how do mutations and natural selection lead to resistant populations of bacteria

Answer:

The answer is energy from the sun, cord grass

Explanation:

All food chains start with a producer (plant life,) which get their energy from the sun.

It isn't cord grass, sunfish because sunfish are predators & don't eat cord grass.  It isn't energy from sun, copepods because it's missing your producer.  It isn't copepods, ocean sunfish because you are missing the producer.

Answer:

C. Grasslands

The separation of North and South America by rising sea levels would result in changes in the interaction between the biosphere and the hydrosphere. Disrupted migration patterns, altered nutrient distribution, and changes in habitat availability would affect the biodiversity and ecological dynamics in the marine ecosystem.

If rising sea levels were to separate the continents of North and South America, one sphere that would interact differently with another sphere is the biosphere and the hydrosphere.

The biosphere refers to all living organisms and their interactions with the environment, while the hydrosphere encompasses all water bodies on Earth, including oceans, lakes, rivers, and groundwater. The separation of North and South America by rising sea levels would result in significant changes in the distribution and connectivity of marine habitats, impacting the biodiversity and ecological dynamics in both spheres.

With the separation of the continents, marine species that depend on migratory patterns, such as marine mammals, fish, and sea turtles, may face challenges in their natural movement and breeding cycles. Disrupted migration routes and barriers created by the rising sea levels could lead to isolation or fragmentation of populations, affecting their genetic diversity and long-term survival.

Furthermore, the change in the physical geography due to the separation could alter oceanic currents and water circulation patterns. This, in turn, would affect nutrient distribution and primary productivity in the water column, influencing the food webs and species interactions within the marine ecosystem. The availability of specific habitats, such as coastal wetlands and coral reefs, could also be affected, impacting the biodiversity and ecological services they provide.

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Answer:

The options are

A. Cooperation

B. Intercession

C. Intervention

D. Codependence

The answer is B. Intervention

Explanation:

The suitable method used by family and friends to help an alcoholic confront the disease is Intervention. These set of people will help him understand the dangers of being an alcoholic and ensure that they help him avoid the triggers that makes such individual drink excessively.

They want to help him overcome the problem so cooperation and codependence is out of context. Intercession isn’t a strict form of confronting a problem such as this.

Each of the claims is true. Let's look at the following as an explanation for this:

A wave's energy is directly inversely related to its frequency. As a result, as frequency increases, wavelength decreases and wave energy increases. Solar radiation, which is a subset of the vast range of energy known as the electromagnetic radiation spectrum, is how the entire amount of solar energy that reaches the Earth. Infrared, radio waves, X-rays, gamma rays, ultraviolet light, and visible light are all types of solar radiation. One technique to transport heat is by radiation.

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Answer:

Energy in an ecosystem: is part of an open system, is recycled and reused, is transferred through the food chain and is lost as heat.

Answer:

The Calvin Cycle

Hope this helps.

carbon fixation

Explanation:

Carbon dioxide is converted into sugars in a process called carbon fixation; photosynthesis captures energy from sunlight to convert carbon dioxide into carbohydrate.

Answer:

homeostasis can be defined as any self regulating process by which biological system to maintain stability while adjusting to condition

Homeostasis can be defined as the state of steady condition. It is maintained by the hypothalamus of brain.

Homeostasis can be referred to as the state of steady internal, physical, and also the chemical conditions which are maintained constant by the living systems. This is the condition of optimal functioning for the living organisms and this includes many variables, such as body temperature and fluid balance, and this being kept within the certain pre-set limits and conditions.

Homeostasis in the human body can be defined as any self regulating process by which the different biological systems maintain the stability while adjusting to environmental conditions.

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Answer:

The crane has a sharp and pointed beak adapted for catching and grasping prey. The sharp beak allows the crane to effectively stab and pierce its prey, such as fish, frogs, or small animals. The pointed shape helps the crane to accurately target its prey and secure a firm grip.

On the other hand, the duck has a flat beak, which is better suited for its specific feeding habits. Ducks are primarily filter feeders, and their flat beak enables them to sift through water or mud to collect small organisms, insects, and plants. The flat beak acts like a sieve, allowing the duck to strain out food particles while retaining water.

The difference in beak shape between the crane and the duck reflects their distinct feeding strategies and ecological roles. Each species has evolved its beak shape to optimize its ability to capture and consume the specific types of food sources available in their respective habitats.

The pressure would be changed to 4 atm in the machine to bring 500 ml of air into the lungs.

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Answer: Antibiotics are chemicals which, in low concentrations, can selectively kill or inhibit the growth of most pathogenic bacteria and are not harmful to humans.

Explanation:

Neosporin is a type of antibiotics which is used for the treatment or prevention of mild superficial infections. It consists of three active component, hence the name Triple antibiotic ointment. These active components, their mode of action and side effects include:

--> NEOMYCIN : This is one of the active components of Neosporin which inhibits the protein synthesis of an invading pathogenic bacteria through irreversible binding to the 30 S ribosomal subunit of susceptible bacteria. Their MODE OF ACTION is bactericidal meaning that the effect it has on the protein synthesis inhibits it's growth leading to the death of the bacteria.

SIDE EFFECTS: it can cause irritation, burning, itching, rash redness when applied topically.

--> POLYMYXIN: This is one of the active components of neosporin which attacks the invading pathogenic gram negative bacteria. In its mode of action, is the ability to combine with and disorganise structures of the bacterial cell which are responsible for the maintenance of the osmotic equilibrium of the cell thereby exposing the underlying peptidoglycan layer to lysozyme.

SIDE EFFECTS: Burning, redness, or irritation of the skin may occur.

--> BACITRACIN: This is also one of the active components of Neosporin. In its mode of action, it inhibits bacterial cell wall synthesis. This is achieved by preventing the final dephosphorylation step in the phospholipid carrier cycle, which interferes with the mucopeptide transfer to the growing cell wall.

SIDE EFFECTS: it may cause rash, itching/swelling (especially of the face/tongue/throat).

These three active components of Neosporin are combined to broaden the antibacterial spectrum. This means that at least one of the active components will effectively kill an invading pathogenic bacteria through its unique mode of action.

Answer: In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure

Explanation:

The pea plant's alleles segregate during meiosis, passing one allele for the dominant green pod color into each gamete. This is in accordance with Mendel's law of segregation.

The correct option is OC: One allele for green pod color moves into each gamete. The pea plant mentioned in the problem is homozygous for green pod color which is dominant over yellow. In the process of meiosis, the alleles for a particular trait segregate so that each gamete receives only one allele. Since the plant is homozygous for the dominant green pod trait, all its gametes will contain the allele for green pod color.

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Answer:

The amount of urine an average human excretes in a day is about 800-2000mL if the normal fluid intake is about 2L per day.

Answer:

To withdraw ATP from food

Explanation:

Answer:

Deflation

Explanation:

got it right on edge2020

The process that involves wind moving loose sediments is the deflation. Deflation is further described below.

Deflation is a type of wind erosion that involves the displacement of movement of loose materials from flat dry and non cemented surfaces such as the deserts and dry lakes.

The wind is the major factor that causes deflation in wind erosion, therefore the stronger the wind the bigger the pieces of sediments the wind can pick up.

Therefore,the process that involves wind moving loose sediments is the deflation.

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Answer:

Biotic factors include plants, animals, fungi, algae, and bacteria. Abiotic factors include sunlight, temperature, moisture, wind or water currents, soil type, and nutrient availability. Ocean ecosystems are impacted by abiotic factors in ways that may be different from terrestrial ecosystems.

Explanation:

Hey mate,this is the correct one!

The usage of synthetic plant hormones for the modification of plant growth can have environmental implications.

Factors to consider

1. Ecotoxicity: Synthetic plant hormones, if not properly regulated or used in excessive amounts, can pose risks to non-target organisms and ecosystems. They may affect the growth and development of other plants, beneficial insects, and microorganisms, potentially disrupting ecological balance.

2. Soil and Water Contamination: Improper application or disposal of synthetic plant hormones can lead to soil and water contamination. Runoff from treated fields or improper disposal of unused hormones may introduce these compounds into water bodies, potentially affecting aquatic organisms and overall water quality.

3. Resistance and Persistence: Repeated and excessive use of synthetic plant hormones can contribute to the development of resistance in target plant species. This can lead to the evolution of herbicide-resistant weed populations, requiring higher doses or different chemicals to achieve the desired effect. Moreover, some synthetic hormones may persist in the environment for extended periods, potentially impacting subsequent crops or natural vegetation.

4. Non-target Effects: Synthetic plant hormones may influence the growth and development of unintended plant species, leading to unintended consequences such as changes in biodiversity, alteration of natural plant communities, or interference with the natural ecological succession.

5. Human Health Concerns: The potential impacts of synthetic plant hormones on human health are an area of ongoing research. While these hormones are generally considered safe for use in agriculture when used according to regulations, there may be concerns related to exposure, residues, or indirect effects on food quality and safety.

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Answer:

Step 1: Connect the light microscope to a power source. ...

Step 2: Turn the revolving nosepiece so the lowest objective lens is in position.

Step 3: Mount your specimen onto the stage. ...

Step 4: Use the metal clips to keep your slide in place.

Explanation:

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Answer:

A. Incomplete Dominance

Explanation:

In flowers, incomplete dominance is a presentation of an "in between" color. In this case, if the parental flowers can be either blue or white, but produce light blue offspring... that would be incomplete dominance.

Answer:

it is 6% higher than the theoretical probability.

Explanation:

we start with out experimental.

84 times heads out of 150.

84/150 = 56.

=56%

now for theoretical.

since there are 2 sides, there are 2 chances of randomly getting heads.

1/2 = 50%

56% > 50%

therefore your answer is that it is 6% higher. hope my explanation helps!

The two methods that allow fish to maintain water balance in saltwater are pumping out salt through the gills and absorbing water into the body by osmosis.

In saltwater, the concentration of dissolved salts is higher in the surrounding water than in the fish's body cells. To maintain water balance, fish have developed two main methods:

1. Pumping out salt through the gills: Fish possess specialized cells in their gills that actively pump out excess salts from their bodies. This process helps maintain a lower salt concentration within the fish's body, preventing dehydration and maintaining water balance.

2. Absorbing water into the body by osmosis: Osmosis is the movement of water from an area of lower solute concentration to an area of higher solute concentration through a semi-permeable membrane. Fish have a protective layer of skin that allows water to be absorbed into their bodies while preventing the entry of excessive salts.

By absorbing water through their skin, fish replenish the water lost to the surrounding saltwater, helping to maintain their internal water balance.

These two mechanisms work together to enable fish to survive in saltwater environments. By actively pumping out salts and absorbing water, fish can regulate their internal salt concentration and prevent dehydration, ensuring their overall water balance is maintained.

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A geologic feature with at least three layers that demonstrates the principle of lateral continuity is called a Grand Canyon.

According to the lateral continuity concept, sedimentary rock strata were formerly continuous over wide areas. As a result, any layer discontinuities must be the result of erosion or other geologic processes.

The layers in this sketch are continuous laterally, which means they extend in all directions while holding onto their thickness and makeup. We can presume that the layers go farther in all directions even though we can only see a small section of them in this sketch. This is significant because it enables geologists to link the age and make-up of distinct rock layers.  

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Answer:

cellular respiration

the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water.

Answer:

HCl

Explanation:

Some easy ways to identify if a compound is an acid is to locate an H+ proton, while basic compounds will have an OH- ion.

Examine all the choices:

A) NaOH

Already, we see that OH is here, so it's a base, not an acid. Eliminate.

B) NaCl

This doesn't have an H+ or an OH-, so it's not an acid. It's actually a salt. Eliminate.

C) HCl

This does have an H+, so it's an acid.

D) \(CH_4\)

Although this does have an H, it's a hydrocarbon - an organic compound. So, it's not an acid.

The answer is thus C.

~ an aesthetics lover

A pipette of range 1.0-10uL is the most appropriate for taking a volume of 9 uL. So the correct option is A

In the lab, micropipettes are used to transfer tiny amounts of liquid, typically less than 0.1 uL. In addition to other labs, they are most frequently employed in chemistry, biology, forensics, pharmaceutical, and drug development. There are various sizes of micropipettes commonly used in the laboratory.

Micropipettes vary in size and volume dispensed, and based on those two factors, they also need various pipette tips. Micropipettes aspirate liquid using a disposable pipette tip; take note that only the tip of the pipette comes into touch with the solution. For each sample, a fresh tip is used to avoid cross-contamination.

The quality of a pipette tip is the most important factor to consider. Whether one is searching for a filter, low retention, or gel loading tip, it should be made sure that the pipette tip will function as accurately and precisely as the micropipette. The purity of your pipette tips should be checked.

Therefore the correct option is A.

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The events or conditions which can harm the muscles of the human body include the following below:

These are referred to as soft tissues which contract together to produce a force and also aid different types of movement of body parts such as the legs, hands etc. Muscles which are found in the heart are responsible for the pumping of blood to different parts of the body cells.

Factors such as drugs, injury etc can cause harm to the muscles because certain types can cause cramping and pain in the affected area which is why the aforementioned options are the correct choices.

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