Development of targeted recombinant polymers that can deliver siRNA to the cytoplasm and plasmid DNA to the cell nucleus.

Answer:

Their main difference is how they form the daughter cells during cytokinesis. During that stage, animal cells form furrow or cleavage that gives way to formation of daughter cells. Due to the existence of the rigid cell wall, plant cells don't form furrows.

Explanation:

The loss of biodiversity could affect humans by leading to the loss of potential medicine, foods and products and is therefore denoted as option B.

This refers to the variations which exists between organisms which are present in different types of ecosystem.

Lack of variation means there will be shortage of organisms which have differences in their traits or features. This isn't ideal because these differences may be as a result of natural selection which makes them fitter therefore having more beneficial properties.

These are therefore the most appropriate ways in which the loss of biodiversity affect humans.

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Answer:

A. descent with modification.

Explanation:

I hope this helped you!!

Answer:

insulin decrease blood sugar (c.)

The decrease in the amount of nitrogen and phosphorus would lead to a decrease in primary production in the aquatic ecosystem. This is because nitrogen and phosphorus are essential nutrients that are necessary for photosynthesis, which is the process by which primary producers create organic matter.

Primary producers, such as algae and aquatic plants, require nitrogen and phosphorus to grow and carry out photosynthesis. Without these nutrients, their growth and productivity would be limited. This would lead to a decrease in primary production, which would have cascading effects throughout the food web.

Consequently, the decrease in primary production would affect the entire community, including primary consumers, which would also experience a decrease in their populations. Additionally, a decrease in primary production would lead to a decrease in atmospheric oxygen, as photosynthesis is a primary source of oxygen in the atmosphere.

A decrease in the amount of nitrogen and phosphorus would have significant negative impacts on the aquatic ecosystem, leading to a decrease in primary production, primary consumer populations, and atmospheric oxygen levels.

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Answer:

The correct answer is - Deltoid

Explanation:

Deltoid muscles are thick triangular muscles that help in raising and rotating arm covers shoulder joints. It originates lateral third of the clavicle, inferiorly along the spine of the scapula to the acromion.

Deltoid muscles provide actions that include flexion and medial rotation, abduction, and extension, and lateral rotation at the shoulder joint. Deltoid means triangle or that has three sides as it has three originating sides.

Answer:

Fossils are formed in many different ways, but most are formed when a living organism (such as a plant or animal) dies and is quickly buried by sediment (such as mud, sand or volcanic ash).

Answer:

meiosis

Explanation:

meiosis occurs in reproductive organs

Based on the information provided, The most likely cause of these symptoms is meningitis, which is an inflammation of the membranes surrounding the brain and spinal cord.

Encapsulated Gram-negative rods commonly associated with meningitis include bacteria like Haemophilus influenzae and Neisseria meningitidis. These bacteria have a capsule that helps them evade the immune system and cause infection. To confirm the diagnosis and identify the specific bacteria causing the infection, a cerebrospinal fluid culture is performed. The presence of encapsulated Gram-negative rods in the culture suggests a bacterial cause.
It is important to note that meningitis can be a serious condition and requires prompt medical attention. Treatment typically involves the administration of antibiotics to eliminate the bacteria causing the infection.

Therefore the cause is meningitis.

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The methods that are involved in making a smear are staining the slide background and then applying cells and applying a liquid suspension to a cover slip.

i) Take bacteria by the loop. If it is solid media, add water to the slide and mix it with culture. If it is liquid media, no need to add water to the slide.

ii)Spread the taken culture on the coverslip.

ii)The smear is then fixed by drying. The drying can be done by room temperature, hairdryer, or by keeping it on warmer slides.

iv)Now, the smear is ready.

The fixed smear can be stained and visualized. This method is followed in gram staining as well. The staining procedure is not involved in smearing.

So, the correct options are B and D.

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Answer:

2,7. 4,6

Explanation:

2 C2H6. +. 7O2. ==. 4. CO2. +. 6 H2O

Note. In such questions balance C first then H and finally O

It will be easier

During muscle cell contractions, potassium ions (K+) get expelled from the cell due to an increase in permeability of the plasma membrane.

This, in turn, leads to an increase in the concentration of potassium ions in the extracellular fluid, thereby creating an electrochemical gradient favoring the entry of K+ back into the muscle cell, i.e., through the T-tubules.

While at rest, the concentration of K+ within the cell is much higher than the concentration in the extracellular fluid. However, when muscle cells undergo frequent periods of contractions, the concentration gradient may reverse, resulting in the buildup of K+ within the T-tubules.

This, in turn, can disrupt the normal electrochemical gradient across the membrane, leading to a decrease in the transmembrane potential and, subsequently, muscle fatigue.The buildup of K+ in the T-tubules can also interfere with excitation-contraction coupling by disrupting calcium ion release from the sarcoplasmic reticulum (SR).

This, in turn, can impair muscle contractility, leading to weaker contractions and decreased force production.In conclusion, the buildup of K+ in the T-tubules can lead to muscle fatigue, weakened contractions, and decreased force production.

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The process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called a mutation.

A mutation is a sudden and lasting alteration in the DNA sequence that can influence genetic variation. Changes in the DNA sequence can influence phenotype, which may or may not have an effect on an organism's fitness. Mutations occur spontaneously, either from errors in DNA replication or from exposure to mutagenic agents. Mutations may happen in either coding or non-coding regions of the DNA, and they can be either silent or expressed.

Evolution is a natural process that results in the gradual change of inherited characteristics in populations over generations. It is the process of alteration in the inherited characteristics of species over successive generations. In other words, it is the process of gradual changes that happen to species over time as they adapt to their environments. It can be defined as a change in the gene frequency in a population over time.

Types of Evolution 1. Natural Selection 2. Genetic Drift 3. Gene Flow 4. Mutation 5. Non-Random Mating 6. Admixture 7. Mutation Pressure 8. Genetic Draft 9. Bottleneck and Founder Effect 10. Sexual Selection the process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called a mutation.

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Answer:

Unavailability of biological agent.

Explanation:

The main cause of this problem is the unavailability of biological agent for that insects in that environment. biological agents are the organisms that controls other insects population by feeding on them. When a new insect is introduced in a particular environment and no bioagent is present for it, it greatly damaged the crops and destroys the field of the farmer.

Answer:

hair grows from the root at the bottom of the follicle under your skin . the blood in your scales goes into the follicle and supplies oxygen add nutrients to the hair root which helps your hair grow. as your hair grows it will push through the skin and pass by an oil glands.

I believe it to help you???

Answer:

Option A

Explanation:

In this case the two species of squirrels have evolved when their combined population got divided into parts and was separated as a cause of natural calamity i.e Colorado River's erosion of the Grand Canyon, thereby forced to live in two different geographies and hence evolve differently from each other. The two geographies mentioned above remain disconnected by any natural barrier thereby restricting successful mating of the two population  groups of squirrels.

hence, option A is correct

Answer:

Allopatric Speciation is Correct for all future users.

Explanation:

Answer: light is a eletromagnetic wave, no it does not need a medium

Explanation:

have a good day lad :)

Answer:

light arent a specific "type" of wave, but it refers to any wave/wavelength in the electromagnetic spectrum

and yes, it needs a medium, just like sound waves

Answer:

1)•Plants do not have a circulatory system.

•Humans have a well defined circulatory system.

2)•transportation in plants occurs through specialised tissue xylem and phloem.

•Transportation in humans occurs through a netwotk of blood vessels such as artery vein capillary.

3)In plants substances transported are water, minerals, sugars and amino acid.

•In humans substances transported are glucose, glycerol, minerals, vitamins, fatty acids, amino acids and hormones.

4)Transportation in plants in controlled by opening and closing of stomata.

•Transportation in humans is controlled by constriction or dilation of blood bessels.

-->■Transportation in humans is more effective than the plants because in humans there is a well defined circulatory system which is highly regulated.As transport occur through blood vessel , transportation can be regulated by dilation or constriction of blood vessel.But plant do not have such circulatory system.

BRAINLIST PLS

Answer:

In order to ascertain the total magnification when viewing an image with a compound light microscope, take the power of the objective lens which is at 4x, 10x or 40x and multiply it by the power of the eyepiece which is typically 10x.

Magnification on a light microscope is calculated by multiplying the magnification of the eyepiece lens and the objective lens.

It is a tool used in biological labs that uses visible light for the detection of microscopic materials. The microscope focuses on extremely small objects, invisible to the unaided eye and makes them visible.

The lenses are used to focus on a specimen and light is used to enlighten it. With respect to lenses, it also has an eyepiece lens and an objective lens like the compound microscope.

Unlike the compound microscope, which uses the reflecting light of a mirror to enlighten the specimen, the light microscope uses visible light.

There is a condensor between the stage and the light source to help focus the light on the slide.

The magnification of a microscope is the combination of an eyepiece lens, through which the observer sees and the objective lens, focusing on the object.

Therefore, magnification is obtained by multiplying the lower of an eyepiece lens and an objective lens.

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Answer:

Biodiversity

Explanation:

Biodiversity is the variety of life in a habitat or ecosystem

Nanomaterials are synthesized using different techniques that include physical, chemical, and biological methods. The type of method chosen depends on the application, morphology, and structure of the nanomaterial that is required.

Physical methods used in the synthesis of nanomaterials include laser ablation, high-energy ball milling, electron beam lithography, and thermal evaporation.

Chemical methods involve the reduction of precursors to form nanomaterials. Chemical reduction methods used include sol-gel, hydrothermal synthesis, co-precipitation, and solvothermal synthesis.

Biological methods involve the use of biological organisms such as bacteria, yeast, or fungi to produce nanomaterials. The synthesis of nanomaterials using biological organisms is referred to as green synthesis. The advantage of green synthesis is that it is cost-effective and environmentally friendly.

Nanomaterials synthesis is important in the development of new products and technologies in different fields, including energy, medicine, and electronics. It is also used in the production of catalysts, sensors, and biomedical applications.

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Answer:

cell wall chloroplasts

Cell walls and chloroplast are the organelles that are found in plant cells but not in animal cells A hard structure situated outside the cell membrane is called a cell wall and it is present in plant cells.

The cell wall supports and shields the cell's structure. Cell walls do not exist in animal cells.

Chloroplasts, specialized organelles involved in photosynthesis, are another component of plant cells. The pigment chlorophyll, which is found in chloroplasts, absorbs light energy and uses it to synthesize glucose.

The photosynthesis process cannot be performed by animal cells because they lack chloroplasts.

Hence, the chloroplasts and cell walls are the organelles that are present in plant cells but not in animal cells.

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Answer:

Magma.

Explanation:

This magma can push through holes or cracks in the crust, causing a volcanic eruption. When magma flows or erupts onto Earth's surface, it is called lava. Like solid rock, magma is a mixture of minerals.

The set of chromosomes in the diagram below which depicts nondisjunction is 21 and is therefore denoted as option A.

Nondisjunction is referred to as the failure of the chromosomes to separate, which produces daughter cells with abnormal numbers of chromosomes.

In the diagram given, set of chromosomes in the diagram below which depicts nondisjunction is 21 due to the abnormal length and properties observed when properly viewed thereby making it the correct choice.

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