Which of the following is NOT a source of water pollution?

discharges of sediment

industry waste

city sewage

none of the above

internodes

im 100% sure

Answer:

The population will have more possible adaptions. ///APEX

Explanation:

Answer:

No, because straw is Cylinder shaped

Explanation:

Final answer:

Cooked foods undergo denaturation of DNA and other cellular components due to high temperatures, causing DNA molecules to separate and degrade, which renders them unusable for DNA extraction and subsequent analysis.

Explanation:

It would be impossible to extract DNA from cooked foods primarily due to the denaturation of DNA that occurs during the cooking process. When food is cooked, the high temperatures cause the DNA molecules to denature, which means the double-stranded structure of the DNA is disrupted, resulting in the separation of the two strands. Additionally, the physical and chemical structure of the surrounding proteins and other cellular components also change, usually resulting in their irreversible denaturation and aggregation. This denaturation and aggregation can lead to the shearing of DNA into shorter, often unusable fragments.

For recombinant DNA procedures to be successful, a pure DNA sample must be obtained. However, cooking can cause not only DNA but also other cellular components to degrade or alter in such a way that they cannot be isolated without significant contamination, if at all. Proteins, which play a critical role in the cell, lose their characteristic three-dimensional structure when cooked and can no longer perform their biological functions. This protein denaturation also contributes to the destruction of any potential microbial contaminants.

Cooking can also result in the breakdown and cross-linking of other essential molecules that can interfere with obtaining a clean DNA sample. Therefore, due to these significant alterations in the molecular composition induced by high temperatures, extracting intact and functional DNA from cooked foods is impractical and often impossible.

Oily or fatty substances that prevent moisture loss from the skin are sebum, containing lipids and fatty acids, natural esters in fats and oils acting as a barrier, and unsaturated fats or oils rich in unsaturated fatty acids.

Oily or fatty ingredients that prevent moisture from leaving the skin are sebum, which is produced by sebaceous glands in the skin. Sebum is composed of lipids and fatty acids that create a barrier on the skin's surface to prevent water loss and inhibit microbial growth. Furthermore, on the skin's surface, the fatty acids create a dry, salty, and acidic environment that is resistant to breakdown by enzymes.

Moreover, substances like esters form the essential ingredients of natural fats and oils. They are the result of the reaction between carboxylic acids (such as palmitic acid, stearic acid, and oleic acid) and trihydroxyl alcohol, glycerine. Esters are also found in oily substances that provide a barrier that prevents the skin from losing moisture.

Lastly, unsaturated fats or oils, rich in unsaturated fatty acids, commonly found in plant origin, also play a significant role in retaining moisture in the skin. Known examples are olive oil, corn oil, and canola oil, which are liquid at room temperature due to the bend or 'kink' in their fatty acid chains which prevents tight packaging.

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Answer:

Option A

Explanation:

The DNA structure of these species i.e Eubacteria and Archaea differ from each other.

The DNA of an archae is called as plasmid which is nothing but the single DNA loop while a  Eubacteria  (like all prokrayotes) consists of genome made up of single, double-stranded DNA molecule. The region that comprise of this genetic material is known as nucleoid. The bacterial chromosome has several proteins and RNA molecules on it

Both arcahe and eubacteria have cellwall and hence they are able to survive in extreme climatic conditions.

Archae has DNA while Eubacteria has both DNA and RNA

Both Archae and Eubacteria are prokaryotes, therefore they do not have membrane-bound nucleus

Hence, option A is correct

Biology teachers aid students in encoding long-term memory of cell components by conveying the significance of the plasma membrane, cytoplasm, and nucleus, which are integral to cellular function.

A biology teacher aims to help students remember the various components of a cell including the nucleus, cytoplasm, and cell membrane. To enhance long-term memory storage, it's crucial to understand that cells are the fundamental units of life. Every cell has a plasma membrane, which acts as a barrier and regulator for substances entering and exiting the cell. Inside the cell, the cytoplasm is a gel-like substance where cellular activities occur, and it houses organelles such as ribosomes responsible for protein synthesis. The nucleus, often considered the 'command centre' of the cell, contains DNA, which is the genetic blueprint for the cell's function and production of materials.

A neuron receives information through its dendrites, which then gets passed along the cell body and propagates down the axon. The axon transmits this information towards a target, such as another neuron, muscle tissue, or gland. This flow of information, or electric signals, follows the polarity of the neuron.

Information is received by a neuron through the dendrites and is transmitted toward other neurons through the axon. Dendrites are the thin extensions branching off the neuron, acting as the receivers of the information. Once they collect this information, it's passed along the cell body and propagates along the axon towards the target, which may be another neuron, muscle tissue, or gland.

Axons, often insulated by a lipid-rich substance called myelin, function as the transmitters, sending the signals to other neurons. The actual transmission happens through a gap between nerve cells, known as the synapse, where chemical compounds known as neurotransmitters cross to stimulate the next neuron or target. The flow of these signals and transmissions follows the polarity of the neuron, from dendrites and cell bodies towards the axon.

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Answer:

Forehead

Explanation:

Answer:

Technology used by my parent(s) or caregivers  to take care of me are

Phone

CCTV Cameras

Smart machines and equipment

Explanation:

Technology 1

When I was a kid , my parents have kept a care tacker to handle me while they go for working. With the help of technology like phone enabled CCTV cameras, my mother used to keep a watch on me and my care giver.

Technology 2

My parents use fast, instruction based and smart  equipment's in kitchen and for other household so that all work can be done automatically once the instructions are given to them. Thus , My work in kitchen or any other place reduces to hell lot of extent because of technology used by my parents

Answer:

She will find it by looking for the presence of the germ layers and the primitive gut in the embryo

Explanation:

If she wants to see the gastrula she must know that it is formed by

the gastrulation process. This is the process by which the embryo acquires three germ layers (ectoderm, mesoderm and endoderm) and acquires an axial orientation. Germ cells are formed from the migration of mobile populations. Anne would observe the primitive gut cavity becaue it is the endoderm and forms the rudiment of the animal’s future gut and many of its associated digestive organs and glands.

Answer:

Option B, Submucosa, because this layer absorbs nutrients from the bloodstream

Explanation:

If a person is eating regularly then it is pretty much sure there is no case of “eating less food” that could have caused malnutrition. Hence, the problem of malnutrition has occurred due to some functional issues such lack of proper exchange of food resources through the alimentary canal.  

The sub-mucosal layer of alimentary canal is responsible for sharing the food nutrient by pouring it in blood.  

Thus, option B is correct.

A concentration gradient across a membrane represents potential energy because it reflects the difference in the concentration of ions or molecules on either side of the membrane.

Because of this gradient, there is a chance that the chemicals will diffuse from a region of higher concentration to one of lower concentration.

When the gradient is employed to promote movement, the potential energy that is stored there can be used to carry out tasks like propelling biological processes or moving materials over the membrane.

Lipids are not soluble in polar solvents and include a variety of substances such as waxes, fats, oils, hormones etc.

Keywords: Bio-molecules, lipids, properties of lipids, function of lipids.

Level: High school  

Subject: Biology  

Topic: Macro-molecules

Sub-topic: Lipids

The cochlea is the portion of the ear responsible for sound transduction.

The portion of the ear responsible for sound transduction is the cochlea. The cochlea is a spiral-shaped, fluid-filled structure that converts sound vibrations into electrical signals that can be interpreted by the brain. It contains specialized cells called hair cells which are responsible for this transduction process.

The cochlea is a spiral-shaped, fluid-filled structure in the inner ear responsible for the conversion of sound vibrations into neural signals that can be interpreted by the brain. It contains specialized hair cells that detect different frequencies of sound and send signals to the brain via the auditory nerve. This process is essential for our ability to hear and perceive sounds.

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The answer to this question is both a and b (Sepals and petals). The sterile parts of the flower are Sepals and petals. Sepals are located in the lower part of the flower which protects the flower from drying. When sepals are still closed it is referred to as a bud. Petals are the part of the flower that has a distinctive color and brings out scent.      

Albumin is the most abundant protein in the body, performing key functions like transporting hormones and fatty acids, buffering pH, and maintaining osmotic pressures. Proteins, made up of amino acids in a linear sequence, are abundant in living systems and perform a wide range of functions.

The single most abundant protein in the body is albumin. This protein accounts for most of the osmotic pressure of plasma and is the most abundant plasma protein. It is synthesized in the liver and constitutes about half of the blood serum protein. Albumin performs a variety of vital functions such as transporting hormones and fatty acids, buffering pH, and maintaining osmotic pressures in the body.

Proteins in general are one of the most abundant organic molecules in living systems, displaying a diverse range of functions. These can include structural, regulatory, contractile, and protective roles, or serving in transport, storage, or membranes. Proteins may also function as toxins or enzymes. Irrespective of their function, all proteins are polymers of amino acids arranged in a linear sequence.

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