Concept 2 Multiple Choice (2pts each)
1. Which of the following tems represents the smallest part of an element that still has the properties of that element?
A. Cell
B. Matter
C. Atom
D. Molecule

Answer:

C  I think

Explanation:

Reproductive isolation refers to mechanisms that prevent or limit gene flow between different populations or species, ultimately leading to the formation of distinct species. These mechanisms can be categorized as prezygotic or postzygotic barriers.

Prezygotic barriers occur before fertilization and act to prevent mating or successful fertilization between individuals of different populations or species. Examples of prezygotic barriers include temporal isolation (different mating times), ecological isolation (occupying different habitats), behavioral isolation (lack of mating behaviors or signals), mechanical isolation (incompatibility of reproductive organs), and gametic isolation (incompatibility of gametes).

Postzygotic barriers, on the other hand, occur after zygote formation and affect the viability or fertility of the hybrid offspring. These barriers can result in reduced fitness or reproductive failure of hybrid individuals. Examples of postzygotic barriers include reduced hybrid viability (hybrids have low survival rates), reduced hybrid fertility (hybrids are sterile or have reduced fertility), and hybrid breakdown (subsequent generations of hybrids have reduced fitness).

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A mutation that inserts or deletes one or two nucleotides is usually more harmful than a mutation that substitutes one base for another because

it shifts the reading frame for the rest of the code causing many errors.

Mutations are changes that occur in genetic material both at the gene level and at the chromosomal level.

The purpose of mutation is to deal with natural changes that will arise at any time, so that when changes occur, there are two possibilities that can arise, namely the mutated trait is more adaptable than the original trait, so that the original character may disappear from circulation.

Another possibility is that the mutated trait is not suitable for the new environment, so that the individual or population of a species that has it will decrease or become extinct. Based on this, it can be said that whether or not the mutated individual is suitable or not depends on the area where the individual or population lives.

Mutations themselves are divided into Big Mutations and Small Mutations, Small Mutations only cause small changes that are sometimes not obvious in the phenotype or in other words there are variations where the mutated individual is only slightly different from their parents.

Conversely, large mutations cause obvious changes in the phenotype and cause the phenotype of the offspring to be abnormal. Major mutations are the basis for a heritable source of variation in living organisms.

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2.1.2. The numbers and names of the places (regions) where Chlorophyll-containing cells occur are:

2.1.3. The mesophyll is the primary site of photosynthesis in plants. The mesophyll is a layer of cells that lies between the epidermis and the phloem. The mesophyll cells contain chlorophyll, which is the green pigment that captures sunlight and uses it to convert carbon dioxide and water into oxygen and glucose.

2.1.4. The mesophyll cells are structurally adapted for photosynthesis in several ways. First, the mesophyll cells are packed with chloroplasts, which contain chlorophyll. Second, the mesophyll cells have a large surface area, which allows them to absorb more sunlight. Third, the mesophyll cells have a thin layer of cytoplasm, which allows for the rapid diffusion of gases and nutrients.

2.1.5. Phloem

The phloem is a vascular tissue that transports food and nutrients throughout the plant. The phloem is made up of two types of cells: sieve tubes and companion cells. Sieve tubes are long, thin cells that are connected by small pores. Companion cells are smaller cells that are attached to sieve tubes. Companion cells help to provide energy and support for sieve tubes.

2.1.6. The components of the phloem tissue are:

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Answer:

Look below

Explanation:

To get the average of your answer.

Biotic factors include animals, plants, fungi, bacteria, and protists. Some examples of abiotic factors are water, soil, air, sunlight, temperature, and minerals.

Answer:

deer, rabbits, fish, elephant, bird

Explanation:

Answer:

Its simple

Explanation:

Answer: Similarities Both thermometers are used to measure temperature and both of them use mercury. Differences Clinical thermometer is used to measure human body temperature whereas laboratory thermometer is used to measure temperature of other object which has higher temperature than human body temperature.

Answer:

Electrical energy is defined as the energy flowing through a device due to the flow of electrons or charges from one point to another.

The energy present within an object or material due to the sum of its motion and potential energy is known as mechanical energy.

Thermal energy is defined as the energy present within an object because of the motion of its particles.

So, when we plug in and turn on a hair dryer then electrical energy starts to flow. As a result, some of its molecules will gain kinetic energy and some will have potential energy.

Hence, its sum will lead to formation of a mechanical energy. Since, this mechanical energy gets converted into thermal energy due to which hairs get dry.

Thus, we can conclude that the energy transformation that occurs when a hair dryer is plugged in and turned on is that electrical energy transforms into mechanical and thermal energy.

Explanation:

AnswerYou could use the better version of the internet

Explanation:

The formation of the enzyme pepsinogen basically encompasses several steps. Here are the general steps for the formation of pepsinogen: Gene expression, mRNA processing, etc.

Pepsinogen production is governed by a gene that is translated into mRNA in the cell nucleus. Transcription is the name of this technique.

Exons (coding areas) are spliced together and introns (non-coding regions) are deleted during the processing of newly generated mRNA.

Mature mRNA is basically exported from the nucleus to the cytoplasm, where it interacts with ribosomes to begin translation.

When a polypeptide chain is formed, it initiates to fold into the exact three-dimensional form it will eventually take on.

Packaging and secretion of pepsinogen: After being correctly folded and changed, pepsinogen is then packaged into vesicles inside the cell.

The acidic environment in the stomach causes pepsinogen to be activated into its active form, pepsin.

Thus, these are the steps of Pepsinogen formation.

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The molecular mechanisms mentioned, namely DNA methylation, chromatin remodeling, covalent histone modification, and localization of histone variants, are all involved in the regulation of gene expression.

DNA Methylation: DNA methylation is the addition of a methyl group to the DNA molecule, typically at cytosine residues in the context of CpG dinucleotides. DNA methylation plays a crucial role in gene regulation by modulating the accessibility of genes to the transcriptional machinery. Methylation of certain regions of DNA, such as gene promoters, often leads to gene silencing or reduced gene expression.

Chromatin Remodeling: Chromatin remodeling refers to the alteration of the structure and composition of chromatin, which is the complex of DNA and proteins that make up chromosomes. Chromatin can exist in a condensed form, known as heterochromatin, or in a more relaxed form, known as euchromatin. Chromatin remodeling involves changes in the positioning and accessibility of DNA by remodeling complexes, which can either promote or inhibit gene expression.

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Answer:

I think it may be replacement

Answer:

The gradual replacement of one plant community by another through natural processes over time

Answer:

Trisomies and monosomies are two types of chromosomal abnormalities. Specifically, a trisomy is when a person has three of a particular chromosome, instead of the usual two. A monosomy is when they just have one chromosome instead of the usual two.

For example: A trisomy is down syndrome

Explanation:

Answer:

trisomy is when a person has three of the particular chromosome rather than two. Monosomy is when someone has one chromosome rather than the usual two.

The most likely inheritance mechanism for the tan and red phenotypes in the melon plants crossed by J.W. McKay is the tan and red phenotypes exhibit codominance.

Thus, the correct option is A.

Codominance means that both the tan and red phenotypes are expressed equally in the offspring, resulting in a combination of the two colors.

In option B, the tan phenotype would be dominant and would mask the red phenotype, resulting in all tan offspring. In option C, the red phenotype would be dominant and would mask the tan phenotype, resulting in all red offspring. However, the results documented in the table indicate that both tan and red phenotypes are present in the offspring, suggesting that they are codominant.

Your question is incomplete, but most probably your full question can be seen in the Attachment.

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I strongly believe that printed maps are not obsolete and are still necessary now that we have technology, because it is still used in schools and some homes to get acquainted. Also Technologies could be altered but the printed maps remain the same.

A map can be defined as a visual or diagrammatic representation of places and their features using symbols that are decodable by the reader

A map serves as a means to understand ones location as well as a guide to a place or location.

In conclusion, though printed maps are loosing their worth in present day, it is still important that we keep them.

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Answer:

i think they must be able to create good hypothesis based on research.

they must be able to create good hypothesis based on research.

Explanation:

The change in conditions that results in an increase in cAMP receptor protein (CRP)-mediated initiation of transcription is a decrease in glucose and an increase in cAMP. The correct option is B).

cAMP, short for cyclic adenosine monophosphate, is a second messenger that is involved in a variety of physiological processes. It's a molecule that binds to and activates protein kinase A (PKA), which then phosphorylates target proteins, regulating their activity.

Transcription is the process by which DNA is copied into RNA by RNA polymerase in the cell nucleus, resulting in the production of a messenger RNA (mRNA) molecule. This mRNA molecule is subsequently used to guide the synthesis of a protein during translation, in which the mRNA is read and translated into the appropriate amino acid sequence.

The cyclic AMP receptor protein (CRP), also known as the catabolite activator protein (CAP), is a transcription factor that binds to DNA to stimulate the transcription of downstream genes. It binds to a specific DNA sequence upstream of the transcription start site known as the CRP site. When bound to cAMP, CRP activates the transcription of target genes. When glucose is scarce and cAMP levels are high, CRP is activated, leading to increased transcription of target genes.

Therefore the correct answer is option B.

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Answer:

An insertion, as related to genomics, is a type of mutation that involves the addition of one or more nucleotides into a segment of DNA. An insertion can involve the addition of any number of nucleotides, from a single nucleotide to an entire piece of a chromosome.

Hope this helps :)

Pls brainliest...

Answer:

B or C

Explanation:

I read about this awhile ago just forgot if it was ethier conduction or convection

The thermal heat energy transfers through various modes. Thermoses work because they minimize conduction and radiation transfer of heat. Thus, option B is correct.

Heat transfer has been the process that moves the heat from higher temperature towards the area of lower temperature. Conduction, convection, and radiations are the three modes of heat energy transfer.

In conduction, the heat flows from one body to another when they are in contact, and in radiation the heat flows in the waveform that does not need any direct contact. It needs an indirect medium to transfer the heat from high to lower temperatures. Thermoses do not show convection as it keeps the temperature constant.

Therefore, option B. thermoses use conduction and radiation.

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The difference in height between the two bottles is 30 millimeters.

To calculate the difference in height between the two bottles in millimeters, we need to convert the heights from centimeters to millimeters and then subtract one from the other.

First, we convert the height of the first bottle from centimeters to millimeters. Since there are 10 millimeters in a centimeter, we can multiply the height of 12 centimeters by 10 to get the height in millimeters:

12 centimeters * 10 millimeters/centimeter = 120 millimeters.

Next, we convert the height of the second bottle from centimeters to millimeters using the same conversion factor. We multiply the height of 15 centimeters by 10:

15 centimeters * 10 millimeters/centimeter = 150 millimeters.

Now that we have both heights in millimeters, we can calculate the difference. We subtract the height of the first bottle from the height of the second bottle:

150 millimeters - 120 millimeters = 30 millimeters.

Therefore, the difference in height between the two bottles is 30 millimeters.

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Answer:

true

Explanation:

because there is existence of fittest

Physiological events such as sensory perception, neural processing, and motor response occur between presentation and the pressing of the hand switch.

When a stimulus is presented, sensory receptors in the body detect the stimulus and convert it into electrical signals. These signals are then transmitted to the brain through sensory pathways. In the brain, the signals are processed and interpreted, allowing for the perception and recognition of the stimulus. Once the stimulus is recognized, motor commands are generated in the brain and transmitted through motor pathways to the muscles responsible for hand movement. These commands initiate muscle contractions, leading to the pressing of the hand switch.

Overall, this sequence of physiological events involves sensory input, neural processing, and motor output, enabling the individual to perceive the stimulus and respond accordingly.

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Answer: The cell membrane

Explanation:

also known as the plasma membrane, plays an important role in homeostasis via the regulation of the passage of materials into and out of the cell. The cell membrane is made of a phospholipid bilayer

Because the items comprising is descended from a progeria patient and also has DNA damage from of the mutation, it has more malformed nuclei than the both father and mother did.

The word "nucleus" (plural: "nuclei") in Latin refers to a fruit seed. Nucleus of an atom, a incredibly dense center portion of an atom, is the most frequent reference. A eukaryotic cell's cell nucleus is its core organelle and houses the majority of a cell's DNA.

Accessible software called Nuclei offers quick and adaptable security checks based on straightforward YAML and DSL. In order to just provide speedy and extensive vulnerability assessment, Nuclei accepted or rejected across targets using template that may scan protocols like TCP, SSH, DNS, HTTP, SSL, and many others.

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Answer:

yes now mcq partner sso explain is nit nessesary

The statement 'cell death normally does not occur unless there has been an injury to the cell' is false.

A cell can be described as the basic building block of life. All living organisms are known to be made of cells.

There are various reasons that a cell might die. A cell might die when its function is over. A cell might also die for the formation of other structures in the body. For example, the formation of an outer layer of the skin requires dead cells. A cell might kill itself if it has no use or finds that it has been invaded by an antigen.

Hence, the statement that cell death occurs only due to injury is false as cell death can occur due to various other reasons.

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Answer: DNA has a double helix while RNA shouldnt

Answer:

A.

toward, mountain ranges

Explanation: