have no effect on the host cell. cause acute infections. cause tumors to develop. are genetically unstable. are lytic viruses that kill the host cell.

Characteristics of Living Things

Living things are made of cells. Cells are the basic building blocks of living things.

Living things have movement. This movement can be quick or very slow.

All living things have a metabolism.

Living things grow.

Response to environment.

Reproduction.

Answer:

Characteristics of living things

There are seven activities which make organisms different from

non-living things. These are the seven characteristics of living

organisms.

1 Nutrition

Living things take in materials from their surroundings that they

use for growth or to provide energy. Nutrition is the process by

which organisms obtain energy and raw materials from nutrients

such as proteins, carbohydrates and fats.

2 Respiration

Respiration is the release of energy from food substances in all

living cells. Living things break down food within their cells to

release energy for carrying out the following processes.

3 Movement

All living things move. It is very obvious that a leopard moves but

what about the thorn tree it sits in? Plants too move in various

different ways. The movement may be so slow that it is very

difficult to see.

4 Excretion

All living things excrete. As a result of the many chemical

reactions occurring in cells, they have to get rid of waste products

which might poison the cells. Excretion is defined as the removal of

toxic materials, the waste products of metabolism and substances

in excess from the body of an organism.

5 Growth

Growth is seen in all living things. It involves using food to

produce new cells. The permanent increase in cell number and size

is called growth.

6 Reproduction

All living organisms have the ability to produce offspring.

7 Sensitivity

All living things are able to sense and respond to stimuli around

them such as light, temperature, water, gravity and chemical

substances.

Learn these seven characteristics of living organisms. They form

the basis of the study of Biology. Each one of these characteristics

will be studied in detail during the course. Whilst many other

things carry out one or more of the above processes, only living

organisms possess all of these characteristics.

Answer:

           Plant cell.                                    |                  Animal cell

______________________________|_____________________________

    1. Cell wall is present                         |   1. Cell wall is absent

   2.  cytoplasm is not as desnse          |   2. Cytoplasm is dense

   as animal cell                                      | 3. Valcoule is genrally absent but if

  3.A large vacoule is present              |   present they are smaller in size

  4.Plastids are usually present           |    4.  Plastids are absent

   5.centrosome is absent                    |  5. Centrosome is present

____________________________________________________________

Hope this helps :D

Answer:

Sodium chloride removes proteins from DNA and helps in DNA precipitation.

Explanation:

The Deoxyribonucleic acid (DNA) is negatively charged due to the highly polar phosphate groups that make up the phosphate backbone. The molecules of water are also highly polar and they have positive charge, thereby water molecules interact with the negative charges of the DNA. The sodium chloride generates temporary attraction forces between sodium (positive) ions and the DNA backbone (negative), thereby DNA can be disassociated from the aqueous layer. Moreover, sodium chloride helps to remove proteins (histones) that bound to DNA and also helps to maintain proteins in the aqueous layer.

Part One: Energy Pyramid

To create an energy pyramid for the described ecosystem, we need to consider the trophic levels and the flow of energy. The trophic levels represent different positions in the food chain, with energy being transferred from one level to the next. Here's an example of how we can construct an energy pyramid based on the provided information:

Trophic Level 1: Producers (Plants)

Trophic Level 2: Primary Consumers (Herbivores)

Trophic Level 3: Secondary Consumers (Carnivores)

Trophic Level 4: Tertiary Consumers (Top Predators)

In this case, the energy pyramid would have three trophic levels, starting with the producers (plants) at the base, followed by primary consumers (desert fox) in the middle, and secondary consumers (sand grouse) at the top. As there is no mention of tertiary consumers in the provided information, the energy pyramid would not have a fourth trophic level.

Part Two: Food Web

Based on the provided information, we can construct a food web for the field ecosystem. A food web represents the interconnected feeding relationships between different organisms in an ecosystem. Here's an example of how the food web could be constructed:

Primary Producers (Grasses)

Primary Consumers (Deer, Rabbits, Mice, Crickets)

Secondary Consumers (Mountain Lions, Hawks)

The food web illustrates the feeding relationships between organisms in the ecosystem. Primary producers (grasses) are consumed by primary consumers (deer, rabbits, mice, and crickets), which are then consumed by secondary consumers (mountain lions and hawks). Additionally, mice and frogs have a direct feeding relationship as mentioned in the description. Snakes, being tertiary consumers, prey on mice.

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Answer:

Part One: Energy Pyramid

To create an energy pyramid for the described ecosystem, we need to consider the trophic levels and the flow of energy. The trophic levels represent different positions in the food chain, with energy being transferred from one level to the next. Here's an example of how we can construct an energy pyramid based on the provided information:

Trophic Level 1: Producers (Plants)

- Cacti, sagebrush, and low trees

Trophic Level 2: Primary Consumers (Herbivores)

- Desert fox (feeds on plants)

Trophic Level 3: Secondary Consumers (Carnivores)

- Sand grouse (feeds on termites)

- Desert fox (potentially feeds on sand grouse)

Trophic Level 4: Tertiary Consumers (Top Predators)

- None mentioned in the description

In this case, the energy pyramid would have three trophic levels, starting with the producers (plants) at the base, followed by primary consumers (desert fox) in the middle, and secondary consumers (sand grouse) at the top. As there is no mention of tertiary consumers in the provided information, the energy pyramid would not have a fourth trophic level.

Part Two: Food Web

Based on the provided information, we can construct a food web for the field ecosystem. A food web represents the interconnected feeding relationships between different organisms in an ecosystem. Here's an example of how the food web could be constructed:

Primary Producers (Grasses)

- Deer (browsing on leaves)

- Rabbits (feeding on grass)

- Mice (feeding on grass and seeds)

- Crickets (feeding on grass)

Primary Consumers (Deer, Rabbits, Mice, Crickets)

- Mountain lions (predators of deer and rabbits)

- Hawks (predators of snakes, rabbits, mice, and frogs)

Secondary Consumers (Mountain Lions, Hawks)

- Snakes (prey on mice)

The food web illustrates the feeding relationships between organisms in the ecosystem. Primary producers (grasses) are consumed by primary consumers (deer, rabbits, mice, and crickets), which are then consumed by secondary consumers (mountain lions and hawks). Additionally, mice and frogs have a direct feeding relationship as mentioned in the description. Snakes, being tertiary consumers, prey on mice.

Explanation:

Yes, the instantaneous velocity of an object at an instant of time can be greater in magnitude than the average velocity over a time interval containing that instant.

Instantaneous velocity refers to the velocity of an object at a specific moment, whereas average velocity is calculated over a given time interval. The magnitude of velocity can change rapidly over time, so it is possible for the instantaneous velocity at a particular instant to be greater than the average velocity over a larger time interval.

For example, consider a car moving on a straight road. If the car starts at rest, then quickly accelerates to a high speed, the instantaneous velocity at the instant of acceleration could be much higher than the average velocity over a longer time interval, such as over the course of a minute.

In summary, the instantaneous velocity at a specific instant can be greater in magnitude than the average velocity over a time interval containing that instant, depending on the object's motion during that time interval.

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Animals with similar structures most likely have a common ancestor. Homologous structures are body parts or organs that are present in various species .

Body parts or organs that are identical in structure and function yet are found in various species are known as homologous structures. The notion of evolution by natural selection is supported by the idea that these structures share a common evolutionary ancestor. For instance, although though the forelimbs of diverse mammal species—including humans, horses, and bats—have varied tasks, they all share a similar bone structure. This resemblance shows that these animals shared a common ancestor during their evolution and that the forelimbs have changed over time to accommodate the unique requirements of each species. Homologous structures can be utilised to recreate the evolutionary history of a collection of animals and offer proof for the ties between species that have developed over time.

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Answer:

I think it's A but im not sure?

Answer:

D. Solvent, Solute, Solution

Explanation:

When you make chocolate milk, milk is the solvent, and the chocolate powder is the solute the mixture in now called a solution.

Leigh Syndrome is a rare genetic disorder that affects the central nervous system and its associated organs, including the brain, muscles, and heart.

Specifically, Leigh Syndrome impairs the ability of mitochondria to produce ATP, the energy source for most cells. This results in an energy deficit, leading to decreased energy production, which ultimately affects various cellular processes and can cause cell death.

It is caused by a malfunction in the cells responsible for energy production, such as those involved in cellular respiration.

It is caused by mutations in genes that are responsible for the production of proteins that are essential for cellular respiration. Cellular respiration is the process by which cells produce energy in the form of ATP (adenosine triphosphate) from the breakdown of glucose.

The mutations that cause Leigh syndrome disrupt the function of the mitochondria, the organelles that are responsible for cellular respiration. As a result, the cells are not able to produce enough ATP to meet their energy needs. This leads to a wide range of symptoms, including muscle weakness, movement disorders, and difficulty breathing.

In addition to affecting the central nervous system, Leigh syndrome can also affect other organs and tissues, such as the heart, liver, and kidneys. The severity of the disorder can vary from person to person, and there is currently no cure for Leigh syndrome.

Treatment typically focuses on managing the symptoms and providing supportive care to help improve the quality of life for those affected by the disorder.

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Answer:

What?

Explanation:

Answer:

Cell walls are structures that surround and protect the cells of some organisms. According to the web page context, cell walls can be found in:

Cell walls are not found in animals or most protists.

Answer:

Homologous structures have the same ancestry, but may no longer serve the same function. For example, the bones that make up human fingers were inherited from an ancestor that's shared by all mammals.

Answer: true

Explanation: Nonmetals are elements that generally do not conduct electricity. ... They are the elements located on the right side of the periodic table.

Answer:

C

Explanation:

Frequent hand washing can remove some of the antimicrobial secretions that naturally occur on our skin.

These secretions are produced by glands in our skin and are composed of various substances, including fatty acids, enzymes, and peptides, which can help to protect our skin from harmful microbes.

When we wash our hands with soap and water, we can remove these secretions along with dirt, oils, and any harmful microbes that may be on our skin.

While this can help to prevent the spread of disease, frequent hand washing can also lead to dryness and irritation of the skin, particularly if the soap used is harsh or if the hands are not properly moisturized afterward.

It's important to balance the need for frequent hand washing with the need to maintain the health and integrity of the skin.

Using mild, moisturizing soap and applying a moisturizer after washing can help to minimize the negative effects of frequent hand washing on the skin.

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Answer:

Answer

Explanation:

Eukaryotes are the cells that make up our bodies, plants and animals and all cellular organisms that contain their genetic material in a nucleus, have a cytoskeleton and contain organelles, such as mitochondria or cytoplasts. Eukaryotes are thought to have evolved from prokaryotes. Bacteria and archaea are classified as prokaryotes, a group of simple, single-cell organisms. Prokaryotes usually contain a single, circular deoxyribonucleic acid, DNA, molecule and lack a nucleus and intracellular organelles.

Answer:

1:(a) they possess transmittable characters.

2: (a)the trophic level.

Answer:

Explanation:

1 a

2 a

I hope this helps

1. The amount of seconds that the dolphin was out of water is of: 14.

2. The x-intercepts represent the times for which the dolphin hit the water.

3. The time it took from the dolphin to move to it's lowest point to it's highest is of around 8 seconds.

The graph is given by the height versus time, hence:

This means that the x-intercepts represent the times for which the dolphin hit the water.

Then the intervals in which the dolphin was out of water are of:

Hence around 7 + 7 = 14 seconds.

The lowest point and the highest point are given as follows:

Hence the time was of:

20 - 12 = 8 seconds.

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Answer:

transcription will not begin

Explanation:

rawrs! have a great day! :3

RNA polymerase is the main enzyme to start the transcription of DNA, if it fails to bind at the promoter start site of initiation, transcription will not initiate, hence option 2 is correct.

If RNA polymerase misses, one of the rRNA subunits cannot be transcribed from DNA. RNA polymerase and the transcription factors needed for transcription bind to the promoter region and start transcription.

Promoter sequences determine the direction of transcription and which DNA strand will be transcribed this strand is known as the sense strand, RNA polymerase produces RNA by following a DNA strand.

RNA polymerase is an enzyme that transforms a DNA sequence into an RNA sequence during the transcription process.

Therefore to start the initiation of transcription is a major step in the synthesis of RNA and using RNA polymerase fit is not bind to the promoter, transcription will not begin, hence option b is correct.

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The changes taking place at Zappos illustrates numerous concepts related to organizational structure. The Holacracy system being adopted by the company removes the traditional line of command; instead tasks are delegated by employees to “circles” which are then serviced by members of those circles.

It focuses on efficiency of operations, as decisions are made in a decentralized fashion. Furthermore, the organization encourages employees to engage in learning and development to reach their potential, which is complemented by the company’s employee-first mentality.

It is difficult to ascertain whether these changes have been successful in so far as it is too early to ascertain the long-term effects. While the initial reports from the media focus on the positive aspects such as improved communication, job autonomy and growth, it remains to be seen if the company will continue to succeed or fall flat.

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Answer:

I think it's A and D

Explanation:

Answer:

number 2 and number 3

Explanation:

Answer:

Grass

Explanation:

Grass produce their own food

Answer:

growth hormones lead to growth it humans during puberty

Answer:

bananas

Explanation:

healthy

The "tree of life" is a concept used in biology to depict the evolutionary relationships between all living organisms. The branches of the tree represent different species, and the trunk represents their common ancestry.

This concept is based on the theory of evolution, which states that all living organisms evolved from a common ancestor through the process of natural selection.

The idea of a tree of life originated from Charles Darwin's theory of evolution, which proposes that species evolved through the process of natural selection over long periods of time.

This theory is supported by evidence from the fossil record, comparative anatomy, and molecular biology. Scientists have been able to reconstruct the evolutionary relationships between species by comparing their physical and genetic characteristics.

The branches of the tree of life represent the different species that have evolved from the common ancestor over time. Each branch represents a lineage of species that share a common ancestor, and the length of the branch reflects the amount of time that has passed since the divergence of the species.

The more closely related two species are, the more closely they are positioned on the tree.

In conclusion, the branches of the "tree of life" all originate from a single trunk because all living organisms share a common ancestry and have evolved from a common ancestor through the process of evolution.

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Answer: Period

Explanation:

This is the time it takes for two crests to pass a given point. Should be memorised + in geography not biology.

A "k-mer" sequence in a DNA is just a sequence of k characters in a string (or nucleotides in a DNA sequence). Now, it is important to remember that to get all k-mers from a sequence you need to get the first k characters, then move just a single character for the start of the next k-mer, and so on. Effectively, this will create sequences that overlap in k-1 positions. There are a total of 65,536 different 8-mer sequences of DNA.

To calculate the number of different 8-mer sequences of DNA, we need to consider that each position in the sequence can have 4 different nucleotides: adenine (A), thymine (T), cytosine (C), and guanine (G). Since we are considering an 8-mer sequence, there are a total of 8 positions.

For each position, there are 4 possible nucleotides, so the total number of possible sequences is obtained by multiplying the number of choices for each position. Therefore, the total number of different 8-mer sequences is 4⁸, which equals 65,536.

It's important to note that the hint provided about 16 possible dinucleotides and 64 possible trinucleotides is not directly relevant to calculating the number of different 8-mer sequences. The number of dinucleotides and trinucleotides represents the number of possible combinations of adjacent nucleotides, but for an 8-mer sequence, we need to consider all possible combinations of nucleotides for each position.

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Answer:

A. the digestive, muscular, and respiratory

Explanation:

Muscle weakness affects the muscular system (muscles are in the muscular system) , stomach pain affects the digestive system (stomach is a part of the digestive system), and coughing affects the respiratory system (coughing hinders the ability to breathe properly).

Answer:

a

Explanation:

False When calcium ions (Ca2+) enter the synaptic terminal, it triggers various processes involved in neurotransmitter release.  

rather than the removal of neurotransmitter molecules from the synaptic cleft. Calcium influx into the synaptic terminal occurs in response to an action potential reaching the presynaptic terminal Once calcium ions enter the presynaptic terminal, they bind to proteins called synaptotagmins, which are located on the surface of synaptic vesicles containing neurotransmitter molecules.

This calcium-binding to synaptotagmins leads to the fusion of synaptic vesicles with the presynaptic membrane, causing the release of neurotransmitter molecules into the synaptic cleft through a process called exocytosis After neurotransmitter molecules are released into the synaptic cleft, they interact with receptors on the postsynaptic membrane, transmitting the signal to the target neuron. The removal of neurotransmitter molecules from the synaptic cleft is typically mediated by specific mechanisms, such as reuptake by presynaptic transporters or enzymatic degradation.

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Answer:

Cholesterol and steroid hormones. Cholesterol, an important component of cell membranes, is an amphipathic molecule because of its polar hydroxyl group. Cholesterol is also a precursor to the steroid hormones, such as testosterone and estradiol

Explanation: