which organism would have the greatest negative impact from the DDT?

Key examples of index fossils include several species of Trilobite ,which are an extinct group of marine animals whose hard-shelled bodies had three sections.

Index fossil, are any animal or plant preserved in the rock record and have  characteristic of a particular era of geologic time or environment. useful index fossil must be different or easily to identify, abundant, and should be available widely through out the geological time.

Index fossils are found mainly  in sedimentary rocks. They are an essential means in stratigraphy  studies in order to compare the geological ages of sedimentary rock formations. Examples are ammonites and graptolites.

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If the genetic code consisted of codons with 4 nucleotides, there could be 256 different codons possible.

The genetic code is a set of rules that living cells use to convert information encoded in genetic material into proteins. Each gene's code employs various combinations of the four nucleotide bases of DNA — adenine (A), cytosine (C), guanine (G), and thymine (T) — to spell out three-letter "codons" that specify which amino acid is required at each position within a protein.

A codon is a unit of three adjacent nucleotides that codes for an amino acid. Codons, which are three-letter nucleotide chains, make up the genetic code. Each codon represents a single amino acid.

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The frequency of triplet-repeat expansion would rise in the presence of a defective DNA polymerase that boosts strand slippage.

A DNA polymerase belongs to a group of enzymes that catalyzing the synthesis of Dna strands using nucleoside triphosphates, which are the basic building blocks of DNA. These enzymes, which are necessary for DNA replication, typically function in groups to split one single original DNA duplex into two identical DNA duplexes. One nucleotide at the a time, DNA polymerase inserts nucleotides to a DNA strand's three primary (3')-end. DNA polymerases are needed to duplicate a cell's DNA each time it divides in order to send a replica of the original DNA molecule to each daughter cell. This is how genetic information is transmitted down through the generations.

These enzymes help the chemical process to happen.

Deoxynucleoside Triphosphate + DNAn ⇌ Pyrophosphate + DNAn+1.

A dual DNA molecule is duplicated to two identical DNA molecules during the dna replication Process, which is carried out by DNA polymerase. With the help of the polymerase chain reaction, generally known as PCR, scientists have been able to duplicate DNA molecules inside test tubes. DNA polymerase alpha (Pol ), DNA polymerase delta (Pol ), & DNA polymerase epsilon (Pol ) are at least 3 DNA polymerases needed in eukaryotic genome replication (1). By creating an RNA/DNA hybrid primer, Pol starts the synthesis of both the leading & lagging strands of DNA.

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Eight distinct pairings both sister chromatids are possible in an organism's gametes if it contains six diploid chromosomes.

Why do gametes matter?

Gamtes are a term used to describe an organism's reproductive cells. the cells is another name for them. gametes are also known as sperm for males and oocytes or egg cells for females. gametes are composed of haploid cells, which contain only one copy of each chromosome per cell.

Are there gametes in humans?

The pair of chromosomes in gametes, which are also known as reproductive cells, is also referred to as haploid. human gametes is haploid cells with 23 chromosomes, one of which is found in each of the chromosome pairs found in diplod cells.

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To enlarge and the chromosomes to disperse from one another. The term "hipotonica solution" refers to this kind of solution.

Long DNA strands are carried by chromosomes, which are found in the nucleus of cells. The substance that contains genes is DNA. The foundation of the human body is it.

The DNA molecule is bundled into chromosomes, which are thread-like objects located in the nucleus of every cell. The proteins known as histone proteins that stabilize that organization of the each chromosome are formed of DNA that is tightly wound lots of times.

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Hydrophobic amino acids are frequently present in the interior of proteins that are found in the watery environs of cells.

Non-polar molecules make up hydrophobic compounds, which resist water bodies while drawing in other neutral molecules including non-polar solvents. Alkanes and other types of lipids are examples of these compounds.

The hydrophobic interactions are caused by these two characteristics of water, namely polarization and its capacity to form potent hydrogen atoms with other polar molecules. Water's polarity allows it to easily form hydrogen bonds with other polar molecules, which allows it to dissolve other polar molecules.

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ATP is a source of energy is that the products of hydrolysis of ATP have less free energy than the reactants because :

Due to the high-energy phosphate bonds in ATP molecules, a significant amount of free energy is released during hydrolysis. The initial hydrolysis of ATP takes place at the gamma phosphate and results in the production of adenosine diphosphate (ADP) and a free phosphate group.

7.3 kcal/mol of energy is released during the hydrolysis of one ATP molecule (G = 7.3 kcal/mol of energy).

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Low transcription if promoter is heavily methylated.

In genomics, transcription is the process of creating an RNA copy of a gene's DNA sequence. This copy, known as messenger RNA (mRNA), transports the protein information encoded in the gene's DNA. A gene cannot be used to make a protein in a cell if it is not transcribed. If a gene is transcribed, it will almost certainly be used to produce a protein (expressed). Generally, the more a gene is transcribed, the more protein is produced.

Gene expression is specifically regulated on two levels. First, transcription is controlled by limiting the amount of mRNA produced by a specific gene. The second level of control comes from post-transcriptional events that regulate mRNA translation into proteins.

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Answer:

see explanation

Explanation:

1. Margaret is wondering why her African violets aren't blooming

2. She discovered that her violets need nutrients, watering, and lots of sunlight

3. She was already following the salesperson's instructions so she decided maybe her soil was low in nutrients. She buys her plants nutrients in specific amounts.

4. After giving one of her plants' nutrients, and giving the other none she found out that the nutrients are exactly what her plants needed

5&6. I can't figure out

7. Buying her plants some fertilizer (i think)

8. Low nutrients in the soil.

9. The African violets needed fertilizer in order to produce flowers.

10. Feed the rest of her plants, and continue taking precise care of the violets.

Sorry if any of these are wrong!

Answer:

a cell

Explanation:

hope it helps

hope it helps

Many species of the enterobacteriaceae share the type iii secretion system, which enables them to inject proteins right into the host cell.

The Enterobacteriaceae antigenic structures, the O, H, and K antigens, and the polysaccharide capsules are additional defined bacterial virulence factors. Less research has been done on the virulence factors important for urinary tract infections in Gram-positive pathogens.

We may categorize E. coli pathotypes into four primary virulence classes: colonization, fitness, toxins, and effectors; each is composed of a number of distinct virulence factors with a clear purpose and activity (Table 1). It's important to highlight that several enteric and extraintestinal pathotypes of E.

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Answer:

It is to be released and meet up with the female egg cell.

Explanation:

Answer: Covalent Bond

Explanation:

When carbon atoms bond with each other, it makes a covalent bond.

The enzyme of this exercise could have increased its activity after their isolation, due to an increase in the substrate this enzyme acts on. For example, after we eat our food at dinner, the concentration of our bodies' insulin increase, due to a higher concentration of glucose from that aliments provenience from the digestion on our stomachs. This also can cause a positive feedback reaction in our bodies, which means that a little amount of enzyme, can produce more of this molecule, and they are those kinds of metabolic processes which usually are involved in maintaining our bodies' homeostasis.

We can see an example of this in the following picture, where the presence of a substrate, activates the enzyme.

The sentence that supports the statement that hormones are involved in the regulation of homeostasis is: The hormone erythropoietin increases the production of red blood cells when oxygen levels are low.​

Homeostasis is the condition of maintaining the adequate conditions inside the living body that are most suitable for its survival. It is the state of steady internal, physical, and chemical conditions. The correct temperature, adequate oxygen concentrations, adequate fluids inside the body are the examples of homeostasis.

Erythropoietin is the hormone produced by the kidney cells that enhances the production of RBCs in the body. This in turn enhances the oxygen concentration inside the body.

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Answer:

30

Explanation:

Its 30 because 30 is divisible by 10 and 6.

30 divide 10 = 3

30 divide 6 = 5

Question 1: 2.

Question 2: 30.

Question 3: 29.

Question 4: 27.

Question 5: neither prime nor composite.

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Answer:

It's false, without chlorophyll a plant can't produce food meaning no photosynthesis.

Answer:

false.

Explanation:

because if a plant doesn't have energy it will die

Musculoskeletal system works to help you with diverse body movement. human body have206 bones and more than 600 muscles, connected by ligaments, tendons and soft tissues.

Bones support your body, protect organs and tissues, store calcium and fat and produce blood cells. Cartilage is connective tissue, cartilage cushions bones inside your joints, spine and in your ribcage. Bones together makes joints these joints have a large range of motion .Muscle is made of thousands of stretchy fibers. they helps to move, sit upright and stand still. Ligaments are tough collagen fibers, ligaments connect bones and help stabilize joints. Tendons connect muscles to bones tendons are tough but not very stretchy.

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Answer:

.

Explanation:

Cells make up tissues, tissues make up organs, and organs make up organ systems.

he going there the atom seeing everything in it until the end form the start

Recycling rubber tires into materials that make track surface affect the use of natural resources by maximizing it.

This is referred to as the process in which waste materials are converted into new materials such as in this scenario in which rubber tires are used to make track surfaces. This process helps to reduce the degree of pollution in the ecosystem thereby making it a safer place to live.

Recycling ensures that materials are used for other purposes and is not wasted which therefore maximizes its use and is therefore how it affects the use of natural resources.

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The law of conservation of matter states that matter can neither be created nor destroyed in a physical or chemical reaction. Similarly, the chemical changes which occur during the formation of a pizza dough follow the same law of conservation of matter.

The law of conservation of matter also suggests that matter can be transformed from one form to another. Likewise, the chemical changes that take place during the preparation of a pizza dough such as rising of dough obeys the law of conservation of matter.

During dough preparation, salt, yeast and warm water are added to the flour and mixed thoroughly. As a result the yeast digests complex sugars and liberates carbon dioxide, which enables the dough to rise.

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Deforestation can lead to runoff of water, it does not imply contamination.

Particulate matter of natural origin would be processed by decomposers, increasing nutrients in the soil and in groundwater (if leaching takes place).

Acid precipitation can change pH and mineral composition in the soil, It does not have a direct impact on groundwater.

Answer: leaking underground storage tank is a way of pollution that definitely have an impact on groundwater.

The ovarian slides taken from the female ape will show crossover chromosomes in (A) meiotic prophase I.

Crossing over is the event that occurs during Prophase of Meiosis I. During this event, the exchange of genetic material occurs between two non-sister chromatids of two homologous chromosomes. This occurs to produce the recombinants having genotype different from both the parents.

Meiotic Prophase I is the longest and most complex phase of Meiosis. The phase is further divided into stages. These are: Leptotene. Zygotene. Pachytene, Diplotene and Diakinesis. Many of the crucial events of Meiosis like synapsis formation, recombination, etc. occur in this phase.

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Organisms can adapt to different environments, however, this usually occurs over generations and at the population level. At the level of the individual, an example is mutations, in which the offspring may have different characteristics from the progeny. However, these adaptations of the offspring will either be detrimental or give an advantage depending on the environment in which it is

Because these changes occur gradually over generations, individual organisms cannot increase their fitness on their own. And although there are special cases in which an organism can adapt to environmental changes through a phenomenon called phenotypic plasticity, this is not common in all species and is not due to a genetic change in the individual. Therefore, the answer would be B (sometimes, it depends on where they are located if the adaptation is helpful or not).

Answer:

He chose peas because they had been used for similar studies, are easy to grow and can be sown each year.

Protease inhibitor interferes with the Cleavage of polypeptide chains to make functional HIV proteins.

Antiviral therapy is used to treat viral infections, Because they are effective against retroviruses like HIV, some of these medications are referred to as antiretrovirals.

Protease inhibitors are medications that prevent the polyprotein from being cleaved into functional proteins. Protease is a protein-based chemical that regularly breaks the polyprotein into useful proteins, so hindering, or repressing, protease forestalls this fundamental stage of viral multiplication.

The body's protease enzyme is necessary for HIV replication. Drugs called protease inhibitors to stop protease enzymes from working. The HIV life cycle is disrupted as a result of this because protease enzymes are prevented from contributing to HIV's ability to multiply. thus cleavage of the polypeptide chain stops and no further functional HIV proteins will be made. This prevents the virus from spreading.

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Nutrients are not a necessary life function as it is not directly necessary to maintain the life of the individual organism. It only helps in the breakdown of food to give them energy.

What are the life functions?

Living organisms are systems made from cells and are capable of life functions such as organization, metabolism, responsiveness, movements, transport, respiration, excretion, digestion, responsiveness, growth, regulation, differentiation, synthesis, and reproduction.

All living organisms have certain characteristics that distinguish from non-living forms. All of these processes are interrelated. From smallest cell to a complete body system do not work independently.

Hence nutrients are not directly a necessary life function.

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Answer:

Hi! The answer is Option D Bohr