help...........!!!!!!!

They provide rigid support for the cell

One important function of plasmodesmata is to allow the exchange of molecules and substances between adjacent plant cells. These channels allow nutrients, signaling molecules, and other important compounds to move between cells, enabling them to coordinate their activities and respond to changing environmental conditions. Hence the correct option is D.

Plasmodesmata are small channels that connect the cytoplasm of adjacent plant cells, allowing them to communicate and exchange materials. They are formed when the cell wall is perforated by cytoplasmic strands that extend from one cell to another, forming a continuous channel between the two.

Plasmodesmata also play a crucial role in the transport of nutrients and other materials throughout the plant. They allow the movement of molecules such as sugars, amino acids, and ions from the site of production to the site of storage or utilization. This helps to ensure that the plant has a constant supply of the materials it needs to grow and function.

In addition, plasmodesmata can also facilitate the spread of infections or diseases throughout the plant. Some plant viruses and pathogens can use these channels to move from one cell to another, allowing them to infect the entire plant and cause widespread damage.

Hence the correct option is D.

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Answer:

The ribosomes make proteins, and the nucleus stores genetic information

Explanation:

Ribosomes are organelles found in all cell types. These are small, membrane-free particles composed of ribosomal RNA and proteins. Ribosomes act on the cell by performing protein synthesis. They can be found inside chloroplasts and mitochondria, free in the cytoplasm, performing protein synthesis that will be used there or they may be associated with the endoplasmic reticulum, forming the rough endoplasmic reticulum. In the latter case, the proteins they produce are transported to the extracellular medium.

The nucleus, in turn, is responsible for all cellular functions. Mainly the control of cellular chemical reactions. It is in the nucleus of cells that DNA is located, so we can say that the nucleus has the function of storing all genetic information.

Mitochondria, ​​​​​​digest excess or worn out organelles is correctly matched with its function. Correct option is C.

C. Mitochondria, ​​​​​​digest excess or worn out organelles

Mitochondria are responsible for generating energy in the form of ATP through cellular respiration. They are often referred to as the "powerhouses" of the cell because they produce the majority of the cell's energy. However, the function described in option C, "digest excess or worn out organelles," is not accurate. This function is actually performed by lysosomes.

The other options are not correctly matched with their functions:

A. Lysosomes, produce energy currency of the cell - This is not true. Lysosomes are organelles that contain enzymes responsible for breaking down waste materials and cellular debris. They are involved in intracellular digestion.

B. Golgi apparatus, protein synthesis - This is not true. The Golgi apparatus is involved in modifying, sorting, and packaging proteins and lipids for transport to their final destinations within or outside the cell. It does not directly participate in protein synthesis, which occurs on ribosomes.

D. Rough endoplasmic reticulum, protein synthesis - This is partially true. The rough endoplasmic reticulum (RER) is studded with ribosomes on its cytoplasmic surface, and it is involved in the synthesis of proteins. However, the synthesis of proteins primarily occurs on the ribosomes attached to the RER, not within the RER itself. The RER also plays a role in protein folding and transport.

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Complete question is:

Which one of the following organelles is correctly matched with its function?

A

Lysosomes, produce energy currency of the cell

B

Golgi apparatus, protein snthesis

C

Mitochondria, ​​​​​​digest excess or worn out organelles

D

Rough endoplasmic reticulum, protein synthesis

In the given case, most probably the top layer is of oil.  

As oil is not soluble in water, it will float on the top of the water surface, in the given case it is the beaker. The oil will always float on top of the water, as it is less dense in comparison to water. The water and oil do not mix as the molecules of water are more fascinated with each other than in comparison to the molecules of oil.  

As water is polar and oil is nonpolar, their molecules are not attracted to each other.  

He chose to study birds, plants, and animals. Mostly 2 types of Finches.

Answer:

C and D or it might just be C

Explanation:

The process by which energy stored in food is released and made available for use by living organisms is called cellular respiration.

Cellular respiration is a series of metabolic pathways that occur within the cells of organisms, and it involves the breakdown of organic molecules, such as glucose, to release energy in a form that cells can use, usually in the form of adenosine triphosphate (ATP).

The overall process of cellular respiration can be summarized in three main stages or cycles which take place in the cytoplasm and mitochondria of a cell. Cellular respiration is a fundamental process for the generation of energy in living organisms, providing the necessary ATP for various cellular activities and maintaining the energy balance within the organism.

Answer:

B or D

Explanation:

I have the same question and Im confused too. Do you know which one it is yet?

D. Meiosis because babies or humans are made of a combination of our parent’s genes. Meiosis is mitosis times 2. So you get more pairs that are different. Mitosis produces identical offsprings.

Sexual reproduction requires cells to undergo meiosis, whereas only mitosis is necessary for asexual reproduction. Thus, the correct option is D.

Sexual reproduction involves the production of new organisms through the combination of genetic information of two individuals which are of different sexes. In most of the species, the genetic information is being carried on by the chromosomes in the nucleus of reproductive cells which are known as germ cells or gametes, which then undergo fertilization and fuse to form a diploid zygote.

Gametes are produced through meiosis because these are haploid. Thus, sexual reproduction required cells to undergo meiosis, whereas only mitosis is necessary for asexual reproduction.

Therefore, the correct option is D.

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The surface proteins on a virus help it to invade a host cell by binding to specific receptors on the host cell's surface. This binding triggers changes that allow the viral genetic material to enter the cell, where it can hijack the cell's machinery to reproduce.

Viruses are tiny infectious particles that can't reproduce on their own. To replicate, they must invade host cells and hijack their machinery. The surface proteins on a virus play a crucial role in this process, acting like keys that unlock the host cell.

These proteins, called attachment proteins, bind to specific receptors on the host cell's surface. These receptors are normally used by the cell to communicate with other cells or with its environment. But when a virus binds to a receptor, it triggers a change in the receptor's shape. This change can cause the host cell membrane to merge with the virus's envelope, allowing the viral genetic material to enter the cell.

Once inside the cell, the virus's genetic material takes over the cell's machinery. It forces the cell to make copies of the viral genome and proteins. These new viruses then bud out of the host cell, ready to infect other cells.

Here are some additional details that you may find interesting:

The type of surface proteins a virus has determines which cells it can infect. For example, the influenza virus has proteins that bind to receptors on lung cells, which is why it causes respiratory infections.

Some viruses have multiple attachment proteins, which allows them to bind to different types of receptors and infect a wider range of cells.

The development of vaccines often targets the surface proteins of viruses. By preventing the virus from binding to host cells, vaccines can help to prevent infection.

Determining the number of days a corpse has been decomposing based on the absence of ants is not possible without additional context and forensic investigation. Biological decomposition is complex and influenced by many factors, requiring the expertise of a forensic entomologist for accurate time of death estimation.

The question is attempting to estimate the time of death based on the presence or absence of specific types of decomposition, specifically the lack of ants on a corpse found in the woods. Biological decomposition is a process that occurs in stages, involving various organisms and environmental factors. Typically, insects such as ants are attracted to a corpse shortly after death, participating in the decomposition. However, an exact time frame cannot be provided without considering additional factors such as temperature, humidity, the condition of the corpse, and whether it was found in an environment that ants could access. For a professional determination of the postmortem interval, a forensic entomologist would examine the corpse and the associated insects.

Examples from literature describe situations where bodies decay or remain preserved in different conditions. Bogs, for example, can preserve bodies for centuries due to their acidic, low-temperature, and anaerobic conditions, which slow down decomposition. The absence of ants could also be related to such specific circumstances or by the actions of other predators and environmental conditions that make it unsuitable for ant colonization. Without specialized knowledge and a thorough investigation, the number of days the corpse has been in the woods cannot be accurately determined.

he's right one it but the order might change

Vacuole.

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Ocean water temperatures differ between the poles and the equator due to the amount of sunlight received, the Earth's tilt, and atmospheric temperature differences, as well as the insulating properties of ice and specialized oceanic circulation patterns.

The temperature difference between ocean water at the poles and the equator is largely due to the amount of sunlight that these regions receive, which is influenced by the Earth's tilt. This leads to varying degrees of heat absorption and atmospheric temperature. The cold, dense waters of the Southern Ocean Subtropical Convergence meet warmer waters from the Pacific, Atlantic, and Indian Oceans, causing a difference in water temperatures. Notably, the ice at poles acts as a thermal brake, which slows down warming. Additionally, oceanic circulation patterns concentrate heating in the upper layers rather than evenly throughout, further contributing to colder deep waters.

Another reason for colder polar waters includes the unique property of water that becomes less dense as it freezes. Therefore, ice forms on the top layer, providing an insulating effect that keeps deeper water relatively warmer, allowing aquatic life to survive the colder temperatures at the poles. The Earth's distance from the Sun, which varies by about 3%, is not significant enough to cause the temperature differences; it's the tilt of Earth's axis that results in seasonal changes and impacts ocean temperatures as well.

Final answer:

Ocean water is colder at the poles than at the equator due to the Earth's axial tilt, which causes variations in the angle of sunlight. Additionally, cold air masses and frigid winds further contribute to the cold temperatures at the poles.

Explanation:

The primary reason for ocean water being colder at the poles than at the equator is due to the Earth's axial tilt, which causes variations in the angle at which sunlight strikes different parts of the Earth. The poles receive sunlight at a more oblique angle than the equator, resulting in less direct heating. Additionally, the Earth's rotational motion causes the movement of ocean currents, which affects the distribution of warm and cold water.

At the poles, the cold air masses and frigid winds further contribute to the overall cold temperatures of the ocean water. These factors combined result in the colder temperatures observed at the poles in comparison to the warmer waters found at the equator.

The answer is 300 joules of energy.

An energy pyramid is a presentation of the trophic levels in an ecosystem. Energy from the sun is transferred through the ecosystem by passing through various trophic levels. Roughly 10% of the energy is transferred from one trophic level to the next, thus preventing a large number of trophic levels.

Answer:

300 KJ

Explanation:

Edge 2020

The correct step of the rock cycle that happens as sea stacks are broken down is Weathering.

The rock cycle is a continuous process describing the transformation of rocks from one form to another over time due to various earth processes. It starts with igneous rocks forming from the cooling and solidification of molten magma or lava. These rocks are then subjected to weathering, the breaking down and chemical alteration of rock materials. Weathering produces sediment, which can be transported by water, wind, or ice. When the movement ceases, deposition occurs as materials settle out of the transporting medium. After deposition, layers of sediment are buried, and pressure changes and increases with depth, leading to the compaction of sediments, a step in forming sedimentary rocks. Additionally, heat and temperature changes can promote metamorphism, converting existing rocks into metamorphic rocks without any melting. When conditions are right, melting occurs, and the cycle begins anew with the formation of igneous rock.

It could be cooled which would then cause it to become over-saturated resulting in condensation that would return the air to a saturated state. Over-saturated air, with a humidity greater than 100%, is unstable, causing changes to restore stability. Hope this helps!

8 plasma membrane

9 phospholipid bilayer

10 endocytosis

11 equilibrium is reached

12 diffusion

13 faculated diffusion

Answer:

A).land for mining  

C).land for grazing

D).land for developing oil

E).land for developing gas

Explanation:

Hey there!

Water is a polar molecule.

Why? Water has unbalanced electrons, meaning one side of the molecule is slightly negative while the other is slightly positive. This results in water being able to dissolve many things, resulting it in being called a "universal solvent".

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Homo-sapien. It was scientists original name for humans.

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Answer & explanation:

Distilled water cannot be inserted into the bloodstream as it is a pure water (H₂O) compound without the addition of any minerals or salt in its composition.

If distilled water is injected into a patient, it may cause changes in the blood, turning the enviroment hypotonic, facilitating the passage of water and removing nutrients, salts and ions, as well as disrupting red blood cells  (hemolysis) due to excess water, or even modify the pH of the blood, leading to several complications.

Distilled water in the bloodstream creates problems due to osmotic pressure; it is hypotonic and can lead to cell swelling and lysis, which may cause serious medical complications.

The problem created by introducing distilled water into a patient's bloodstream is related to osmotic pressure. Distilled water is hypotonic compared to the body's cells, which means it has fewer solutes. When it is introduced into the bloodstream, the water moves into the body's cells in an attempt to equalize solute concentrations. This can cause cells to swell and potentially burst, a process known as lysis. In a medical setting, an incorrect infusion can cause hemolysis, where red blood cells are destroyed, leading to a variety of complications.

In contrast, hypertonic solutions like saline have higher solute concentrations than the body's cells, drawing water out of the cells and causing them to shrink. Understanding the concepts of osmotic pressure and tonicity is vital in medical treatments to prevent cellular damage and ensure the proper hydration and functioning of the body's tissues.

  The correct answer for this question is D

The temperate forest occurs across north America, Europe and Asia. This biome consist of evergreen conifers with needle like leaves which are able to tolerate wide fluctuation of temperature and light.  Some vegetation of temperate biome are Pine, Fir and Hemlock. The trees and shrubs of temperate forest usually shed their leaves with the onset of autumn and new leaves are produced in early spring

Taiga is the Russian word for forest and is the largest biome in the world. This biome contain mostly coniferous trees. These conifers contain long, thin waxy needles. The wax gives them protection against freezing temperature and from drying out. They do not sheds their leaves in winter and keep their needles all year long.

Answer:

D

Explanation there is your answer sweet heart

the composition of the minerals

The most constant temperature is found in tropical rainforest.

Tropical rainforests are found near the equator and have temperatures between 20°C and 25°C year-round. There is no dry season in tropical rainforests, all months have an average precipitation and receive about 250 cm of rainfall per year. Tropical forests are classified by the amount of rainfall received each year.

Answer:

It's B make observations

Final answer:

Technological advancements have notably increased scientists' abilities to make observations and develop hypotheses, which are key components of the scientific method. This iterative process includes observation, hypothesis development, experimentation, and communication of findings, thereby enhancing scientific knowledge.

Explanation:

Human curiosity has driven advancements in technology, which have augmented scientists' ability to make observations. Observations are the fundamental first step in the scientific method, a process that involves forming a question based on initial observations, conducting preliminary research, developing a hypothesis, and then performing experiments to test that hypothesis. Through this methodical approach, scientists make further observations, refine their hypotheses, and iteratively enhance their understanding of the natural world.

In addition to making observations, advancements in technology have also allowed scientists to develop hypotheses about phenomena, design more sophisticated and controlled experiments, and share and communicate their findings with others in the scientific community for validation and further exploration. This cycle of hypothesis-testing and communication leads to a more detailed comprehension of scientific concepts and real-world applications.

True statement is;

The difference between a community and an ecosystem is that the community is only the biotic factors while an ecosystem system includes both the biotic and abiotic factors.

All the different populations that live together in an area make up a community. Ecosystems The community of organisms that live in a particular area, along with their nonliving environment is called and ecosystem.

Because Nonpolar and small polar molecules can pass through the cell membrane, so they diffuse across it in response to concentration gradients. Carbon dioxide and oxygen are two special molecules that undergo this simple diffusion which goes through the membrane.

Answer . These two molecules form what is known as a triglyceride or a fat. Two common forms of triglycerides are saturated and un saturated fats.. so basically lipids

B. Lipids.

Enzymes are protein molecules which serve as catalysts for chemical reactions. A catalyst is a substance which will decrease the activation energy for a reaction. ... Enzymes will make reactions occur much more easily, quickly and more efficiently than they ever would without the enzyme.

By lowering energy of activation of the reaction.

High energy produced during the metabolism of reactant to product. Due to the large free energy of activation, the speeds of uncatalyzed biochemical reactions are often exceedingly slow. Enzymes lower this energy of activation so that more molecules have adequate energy to carry into the transition state to speed up the rate of reaction.

Yes, the definition of a straight angle is reversible. A straight angle is an angle that measures 180°.

Yes, the definition of a straight angle is reversible. A straight angle is an angle that measures 180°.

A true biconditional statement for this definition would be:

A figure is a straight angle if and only if it measures 180°.