Which of the following environmental factors belongs to biotic factors? 1. Wind 2. Salinity 3. Soil moisture 4. Microorganism​​

Answer:

C. It will be faster in sphere shaped bacterium as it has more SA/V ratio.

Explanation:

EDGE 2020 AP BIO

The correct answer is: It will be faster in the sphere-shaped bacterium since it has a higher SA/V ratio. The surface area-to-volume ratio (SA/V) of a bacterium is important for its nutrient diffusion.

The SA/V ratio is the ratio of the surface area of a cell to its volume. A higher SA/V ratio means that the cell has a larger surface area relative to its volume and therefore more area for nutrient diffusion.

In this case, the sphere-shaped bacterium has a higher SA/V ratio than the rod-shaped bacterium (4.6 µm2 vs 0.8 µm2). This means that the sphere-shaped bacterium will have a greater surface area for nutrient diffusion, resulting in faster nutrient diffusion than the rod-shaped bacterium.

The SA/V ratio is also important for a cell's growth and metabolism. Cells with higher SA/V ratios can grow faster than those with lower SA/V ratios since they have more surface area for nutrient diffusion.

This means that the sphere-shaped bacterium will be able to grow and metabolize faster than the rod-shaped bacterium.

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Gel electrophoresis is the most appropriate technique of biotechnology for analyzing the blood at a crime scene.

Here, correct option is D.

This technique involves running the blood samples through a gel matrix and applying an electric current to it. The charged molecules, such as the DNA, will move through the gel toward the positive or negative pole depending on their charge.

By doing this, the DNA strands in the blood samples can be separated and analyzed, allowing for the identification of both the victim and the assailant. Gel electrophoresis is a powerful technique that can provide reliable and accurate results, making it an invaluable tool in forensic investigations.

Therefore, correct option is D.

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If a scientist isolates genes for Hepatitus B antigens from a Hepatitus virus, then inserts them into a bacterial plasmid and replicates the bacteria in a fermenter, the product collected will be transgenic bacterial plasmids, inside the bacteria, in order to proove if the transgenic plasmid actually gives the bacteria resistance to the virus, it has to be grown in an infected medium.

The correct answer is option A.

Answer:

B. Inability of the body to send oxygen to tussues

Answer:

Self-replicating: Plasmids contains origin of replication and hence they are able to multiply by themselves independently of the chromosomal DNA. They maintain their number in progenies.

ii) Low molecular weight: Plasmids have low molecular weight which makes them easy to handle and hence can be present in multiple copies.

iii) Multiple Cloning Sites: This is a site on plasmid which has recognition sites for many restriction enzymes.

iv) Selectable Marker:  Plasmid has certain genes which help in identifying the transformed cells. For example, antibiotic resistance genes.

v) High copy number: Due to low molecular weight of plasmids, they are present in multiple copies. High copy number plasmids are require to produce large quantities of the recombinant DNA.

vi) Host range: Plasmids used as coning vectors have narrow host range so that transmission of these plasmids to other organism in environment is avoided.

Explanation:

3. Preventing natural evolution

Answer: You could use similarities in their base pairs. The more that are the same are more likely to be closely related compared to two beetles with few similar sequences.

Explanation:

An action potential is a brief change in an electrical voltage across a neuron's membrane that occurs when the neuron is stimulated. In motor neurons, the action potential is generated when an electrical signal from the brain or spinal cord is received.

This signal causes an influx of sodium ions into the neuron, which causes the membrane potential to become more positive and reach the threshold for an action potential. The action potential then travels down the neuron's axon, causing a release of neurotransmitter at the axon terminal, which then stimulates the muscle fibers to contract.

An action potential is an electrical signal that is generated by a neuron when it is stimulated. It is the main way that neurons communicate with each other and with other cells in the body. The action potential is generated when the neuron receives a stimulus, such as a chemical signal or a physical stimulus.

When a neuron is stimulated, the electrical charge inside the neuron changes. This change in electrical charge causes an influx of positively-charged ions into the neuron, which causes the interior of the neuron to become more positively charged. This action results in an action potential, which is an electrical signal that travels down the neuron.

The action potential is generated when the membrane potential of the neuron reaches a certain threshold. This threshold is determined by the type of neuron, and it is usually around -55mV. When the membrane potential reaches this threshold, the neuron will fire an action potential.

The action potential is generated by ion channels in the neuron membrane. These channels will open when the membrane potential reaches a certain threshold, and the ions will flow into the neuron. This influx of ions causes the interior of the neuron to become more positively charged, which then causes the opposite side of the membrane to become more negatively charged.

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Answer:

Temperate Grasslands/ Grasslands

Explanation:

This biome's soil is fertilized and it is rich because of the decay of deep.

(I hope this make sense)

The answers to the given questions are as follows:

The procedure used to build a well and bore tubes through the Earth's surface is known as oil drilling. The tube is attached to a pump, which forcibly removes the petroleum from underground.

Because oil and natural gas are found far below the earth's surface, drilling is a difficult procedure. To access fossil fuel resources, a hole must be drilled through the crust of the planet. After that, the oil must be safely pumped out of the oil well.

Steps of Oil Drilling:

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Answer:

Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells.

Answer:

1. meiosis require two nuclear division but mitosis requires only one nuclear division  

2. meiosis produces four daughter divisions, and there are four daughters cell following cytokinesis. Mitosis followed by cytokinesis result in two daughter cells  

3. in meiosis, the four daughter cells are haploid and have half the chromosome number as the parent cell. In mitosis, the daughter cell have the same chromosome number as the parent cell  

4. in meiosis the daughter are genetically dissimilar to each other and to parent but in mitosis, the daughter cells are genetically identical to each other and to the parent.

Explanation:

Answer:

commensalistic- you were in the womb

mutualistic-At work

parasitic-living with parents

Explanation:

1)When you were in the womb you took nutrients from your mother but your mom didn't benefit but she wasn't dying either.

2) You do a job, get payed so thats how you benefit. You help your employer by completing work and giving them profit also.

3) Your parents raised you,feed you,buy you clothes ans stuff, spend time at your school events,pay for your utilities while you live with them but you don't really give them much back.

The three correct sources of lake water are as follows:

A lake is a body of water that is surrounded by land. They are of various sizes and depth and can be found all over the world.

The water in lakes comes from the following sources;

Lakes are supplied with water by rainfall that falls directly on the surface of the lake, by water run-off from the adjacent land and small streams, or by groundwater that seeps through the soil to the lowest point which is the lake.

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Answer:

Condensation....I think

Answer:

I would believe the answer is condensation. sorry if it's wrong, I haven't taken this course in a long time. <333

Answer:

shh, im just as confused as you, ask ur teacher for help or ur parent

Explanation:

Answer: enzymes change the Keq for chemical reactions.

Explanation: many enzymes change shape slightly when substrate binds. reactions occur at the "active site" of enzymes, where a precise 3D orientation of amino acids is an important feature of catalysis.

Answer:

A.

Explanation:

All living things (whether a plant or an animal) will have cells

Answer:

A, All living things

Explanation:

Animals, plants, bacteria, fungi, etc. are compossed of cells: the most basic and smallest unit of life.

Answer:

C. could not provide a mechanism for moving continents

Explanation:

Without the discovery of magnetic reversals recorded on the ocean floor, scientists  could not provide a mechanism for moving continents.

Magnetic reversals are responsible for geological shifts and depend on the distribution of tectonic plates that causes movements of continents.

Asymmetric movement of tectonic plates leads to movement of continents  and the degree of asymmetry varies with the same rythm of the magnetic reversal rate.

Hence, discovery of magnetic reversals are important to identify the mechanism for moving continents.

The study of a living being is called biology.

The correct answer is C.

Without the discovery of magnetic reversals recorded on the ocean floor, scientists could not provide a mechanism for moving continents because magnetic reversals are responsible for geological shifts and depend on the distribution of tectonic plates that causes movements of continents.

Asymmetric movement of tectonic plates leads to movement of continents and the degree of asymmetry varies with the same rhythm of the magnetic reversal rate.  Therefore the discovery of magnetic reversals is important to identify the mechanism for moving continents.

Hence, the correct answer is C that it could not provide a mechanism for moving continents.

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The majority of sodium reabsorption occurs at the proximal convoluted tubule. During this process sodium enters the tubule cells at the and exits the tubule cells at the d. luminal membrane through the sodium potassium pump; basolateral membrane by facilitated diffusion

The sodium-potassium pump actively transports sodium ions from the lumen of the tubule into the tubule cells, against their concentration gradient, using energy derived from the hydrolysis of ATP. Once inside the tubule cells, sodium ions diffuse passively down their concentration gradient out of the cells into the interstitial fluid through specific transporters in the basolateral membrane. This process is facilitated by the concentration gradient established by the sodium-potassium pump.

Together, the sodium-potassium pump and facilitated diffusion across the basolateral membrane drive the reabsorption of the majority of filtered sodium at the proximal convoluted tubule, which is essential for maintaining sodium and water balance in the body. So therefore the correct answer is d. During sodium reabsorption at the proximal convoluted tubule, sodium ions enter the tubule cells from the luminal membrane through the sodium-potassium pump and exit through the basolateral membrane by facilitated diffusion.

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Answer:

because the male Scorpio is tutorial

It can be stated that both 18o and 16o isotopes are naturally occurring, but 16o is the most common of the two.

Isotopes are atoms of the same element that have different numbers of neutrons in their nuclei. Oxygen has three isotopes: 16o, 17o, and 18o. The number in the name of the isotope represents the sum of the protons and neutrons in its nucleus. 16o has 8 protons and 8 neutrons, while 18o has 8 protons and 10 neutrons.

The abundance of these isotopes in nature depends on their stability and how they are formed. Oxygen-16 is more stable than Oxygen-18, so it is the most common isotope found in nature. The reason for this stability is that it has a lower atomic mass, which results in less strain on the atomic nucleus. Therefore, the lighter 16o isotope is preferred in natural processes over the heavier 18o.

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Arteries are blood vessels that carry oxygen-rich blood away from the heart, while veins return oxygen-depleted blood back to the heart. Both arteries and veins often travel together and share the same name.

In more detail, arteries and veins have distinct structural differences. Arteries have thicker walls to withstand the higher pressure of blood flow, while veins have thinner walls and contain valves to prevent blood from flowing backward. The colors light red and light blue indicate that a blood vessel is traveling deep or posterior to bone. This means the vessel is located behind or beneath the bone, allowing for more efficient blood circulation. Overall, understanding the differences and relationships between arteries and veins is essential for studying the circulatory system. **Arteries** and **veins** are crucial components, and their shared names indicate their close anatomical relationships.

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Protein is the general term for the biochemical makeup of the antigens of the rh system.

Proteins are substantial biomolecules and macromolecules made up of one or more extended chains of amino acid residues. Among the many tasks that proteins carry out in living things include catalyzing metabolic processes, replicating DNA, responding to external stimuli, giving cells and organisms structure, and transporting substances. Proteins differ from one another principally in the order of their amino acids, which is determined by the nucleotide sequence of their genes. This causes proteins to fold into a certain 3D structure, which controls their activity. The term "polypeptide" refers to an ordered chain of amino acid residues. One or more lengthy polypeptides must be present in a protein.

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The cell organelles may have membranes, and some may not due to differences in their functions. Organelles with membranes perform various functions like enclosing and protecting the organelle’s content while separating it from the rest of the cell.

For instance, some membrane-bound organelles like the nucleus and mitochondria are specialized for their function and require a specific environment to carry out these tasks. Other organelles, such as ribosomes, do not require this protection, and so do not have a membrane.

In conclusion, organelles can be either membrane-bound or non-membrane-bound, and this is related to their functions. Membrane-bound organelles provide the specific environment required for their functions, while non-membrane-bound organelles do not need to be isolated from the rest of the cytoplasm.

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Answer:

Glucose, for your regular cellular respiration

Explanation:

The start of celllular respiration is glycolysis breaking down glucose. It usually is glucose, but lipids, carbohydrates, and proteins can be used too.

Biologists today do a lot of data collecting in the field versus killing all of their specimens to take back to the lab and study later, as Charles Darwin had to do while on his voyage around the world. This statement is true because they wabt data collection from the natural setting.

Field data collection is the process of gathering data in the natural environment, the data collection process involves collecting data by observing objects or objects in their natural habitats or locations. Field data collection can be used in many fields such as biology, geology, or even social science. Field data collection provides firsthand information to researchers, making it simple to collect data without having to spend a lot of money on lab research.

Fieldwork can also provide information on subjects and ecosystems that are not present in laboratory settings. With current technological advances, data collection devices have also become more sophisticated, allowing researchers to gather more precise data with ease. As a result, field data collection has become more effective in recent years. Biologists now collect data on the field rather than killing specimens and bringing them back to the lab to analyze later. The purpose of field data collection is to gather data from the natural setting.

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Answer:

to pull something up like a crane

Explanation:

Answer:

Cold temperatures cause many plants to become dormant.

Explanation:

This is asking for the effect, not cause. Cold temperatures make many plants die or dormant. Due to the cold, plants can't live or survive due to frozen water and minimal sunlight due to snow. Plants usually freeze through and die, but the plants that survive are eaten my herbivores/omnivores. This causes the competition for food. Fewer plants leads to fewer herbivores. Fewer herbivores lead to fewer carnivores and omnivores.

The competition for food among animals in temperate forests increases in the winter months because cold temperatures cause many plants to go dormant, which is present in the second option.

The temperature has an effect on the plants, such as the plants' height, and the plant density that is seen in the equatorial region is different from the plant density that is seen in the near polar regions. A plant can do photosynthesis and survive in a normal temperature, whereas in a harsh temperature, many adaptations are seen in the plants, and in an extreme cold climate, a plant becomes dormant as the enzymatic function of the cell is affected and hence competition for the food is seen among the animals.

Hence, the  competition for food among animals in temperate forests increases in the winter months because cold temperatures cause many plants to go dormant, which is present in the second option.

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