Questions on The excretory system

the half-life of a pesticide determines its persistence in the environment. a common pesticide degrades in a first-order process with a half-life of 4 days. 0.176  fraction (in decimal notation) of the pesticide remains in the environment after 10 days, enter to 4 decimal places.\

No of half lifes (n)  = total time / half life

n= 10/4 = 2.5

Amount of pesticide remains = Ao(1/2)n

Ao is the initial amount

Amount left = Ao(1/2)2.5= Ao(00176)= 0.176 Ao

If we assume Ao=1

Then Amount left = 0.176

A chemical substance's ability to exert negative effects and travel to distant areas can be enhanced by its environmental persistence, which is a crucial feature. The pace of biological and chemical processes, such as photolysis, atmospheric oxidation, hydrolysis, and biodegradation, that remove organic substances from the environment determines how long they remain in the environment.

learn more about persistence in the environment here :

https://brainly.com/question/23125189

#SPJ4

Answer:

Most commonly, color blindness is inherited as a recessive trait on the X chromosome. This is known in genetics as X-linked recessive inheritance. As a result, the condition tends to affect males more often than females (8% male, 0.5% female).

Explanation:

Please give a thanks or 5 stars if this helped!

Calmodulin binds Calcium ions in smooth muscle cells, resulting in contraction of the tissue.

All eukaryotic cells have the calcium-binding protein calmodulin, also known as calcium-modulated protein, in their cytoplasm. It interacts with a large number of other proteins in the cell and performs a wide range of biological tasks as a regulator or effector molecule.

To control activities including muscle contraction, neuron communication, and fertilization, calcium ions quickly send signals. Our body contains more calcium than any other mineral, with phosphorous coming in second. A little amount of calcium, in the form of calcium ions, is also used by our body for more active processes.

Hence, Calcium ions is the correct answer.

To know more about Calmodulin visit:

https://brainly.com/question/9115523

#SPJ4

Respiration, excretion , regulation , respiration, homeostasis, growth are maintained by Nervous system.

The brain, spinal cord, and an intricate web of nerves make up the nervous system. The brain and the body communicate with one another through this system. All bodily processes are under the control of the brain. The spinal cord exits the brain through the back and descends.

To learn more about Neurological system refer

https://brainly.com/question/13193407

#SPJ13

Answer: A. Nucleotide

Explanation: The type of monomer that includes atoms of carbon, hydrogen, oxygen, nitrogen, and phosphorus is a nucleotide.  A nucleotide is an organic molecule that is composed of a nitrogenous base, a five-carbon sugar (ribose or deoxyribose), and at least one phosphate group. They are the monomers that are used to build nucleic acids such as DNA and RNA. Nucleotides are essential components of the genetic material and are responsible for the storage, transmission, and expression of genetic information.

Learn more about nucleotide here: https://brainly.com/question/28178584.

The role does water play in keeping temperatures in Florida from fluctuating dramatically is that water has a high heat capacity that helps regulate the temperature of the surrounding area.

It has been scientifically proven that the specific heat of water is higher than any other substance. This means that if the water is present in any environment, it will have the capacity to absorb more heat as compared to the area where no water is present. Further, water absorb heat during hot climate and then releases back during cold climate.

This is the reason that, in Florida, where water is present, fluctuation in the temperature are only 5 degrees Celsius. On the other hand, in the desert, no water is present and thus fluctuations in temperature are high and can be directly linked to the presence and absence of sunlight during day and night along with other environmental parameters.

Therefore, The role does water play in keeping temperatures in Florida from fluctuating dramatically is that water has a high heat capacity that helps regulate the temperature of the surrounding area.

Learn more about specific heat on:

https://brainly.com/question/11297584

#SPJ1

A.

Explanation:

the organ level of organization is when two or more tissues work together for a specific function

Answer:

Prokaryotic cells can reproduce asexually only through binary fission. Binary fission is the process by which a bacterial cell splits into two identical daughter cells. This is a very fast process and contributes to the rapid growth and replication of bacteria.

Explanation:

Answer:

I agree with the person above this question ^^^^

In every true experiment, a researcher modifies an independent variable in order to affect one or more dependent variables.

In an experiment, the effects of changing the independent variable are tracked. Dependent variables are those observed effects. They are frequently the anticipated result of changing the independent variable. The independent variable determines how the dependent variable changes, thus the name. When performing experiments, researchers aim to quantify the link between the dependent and independent variables.

The cause is the independent variable. Its value is unaffected by other study variables.

Effect is the dependent variable. Changes in the independent variable affect its value.

To know more about independent variable visit:

https://brainly.com/question/1479694

#SPJ4

Marine ecosystems provide important ecological services such as;

Marine ecosystems refer to the ecosystems that are found in water bodies that contain minerals dissolved in high concentrations.

These water bodies are known as seawater and they include oceans and seas.

Ecological services from an ecosystem are those services or benefits that are derived from a particular ecosystem.

The marine habitat contains the largest number of living organisms such as fishes, crabs, and other marine mammals.

The marine ecosystem also contains the largest volume of water as well as deposits of minerals like calcium.

The marine ecosystem is also the largest reservoir of carbon (iv) oxide, CO₂.

Learn more about marine ecosystems at: https://brainly.com/question/1788473

#SPJ1

Answer:

plasmids

b/c it can't have those 4 things

Model B shows lac operon model which correctly shows RNA polymerase, lactose, and repressor protein when the structural genes are being transcribed.

For the transport and metabolism of lactose in E. coli and other bacteria, the lac operon is an operon, or a collection of genes, with a single promoter.

The Lac Operon model may be used to describe how prokaryotic genes are regulated. Here, it is possible to see how changes in physiology and the environment affect prokaryotes' ability to express certain genes. Monod and Jacob were present and saw it.

The regulatory gene generates repressor protein that binds to the operator when inductor lactose is absent. We can thus rule out all the other models in the possibilities based on this. The picture that is attached shows the illustration.

Here is another question with an answer similar to this about lac operon model: https://brainly.com/question/28197003
#SPJ4

Question correction is attached below:

Glucose cannot be synthesized from fatty acids.

Glucose can not be made using fatty acids or ketogenic amino acids. As acetyl-CoA cannot be transformed back to pyruvate due to the one-way nature of the transition reaction, it cannot be used as a fuel.

Since pyruvate and other molecules with at least three carbon atoms are required for the body's enzymes to function in an energetically advantageous manner, acetyl CoA cannot be converted to glucose since it possesses a two-carbon acetyl group. This indicates that the Krebs cycle will continue to break down acetyl-CoA.

Fatty acids cannot be turned into glucose because they produce acetyl coenzyme A (CoA), which enters the citric acid cycle and is oxidized to carbon dioxide (CO₂).

To learn more about glucose visit the link:

https://brainly.com/question/2396657?referrer=searchResults

#SPJ4

Option A, B, E,F;  sinoatrial node,ventricular systole,purkinje fibers and atrioventricular node all indicate an issue with electrical and/or mechanical events.

Specialized pacemaker cells in the heart initiate the electrical depolarization and repolarization sequence. The term "inherent rhythmicity" or "automatity" refers to this characteristic of heart tissue. The atrioventricular node (AV node), the bundle of His, the right and left bundle branches, and Purkinje fibers are some of the conducting channels through which the electrical signal, which is produced by the sinoatrial node (SA node), spreads to the ventricular muscle.

The contractile cells constrict when the electrical signal of a depolarization reaches them. The cardiac cells relax when the repolarization signal reaches them. Thus, the mechanical heart beating is a result of electrical signals. The SA node starts each electrical and mechanical cycle as the heart's natural pacemaker. The electrical impulse that travels through the atrial muscle as the SA node depolarizes causes the muscle to contract.

Atrial contraction follows the depolarization of the SA node as a result. The internodal fibers also allow the SA node impulse to reach the atrioventricular node (AV node). (Because of the nonconducting tissue dividing the atria and ventricles, the wave of depolarization does not immediately extend to the ventricles.) When the atria contract, the electrical signal is delayed in the AV node for around 0.20 seconds before being transmitted to the ventricles by the Purkinje fibers, right and left bundle branches, and bundle of His.

The electrical impulse is transmitted directly to the ventricular muscle by the Purkinje fibers, which causes the ventricles to contract (ventricular systole). Additionally, the atria and ventricles undergo repolarization of the SA node, kicking off the relaxation phase (ventricular diastole).

To learn more about ECG. Click, https://brainly.com/question/26076971

#SPJ4

An engineer need to consider a heat pump system for a home in a cooler or warmer climates. Also, wind tends to move over the water because air over the water is cooler than air over the land is. Therefore, option A is correct.

Heat pumps offer an energy-efficient alternative to furnaces and air conditioners for all climates. They keep your house warmer in cooler climates and cooler in warmer climates. Therefore, an engineer must consider hest pump systems while designing a house.

The unequal heating of the Earth by the sun results in wind, which is the movement of air. The land is warmed by the sun more rapidly than the sea. An inland breeze is produced when warm air above the land rises and cooler air above the water moves in over the land.

To know more about wind, refer to the following link:

https://brainly.com/question/25272341

#SPJ1

Resource partitioning of the seeds reduces competition, and the five different species can live in the same tree. Thus option C is correct.

Migrating birds are defined as the regular seasonal movement of birds between breeding and wintering grounds, often north and south along a flyway.

The various species of warblers, which are seed-eating birds, live in coniferous trees and are all migratory birds. They both feed on tree seeds and live in similar environments. They are all non-residents due to their distinct migration patterns.

According to the passage, the seeds' resource partitioning reduced competition, and the five diverse species can coexist in the same environment.

Thus, Resource partitioning of the seeds reduces competition, and the five different species can live in the same tree. Thus option C is correct.

To learn more about migrating birds, refer to the link below:

https://brainly.com/question/23581258

#SPJ1

Your question is incomplete, but probably your complete question was

Five different species of warblers, seed-eating birds, live in the same species of conifer trees. All of the birds migrate to coniferous forests during the summer, and different species reside in different areas in the same tree. They feed on the seeds of the conifer trees, but the different species do not mate with each other. Which of the following best explains why the different warbler species can all have habitats in the same conifer trees?

a. Not all the warblers are residents in the forest at the same time of the year because of different migration patterns.

b. Physiological differences in beak structure allow the warblers to consume different species of seeds through symbiotic relationships.

c. Resource partitioning of the seeds reduces competition, and the five different species can live in the same tree.

d. Niche overlap occurs between the five different species, and living in the same tree increases competition for seeds.

Answer:

Nucleic acids contain the same elements as proteins: carbon, hydrogen, oxygen, nitrogen; plus phosphorous (C, H, O, N, and P). Nucleic acids are very large macromolecules composed of repetitive units of the same building blocks, nucleotides, similar to a pearl necklace made of many pearls.

consequences  of the overuse or misuse of antibiotics.

To know more about  Antibiotic visit : https://brainly.com/question/17988226

#SPJ1

The following traits represent color blindness as an X-linked trait. Option D.

Most people who are colorblind cannot distinguish between certain shades of red and green. Very rarely colorblind people cannot distinguish between shades of blue and yellow. Certain eye diseases and some medications can also cause color blindness. Color blindness is caused by a lack of color-sensing pigments in the cones of the retina, the neural layer at the back of the eye.

People who are colorblind have difficulty seeing red green blue, or mixtures of these colors. The different types of abnormal conditions include protanomalies, which are insensitive to red light deutenomalies which are insensitive to green light the most common form of colorblindness, and tritanopia which is insensitive to blue light. Marie very rare is there.

Learn more about Color blindness here:-https://brainly.com/question/1601607

#SPJ1

Option 4 is correct - your kidney controls the water level through nephron tubes whenever you have low amounts of water that have been detected in your blood.

Because of drinking less water in a day, we experienced faintness and weak which led to the condition of dehydration. In this situation, saving a single drop of water becomes crucial for our body to survive.

Therefore, Option 4 is correct.

To know more about the working of kidneys, follow the below link:

https://brainly.com/question/28343718

Arguments are human artefacts; they are examples of human invention. Contrary to appearances, arguments are artefacts in the same sense that a computer is. Humans produce arguments for specific goals, just like all other things. Additionally, arguments have sciences devoted to comprehending their operation and enhancing their production, similar to many other objects. The formal logic, probability theory, and statistics of arguments are analogous to those of computer science for computers. In other words, one should approach arguments in the same way that they would any other tool or artefact.

What is scientific argument?

People are considered to be involved in a scientific argument when they disagree on scientific explanations (claims) and back up their positions with concrete evidence. Researchers employ a strategy to guide their work called a scientific argument. Scientists criticise the shortcomings and limitations of other people's arguments in order to ultimately enhance scientific explanations and experimental methods. This method is known as "arguments supported by evidence."

To learn more about Scientific argument from the given link

https://brainly.com/question/10100721

#SPJ9

Answer:

In the presence of an enzyme, the course of the reaction is shown by the red curve.

There is increase in the population of giraffes as the number of giraffes born is more than the number of giraffes died. If all other factors remain constant then the only component that affect here will be : births and deaths.

Population density and growth are influenced by a variety of causes, and these factors may cause fluctuations in population size throughout time.

The birth rate (b) and mortality rate are the two primary variables influencing population increase (d). Animals experience starvation and sickness when population density exceeds the carrying capacity of their habitat.

Anything that limits the size of a population and slows or prevents its growth is referred to as a limiting factor. Biological factors including food, mates, and competition with other species for resources are some examples of limiting constraints.

To know more about population change refer to the given link:

https://brainly.com/question/27991860?referrer=searchResults

#SPJ1

DNA from the first generation has strands that are 15N/14N,One form of DNA in the second generation contains 15N/14N strands, whereas the other type has 14N/14N strands.

Explanation:

One strand of the parental type and another newly generated strand that is formed during DNA replication are both present in the newly formed dsDNA after replication. Semi-conservative DNA replication uses two strands, one of which is paternal and the other fresh.

E. coli was cultured on 14N media and already has DNA that has been tagged with 15N and 15N.Accordingly, during DNA replication, the first generation contains hybrid 15N/14N DNA, wherein one strand (15N) is inherited from the parents and the other (14N) is freshly generated, and the second generation has both hybrid 15N/14N DNA and 14N/14N DNA. It was not possible to find any DNA with 15N/15N strands.

To know more about DNA and Generations Visit here :

https://brainly.com/question/15568680

#SPJ4

During pcr, the energy comes from the incoming nucleotides, that adds the nucleotide to the growing dna strand.

What are nucleotides?

An biological molecule known as a nucleotide has the fundamental building blocks of a nitrogenous base, pentose sugar, and phosphate.

As polynucleotides, DNA and RNA are composed of a chain of monomers with various nitrogenous bases. The execution of metabolic and physiological processes requires nucleotides.

Adenosine triphosphate, or ATP, serves as the energy standard for cells. Numerous metabolic activities require nucleotides, which combine to generate a variety of coenzymes and cofactors such coenzyme A, NAD, NADP, and others.

Therefore, the energy that adds the nucleotide to the growing Dna strand comes from the incoming nucleotides.

To learn more about nucleotides,:
https://brainly.com/question/1569358

#SPJ4

The other three children are having dominant phenotype but only one among them is homozygous dominant. The chances of the child becoming AA is 0.25 and that of Aa is 0.50.

The phrases homozygous and heterozygous are used to characterize allele pairings. Homozygous people have two copies of the same allele (RR or rr). Individual organisms with several alleles (Rr) are referred to as heterozygous. Those who have the genotypes AA and aa are homozygotes (i.e., they have two copies of the same allele). Genotype Aa individuals are heterozygotes (i.e., they have two different alleles at the A locus).An organism is considered to be homozygous dominant if it carries the same dominant allele in two copies, and homozygous recessive if it carries the same recessive gene in two copies. If a gene has two different alleles, an organism is said to be heterozygous. Homo- means the same, but hetero- denotes difference. A specific zygote type is referred described as being -zygous.

Learn more about homozygous here:

https://brainly.com/question/376455

#SPJ4

A gene that when mutant, causes oligodendrocytes to enwrap sections of axon so that nodes of ranvier are more closely spaced will make the nerve impulses travel slower.

What is a gene?

A gene is the fundamental physical and functional unit of heredity. A gene is made up of DNA. Some genes but not all genes are also responsible as instructions for producing molecules known as proteins. About twenty thousand to twenty five thousand genes varying in different sizes are thought to be present in humans.

Every gene is present in two copies in every person, one from each parent.

Learn more about Gene here:

brainly.com/question/8832859

#SPJ4