping sickness and Chagas disease. It possesses a single flagellum but lacks chlorophyll and cannot perform photosynthesis.

2. Evolutionary Relationships: Classification takes into account the evolutionary relationships between organisms. Euglena belongs to the class Euglenophyceae, which includes various species of photosynthetic protists. They are considered to be a diverse group that originated from a common ancestor. Trypanosoma, however, belongs to the class Kinetoplastea, which includes various parasitic flagellates. These organisms are not closely related to Euglena, indicating a distinct evolutionary history.

3. Biochemical and Genetic Differences: Euglena and Trypanosoma also differ biochemically and genetically. They have distinct cellular structures, metabolic pathways, and genetic compositions that contribute to their unique characteristics and lifestyles. These differences further support their classification into separate classes.

By considering these factors, taxonomists and scientists classify organisms into appropriate hierarchical categories, ensuring that organisms with shared characteristics are grouped together while differentiating them from organisms with distinct features. The placement of Euglena and Trypanosoma in different classes reflects their distinct biological attributes and evolutionary histories.

Answer:

Explanation:

Euglena and Trypanosoma are both unicellular organisms that belong to the kingdom Protista, but they are placed in different classes because they have different characteristics and lifestyles. Euglena is a photosynthetic organism that can produce its own food using sunlight, and it has a structure called a chloroplast that contains pigments such as chlorophyll. It also has a flagellum, which it uses to move around in its aquatic environment. Euglena belongs to the class Euglenophyceae, which includes other photosynthetic unicellular organisms that have similar characteristics. On the other hand, Trypanosoma is a parasitic organism that feeds on the blood of its host, and it does not have the capability to photosynthesize. It moves by using a single flagellum and has a unique structure called a kinetoplast, which contains DNA and other important cellular components. Trypanosoma belongs to the class Kinetoplastea, which includes other parasitic unicellular organisms that have similar characteristics. Therefore, Euglena and Trypanosoma are placed in different classes based on their different modes of nutrition, locomotion, and other morphological and physiological characteristics.  

Answer:

attached is the correct answer

Answer:

The water vapor content in the atmosphere is typically recorded using a measurement called relative humidity, which represents the amount of water vapor present in the air relative to the maximum amount the air could hold at a given temperature. Therefore, if two locations have different water vapor content in the atmosphere, it is likely that they would have different relative humidity readings.

For example, if one location has a higher water vapor content in the air, it would have a higher relative humidity measurement than a location with a lower water vapor content. Conversely, if one location has a lower water vapor content in the air, it would have a lower relative humidity measurement than a location with a higher water vapor content.

It is important to note that other factors can also influence relative humidity measurements, such as temperature and atmospheric pressure, so a direct comparison of relative humidity readings between two locations should take these factors into account.

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The type of sugar containing residual syrup due to less filtration and purification during processing is called is known as brown sugar.

In general ,Brown sugar is termed as the common sweetener which are commonly used in many foods and beverages, they are composed of mainly white sugar with molasses, which is a thick, dark syrup that is a byproduct of sugar production.

Also, is quality is dependent on the type of molasses mixed with the white sugar determines the darkness and moisture content of the resulting brown sugar. Brown sugar has a slightly different flavor profile than white sugar due to the presence of the molasses, and it is often used in baking to add moisture and a slightly caramel flavor to baked goods.

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Solute is the substance that dissolves

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Answer:

Global warming 100%  one of them.  And Air pollution.

Explanation:

Good luck

The spinal cord is protected by discs, ligaments, muscles, bones, and vertebra. These structures surround the spinal cord protecting from mechanical impacts.

Answer:There are two types of nutrients in the world. One of them is micronutrients and the other nutrient is macronutrients. These nutrients and vitamins help humans to develop the human body and help to make the immune systems.

The human body consists of 70% of the water and 30% of the rest of the substance. The cell consists of carbohydrates, fat, and protein.

The water is required by the body in various reactions. The water is required by the different enzyme formations, the water is required for the osmoregulation of the body fluids.

According to the question, the correction option is C that is It assists organisms in obtaining certain dissolvable substances.

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Explanation:

Answer:

binary fission

Explanation:

Answer:

dogs

Explanation:

Answer:The lipid bilayer

Explanation: it is a type of membrane that separates the cell from the environment and is made of two layers of phospholipids. Also known as the phospholipid bilayer, 

Answer:

:the natural process of bone formation.