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Cell differentiation is the process by which a cell becomes determined and is specialized in its function. Morphogenesis, on the other hand, is the progressive taking of the shape of an organism  in its development. Morphogenesis, cell differentiation, and cell growth are the three fundamentals of developmental biology.  

Answer:

B

Explanation:

Oil from gas and cars does not contribute much to run off pollution. It mostly pollutes the air as it is used.

Answer:

its B i got it right with my usatestprep i got 100%

Explanation:

C- Deep-sea sediment cores

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D.

Lac operan starts at an off position until a substance like allolactos turns in on so the rna polymerase can go through

Final answer:

The maximal expression of the lac operon occurs when lactose is high and glucose is low, as this allows for increased cAMP which enhances transcription and the presence of lactose inhibits the repressor.

Explanation:

The greatest expression of the lac operon occurs when lactose levels are high and glucose levels are low. This is because a low glucose concentration results in a high level of cyclic AMP (cAMP), which, when bound to the catabolite activator protein (CAP), enhances the binding of RNA polymerase to the lac operon promoter, thus increasing transcription. Furthermore, the presence of lactose results in the production of allolactose, which acts as an inducer by binding to the lac repressor and disabling its ability to bind to the operator site, thereby preventing it from blocking transcription of the operon. Jointly, these conditions significantly derepress the lac operon, leading to its maximal expression.

Answer:

Explanation:

As the water waves go through the gap they spread out, this is called diffraction.

The longer the wavelength of the wave the larger the amount of diffraction.

The greatest diffraction happens when the gap size is about the same size as the wavelength.

Answer:

saturated fat

Explanation:

it is less vnlnerable to rancidity

I believe it’s a or c

                            r                r

R                       Rr                Rr

r                       rr                  rr

Genotype of the mother with freckle trait is rr. This means that it is a recessive  trait.

Genotype of of the father having clear facial skin is Rr, showing that it is a dominant trait. There can be two genotypes for this trait that is Rr and RR.

When these parents are crossed, they produce 50% offsprings with the freckles trait (rr) and 50% with clear facial skin ( Rr).

Therefore, the likelihood of the first child with freckles is A

Hope this helped , Danielle xo

Answer:

They are all true besides "Organisms of the same species are equipped with the same survival skills."-that one is false.

Explanation:

ANSWER ON ED

The answer is skull

Answer:

Skeleton is the answer

Explanation:

Vertebrates have a skeleton made of bone and cartilage inside the body. Some invertebrates have an internal skeleton, but it is not made of bone.

The first capillary bed will A. Filter out the blood

The first capillary bed associated with the nephron, the glomerulus, filters the blood. This filtrate then proceeds through the nephron where solutes are reabsorbed and wastes are secreted. Finally, urine is formed for disposal, completing the nephron's process of filtering the blood and maintaining homeostasis.

The first capillary bed associated with the nephron, also known as the glomerulus, is primarily responsible for filtration of the blood. It forms a tuft of high-pressure capillaries where small solutes are filtered from the blood based on particle size. The filtrate, which consists of everything but the proteins, then continues to the rest of the nephron for further processing.

In the next steps, the filtrate proceeds to the renal tubules where most of the solutes are reabsorbed in the proximal convoluted tubule through a process called tubular reabsorption. This effectively recovers most of the solutes and water, returning them to the circulation. Furthermore, additional solutes and wastes are secreted into the kidney tubules during tubular secretion, which is essentially the opposite process of tubular reabsorption.

Lastly, the nephrons form urine for disposal, effectively cleansing the blood and balancing the constituents of the circulation. They accomplish this through their three main functions: filtration, reabsorption, and secretion. Overall, their principal task is to balance the plasma to homeostatic set points and excrete potential toxins in the urine.

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Answer:

True

Explanation:

point D is carrying capacity.

b) point D is carrying capacity. the fill carrying capacity like is at the same height as point d therefore that is correct.

Answer:

Osmosis

Explanation:

The movement of water (passive) balances the osmotic pressure within or across the tubule walls, which maintains extracellular body fluid volume.

Final answer:

Agricultural chemists are responsible for ensuring the safety of agrochemicals like herbicides, fungicides, and insecticides applied to crops every year. They study the chemicals' effects on human health, animals, and ecosystems to mitigate potential harms.

Explanation:

Agricultural chemists are the professionals involved in making sure that agrochemicals, such as herbicides, fungicides, and insecticides, are safe for humans, other animals, and the environment. These specialists work to develop, analyze and understand the effects of these chemicals on crops and ecosystems. They study the chemical composition of these substances, their mechanisms of action, and their environmental fate. Their expertise helps in the creation of safer chemical agents and in setting regulations for their use. For instance, understanding pesticide resistance and the development of herbicide resistant 'superweeds' is essential in managing and preventing potential adverse impacts.

C. Positive Feedback

This is because a response to a stimulus( low blood pressure) acts in the same direction as the stimulus ( even lower blood pressure).

This is opposed to negative feedback where the response would go in the operate direction of the stimulus ( I.e. blood pressure increasing in response to low blood pressure)

Answer:

Internal fertilization only occurs in terrestrial animals.

Explanation:

This can happen in fish which are not terrestrial animals.

The false statement is that internal fertilization only occurs in terrestrial animals. Internal fertilization is also seen in some aquatic species. Both internal and external fertilization have their unique advantages and are used by different species accordingly.

The statement claiming that internal fertilization occurs only in terrestrial animals is false. As per the given information, internal fertilization not only occurs in terrestrial animals but some aquatic animals also utilize this reproductive method. This process may take place either through direct mating or by the male depositing sperm in the environment in a protective structure that a female then picks up and integrates into her reproductive tract.

There are examples of internal fertilization in several types of aquatic species, such as some bony fish and cartilaginous fish. Furthermore, internal fertilization enables the protection of the fertilized egg from dehydration on land, and a better survival rate compared to external fertilization due to the isolation within the female's body limiting predation on young.

While it is true that external fertilization often involves the production of copious amounts of gametes to increase the chances of successful fertilization, both types of fertilization have their unique benefits and are utilized by different species based on their respective living conditions and survival strategies.

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Answer:

b.human activity

Explanation:

Deforestation is a human-driven process of the tree removal. Destruction of forest is  performed fro many reasons: urbanization of the land, industry, farms, wood and paper production etc. It increased over the past 50 years and the main target are tropical rainforests. The trees are burned or cut by humans who leave the destroyed ecosystem behind.

Deforestation affect the animals and plants that lived there, but also humans and the effect even have global consequence (global water cycles, warming).

The most responsible factor for the changes observed in the world's rainforests, particularly the decrease in acreage, is human activity, specifically deforestation. Deforestation, driven by agriculture and logging, has resulted in habitat destruction, loss of biodiversity, and increased carbon dioxide emissions. Conservation efforts and international agreements are being implemented to address this issue.

The factor that is most responsible for the changes observed in the world's rainforests is human activity, particularly deforestation. Deforestation refers to the clearing of forests, often for agriculture, logging, or urbanization purposes. In the case of tropical rainforests, human activities such as logging and slash-and-burn agriculture have contributed significantly to the loss of acreage.

For example, in the Amazon rainforest, one of the largest tropical rainforests, deforestation has been driven by the expansion of cattle ranching and soybean farming. Trees are cut down to make space for grazing pastures or to plant soybeans. This widespread deforestation has resulted in habitat destruction, loss of biodiversity, and increased carbon dioxide emissions, contributing to climate change.

To mitigate and address the issue of deforestation, conservation efforts, sustainable land management practices, and international agreements such as the REDD+ program have been implemented to promote the preservation of tropical rainforests.

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Feedback loops are used in any system when a stimulus causes the system to move out of balance. Therefore, option (C) is correct.

In order to keep the system in a stable and balanced state, a feedback loop is used to monitor and modify the system's response to a changing environment.

Feedback loops are triggered to return a system to a balanced state when an external input disturbs it. For instance, in the case of a thermostat that regulates the temperature of a room, the thermostat will engage a feedback loop to turn on the heater and increase the temperature back to the correct level if it falls below the desired level. The thermostat will start another feedback loop when the target temperature has been attained in order to turn off the heater and keep the temperature constant.

Not only to improve or increase anything, but also for a number of other purposes, feedback loops can be used. The reaction of the system, for instance, in a negative feedback loop is intended to lessen or reverse the initial stimulus and maintain a stable state, as opposed to enhancing or amplifying it. As a result, choice C is the right response.

Learn more about feedback loop, here:

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Answer:

C. 20, one for each amino acid

Explanation:

Aminoacyl-tRNA synthetase is an enzyme involved in protein synthesis (translation) with the role to attach suitable amino acid on its tRNA (amino acid that correspond to the anticodon on tRNA). As a result of its action, aminoacyl-tRNA is formed. There are the 20 different types of aminoacyl-tRNA synthethases that  make 20 different aminoacyl-tRNA one for each amino acid of the genetic code.

Answer:

Because each strand acts as a template for the synthesis of a new, complementary strand.

Explanation:

This is known as semiconservative DNA replication. Leading and lagging strands are complementary, antiparallel strands (one is 3'-5' while other is 5'-3- direction) which are replicated differently. The leading strand is replicated  continuously while the lagging strand is replicated in fragments-Okazaki fragments. Replication of both strands is performed by DNA polymerase.

Answer:

wrong subject but okay. The answer is (C). why?

Explanation:

Because the moon IS personified as an old man, the moon has been around for millions of years, therefore making the moon old, get it? Also post this on english or writing, not biology.

Hope you have a good day! Byeee <3333

Answer:

Its C I just did it that girl is wrong Im right.... I AM!

Explanation:

The sea is personified as a female.:333333

Answer:

E - F - A - C - B - D

Explanation:

After the export of mRNA from the nucleus, translation (protein synthesis) begins in the cytosol. Proteins that should be secreted from the cell, must e targeted to the endoplasmic reticulum (ER) and this process occurs co-translational (while translation is still in progress).The signal recognition particle (SRP) is involved in the process of targeting, because it recognizes specific signal sequences in proteins and targets that protein to the endoplasmic reticulum (SRP binds to its receptor in the membrane of the ER).

Answer:

B). Genes are expressed differently in liver cells and hair follicles

Explanation:

In given organisms all the cells of the body have the same number of genes, however, their activity varies due to differential expression of genes.

The differential expression of genes is regulated by several factors, such as histone modifications, DNA, etc. which may silence or activate the genes differentially in different cells.

Since the hair cells and liver cells of the organisms will have the same genes, they only vary due to the differential expression fo the genes.

Answer:

B) Genes are expressed differently in liver cells and hair follicles

Explanation:

Cell differentiation helps produce different cells with different functions that express different genes in the genome.

Liver cells and hair follicles are an example of cell differentiation creating different functions in multi-celled organisms.

Answer:

3 dimensional arrangement of  the atoms within a single polypeptide chain.

Explanation:

The tertiary structure of a polypeptide is its unique three-dimensional shape formed by chemical interactions, especially among R groups. This structure determines the protein's functionality, with hydrophobic and hydrophilic interactions playing key roles along with covalent bonds like disulfide bridges.

The tertiary structure of a polypeptide is the three-dimensional arrangement of atoms within a single protein chain. This unique conformation results from a variety of chemical interactions, chiefly between the side chains, also known as R groups, and backbone groups of the amino acids that make up the polypeptide. A multitude of interactions including hydrophobic interactions, hydrogen bonds, ionic bonds, and disulfide bridges, among others, stabilize the tertiary structure and ensure the protein can perform its biological functions properly.

Tertiary structure is critical because it largely determines the protein's functionality. For instance, nonpolar, hydrophobic R groups often end up in the interior of the protein, away from water, whereas polar, hydrophilic R groups appear on the surface, interacting with the aqueous environment. Furthermore, the formation of covalent bonds such as disulfide linkages can provide additional stability to the tertiary structure.

The folding process is intricate and sometimes facilitated by other proteins called chaperones, which help guide the protein to its correct shape, ensuring its stability and functional activity. Therefore, the tertiary structure is not simply a result of the amino acid sequence (primary structure) but also of the complex and specific folding patterns driven by these interactions (secondary structure), which eventually form the robust three-dimensional shape.

Answer:

It is used in the step of transformation, in order to make more plasmid DNA and consequently more gene product of interest

Explanation:

DNA cloning, as a method in molecular biology, is used for the multiplication of gene (or other piece of DNA). It usually includes steps of DNA insertion into plasmid (prokaryotic circular piece of DNA). That plasmid is than introduced into bacteria via process called transformation. Transformed bacteria can produce large amount of a product of a certain gene, because of their fast gene expression.

Down Syndrome is caused by the union of a normal gamete with a gamete that has an extra chromosome 21, a condition resulting from chromosomal nondisjunction during meiosis.

The cause of Down Syndrome, which is characterized by the presence of an additional chromosome 21 in every somatic cell (also known as trisomy 21), is through the union of a normal gamete with the haploid amount of chromosomes (n) and another gamete with an extra #21 (n + 1). This occurs due to a process called chromosomal nondisjunction during meiosis, which is the most common cause of this syndrome. Trisomy 21 leads to a variety of physical and developmental features, and the risk increases with maternal age, particularly in women over 36 years old.

Crust, upper mantle, mantle, outer core, inner core

Answer:

1.) Crust

2.) Upper Mantle

3.) Mantle

4.) Outer Core

5.) Inner Core

Explanation:

The answer is chemoautotroph

Answer:

Prophage

Explanation:

Prophage is a viral genome (e.g. bacterihage genome) which is inserted into host genome (e.g. bacterial genome). Such integrated genome-prophage is in its latent phase, because there is no lysis or disruption of host cell. After the latent period, prophage induction occurs in which viral replication begins.