By motivating us to satisfy our physical needs, hunger and thirst serve to:
a. raise the set point.
b. maintain homeostasis.
c. lower sex hormone levels.
d. shorten the refractory period.

Answer:

Air inside the guard hairs traps heat close to the body, keeping the reindeer warm even in the frigid, windy temperatures of the tundra. The guard hairs also prevent body heat from escaping and melting the snow if the reindeer lies down, keeping it from getting wet and cold.

Answer:

Hidden virus.

Explanation:

It will sit in the cell's DNA for a while and then attack.

Answer:

B. the hormone must enter the cell

Answer:

A: The hormone must attach to the cell's receptor.

A chromosome is made up of two chromatids.

One of the two identical chromosomal structures that have formerly experienced replication is called a chromatid. A chromosome with two chromatids is appertained to as Making sure that each of the two new cells receives a complete, accurate dupe of the inheritable material is one of a cell's crucial tasks when it divides. Cells that are sick or imperfect can affect from crimes made during copying or an uneven division of the inheritable material between cells. The DNA of a cell is housed in chromosomes. In the primary stage of cell division, the DNA of the cell is duplicated( interphase). At least one chromosome is duplicated during meiosis and mitosis. The DNA set up in the chromosomes is extremely compressed.

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A chromosome is made up of two chromatids.

A chromatid is one of the two identical chromosomal structures that have previously undergone replication. Two chromatids on a chromosome are referred to as One of a cell's key jobs during division is to ensure that each of the two new cells receives a full, correct copy of the inheritable material. Incorrect distribution of the inheritable material across cells or crimes committed while copying can both result in sick or flawed cells. Chromosomes hold the DNA of a cell. The DNA of the cell is replicated during the initial stage of cell division ( interphase). Meiosis and mitosis both result in the duplication of at least one chromosome. The way that DNA is organized in chromosomes is quite compacted.

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Organisms possess specialized structures for efficient oxygen utilization. Gills in aquatic organisms, lungs in terrestrial vertebrates, and tracheal systems in insects enable oxygen exchange. Birds have lungs and air sacs for efficient respiration. Hemoglobin in red blood cells transports oxygen. These adaptations optimize oxygen utilization for survival.

Structures in organisms that are well-adapted for efficient oxygen utilization include:

These structures and adaptations are examples of how organisms have evolved to maximize their oxygen utilization, allowing them to thrive in their respective environments.

Answer: Here's 4 so you can choose

How many stars are in space?

How far away from Earth are certain stars?

Are there other planets like Earth?

Could a large meteor ever strike Earth

Explanation:

The length of EG in triangle EDG is 26.

According to the triangle angle bisector theorem the line that divides a corner of a triangle into two equal parts will have the ratio of the side divided by the line to the other sides of the triangle.

GF ÷ FE = DG ÷ DE

(x + 10) ÷ x = 54 ÷ 24

(x + 10) ÷ x = 9 ÷ 4

9x = 4 × (x + 10)

9x = 4x + 40

9x - 4x = 40

5x = 40

x = 40 ÷ 5

x = 8

EG = EF + FG

EG = x + x + 10

EG = 8 + 8 + 10

EG = 26

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The Agent-Host-Environment model is most useful in examining the cause of disease in an individual, based upon external factors.

They usually come with symptoms and affects the structure and functions of cells of the body.

The Agent-Host-Environment model helps in examining the cause of diseases as a result of external factors such as the agent which are mainly pathogenic micro-organisms.

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An intron is a portion of mRNA that is about 1,000 nucleotides long and that is removed before translation.

In eukaryotic cells such as photoreceptors, expression of genes is frequently regulated mainly at the level of transcription.

When a eukaryotic gene is transcribed in the nucleus, the primary transcript i.e. newly made RNA molecule is, not so far, regarded a mRNA or messenger RNA. Rather, it is a premature molecule termed as a pre-mRNA.

Maximum pre-mRNA molecules contain segments which are separated from the molecule i.e. introns, as well as portions that are connected together to create the ultimate mRNA i.e. exons. This process is known as splicing.

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This is because a variety of components must be integrated in order to accurately interpret and respond to the signal in a timely and effective manner.

The first step in this process is for the signal to be received and interpreted by the cell. This involves the binding of the signal molecule to a specific receptor, which triggers a cascade of cellular responses. This involves the activation of certain proteins, which then act as mediators of the signal within the cell and help to direct the response.

Once the signal has been received and interpreted, it must then be transmitted to the target organelle or region of the cell. This is done by a variety of molecules such as hormones, neurotransmitters, and growth factors. These molecules are released from the cell and travel to their target where they bind to specific receptors. This triggers a series of responses in the target organelle or region.

Finally, the cell must respond appropriately to the signal. This involves the activation of specific genes, which then produce proteins that alter the cells physiology and behavior. This is a process of gene expression that is tightly regulated and allows the cell to respond rapidly and accurately to the signal.

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the answer should be D

The burning of biomass, such as wood, is an example of (b) indirect use of solar energy. It was converted from solar energy to chemical energy by the process of photosynthesis.

Solar energy is radiant light and heat energy generated by the sun. Solar energy is the cleanest and most abundant and renewable energy resource available in the world. This is why people today think about using solar energy as a great preference.

Solar energy can be converted to chemical energy by the process of photosynthesis. This is the initial process in resulting the burning of biomass. The energy then will be stored as chemical energy in plant tissues or animal waste products.

Thus, the burning of biomass is an example of indirect use of solar energy. This is also known as one of the oldest fuels to human.

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Answer:

A.The continent on which the tropical plants lived changed latitudes over time.

Explanation:

When the Fossils of tropical plants should have found so this explained that the continent where the tropical plants lived changed latitudes over the time. hence, the option A is correct.

Mainly it should be found in the Svalbard which is situated in the Arctic Ocean. But at the same time it should be found in the Earth's polar regions.

And, it explained the continent where the tropical plants should be lived also it changed the latitudes over time.

Hence, When the Fossils of tropical plants should have found so this explained that the continent where the tropical plants lived changed latitudes over the time. hence, the option A is correct.

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The simulation of a chemical reaction does support the scientific law of conversation of mass that states that matter can neither be created nor destroyed but it can change from one form to another.

The scientific law of conservation of mass states that matter can neither be created nor destroyed but it can change from one form to another. This means that the mass of the reactants and the products must be the same, i.e., mass cannot be lost or gained.

For example, when the wood is burned, the products formed are ash, water vapour, and carbon dioxide. The mass of the ash, water vapour, and carbon dioxide formed during the combustion of wood is the same as the mass of the wood that was burned.

The simulation of a chemical reaction supports this scientific law as it has been observed that the mass of the reactants in a chemical reaction is equal to the mass of the products formed during the chemical reaction. Even if the products appear to have a different mass than the reactants, it is only because the mass has changed from one form to another, and not because the mass has been destroyed or created.

For instance, in the process of rusting, iron and oxygen react to form rust, which is hydrated iron(III) oxide. The mass of the iron and oxygen involved in the chemical reaction is equal to the mass of the rust formed. In conclusion, the scientific law of the conversation of mass states that matter can neither be created nor destroyed but it can change from one form to another, which is supported by the simulation of a chemical reaction.

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Answer:I’m stuck on the same question

Explanation:

Answer:

Photosynthesis produces: glucose and \(O_{2}\)

                 ...from  \(CO_{2}\), energy (light) and \(H_{2} O\)

Respiration produces: energy (ATP),\(CO_{2}, H_{2} O\)  

                ....from glucose and  \(O_{2}\)

Explanation:

These end products, namely \(O_{2}\) and glucose are then used in respiration...

Using energy in the form of solar energy, plants, phytoplankton, algae, and other microorganisms produce chemical energy via photosynthesis. This complex mechanism is central to these species.

They combine light energy from the sun, water, and carbon dioxide.

6\(CO_{2}\) + 6\(H_{2} O\) + (energy) →\(C_{6} H_{12} O_{6}\) + 6\(O_{2}\)

In the mechanism of cellular respiration, organisms extract energy from food. Sugars in the form of glucose are broken down into carbon dioxide and water during aerobic respiration in mitochondria to produce energy in the form of ATP (adenosine triphosphate).

The waste products, \(CO_{2}\) and \(H_{2} O\),  result from respiration, these are used as reactants in the photosynthetic process. In turn, its products are the reactants \(O_{2}\)  and \(C_{6} H_{12} O_{6}\) in respiration.

a. Floppy plant cell: missing or dysfunctional cell wall structure.

b. Excess glucose: malfunctioning cell membrane regulating glucose transport.

c. Accumulating wastes: absent or faulty lysosomes for waste digestion.

d. Slow osmosis: impaired or lacking cell membrane permeability.

e. No molecule movement: dysfunctional nuclear pore complex restricting transport.

f. Protein production failure: absent or nonfunctional ribosomes in prokaryotic.

g. Protein modification failure: defective or missing Golgi apparatus for processing.

a. In a plant cell that is floppy even with sufficient water, the cell part that could be missing or not functioning properly is the cell wall. The cell wall provides structural support and rigidity to plant cells.

b. In an animal cell that contains more glucose than normal, the cell part that could be missing or not functioning properly is the cell membrane or plasma membrane. The cell membrane regulates the movement of substances in and out of the cell.

c. In a cell that accumulates waste, the cell part that could be missing or not functioning properly is the lysosome. Lysosomes are responsible for the digestion and breakdown of cellular waste materials.

d. In a cell that accomplishes osmosis only very slowly, the cell part that could be missing or not functioning properly is the cell membrane or plasma membrane. The cell membrane regulates the movement of water and solutes across the cell.

e. In a situation where molecules do not pass into or out of the nucleus, the cell part that could be missing or not functioning properly is the nuclear pore complex. Nuclear pore complexes are responsible for controlling the transport of molecules, including RNA and proteins, between the nucleus and the cytoplasm.

f. In a prokaryote that fails to produce proteins, the cell part that could be missing or not functioning properly is the ribosome. Ribosomes are responsible for protein synthesis in both prokaryotic and eukaryotic cells.

g. In a cell that fails to modify and transport proteins, the cell part that could be missing or not functioning properly is the Golgi apparatus. The Golgi apparatus is involved in modifying, sorting, and packaging proteins for transport to their final destinations within the cell or for secretion outside the cell.

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Explanation:

Glyphosate is being banned because of its potential link to cancer in humans, as well as potentially causing the death of important insects, such as bees. ... In addition, scientists warn that these glyphosate and other similar products damage ecosystems by disrupting the natural food chains and plant pollination.

The black, heavy-coated dog absorbs more heat due to its color, losing heat primarily through panting, radiation, and conduction. The white dog reflects heat and loses heat through panting, radiation, and evaporation, but not through conduction.

Dogs are among the most efficient creatures at dissipating heat, but they can easily overheat when exposed to high temperatures. A black, heavy-coated dog and a white dog sitting on the grass in the sun on a hot day are both trying to regulate their body temperatures by gaining and losing heat.

Compare and contrast the various ways in which the two dogs are gaining and losing heat (being careful to use the correct terminology): Black, heavy-coated dog: On a hot day, the black heavy-coated dog is at a disadvantage when it comes to keeping cool.

Since black coats absorb more heat than white coats, the dog is absorbing more heat from the sun's rays. As a result, they tend to lose heat primarily through panting, which is the most important way for dogs to get rid of excess heat. Panting causes water to evaporate from their tongues, reducing their body temperature.

The black dog loses heat through radiation, which is the transfer of heat from one object to another without the need for a medium. When the dog sits on the grass, heat flows from the dog's body to the grass, reducing the dog's temperature.

The black dog is also losing heat by conduction, which is the transfer of heat through direct contact between two objects. White dog: White coats, on the other hand, reflect heat and sunlight, making it easier for the white dog to regulate its body temperature. Panting is also the primary method of heat loss for white dogs.

Because panting releases moisture, the dog will also lose some heat via evaporation. Radiation, like in the case of the black dog, is also a way that the white dog loses heat when it is sitting on the grass.

The white dog is not, however, losing heat by conduction, which is the transfer of heat through direct contact between two objects, since it is not in contact with any surface that is cooler than its body temperature. Therefore, the white dog may not be losing heat as effectively as the black dog, since it is not losing heat through conduction.

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All glycerol-containing phospholipids are synthesised from: E) phosphatidic acid.

Phosphatidic acid is the precursor for the synthesis of glycerol-containing phospholipids. These phospholipids, which include cardiolipin, are important components of cell membranes and play vital roles in cellular processes. Phospholipids are the major constituent of the cell membranes of the cells found in the human beings. Phospholipids contain phosphate group and lipids.

The simplest (diacyl) glycerophospholipid found in cells is phosphatidic acid, which has established itself as a second messenger with clear biological implications. It plays a significant function in membrane fluidity and cellular signalling in all eukaryotes and is specially recognised by a variety of proteins.

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Answer:

True

Explanation:

Competition limits population size. Imagine 7 animals fighting over 2 meals. This creates competition and some will not be fed.

Greta Thunberg's remark serves as a reminder that humanity must make a crucial choice regarding the future living conditions for all species. The escalating transmission of diseases like dengue due to global warming demands immediate action. We have the power to shape a sustainable future and prioritize the well-being of all living beings. It is our responsibility to act decisively, mitigating the effects of climate change and safeguarding the planet for generations to come. Together, we can create a path that fosters a harmonious coexistence for all species.

Similarly, the incidence of dengue transmission has been escalating due to the alarming effects of global warming. Unusual changes in temperature have led to the proliferation of various disease-carrying vectors, such as mosquitoes, that were previously uncommon in this region. This, in turn, has raised concerns about the geographic spread of vector-borne infectious diseases, which are expected to expand as global heat and humidity levels rise.

At this critical juncture, humanity faces a pivotal choice. Greta Thunberg, a prominent environmental activist, highlights the urgency of the situation and calls upon us to consider the consequences of our actions. The future living conditions for all species hang in the balance, and our decisions today will profoundly impact life on Earth. We have the power to shape a future that prioritizes sustainability and the well-being of all living beings, or one that perpetuates the harm caused by climate change. It is our responsibility to act decisively, implementing measures to mitigate global warming and safeguard the planet for generations to come. Together, we can forge a path towards a sustainable and harmonious coexistence for all living species.

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Answer:

Meat is easier to digest than plant materials

Explanation:

Plant material, such as cellulose, is often tough and challenging to digest. This would mean having complex stomaches would be a favorable digestive system for all herbivores. Carnivores do not need such intricate stomachs, as meat is easier to digest.

Answer: THE ANSWER IS A

Explanation: just did a test on it

One way in which the temperature in the above investigation can be changed is by adjusting the environmental conditions in which the water plant is kept.

Temperature can be controlled by altering the surroundings or using temperature-regulating equipment. For instance, the experiment could be conducted in a controlled environment such as a laboratory or a growth chamber where the temperature can be precisely set and maintained.

By adjusting the temperature, the investigation can observe the effects of different temperature levels on the growth, development, or physiological processes of the water plant. This allows for the study of temperature-dependent responses and how they may influence the plant's overall performance.

It's important to note that the specific details of the investigation and the table provided are not mentioned, so the explanation regarding the results of the investigation cannot be provided based on the given information.

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Answer:

Gibberellin

Explanation:

I've studied that gibberellin is a plant hormone that promotes cell elongation and division, causing the cells in the leaves to elongate and divide more, this leads to an increase in leaf size.

Hope it helps! :)

The plant hormone that helps in increasing the leaf size is the phytohormone Auxin .

Plants create signalling molecules called plant hormones, which are found in low concentration. All  plant's growth and progression are regulated by plant hormones.

There are basically five types of plant hormones that are considered to be essential for plant growth . They are Auxin , Cytokinin , Gibberellin , ABA , Ethylene .

The Cytokinin and Auxin work together to enhance the development of leaf as both of the phytohormones are responsible to modulate the growth of leaf as well  as controlling the cell cycle . These hormones are considered essential for plant growth and it occur naturally at various concentrations within plants throughout the duration .

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The most prominent ultrastructural feature of a plasma cell actively engaged in constitutive secretion of immunoglobulin is an abundance of smooth endoplasmic reticulum, which is responsible for the synthesis and folding of immunoglobulins prior to their secretion in the form of secretory granules.

Plasma cells are characterized by the presence of an abundance of smooth endoplasmic reticulum (ER) in their cytoplasm. The smooth ER is responsible for the synthesis and folding of immunoglobulins prior to their secretion in the form of secretory granules.

The process of immunoglobulin synthesis and secretion in plasma cells is complex and involves several steps. First, the plasma cell synthesizes the immunoglobulin in the rough endoplasmic reticulum (RER), where it undergoes a series of modifications, including glycosylation and disulfide bond formation, that are necessary for its proper folding and function.

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Answer:

B

Explanation:

Answer:

glucose and oxygen is the answer