What percent of germany’s land is arable? (. From the european natural resources chat; enter a number in numerical form.)

A physical change is a change which only affects the form of a substance, but not its chemical composition. So, a physical change in terms of particle arrangement states that particles do not change apart from gaining or losing energy. It can be explained using the examples of freezing and melting.

When a substance is solid, its particles like atoms and molecules are very tightly packed. These cannot move freely but when a substance is in liquid or gaseous state, the particles are loosely packed and can move freely. So when water is solid the particles are tight but when it is in liquid state same particles can move faster. Hence, particles are same but their energy has changed.

The answer to your question is,

Catalysts

-Mabel <3

The right option is (C) as Catalyst

Enzymes are the biological compounds that Operate as catalyst and accommodate complex reaction occurs in the body-of living organism. They provide the activation energy to the biochemical reactions to just speed up the reactions (without being consumed by itself) and remain unchanged at the end of the reaction.

Starch is a polymer because it contains a repetitive combination of simple subunits.

Starch is a macromolecule that is made up of glucose subunits. Thus it can be broken down into its subunits using relevant chemical processes.

Molecules that are made up of simpler subunits linked together by chemical bonds are known as polymers.

Apart from starch, other examples of polymers include proteins, DNA, RNA, etc.

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The correct answer is: B. by mutating their DNA in response to environmental conditions to gain beneficial traits.

Bacteria such as E. coli, which reproduce asexually, can gain new traits such as antibiotic resistance through mutations in their DNA. Mutations are random changes in the DNA sequence that occur during replication or in response to environmental factors. When a mutation provides a survival advantage, such as resistance to antibiotics, it can be passed on to subsequent generations through asexual reproduction, leading to the spread of the trait within the bacterial population. This process contributes to the development of antibiotic-resistant strains of bacteria.

Bacteria like E. coli, which reproduce asexually, primarily gain new traits, such as antibiotic resistance, through mutations in their DNA. Mutations are random changes in the genetic material of an organism that can occur during DNA replication or in response to various environmental factors, such as exposure to antibiotics or other stresses.

When a mutation occurs in a bacterial cell's DNA and confers a beneficial trait, such as resistance to an antibiotic, that bacterium gains a survival advantage over others in the population. This advantage allows the mutant bacterium to survive and reproduce more successfully in the presence of the antibiotic, while susceptible bacteria are killed off. As a result, the mutant bacterium can pass on the mutated gene to its offspring through asexual reproduction, thereby spreading the trait of antibiotic resistance within the bacterial population.

Over time, as bacteria continue to reproduce and mutate, a population of bacteria may accumulate multiple mutations that contribute to antibiotic resistance. This process is a key driver of the evolution of antibiotic-resistant bacterial strains and presents a significant challenge in the treatment of bacterial infections.

E. coli gains new traits, such as antibiotic resistance, primarily [Option D] through spontaneous mutations during replication, introducing genetic variation.

The correct answer is: D) when two or more different fibers are blended.

During the crime investigation fiber analysis is an important factor. There is a possibility for fibers to be exchanged (fiber transfer), for example between the suspect and victim, if they were in physical contact at a crime. Fiber transfer depends on the type of clothing, duration of physical contact that occured between the suspect and victim, weather..  

The correct answer is when they are torn.

Final answer:

The process that increases the quantity of cells within a tissue is called hyperplasia, which leads to tissue and organ enlargement. This is part of the growth processes in multicellular organisms, where plants also grow through cell division and expansion in the meristems.

Explanation:

The term that best describes the process that increases the quantity of cells within a tissue is hyperplasia. Hyperplasia is a cellular response characterized by an increase in the number of cells, which can lead to an enlargement of tissue mass and organ size. In humans and other multicellular organisms, growth occurs not only through hyperplasia but also by increasing the non-cellular material around cells, and to a limited extent, enlarging the size of existing cells.

In the context of plant growth, the increase in the size of plants occurs as individual cells, produced by cell divisions in the meristems, expand. This is a key aspect of the growth processes in plants. Additionally, there is a phase known as the exponential or log phase, during which cells undergo predictable doublings in their numbers, a phase that is essential for rapid growth and is ideal for experiments due to the uniformity and health of the cells.

Final answer:

As a cell grows in size, its volume increases more rapidly than its surface area, leading to a decrease in the surface area-to-volume ratio which makes it harder for the cell to exchange substances efficiently. Therefore, larger organisms require specialized organs to handle these exchanges.

Explanation:

As a cell grows, its volume increases much more rapidly than its surface area. This is because the volume of a cell grows cubically (to the power of three) while the surface area grows quadratically (to the power of two). Consider a cell as a sphere with the formula for surface area being 4πr² and for volume 4πr³/3. As the radius increases, the surface area-to-volume ratio decreases, leading to inefficient exchange of materials.

For instance, in Figure 5.2.4, a small cell with dimensions of 1mm has a surface area to volume ratio of 6:1, while a larger cell with dimensions of 2mm has a surface area to volume ratio of 3:1, displaying that volume increases faster than surface area. This increasing ratio affects the ability of the cell to transport nutrients and waste efficiently across the cell membrane, crucial for cellular functions like obtaining oxygen, growth, and reproduction.

Thus, as an organism grows, it needs specialized organs to aid in efficiently exchanging substances, due to the decreasing surface area-to-volume ratio with increasing cell size.

Gyres.

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In the mentioned conditions, the hunting behaviors of the bats are influenced by the noisy surroundings as the hunting methods of the bats will get modified to amend with their noisy environments. The bats rely on echolocation in order to hunt their prey.  

Thus, in a surrounding with ample noises, it becomes difficult for the bat to detect or hear the sounds of the prey amid the noises of the city. This could result in two outcomes, that is, either the population of the bat gets decreased, or a new hunting technique gets developed within the population of the bats.  

Final answer:

High levels of noise pollution can severely interfere with bat echolocation, leading to increased difficulty in hunting, heightened alertness but reduced responsiveness to signals, and overall increased vulnerability to predators.

Explanation:

The hunting behavior of bats may be significantly affected by noise pollution in areas like heavily trafficked bridges. Bats rely on echolocation to hunt, which is a process that involves emitting ultrasonic sounds to find and track prey through the echoes that bounce back. In environments with high levels of noise pollution, these echolocation signals can be masked by the ambient sounds, making it difficult for bats to detect and hone in on their prey. This can interfere with their feeding, reproduction, and predator-avoidance behaviors. Additionally, noise pollution can increase alertness but also reduce responsiveness to important signals, such as alarm calls, making bats less fit and more vulnerable to predators.

Since about 800 species of bats echolocate, and have sophisticated brain circuitry and unique facial structures designed to funnel sound and avoid background noise, the interference from environmental noise can severely impact their ability to locate insects or other prey with precision. While bats are known to adapt their hunting tactics, such as using Doppler shift detection to assess the velocity and direction of prey, persistent noise could still cause difficulties by masking vital auditory cues. This uncertainty in locating prey can be particularly critical when bats accidentally enter houses and struggle to find exit points due to the complex sound reflections within closed spaces.

Answer:

organelles

Explanation:

An oxygen atom would be the smallest particle representing hydrogen peroxide.

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I think the answer is a molecule.(IS IT UP THERE ?)

Final answer:

The correct answer is Option B, where the presence of vestigial pelvic bones in both snakes and dogs suggests a shared evolutionary history, highlighting homologous structures that descend from a common ancestor.

Explanation:

The question asks for evidence from developmental biology that supports a shared evolutionary history among different organisms. Among the given options, the one that provides such evidence is the presence of vestigial structures. Specifically, Option B states that both snakes and dogs have pelvic bones, even though these are vestigial in snakes, indicating that snakes descended from ancestors with legs. Such structures suggest a common ancestor and thus provide evidence for evolution according to the principle of homology.

It is important to differentiate homologous structures from analogous structures. Homologous structures share a common ancestral origin even if their functions have diverged, while analogous structures have similar functions but do not stem from a common ancestor and are the result of convergent evolution. For example, despite having similar body shapes, dolphins and fish exhibit analogous structures optimized for moving through water, but they do not indicate a recent common ancestor. Vestigial structures, however, do provide a clear indication of a shared evolutionary history.

Question asked:A mother has blood type A and her son has blood type O. Which blood types are possible for the father?

Answer:usually if one parent has one blood type that is different then their child like the mother having type A and then the child having type O. One parent probably passes a type O allele.

So the father more than likely has type O like the child

Answer:

A, B or O

Explanation:

The ABO blood type is regulated by three alleles of gene "I". The genotype "ii" gives blood type "O". Since the son of the given parents have blood type "O" (genotype: ii), both parents should have one copy of "i" allele.

Hence, the possible genotype and respective phenotypes for the father are:

1. IAi (A blood type)

2. IBi (B blood type)

3. ii (O blood type)  

The experiment conducted by Paul was not a waste of his time and resources even though he could not accomplish the experiment he initially prepared to conduct. The reluctance of the penguins to eat burgers even though they were starving and losing weight pointed towards the fact that they do not find junk food appealing. It could be concluded from their reluctance that they will eat only their normal diet rather than something they have never eaten before.

Answer:

its's D) Paul  found  that fast  food burgers  cause penguins to lose  weight.

Explanation:

Passive sensors gather radiation that is emitted or reflected by the object or surrounding areas. Reflected sunlight is the most common source of radiation measured by passive sensors. Examples of passive remote sensors include film photography, infrared, charge-coupled devices, and radiometers. Active collection, on the other hand, emits energy in order to scan objects and areas whereupon a sensor then detects and measures the radiation that is reflected or backscattered from the target. RADAR and LiDAR are examples of active remote sensing where the time delay between emission and return is measured, establishing the location, speed and direction of an object.

Remote sensing is a technology used to collect data from satellite or airborne sensors to create accurate maps of Earth's surface features. It involves analyzing electromagnetic radiation to determine various surface characteristics such as vegetation, land use, and topography.

Remote sensing is used to make accurate maps of Earth's surface features by collecting data from satellite or airborne sensors. These sensors capture electromagnetic radiation reflected or emitted by the Earth's surface and atmosphere. By analyzing this data, scientists can create detailed maps that show various surface features such as vegetation, land use, and topography.

For example, remote sensing can be used to create maps that show the distribution of different land cover types, such as forests, agricultural fields, and urban areas. This information is valuable for urban planning, natural resource management, and environmental monitoring.

Some of the key remote sensing technologies used to create accurate maps include aerial photography, multispectral and hyperspectral imaging, and LiDAR (Light Detection and Ranging).

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1.ATP

2.If a red blood cell is placed in water, water enters the cell by osmosis. Because the membrane is quite weak the cell WILL BURST as the volume and therefore the pressure in the cell increases. Red blood cells shrink when placed in concentrated solutions of sugar as water moves out of them by osmosis. so answer is C

2) Most likely shrink

Sea- sea surface height

The answer is B, because Macromolecules are formed by combining single units, called Monomers. The monomers combine with each other using covalent bonds to form larger molecules known as polymers.

Macromolecules are formed by combining single units, called monomers, together to form a chain, called polymers.

Answer: Option B

Explanation:

Polymers are substances that are formed when many molecules of monomers are linked together to form a complete chain, this may be a homopolymer when identical monomers are linked together or a heteropolymer in which non identical monomers are linked together.

Many of our biomolecules are polymers that arise by continuous linkage of monomers for example protein which contains amino acids as its monomers.

I'd say the answer is D

During an El Niño, the trade winds weaken in the central and western Pacific. Surface water temperatures off South America warm up, because there is less upwelling of the cold water from below to cool the surface. The clouds and rainstorms associated with warm ocean waters also shift toward the east. (Sorry if you mean something else it would be a common mistake)

GPS is used to know the physical location, and the weather station gathers local information about temperature. The telescope is used to track things invisible to the eyes. Thus, the correct options are 1. C, 2. A, and 3. B.

A global Positioning System (GPS) is a device based on the space and radio-navigation system that uses the broadcasting signals from the satellites to locate the precise location of the movement. Hence, option C is correct.

The weather station is a center that provides information and data on the atmospheric conditions by forecasting the data on temperature, humidity, precipitation, etc. with various equipment. Hence, option A is correct.

The telescope is a scientific instrument used to see the images of faraway objects that can not be seen directly with the eyes. It can be used to see the celestial bodies. Hence, option B is correct.

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Atomic mass of an element refers to a weighted average of the atomic weights of all naturally occurring isotopes of an element.

The atomic mass of an element is the weighted average mass of the atoms of all naturally occurring isotopes of the element. Atomic mass is usually reported in atomic mass units and it can be calculated using the weights of the different isotopes and the relative abundances of the element's naturally occurring isotopes. The atomic mass of each element is usually indicated below the element's symbol in each square in the periodic table. For example, the atomic mass of the element boron is 10.8, while that of neon is 20.8.

The hurricane Floyd took place in the East Coast of the United States during 1999. It caused extensive destruction in its path. However, there was one fact that was astonishing for the scientists is that in spite of causing such a mass destruction on the terrestrial surface, the hurricane resulted in no harm to the aquatic life. That is, no major fishes were killed during the hurricane.

Answer: Osmosis is the diffusion of water molecules, from a regions of higher concentration to a region of lower concentration, through a selectively permeable membrane. Osmosis is directly dependent upon the concentrations of the solutes : a dilute solution will contain a higher concentration of water molecules, while a concentrated solution contains a low concentration of water molecules.  As, a result of this the level on more concentrated side will rise and cell will get swell. On the other hand the level on less concentrated side the cell will shrink. When concentration is the same on both the sides of the membrane , the movement of water molecules will be the same in both directions. At this point, the net exchange of water will become zero and there will be no changes in the liquid levels.

Osmosis is the movement of water across a selectively permeable membrane due to differences in solute concentrations on either side, facilitated by proteins such as aquaporins.

The diffusion of water across a selectively permeable membrane depending on the concentration of solutes on either side of the membrane is called osmosis. This process is vitally important for maintaining cellular integrity and responding to changes in solute concentrations outside the cell. Osmosis can be described as the movement of water through a semipermeable membrane from a region of higher water concentration (lower solute concentration) to a region of lower water concentration (higher solute concentration). This occurs until the concentration of water and solute equalizes on both sides of the membrane or the hydrostatic pressure equals the osmotic pressure. In living systems, aquaporins play a crucial role in facilitating water movement across cell membranes, enabling osmosis to proceed efficiently.

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The 'jelly-like' substance in a cell where chemical reactions take place is known as the cytosol or cytoplasm. It houses cellular organelles and carries various essential substances. All metabolic processes, including protein synthesis, occur within the cytoplasm.

The 'jelly-like' substance where a cell's chemical reactions take place is referred to as the cytosol or cytoplasm. It comprises of the entire region of the cell between the plasma membrane and the nuclear envelope. The cytoplasm is made up of organelles suspended in the semi-solid cytosol, the cytoskeleton, and various chemicals. These include proteins, glucose, simple sugars, polysaccharides, amino acids, nucleic acids, and fatty acids, among others. Dissolved ions such as sodium, potassium, and calcium are also present in the cytoplasm.

All the cell's metabolic reactions, including protein synthesis, occur in the cytoplasm. Additionally, the cytoplasm contains cellular organelles, each performing a unique function to keep the cell healthy and performing its series of essential activities.

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Final answer:

The statement that best describes science is that it cannot answer questions about right and wrong, as it is limited to material phenomena that can be observed and measured. Scientific knowledge is continuously building upon itself and can be revised with new evidence, enhancing rather than detracting from its reliability.

Explanation:

The statement that best describes science is that science cannot answer questions about right and wrong. Science is a systematic approach to understanding natural phenomena through observation and experimentation, creating testable explanations and predictions. However, there are limitations to what science can explain. Questions that relate to morality, aesthetics, or spirituality fall outside the scope of scientific inquiry because they are not material phenomena and hence, cannot be observed or measured in the same way physical events can.

Moreover, scientific knowledge builds upon itself but can always be revised with new evidence or perspectives. While observations in science do not need to be made with the eye—telescopes, microscopes, and other instruments are often used—scientists may draw conclusions from indirect observations or using theories to explain unobserved phenomena. However, for something to be scientifically tested, there has to be some form of observable effect or consequence that can be measured. For instance, black holes cannot be seen directly, but their existence is confirmed by the gravitational effects they have on surrounding matter.

In terms of susceptibility to being disproven, frontier science, which deals with brand-new discoveries or models, is generally more prone to revision than established consensus science. Lastly, it's important to understand that a dramatic change in scientific understanding is called a scientific revolution, and this demonstrates that while scientific ideas may change, this flexibility enhances their reliability rather than detracts from it. Science is indeed a process, and a scientific law describes what happens under certain conditions based on repeated empirical evidence.