What are some changes that can occur in ecosystems?

Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.

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B)Mendelian genes are at specific loci on the chromosome and,in turn, segregate during meiosis.

A sequence is a section of DNA that is required to make a protein. The section of DNA undergoes transcription in order to synthesize a protein. As amino acids are put together, their order determines the way in which they will fold into a three-dimensional structure. It is the shape of the folded structure that determines its function.

Gene is a section of DNA that is required to make a protein. The section of DNA undergoes translation in order to synthesize a protein. As amino acids are put together, their sequence determines the way in which they will fold into a three-dimensional structure.

A gene is a segment of DNA that is required to produce one protein. Because they code for proteins made up of hundreds or thousands of amino acids, genes are typically hundreds or thousands of base pairs long.

Translation is the process by which ribosomes in the cytoplasm or endoplasmic reticulum synthesize proteins in molecular biology and genetics.

The amino acid sequence of a protein drives the folding and intramolecular bonding of the linear amino acid chain, that will determines the protein's unique three-dimensional structure.

The folded structure's conformation determines its function, which is directly dependent on the protein's linear amino acid sequence.

Thus, it can be concluded that, section of DNA referred to as gene is involved in protein synthesis, i.e., translation. In this amino acid sequence will decide the type of fold.

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Answer:

Median height is selected

Explanation:

Stabilizing selection is a particular type of natural selection where the mean of the trait in the population stabilizes on non-extreme phenotypes, thereby favoring intermediate phenotypic variants. At genetic level, stabilizing selection is shaped by selective forces that push the distribution of the trait in the population toward the average (median trait), it is a condition that may happen when a population is completely adapted to its environment. Thus, stabilizing selection acts to purge the extreme phenotypic variants via purifying selection. Stabilizing selection is considered to be one of the most important mechanisms controlling the distribution of different phenotypes after many cycles of artificial selection, it s for that reason that breeders believe that this type of natural selection is the most common in nature.

Answer:

Because blood does not clot properly without enough clotting factor, any cut or injury carries the risk of excessive bleeding. In addition, people with hemophilia may suffer from internal bleeding that can damage joints, organs, and tissues over time.

Explanation:

The correct answer is Step B

Explanation:

The lysogenic and lytic cycles are processes of replication for viruses. These two processes involve different steps. In general, the first stage involves attachment and penetration as the virus enters the host cell. This step is followed by the provirus, which means the genome of the virus is integrated into the DNA of the cell, this step is also mentioned in the model as part of step B "the provirus is formed". Moreover, the formation of the provirus is key as the nutrients of the host cell and genome are used for replication. Thus, in the diagram, the provirus is formed in step B.

Answer:

step b on edge is your answer

Explanation:

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Answer:

The streak colors are different. Limonite streaks show yellow.

Explanation:

The minerals in the rocks they found are not limonite

According to Mary and Jim. The colors of the streaks are different. This is because every piece of rock has different origins and with respect to that, they obtain colors.

Limonite may be defined as iron ore that possesses a brown earth pigment. In ancient times, it was utilized as an ornamental stone for small carved items such as beads and seals. It is also known as brown hematite or brown iron ore.

The limonite generally occurs in the cavity of sedimentary rocks as well as its coating. It also presents as iron rust. This experiment clearly demonstrates the different colors of the streak.

The ores of limonite are yellowish in color and consist of 40 to 60% of iron metal. The colors of other ores are significantly different from the streak of limonite.

Therefore, the colors of the streaks are different. This is because every piece of rock has different origins and with respect to that, they obtain colors.

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Answer:

a. Angiosperm are plants (autotrophs) that use photosynthesis to produce their own food, while vertebrates are animals (heterotrophs) that obtain their food from other organisms. Vertebrates include fish, amphibians, reptiles, mammals and birds.

b. Adaptations in angiosperms include two reproductive structures 1- fruits (ovaries), whose main function is to disperse the seeds and 2- flowers that ensure pollination and protect the embryo sac during its formation.

c . Examples:

1- The mycorrhizal symbiosis between plant roots and symbiotic fungi plays a key role in nutrient uptake from the soil. Arbuscular mycorrhizal is a type of symbiosis where a fungus of the phylum Glomeromycota penetrates the cortical root cells of vascular plants to produce specialized structures named arbuscules.

2- Microflora in the vertebrate digestive tract. The microorganisms that live in the digestive tract of vertebrate species are beneficial for the absorption of nutrients. For example, in humans, Saccharomyces boulardii has shown to have a probiotic effect by increasing intestinal homeostasis, thereby enhancing nutrient uptake.

Answer:

Help maintain a balance in neurotransmitters such as serotonin

Explanation:

Anti-depressant medications help the body maintain a balanced, homeostasis level of neurotransmitters, often serotonin.

Answer:

Hello Again!!

Your answer is C. LIMESTONE!

Explanation:

Limestone is formed Calcium Carbonate (CaCO3) and a mixture of othe organic matters like shells, coral and waste...

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itsMATT04

Limestone is an example of an organic sedimentary rock.

These are organic-rich sedimentary rock which contains significant amount of organic carbon.

Hence, here limestone is the only organic sedimentary rock.

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Answer:

Meiosis is the mechanism used for producing gametes in multicellular organisms whereas it does

unicellular organisms.

Explanation:

Meiosis is a kind of cell division used mainly by sexually-reproducing organisms, whether unicellular or multicellular, to produce gametes i.e. meiosis only occurs during gamete formation.

In sexual reproduction, gametes must fuse in a process called fertilization. This gametes, however, must each possess half of the chromosome number of the individual organism. Meiosis is the process that ensures that the chromosome number of the gametes is reduced by half i.e. diploid (2n) to haploid (n).

Therefore, meiosis is the process of gamete formation in sexually-reproducing unicellular or multicellular organisms.

Answer:

The young blood should understand the value of time. It is very precious and never waste it in bad things. Young blood should do everything to complete their dreams and also serve to their country.

Explanation:

The young generation is the future of any country. There role is much important than others. They are the essential and integral part of the society and we can not imagine a country or a society without a young blood. So it is rightly said that todays generation or young blood will be the future of a country. They are the driving force and make government to make the their decision at prior. Young blood is the future of a society or community can change the country. Thus they should live in hope and to participate in building the future of the country. They should be honest, good and hard worker and should contribute to their country service. Young blood is the backbone of a country that can change the value of a country. Physical education and sports can teach a lot to them.

Answer:

metamorphic rocks form from heat and pressure changing the original or parent rock into a completely new rock.

Answer:

Bacteria are transmitted easily and reproduce quickly

Explanation:

Bacteria are organisms that have a single cell. The process of reproduction of the bacteria is binary fission. The parent cell divides into the daughter cell. The DNA of the parent cell gets copied and gets divided by forming the identical daughter cells. Some bacteria have nutritional values in them while the others are infectious. They can divide at an alarming rate if they receive favorable conditions. Also, they are easily communicable and transmittable. It is because of this reason that the bacteria are good at causing infections in other organisms.

Answer:

Option c

Option b

Explanation:

To calculate range: range is highest data value - lowest data value

where the highest value in student 1's result is 3.64 and the lowest value is 3.17

Thus, the range of student 1's result is

3.64 - 3.17 = 0.47

Scientists conduct experiments to test a hypothesis. For a scientific research, the researcher first form hypotheses on a particular question she wants answered or maybe she is curious about something. An experiment is then carried out to further test the validity of the hypothesis so as to be able to make a conclusion.

Answer:

A

Explanation:

bc

Answer:

The endosymbiotic theory states that some of the organelles in eukaryotic cells were once prokaryotic microbes. Mitochondria and chloroplasts are the same size as prokaryotic cells and divide by binary fission. Mitochondria and chloroplasts have their own DNA which is circular, not linear.

Answer:

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Digram is not given in the question, so, the required diagram is attached below:

Answer:

conjugation

Explanation:

Conjugation is defined as a sexual process in which two organisms of the same species share their nuclear material or DNA with each other and form a new organism.

Binary Fission is defined as the process in which one organism divides into two daughter cells to form a new organism.

Transduction is the process in which a foreign DNA is transferred into a cell with the help of a vector.

Transformation is the process of genetic alteration in which a cell acquires genetic material from its surroundings.

Hence, the diagram is showing the process of "conjugation".

Answer:

the answer is C-conjugation

Explanation:

Answer:

How the eye view an object.

As the object appear before the eye,

Light enter the cornea, the domeshape that cover the front eye.

The light then enter the pupil through the cornea.

The light then hit the eye lens, a transparent structure that focuses the light through the virteous humour, a gel like substance that surrond the retina.

The retina then receive the light that was focused by the eyes lens and transform it to electrical impulses.

The electrical impulses is then transmitted to the person through the optic nerve,

The optic nerve then interpret it as the object view.

Explanation.

Eyes are organs of the visual system. They provide both humans and animals with the ability to receive and process visual information, thereby enabling different photo response functions that are independent of vision. Eyes detect light and convert it to electrical impulses in neurons. The optic nerve then send it to the brain which is then is interpreted as what is seen.

How the eye view an object.

As the object appear before the eye,

Light enter the cornea, the domeshape that cover the front eye.

The light then enter the pupil through the cornea.

The light then hit the eye lens, a transparent structure that focuses the light through the virteous humour, a gel like substance that surrond the retina.

The retina then receive the light that was focused by the eyes lens and transform it to electrical impulses.

The electrical impulses is then transmitted to the person through the optic nerve,

The optic nerve then interpret it as the object view.

Answer:

Moving genetic code from the nucleus to a ribosome  

forming part of the ribosome  

Carrying amino acids to a ribosome  

controlling splicing by marking intron and exon sequences

Explanation:

Ribonucleic acid (RNA) is a key molecule that has diverse biological functions. In the first place, the messenger RNA (mRNA) is an RNA version whose function is to transmit the code from the DNA within the nucleus to the cytoplasm during protein synthesis. Second, the ribosomal ribonucleic acid (rRNA) represents a structural component of ribosomes where proteins are synthesized. Third, the transfer ribonucleic acids (tRNAs) represent another important class of RNA version that attach amino acids to transport them to the ribosomes in order to decode an mRNA into a protein. Finally, RNA splicing is the processing of RNA to eliminate non-coding introns from the precursor mRNA (pre-mRNA) molecule to form the final mature mRNA transcript.

Answer:

human invasions and expansion/contraction cycles during glacial-interglacial periods

Explanation:

In 1961, the biologist Edward Osborne Wilson studied the distributional, behavioral and morphological characteristics of ants living in the Melanesian archipelago. After his study, Wilson then proposed a hypothesis to explain the biogeographic dynamics of Melanesian ants which has been referred to as the 'taxon cycles'. Taxon cycles are defined by stages of expansion and contraction in the range of distribution of species combined with evolutionary adaptive changes in their ecological niches. These cycles can be represented by historical processes of invasion that resemble human invasions. In the last years, it has been shown that Wilson's hypothesis is supported by predictions obtained by modern methodologies for investigating taxon cycles (i.e., evolutionary phylogenetic methods).

Answer:

The correct answers are :

a) syndrome Could be autosomal recessive or dominant

b) If it is autosomal recessive - no ,

and if it is autosomal dominant - yes, (II-4) - Aa

c) probability of the another child :

Autosomal recessive: Aa x aa 50%

Autosomal dominant: aa x Aa 50%

Explanation:

a) Marfan syndrome could be inherited by the autosomal recessive or dominant pattern on the basis of following characters according the pedigree gives:

- transmitted by anyone regardless of sex male or female

- characters should not skip generations

- A cross between affected person and an normal person should produce approximately half of the affected offspring.

b) Assuming that autosomal dominant than there is two possibilities :

1) in case of I 2 genotype is heterozygous which means it is Aa which will produce Aa Aa aa and aa with crossing with aa as per pedigree however it is incorrect according the offspring given in II.

2) If I 2 is AA- then offspring will be Aa, Aa, Aa and Aa. which is correct according the pedigree.

thus, the answer is - Aa

c) the punnet square as per question is :

              II2  -  Aa ×  II1 - aa

      A      a

a    Aa     aa

a    Aa     aa

similar with autosomal recessive

thus, the correct answer is 2 out of 4 that is 50%

Answer:

None of the individual insects should have possessed genomes that made them resistant to DDT.

Explanation:

Pesticides such as DDT have been considered one of the best way to kill insects in the past. But with time, farmers have observed that this is not an authentic method. This is because the insects can gain resistance to the pests if they are exposed to the pesticide again and again. Even they could transmit these resistant genes in their offsprings. Hence, DDT will become useless against insects over time.  

Answer:

Explanation:

This includes a decrease in the rate of maximal expiratory air flow (a decrease in FEV1 and the FEV1/FVC ratio) due to the increased resistance, and a reduction in forced vital capacity (FVC) correlating with the level of hyperinflation of the lungs.

Answer:

The correct answer is -

1. Based on height he is 50% and height he is 25%

2. The nutritional needs are normal due to the constant percentage in both height and weight throughout.

Explanation:

By the reference of the chart of growth rate presented by CDC,

These informations can be found-

Weight :

A= 50%

B=50%

C=50-75%

Height :

D=10-25%

E=25%

F=25%

Then the percentage of height by weight ratio

Height by weight%:

G=75-90%

H=75-90%

I=75-90%

Thus, the correct answer is -

1. Based on height he is 50% and height he is 25%

2. The nutritional needs are normal due to the constant percentage in both height and weight throughout.

Answer:

Any preserved remains, trace, or impression of any once-thriving living thing from the past geological age is known as a fossil. This comprises exoskeletons, bones, stone imprints of animals or microbes, shells, hair, petrified wood, objects preserved in amber, DNA remnants, coal, and oil. The fossil record is the term used for the totality of fossils.  

The scientists use the prevailing fossils to show what the intermediary forms between the organisms may appear like. It is hard for the scientists to locate the fossils of the transitional forms as the formation of the fossils of the transitional forms may have never taken place because of the environmental conditions. In case if they did have formed, then the natural procedures like erosion may have demolished them.  

B. Fast Carbon Cycle moves through life forms on earth

Answer:

the answer above is correct

Answer:

A. Will only phosphorylate glycogen synthase (GS) after GS has been phosphorylated by casein kinase.

Explanation:

Glycogen synthase kinase (GSK) is a type of enzyme capable of phosphorylating serine and threonine residues on the glycogen synthase (GS). The insulin hormone activates the synthesis of glycogen by dephosphorylating GS, but it is a mechanism that depends on the previous phosphorylation of GS by Casein Kinase (CK). GSK is also known to phosphorylate the insulin receptor (IRS), and thus controlling glucose metabolism.

Answer:

When pollen from the pollen part of the flower (the anther) gets its way into the germination part (the stigma) of the SAME plant.

It's kinda weird because many plants have both "male" and "female" seexy bits on the same flower.  

Explanation:

Self-pollination is when pollen from the same plant arrives at the stigma of a flower (in flowering plants) or at the ovule (in gymnosperm-style plants).

There are two types of self-pollination: in autogamy, pollen is transferred to the stigma of the same flower; in geitonogamy, pollen is transferred from the pollen part (anther) of one flower to the germination part (stigma/ovule) of another flower on the same flowering plant.

Answer:

This is the pollination of flower by pollen grains from the same flower on the same plant.

Explanation:            OR:

This is also when pollen from the same plant arrives at the stigma of a flower or at the OVULE.

Many plants that can be self pollinating can also be cross pollinating.

Examples of self pollinating plants are: wheat, tomatoes, barley, e.t.c.

This is also the transfer of pollen from the anther to the stigma of the same flower or the flower of the plant with the same clone.

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Answer:

The answer is a repressive mutation (the term is similar to b option).

Explanation:

In bacteria, the arginine regulon consists of a dozen genes required during the transport and biosynthesis of arginine (arg genes), these genes are controlled as a single unit. In prokaryotes, the concept of regulon is similar to the operon; however, an operon is composed of a group of genes linearly localized on bacterial chromosome, while a regulon can be formed by genes localized in different chromosome regions. Moreover, in eukaryotes, this concept is also used in order to indicate a set of linked genes that are regulated by the same regulatory gene sequence. A repressive mutation in a positive regulator of the arg regulon may trigger the inhibition of arg genes by affecting their ability to bind arginine.

Answer:

they travel directly from the rough endoplasmic reticulum into the trans face of the golgi apparatus