Please please ASAP help me ..Will mark Brilliantest
Alex poured some pond water into three beakers. She then put waterweed into each beaker. She put the beakers in different places.


b. In the school pond there were lots of water lilies with large leaves covering the surface. There were not many plants growing below the surface. Suggest a reason for this.

Explanation: so during his practice hours  to fulfil his body's oxygen requirement  a person's pulse increases and hence meet up the body's oxygen demand.  

Answer:

I am 95% sure its b, if not then it is c

Answer:

C

Explanation:

Sediment control items created from organic, natural coconut are called coir logs or coir wattles. Since vegetation's roots help to stabilize the soil, this is crucial for erosion control.

In order for dirt to be exposed the strong winds, heavy rains, and rushing water, it must be covered. Sometimes, human activities—particularly farming and clearing land—leave soil susceptible to erosion.

If the site is unsuitable for construction and urban developments cross existing drainage systems, they may severely exacerbate soil erosion. The natural drainage of the environment is impeded by mining and exploration activities, which can result in streams becoming eroded and silted.

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Answer:

Interphase is the longest stage of the cell cycle and can be divided into 3 phases: G1 phase, S phase, G2 phase. The newly formed cell matures during the G1 phase. If the cell is going to divide, it enters the S (synthesis) phase where the DNA is replicated and the G2 phase where more growth occurs.

The interface is the first phase of the cell cycle during which the cell grows to its adequate level to start the duplication of its genetic material, the phases included in interphase are:

The cell physically grows, duplicating its organelles and the proteins needed for subsequent stages.

A complete copy of the cell's DNA is synthesized, as well as a duplicate of the centrosome, which will help separate the DNA in later stages.

The cell grows even larger, generates new proteins and organelles, and prepares for mitosis, cell division.

Therefore, we can conclude that the interface comprises the G1-S-G2 stages, and during them it grows to its proper level to start the duplication of its genetic material.

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To obtain DNA from a crime scene or an individual, the key requirement is cells.

Clothing fibers, fingerprints, and pedigree analysis are not directly related to the collection or extraction of DNA. DNA, the genetic material, is contained within cells of an individual's body.

Therefore, to obtain DNA, one needs a sample that contains viable cells. This can include various biological materials like blood, saliva, hair follicles with the root, skin cells, or semen.

These samples are collected using appropriate forensic techniques and then subjected to DNA extraction processes to isolate and analyze the genetic material.

Through DNA analysis, forensic investigators can establish links between individuals, identify suspects, or provide evidence in criminal investigations.

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Answer:

1. Darwin's finches

2.Darwin finches mattered to Darwin

:

Answer:

Diversity in traits arise over generations through mutation which cause evolution and speciation. We can determine the probability that an organism's expressed version of a trait will be passed onto its offspring through Hardy-Weinberg equilibrium. Hardy-Weinberg equilibrium helps us understand and know genotype and allele frequencies.

Through mutation, which leads to evolution and speciation, diversity in features develops over generations.

The variety of human distinctions that make up diversity includes, but is not limited to, racial or ethnic origin, gender, gender orientation, age, socioeconomic class, physical ability or traits, and political ideas.

Over generations, diversity in traits emerges through mutation, which causes evolution and speciation.

We can calculate the probability that an organism's expressed version of a trait will be passed on to its offspring using the Hardy-Weinberg equilibrium.

The Hardy-Weinberg equilibrium is used to explain genotype and allele frequencies.

Thus, this way, we can determine the probability that an organism's expressed version of a trait will be passed on to its offspring.

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Answer:

The reason why is because in the process of reproduction; there are some mistakes in DNA replication (out of billions of base pairs about 120,000 mistakes). This is what brings us so much variation in organisms.

Diatoms are single-celled algae that form distinctive and beautiful cell walls from silica. They are widely distributed throughout the upper layers of the world's oceans, and can also be found in freshwater or humid environments such as the underside of plants. When nutrients are plentiful, large diatoms predominate at the trophic level of the producer, and copepods replace their diet of ciliated protists with diatoms. When nutrient levels are low, the proliferation of small algae outnumbers that of large diatoms, so copepods switch their diet and switch to feeding on ciliates.

The main morphological characteristic of diatoms is the cell wall impregnated with silica (SIO2. nH2O), surrounded by a thin layer of organic matter, known as FRUSTULA.

Whit this information we can conclude that When nutrient levels are low, the proliferation of small algae outnumbers that of large diatoms, so copepods switch their diet and switch to feeding on ciliates.

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The endosymbiotic theory proposed that the mitochondria and the chloroplast evolve from some types of bacteria which the eukaryotic cells engulfed.

The endosymbiotic theory tries to explain how the eukaryotic cells came into existence from prokaryotic cells. According to this theory, the eukaryotic organelles like the mitochondria and the chloroplasts were actually free living prokaryotes and were taken in one after the other via endosymbiosis.

This theory has been backed by evidences which establish the phylogenetic similarity between mitochondria and bacteria and also between chloroplast and cyanobacteria. The evidences include the presence of circular DNA in both chloroplast as well as the mitochondria and also the fact they divide by binary fission like bacteria.

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Answer:

Greatly affected.

Explanation:

The conditions in the biome greatly affect the plant and animal life it contains because biome has a specific environmental conditions that allows specific organisms to survive and growth in that particular environment. A biome is a collection of plants and animals that have common characteristics for the environment in which they exist. In the cold regions, only those plants and animals survive and grow which has the adaptation and characteristics to that environment.

Answer: Suzie Martinez

Explanation:

The Calvin cycle (A) is a cyclic pathway that produces three-carbon carbohydrates from CO2.

The Calvin cycle, also known as the light-independent reactions cycle, the bio synthetic phase, the dark reactions cycle, or the photosynthetic carbon reduction (PCR) cycle, is a series of chemical reactions that convert carbon dioxide and hydrogen-carrier compounds into glucose. All photosynthetic eukaryotes and many photosynthetic bacteria have the Calvin cycle.

These reactions take place in the stroma of plants, the fluid-filled region of a chloroplast outside the thylakoid membranes. These reactions take the products of light-dependent reactions (ATP and NADPH) and perform additional chemical processes on them. The Calvin cycle converts the chemical energy of ATP and the reducing power of NADPH from light-dependent reactions into sugars for plant use.

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Full Question :The Calvin cycle

A. is a cyclic pathway that produces three-carbon carbohydrates from CO2.

B. is a linear pathway that produces three-carbon carbohydrates from CO2.

C. is a cyclic pathway that produces ATP and NADPH.

D. is a linear pathway that produces ATP and NADPH.

Cartilage is made up of a specialized type of connective tissue called chondrocytes. These chondrocytes are responsible for producing the extracellular matrix composed of collagen fibers and proteoglycans. Cartilage is made by the chondrocytes through the secretion of these substances.

Cartilage is a type of connective tissue that is made up of chondrocytes, which are specialized cells that produce and maintain the extracellular matrix of the tissue. The extracellular matrix of cartilage is made up of collagen fibers, proteoglycans, and glycosaminoglycans, which provide the tissue with its unique mechanical properties of flexibility and resistance to compression.

It is true that babies are mostly made of cartilage. During fetal development, much of the skeletal system is initially formed from cartilage, which later undergoes a process of ossification to become bone. As the baby grows and develops, the amount of cartilage in the body decreases and is replaced by bone.

However, cartilage still plays an important role in the body as it is found in the joints, nose, ears, and respiratory system, where its flexibility and shock-absorbing properties are necessary for proper function.

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LDL (low-density lipoprotein) is considered the "bad" cholesterol because it transports cholesterol from the liver to peripheral tissues.

HDL (high-density lipoprotein), on the other hand, is considered the "good" cholesterol because it acts as a scavenger, removing excess cholesterol from tissues

It carries a higher proportion of cholesterol and lower protein content, making it more likely to deposit cholesterol in the arterial walls. This can lead to the development of plaque, contributing to atherosclerosis and increasing the risk of cardiovascular disease.

HDL (high-density lipoprotein), on the other hand, is considered the "good" cholesterol because it acts as a scavenger, removing excess cholesterol from tissues and transporting it back to the liver for metabolism and excretion. HDL carries a higher proportion of protein and lower cholesterol content, allowing it to remove cholesterol from arterial walls, reducing the risk of plaque formation and atherosclerosis.

Therefore, LDL is considered "bad" because it contributes to cholesterol accumulation in arterial walls, while HDL is considered "good" because it helps remove excess cholesterol and promotes its elimination from the body, promoting cardiovascular health.

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The environmental input that is necessary for the Calvin cycle reactions is carbon dioxide (CO₂). It is captured and utilized by the enzyme Rubisco to convert carbon dioxide into glucose during the process of photosynthesis.

The Calvin Cycle, also referred to as the dark reaction, C3 cycle, or carbon fixation, is a sequence of enzyme-assisted reactions that occur in the stroma of chloroplasts in photosynthetic organisms. The Calvin cycle is responsible for transforming carbon dioxide (CO₂) into a high-energy molecule, which is used to produce glucose. This procedure occurs in three stages: carbon fixation, reduction, and regeneration. Environmental input for Calvin CycleIn the Calvin cycle, carbon dioxide is required as an environmental input.

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We can assume that the black color of the cat is given by a dominant allele (B). We also have to consider that this is a tricky question, since they ask about the phenotype (trait, like color), instead of the genotype (alleles to a particular gene, like BB, Bb, or bb).

So the phenotype of a black cat is black, or the A answer option.

Answer:

1) Males

2) Females

Explanation:

In a pedigree, Males are represented by squares, and Females are represented by circles.

The major factor that determines how many motoneurons will die during normal development is target size. Target size refers to the size and number of muscle fibers that a motoneuron innervates. During development, motoneurons compete for the limited trophic factors produced by their target muscles.

In the early stages of development, there is an overproduction of motoneurons. As they grow, motoneurons form connections with their target muscles. The muscles produce trophic factors, such as nerve growth factor (NGF), which support the survival and growth of motoneurons. However, the amount of trophic factors produced is limited, resulting in competition among motoneurons for these essential resources.
Motoneurons that successfully connect to target muscles and receive adequate trophic factors will survive, while those that fail to do so will undergo programmed cell death, or apoptosis. This process is regulated by death genes, which control the expression of proteins involved in apoptosis. As a result, only the motoneurons that have established functional connections with their target muscles will survive, ensuring proper neural circuit formation and function.
In summary, target size is the major factor determining how many motoneurons will die during normal development, with death genes playing a crucial role in regulating apoptosis. The competition for trophic factors produced by target muscles ensures that only functional motoneurons survive, ultimately contributing to the proper formation and functioning of neural circuits.

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When light travels from one medium to another, it undergoes refraction, which means it changes direction due to the change in the speed of light in different mediums. The extent of refraction depends on the angle of incidence, the refractive indices of the two mediums, and the wavelength of light.

If light travels through glycerol and then enters corn oil at an angle, the light will experience refraction at both interfaces. Whether the light bends towards or away from the normal (an imaginary line perpendicular to the surface) depends on the refractive indices of the two substances.

To determine the direction of refraction, we can use Snell's law, which states:

n1 * sin(theta1) = n2 * sin(theta2)

where:

n1 and n2 are the refractive indices of the initial and final mediums, respectively.

theta1 is the angle of incidence (between the incident ray and the normal).

theta2 is the angle of refraction (between the refracted ray and the normal).

Since, glycerol and corn oil have different refractive indices, the angles of incidence and refraction will be related. If the refractive index of glycerol is greater than that of corn oil, the light will bend towards the normal when entering the corn oil. Conversely, if the refractive index of glycerol is lower, the light will bend away from the normal.

However, without specific information about the refractive indices of glycerol and corn oil, it is challenging to make a definitive statement about the direction of refraction. The refractive indices vary with the wavelength of light, so that would also affect the overall behavior.

In summary, whether light bends towards or away from the normal when entering corn oil at an angle after traveling through glycerol depends on the refractive indices of both substances and the specific angles involved.

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Basal metabolic rate (BMR) typically makes up the biggest proportion of energy expenditure.

Basal metabolic rate (BMR) refers to the amount of energy that an organism requires to maintain its essential physiological functions while at rest, such as breathing, circulating blood, and maintaining body temperature. BMR is influenced by factors such as age, sex, body size, and body composition.

Physical activity and the thermic effect of food also contribute to an individual's overall energy expenditure. Physical activity includes any movement of the body that requires energy expenditure, such as exercise or even everyday activities like walking and climbing stairs.

The thermic effect of food refers to the energy required for the digestion, absorption, and metabolism of food.

However, BMR typically accounts for the largest proportion of an individual's energy expenditure, representing up to 60-70% of the total energy expended by the body.

Physical activity and the thermic effect of food typically account for a smaller proportion of energy expenditure, with physical activity accounting for 20-30% and the thermic effect of food accounting for approximately 10% of total energy expenditure.

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I'm assuming this is a true or false question, if that is the case, then your answer is TRUE

Answer: B. out of the shell

Explanation:

hope it helps:)

Answer:a runner positioned at the start line...