but why doesn’t the antibiotic just keep diffusing and inhibit growth all over the plate? more specifically, what is going on at the edge of the zones?

To prevent mould, keep humidity levels as low as you can during the day—no more than 50%.

Sometimes, air dampness or humidity (water vapour) can provide enough moisture for mould to thrive. Relative humidity (RH) indoors should be kept below 60%, ideally between 30% and 50%, if practical. Low humidity may help deter dust mites and pests like cockroaches.

For mould to flourish, it needs food, water, and air. Moreover, it needs a climate where it can survive. While these circumstances are necessary for mould to grow, they also allow its spores to remain latent until those conditions are met.

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Answer:

MOLECULE

Cells constitute tissues and atoms constitute molecules.

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Answer:

Damage to the skin or deeper tissues caused by sun, hot liquids, fire, electricity, or chemicals.

The degree of severity of most burns is based on the size and depth of the burn. Electrical burns, however, are more difficult to diagnose because they're capable of causing significant injury beneath the skin without showing any signs of damage on the surface.

Explanation:

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Answer:

D

Explanation:

homeostatic imbalance

Answer:

A. S phase

Explanation:

The cell cycle involves all the series of division events that occurs to an organism. Cell division, which can be meiosis or mitosis, involves two main stages viz: Interphase and M phase.

Interphase describes the resting stage of the cell i.e. when the cell is not dividing. The cell uses this time to prepare itself for the next round of division. Interphase stage further consists of three main phases viz: G1, S and G2 phases.

In the S phase or synthesis phase of Interphase, the cell duplicates its genetic material (DNA). Hence, an onion cell observed by a student to have loosely coiled chromatin depicting DNA duplication is in the S-PHASE.

Answer:

1. Carbon dioxide is released during the process of cellular respiration

2. Exchange of gases in plants takes place through the cracks in bark is Lenticel

3. Yeast undergoes aerobic respiration

4. The final products obtained in the anaerobic respiration are lactic acid, carbon dioxide, and water

5. ATP-Adenosine Triphosphate is the energy currency of the cells.

6. The breathing and respiration in woody stem of a plant takes place through lenticels

7. During Marathon race, we sometimes get painful contractions of leg muscles due to the accumulation of lactic acid

8. The process of respiration which releases energy takes place inside the cells of the body is known as cellular respiration

9. The mechanism by which organisms obtain oxygen from air and release carbon dioxide is called breathing.

10. Seat of respiration is mitochondria

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Answer:

Point mutation

Explanation:

Since it does not alter the amino acid, it would be a point mutation (unless if it did change the amino acid, it would be a frameshift mutation).

Answer:

I'm thinking an earthworm.

A leech is most likely to be closely related to Earthworms, as they both have segmented bodies and are multicellular organisms. The option is A.

A leech is a multicellular organism with a segmented body and does not have jaws or limbs. The terms to consider in this question are: - Multicellular - Segmented Body - Common Ancestor Based on these characteristics, the leech is most closely related to: Earthworm.

Both leeches and earthworms are multicellular organisms with segmented bodies and share a common ancestor. They belong to the phylum Annelida, which consists of segmented worms.

The other options listed (Amoeba, Sponge, Salmon, Lizard, Kangaroo, Cat, Placental, Hair, Jaws, Unicellular, Common Ancestor) do not share these characteristics with leeches.

Therefore, the correct option is A.

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Answer: My best guess would be Insulin

Explanation:

Insulin signals body cells to take up glucose from the blood, which returns blood glucose levels back to normal.

Answer:

competition n reproduce

Explanation:

When there are not enough resources in an environment to support all the offspring, there is competition to survive, and only some individuals are able to survive and reproduce.

Answer:

A

Explanation:

because water molecules require to move from a region of higher concentration to a region of lower concentration

The cell would take up the water when the concentration of water is greater outside than inside of the cell. The correct answer is option A.

Water travels by osmosis, a passive transport mechanism, from places of low solute concentration to those with high solute concentration.

Osmosis is the process by which water molecules pass through a cell's partly permeable membrane from a solution with a high concentration of water molecules to one with a lower concentration.

A plant cell will become turgid (firm) if the solution around it has a higher concentration of water molecules than the solution inside it. Water will enter the cell through osmosis. Turgor pressure is the term used to describe the pressure that builds up inside a plant cell when it becomes turgid. Turgid plant cells support the upright posture of a stem.

Thus, option A is the correct response.

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Answer: It may cause the bacteria to become resistant to them and one they are resistant then the antibiotics are ineffective against the bacteria. It is then more dangerous since new antibiotics will need time.

Explanation:

Explanation:

If you take antibiotics for the wrong reason(s) or if you take them too often it can change bacteria so much, that antibiotics have a reduced effectiveness against them, or stop working against them all together.

The so called "bacterial resistance" or "antibiotic resistance" is a real thread to humans. Some bacteria have turned out to be resistant to even the most powerful antibiotics available. Antibiotic resistance is a growing problem.

Suppose you get infected with such resident bacteria, it means there is no longer an effective treatment by using antibiotics.

*EXTRA*

If left "un treated", the bacteria can grow, more or less, with unlimited exponential growth. In such scenarios, any "simple" bacterial infection, could turn out to be fatal.

Often the biggest problem is the lack of time to find out exactly what type of bacteria is making the patient ill. Because there are so many different bacteria, it is impossible to tell what is the right one without deduction and, that takes time (to grow visible cultures in the laboratory). Sometimes a patient might be already critically ill, in such cases, the doctor would want to start the treatment immediately, which could mean they HAVE TO start admitting a broad-spectrum antibiotic, to hopefully battle that group of different bacteria, which hopefully included the one that is making the patient ill. But if that specific bacteria turns out to be resestant, then that poses a very serious problem. Possible a fatal one, since the time is up, and the bacteria keep growing in numbers, roughly doubling in numbers every hour...

Gram positive bacteria are more prevalent than gram negative bacteria in the skin flora primarily due to their structural and physiological characteristics.

Gram positive bacteria have a thicker peptidoglycan layer in their cell wall, which provides protection and enables them to better withstand the dry, salty, and acidic conditions present on the skin. Additionally, many gram positive bacteria, such as Staphylococcus and Corynebacterium species, have specialized adaptations that allow them to effectively colonize and thrive in the skin environment.

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Proteins are macromolecules composed of several amino acids joined by peptidic bonds. The sequence of amino acids determines the protein's function, and the structure determines its stability. 1) amine group. 2) peptidic bond. 3)  amino acids. 4) carboxyl-group. The amino acid sequence determines the function of the molecule.

Proteins are amino acid polymers linearly arranged and connected by peptidic bonds. These molecules characterize by their different structures.

Protein functions depend on the amino acid sequences. Proteins with different functions have different sequences. And among species, proteins with similar functions have similar structures.

In the exposed example, the polymer is a protein. Labels are as follows,

1) Amine group

2) peptidic bond

3) Amino acids

4) Carboxyl group

Primary structure ⇒ amino acid sequence: Gly, Ile, Vale, Cys, Glu... and so on.

This sequence is what determines the protein's function. Proteins with different functions have different sequences.

Secondary structure ⇒ the chain folds and adopts a new conformation in which aminoacids from different segments join by hydrogen bonds.

Tertiary structure ⇒ Not shown in the image. This is the three dimensional structure that makes the molecule more stable.

Quaternary structure ⇒ Not shown. There is only one subunit in this protein.

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Scientists investigated the effect of oxygen levels on the net rate of carbon fixation in two types of plants.

The net rate of carbon fixation refers to the overall rate at which plants convert carbon dioxide (CO2) into organic compounds through photosynthesis. In this study, researchers examined how different oxygen levels affected this process in two types of plants.

Photosynthesis involves two main processes: the light-dependent reactions and the light-independent reactions (also known as the Calvin cycle). During the light-dependent reactions, oxygen is produced as a byproduct, while the light-independent reactions involve the fixation of carbon dioxide into organic molecules.

The oxygen levels in the environment can affect the net rate of carbon fixation in plants. Higher oxygen levels can inhibit the activity of the enzyme RuBisCO, which is crucial for the fixation of carbon dioxide. This inhibition can lead to a decrease in the net rate of carbon fixation. However, different plants may have different abilities to adapt to varying oxygen levels. Some plants, known as C4 plants, have mechanisms that minimize the inhibition of RuBisCO by oxygen, allowing them to continue fixing carbon efficiently even under higher oxygen conditions.

By investigating the effect of oxygen levels on carbon fixation in different types of plants, scientists can gain insights into the adaptations and physiological mechanisms that enable plants to thrive in various environments.

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Answer:

Minerals

Explanation:

When comparing mitosis and meiosis, the statement "homologous chromosomes do not pair up" is not correct. In meiosis, homologous chromosomes do pair up during prophase I of meiosis I. This pairing is known as synapsis and allows for the exchange of genetic information between homologous chromosomes, known as crossing over.

The other comparisons listed are correct. Mitosis results in two daughter cells, while meiosis results in four daughter cells. Mitosis occurs in somatic cells, while meiosis occurs in the gonads (ovaries and testes). Mitosis involves one cell division, while meiosis involves two cell divisions. Lastly, mitosis results in diploid daughter cells (having the same number of chromosomes as the parent cell), while meiosis results in haploid daughter cells (having half the number of chromosomes as the parent cell).

Understanding the differences between mitosis and meiosis is important for understanding the processes of growth and reproduction. Mitosis is involved in the growth and repair of body cells, while meiosis is involved in the production of gametes (sperm and eggs) for sexual reproduction. By understanding the similarities and differences between these processes, we can better understand the complexities of life and the diversity of living organisms.
Based on the provided terms, here's a concise answer to your question:

The comparison "homologous chromosomes pair up <----> homologous chromosomes do not pair up" is not correct when comparing mitosis and meiosis.

In mitosis, homologous chromosomes do not pair up. This process occurs only in meiosis during the prophase I stage, where homologous chromosomes come together to form tetrads, exchange genetic material through crossing over, and ultimately contribute to genetic diversity in offspring. The other comparisons mentioned are accurate:

1. Two daughter cells (mitosis) <----> Four daughter cells (meiosis)
2. Occurs in somatic cells (mitosis) <----> Occurs in the gonads (meiosis)
3. One cell division (mitosis) <----> Two cell divisions (meiosis I and II)
4. Diploid daughter cells (mitosis) <----> Haploid daughter cells (meiosis)

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Answer:

Your Thyroid gland

Explanation:

A round gland found in your neck. Known for keeping your energy levels up and your height as well.

Chromosome crossover increases genetic variability by giving offspring chromosomes that differ from those of their parents.

The degree of genetic variation in a population is significant because natural selection depends on different alleles to change their frequencies for the better or worse.

Crossover is a process that results in fresh allele combinations in the gametes (egg or sperm) produced, assuring genetic diversity in any offspring produced.

Meiosis, also known as crossing over or recombination, is a process in which nonsister chromatids swap chromosomal regions. Cross-pollination creates new gene combinations in the gametes that are not present in either parent, increasing genetic diversity.

A species' genetic diversity is largely a result of meiosis. Two processes—independent assortment and crossing over—are the main means by which it achieves this (recombination).

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Answer:

osmosis is a special type of diffusion that is the movement of WATER particles from an area of high concentration to and area of low concentration across a semi-permeable membrane

Explanation:

Answer:

Function and structure are related, because of a certain structure a living thing make contain makes the object function the way it does. There are a lot of structural future in humans, plants, animal and all living things.

Explanation:

Answer: Biomagnification refers to the process by which the concentration of a contaminant increases as you move to higher trophic levels in a food chain or food web. In other words, as organisms consume other organisms, the contaminants present in the prey accumulate and become more concentrated in the bodies of the predators.

To understand this process, let's consider an example involving a water ecosystem. Suppose a pollutant is released into the water, such as a pesticide or heavy metal. The primary producers, such as algae or aquatic plants, absorb small amounts of the contaminant from the water. As herbivorous organisms consume these primary producers, they ingest the contaminants along with their food.

Since the contaminant is not easily broken down or eliminated from the organisms' bodies, it accumulates over time. As a result, the concentration of the contaminant becomes higher in the herbivores than in the primary producers. Now, when carnivorous organisms consume the herbivores, they not only accumulate the contaminant from their own food but also from all the prey they have consumed. This leads to an even higher concentration of the contaminant in the carnivores.

Therefore, biomagnification describes the phenomenon where the concentration of a contaminant increases significantly as you move up the food chain or trophic levels. The highest concentration of contaminants is often found in top predators, such as large fish, birds of prey, or mammals, which can have adverse effects on their health and reproductive capabilities.

It's important to note that biomagnification primarily occurs for persistent and non-biodegradable contaminants that cannot be easily metabolized or excreted by organisms. These contaminants are often lipophilic (fat-soluble), which allows them to accumulate in fatty tissues and remain in the organism's body for long periods, leading to biomagnification.

Explanation:

Answer:

B

Explanation:

Answer: D) recombinant DNA

Explanation:

Answer:

During this process the messenger RNA and the transfer RNA are manufactured

Explanation:

These RNAs are necessary to be able to comply with the formation of proteins, since they read the genetic code and after this they assemble the reading to make proteins of structure, function and support.

This is how cells when dividing or multiplying separate their genetic code by replicating.

Explanation:

In thermoplastics, the arrangement of monomeric units is linear and in thermosetting plastics, it is cross-linked. Thermoplastics are usually soft, weak and less brittle, so can get soften on heating and stiffen on cooling. They can be melted, remoulded and recycled easily.

Answer:

During exercise your cells need energy to function. in order to do so they harness it through ATP. In order to get ATP the cells convert it to ADP usually through aerobic respiration. Aerobic respiration requires oxygen to function and the cells will use up all their oxygen stores for it. Cells will get more oxygen when the exercise has been completed through the pulmonary system delivering oxygenated blood to the cells and taking away the used CO2 rich blood.

Answer:

Enough Evidence on the theory

Explanation:

If enough evidence accumulates to support a hypothesis, it moves to the next step — known as a theory — in the scientific method and becomes accepted as a valid explanation of a phenomenon.

Answer: When enough evidence is presented to support a hypothesis it becomes a theory

Explanation: I hope it helps!

The kitten period, which lasts from 0 to 6 months of age, is the youngest stage of a cat's existence, and mitosis is responsible.

Mitosis is responsible for the growth of the organism makes somatic cells for the body and is necessary for the organism's life span.

Meiosis, often known as this procedure, is a component of sexual reproduction in cats (and in humans, dogs etc).

Therefore, mitosis is responsible, for a kitten becoming a cat, which is the growing phase in a cat's life span.

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