Alex was energetic once he learned to walk, getting into anything he could find. He soaked in every piece of new information, seeming to learn a new skill every day. But after he turned 2, he became lethargic and inattentive. This coincided with his becoming a much pickier eater; he primarily consumes hot dogs with no bun, fast food French fries, and candy. As a result of this diet, he may have developed . Adding ________ to his diet may help reverse his symptoms.
Which of the following are effects of lead poisoning in infants and children?
a. Slowed body growth
b. Type 1 diabetes
c. Impaired hearing
d. Reduced IQ
e. Kidney damage

Answer:

AAC Asn

AAA Lys

AAG Lys

AGU Ser

AGC Ser

AGA Arg

AGG Arg

G

GUU Val

GUC Val

GUA Val

GUG Val

GCU Ala

G

Answer:

In autoimmune diseases, such as lupus, multiple sclerosis and rheumatoid arthritis, people produce antibodies that stick to their body's own proteins and attack healthy cells.

Explanation:

Answer:

Option A

Explanation:

All four types of polysaccharides are homopolymers ie they are made up of repeating units of only one type of monomers.

Starch, glycogen and cellulose are made up of repeating monomeric units of glucose with the number of glucose units and the different linkage types different these molecules. E.g the linkage between glucose units in glycogen is alpha 1-4 linkages and in cellulose, we have glucose in beta 1-4 linkages.

In chitin, a derivative of glucose is present in repeating units, here, we have N-acetyl-D-glucosamine in beta 1-4 linkages.

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:

tho mpal u moan nice not lock yt?

To join two nucleotide in a polynucleotide, phosphodiester bond is used. The correct option is B.

A bond formed by a sugar group and a phosphate group; these bonds make up the sugar-phosphate-sugar backbone of DNA and RNA.

A diester bond connects two different nucleotides to form the nucleotide polymers DNA and RNA.

Thus, the correct option is B.

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He demonstrated that SCD and sickle cell trait were due to the presence of abnormal 8-globin polypeptides in red blood cells. He demonstrated that the electrophhoretic mobility of B-globin from patients with SCD was different from that of healthy individuals. He demonstrated that both parents of multiple patients with SCD had low levels of sickled red blood cells. He hypothesized that SCD was a recessive trait and that the parents of patients with SCD would be heterozygous carriers. He demonstrated that the difference between B-globin polypeptides in individuals who were healthy and those with SCD is an amino acid substitution. He performed a peptide fingerprint analysis on B-globin from individuals with 84 84 and 89 88, which identified the segment of B-globin that was changed by the BS mutation. James Neel Linus Pauling Vernon Ingram

hope it helps..

Answer:

Cattle and other ruminants are significant producers of the greenhouse gas methane—contributing 37 percent of the methane emissions resulting from human activity. A single cow on average produces between 70 and 120 kg of methane per year and, worldwide, there are about 1.5 billion cattle.

While carbon dioxide is typically painted as the bad boy of greenhouse gases, methane is roughly 30 times more potent as a heat-trapping gas. ... As temperatures rise, the relative increase of methane emissions will outpace that of carbon dioxide from these sources, the researchers report.

The cow's rumen is like a large fermentation vat. More than 200 different bacteria and 20 types of protozoa help the cow to utilize fibrous feedstuffs and non-protein nitrogen sources. ... Bacteria adhere to the feed and gradually digest the fermentable material.

“You can probably reduce methane by about 20-25% by altering diet,” he says. One study by researchers at the University of California, Davis, estimated it might be possible to reduce global methane emissions from cows by 15% by changing their diet.

Explanation:

Hope it helps.

Answer:

This question is incomplete. Group of answer choices are:

A. G1

B. G2

C. Prophase

D. Metaphase

E. Anaphase

The correct answer is A.

Explanation:

The G1 phase (Gap 1 phase) is the period of the cell cycle from the time a cell is born until the S phase begins. When the G1 phase begins (just after the division of the stem cell) the size of the newly originated cell is half of its normal size, and the cell must grow to reach it. For this, in this period, RNA and proteins are actively synthesized. During this period, the cell has only the amount of DNA that it has received from its progenitor and each chromosome is made up of a single chromatid, since DNA replication has not yet occurred.

Answer:

I think it uses the original strand as a template for replication.

Answer:

Adaptive or acquired immunity is that we acquire throughout our lives through vaccines (active), breast milk (passive) or injection of specific artificial or natural antibodies to a certain pathogen (passive).

The two great arms of this immunity are the humoral and the cellular.

The humoral refers to the cytokines and immunomodulatory molecules that are responsible for transmitting fundamental messages between defense cells in order to coordinate the destruction of the pathogen between them.

Instead, cellular immunity speaks about cell lineage such as b, t, tcd4 lymphocytes, natural killers, plasmacytes, etc.

It can be said that the humoral factor is the one that coordinates the pathways and the relationships between the cells of the acquired immunity, both are important because the two need each other for adaptive immunity to work.

Explanation:

Examples of the humoral factor: pro and anti inflammatory cytokines, interleukins, complement chain, antibodies, TNF alpha, beta, etc.

Examples of cellular factor: plasmacyst, b lymphocyte, t lymphocyte, NT lymphocyte

Answer: A. Since 2000, there has been an increase in the number of people living with HIV, but a decrease in the number of people newly infected with HIV.

Explanation:

The statement "Since 2000, there has been an increase in the number of people living with HIV, but a decrease in the number of people newly infected with HIV" best supported by the data in the graph. Hence, option A is correct.

The virus known as HIV (human immunodeficiency virus) targets the immune system of the body. HIV can cause AIDS (acquired immunodeficiency syndrome) if it is not treated. Right now, there is no efficient treatment.

Nevertheless, since 1996, there have been fewer new infections. For this reason, we can assume that if we look at the year 2000, we will observe that there was a rise in the number of HIV-positive persons but a decline in the number of HIV-positive people.

Therefore, since 2000, there has been an increase in the number of people living with HIV, but a decrease in the number of people newly infected with HIV.

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The given question is incomplete, so the most probable image of the  question is attached below.

Answer:

See the answer below

Explanation:

Genotype of a true-breeding white, disk-shaped fruit = WWDD

Genotype of a true-breeding yellow, sphere-shaped fruit = wwdd

Crossing the two:

   WWDD    x    wwdd

             WwDd

All the offspring (100%) will have the genotype WwDd with white, disk-shaped phenotype.

Assuming the cross is advanced to F2:

  WwDd    x    WwDd

W_D_    9   White, disk-shaped (9/16)

W_dd     3   White, sphere-shaped (3/16)

wwD_     3   Yellow, disk-shaped (3/16)

wwdd      1    Yellow, sphere-shaped (1/16)

(See the attached image for the Punnet's square)

Answer:

Vernix Caseosa

Explanation:

it's a waxy white substance that covers the babies skin.

Answer:

The skin is covered by VERNIX CASEOSA.

Explanation:

A waxy cheese like white substance.

This is produced by dedicated cells and have some protective roles during fetal development.

Answer:

c: stem cells mitosis stem.

d: the compromised cells differentiate into chondroblasts.

a: New matrix is produced and secreted.

b: Chondrocytes differ, each in its own gap.

Explanation:

The appositional growth of cartilage occurs in an appositional order, thus generating these cartilage structures to give future bone structures or mature cartilages themselves.

In the cartilage of growth of long bones this process happens.

Chondroblasts are differentiated cells that can form the extracellular matrix, and chondrocytes would be the mature form of these that are submerged in their MEC once they reach the secretion limit.

The constant cartilage of cellular, mineral and organic structures, with organic compounds predominating (almost 80 percent are collagen fibers, proteoglycans and glycoproteins), that is why this tissue has a certain elasticity.

b. It will produce a limited variety of gametes with certain alleles being always passed on together.

Crossing over is a process that happens during meiosis, where the 23 chromosomes from the mother mixes with the 23 from the dad, creating an individual with an unique combination of genes. The only chromosome that does not do crossing over is the chromosome Y, because it is too different from his counterpart, the chromosome X.

Answer:

B. The cell is in meiosis II and is ready to complete the second division over.

Explanation:

Hope it helps.

Answer:

Phloem cells are hollow and nonliving, and they form a continuous pipeline that transports sugars.

hope this answer is correct ...

heterozygous means it is not the same gene expression

so both are

Pp'Pp

the second one

The genotypes that he could have used to represent the cross between two heterozygous individuals is: Pp ´ Pp

Therefore, the genotypes that he could have used to represent the cross between two heterozygous individuals is: Pp ´ Pp

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1. Dorsal column-medial lemniscal pathways - It would prevent the body from receiving stimuli related to pain and temperature: Corresponds to sensory pathways related to an organism's proprioceptive awareness. It is through these pathways that sensory stimuli and electrical impulses are transmitted from the body to the brain resulting in the display of quick and efficient responses. If cut, the individual would not be successful in receiving stimuli related to pain and temperature.

2. Anterolateral pathways - It would also prevent the sensation of pain and temperature, in addition to hindering the perception of touch and pressure: Located in the anterior part of the lateral column, this pathway is responsible for the transmission of nociceptive information, generally related to pain awareness. and temperature. Its cut would not only make it difficult to transmit these factors, but it would also make it difficult to transmit extroceptive information to the cortex.

3. Spinocerebellar pathways - would hinder information about the position of body members and joints: This pathway is located between the spinal cord and the ipsilaterally in the cerebellum. It consists of thousands of axonal fibers whose main function is to transmit information about the location of the body members, arms and legs, in addition to their joints. Its cut would make it difficult, or even prevent this information from being captured by the brain.

4. Pyramidal pathways - It would prevent the union of the cerebral cortex to the motor neurons of the spinal cord: It is formed by several axons that extend between the cerebral cortex and the spinal cord passing motor information that would be interrupted if the path was cut.

The Functional problems to be experienced when each fiber tracts is cut ;

1) Inability of to feel pain and temperature stimulus  

2) Inability to perceive touch and pressure by the person

3) Inability to determine position of body organs like hands and legs

4) Prevention of the unionization of the cerebral cortex and the motor neurons

Every Fiber tract found in the human body system play a vital role in the overall functioning of the human therefore when any of the fiber tract is mutilated ( cut ) it presents some functional problems to the body.

When Dorsal column-medial lemniscal pathways is cut It would prevent the human body from receiving pain and temperature stimulus.

When Anterolateral pathways is cut the functional problem experienced is Inability to perceive touch and pressure by the person

When Spinocerebellar tracts are cut the individual will experience the Inability to determine position of body organs like hands and legs

When Pyramidal tracts are cut the functional problem experienced is the  Prevention of the unionization of the cerebral cortex and the motor neurons  located in the spinal cords

Hence we can conclude that the answers to your question are as mentioned above.

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Answer:

Efficacy o disinfectant is relatively greater than that of antiseptics

Explanation:

Most of the reason has to do with the fact that antiseptics are made in a mild form so as to not harm human tissue, while disinfectants are more concentrated and ought to be applied directly to surfaces in order to sanitize them.

Explanation:

Blood is a specialized body fluid. It has four main components: plasma, red blood cells, white blood cells, and platelets.

Answer:

0.19

Explanation:

3.44-3.25 = 0.19

Is B supposted to be 0.29 or 0.19?

The the range of student 1's results is 0.47. The correct option is C.

An experiment is a test in which a system's component is changed to examine how the result is affected.

In order to determine the exact source of the experimental outcomes, tests should ideally involve manipulating as many additional variables as possible.

The process of scientific testing is determining what we would expect to see if a theory were true and contrasting it with what we actually see.

Through testing and experimentation, the scientific method establishes facts in an unbiased manner.

Making an observation, formulating a hypothesis, making a prediction, carrying out an experiment, and then evaluating the findings are the fundamental steps.

The range of student 1’s result is equal to = 3.64 - 3.17 = = 0.47

Thus, the correct option is C.

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Answer:

pre-zygotic reproductive isolation

Explanation:

The molecules regulate the pre-zygotic reproductive isolation mechanism.

Reproductive isolation generally refers to the variety of biological processes that sustain the formation of new species of biological organisms.

Some of these processes act to prevent fertilization or the formation of zygotes between organisms that are not of the same species (pre-zygotic mechanisms) while others ensure that the product of fertilization is invalid in case the former fails (post-zygotic mechanisms).

Some pre-zygotic mechanisms ensure that there exists no form of mating among organisms that are not of the same species due to incompatible reproductive organs, but where this fails, another pre-zygotic mechanism will act so that that the mating will not lead to fertilization and there will not be formation of zygotes.

The prevention of fertilization between organisms with compatible reproductive organs but of different species is carried out by molecules. These molecules ensure that there are locks and keys in place to prevent the fertilization of the egg by the sperm.

Answer:

a. True

Explanation:

Cellular Respiration is the process by which cells of all living organisms obtain the required energy for their metabolic activities. Respiration is a catabolic process whereby glucose is broken down to release Its high energy and used to synthesize a usable form of energy by the cell (ATP).

Cellular respiration occurs in living cells with oxygen (aerobic) or without oxygen (anaerobic). In aerobic respiration, three processes viz: Glycolysis, Kreb's cycle and Oxidative phosphorylation are involved. Oxygen is the final electron acceptor in the Electron transport chain of the Oxidative phosphorylation.

On the other hand, anaerobic respiration is employed by certain bacteria in the absence of oxygen. In anaerobic respiration, another final electron acceptor is used other than oxygen.

Both processes yield Adenosine triphosphate (ATP).

Answer:

1 - Potential   2 - Kinetic  3 - Potential and Kinetic

Explanation:

Potential energy is the energy that an object has when it has a certain amount of elevation from the ground level and to calculate it, we can multiply the mass of the object with the gravitational acceleration constant.

hKinetic energy is the energy that the object has when it has a speed above zero, when it is moving. We can calculate the kinetic energy by multiplying the mass  of the object with it's speed.

In the first option, the pendulum has a height because it is just about to fall down, but it has no speed. So it only has potential energy.

In the second option, the pendulum is between the two ends so it is at the equilibrium point where it has no elevation but it has speed. So İt only has kinetic energy.

In the third option, the pendulum is still moving to the maximum height, so it has both elevation and speed, giving it both kinetic and potential energy.

I hope this answer helps.

Answer:

The genera include...

Mycobacterium

Actinomyces.

Explanation:

The genera Actinomyces and mycobacterium show significant observation of gram positive bacteria because they test positive and give a violet or purple color under microscope when the undergo gram staining which is which uses crystal violet due. They are able to retain the violet color due to their posses of thick peptidoglylcan cell wall.

Actinomyces spp. Of the general actinomyces play an important role in soil ecology, and some species are human pathogens that cause diseases.

Mycobacterium genera example is bacilli which is covered with a mycolic acid coat. This waxy coat protects the bacteria from antibiotics, prevents them from destruction and hinder the penetration by Gram stain reagents. They cause different infectious diseases in humans.

Answer:

A: positive

B: negative

Explanation:

Hope it helps.

Answer

A is positve and B is negitive

Explanation:

Answer:

D

Explanation:

they both produce daughter haploid cells.

Mitosis and Meiosis have all of the following in common, except both results in genetically identical daughter cells. Thus, the correct option is D.

Meiosis may be defined as the type of cell division that forms four daughter cells that are haploid in nature from a parental cell. It is also known as reductional division.

The common methods of both types of cell division are both duplicate their DNA first, both result in cell division, and both have chromosomes line up in the middle of the cell.

Mitosis is only the type of cell division that results in the formation of two genetically identical daughter cells.

Therefore, the correct option for this question is D.

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Answer:

c. increased number of meals eaten outside the home

Explanation:

Environment is the surrounding of living organism, where he gets to survive by meeting its needs.

Environmental factors are factors in the environment that are associated to growth and development example is temperature.

The environment an individual stays have a great influence on the physical expression and character of the individual.

For a fat person the environment had played out his role which should be controlled to achieve a significant weight loss. Increasing number of meals eaten outside the house is one major factor that would not allow such individual to loose weight. Intake of food should be greatly controlled and watched to achieve weight loss.

The process of photosynthesis is onergy storing bocause the process converts light onorgy into chemical energy,