Un niño que ha enfermado de paperas o varicela, no desarrollará estas
enfermedades en una segunda oportunidad, porque:

I. la piel, mucosas y lágrimas impiden el ingreso de los microbios.

II. en el primer contacto adquirió anticuerpos.

III. interviene la inmunidad Adaptativa, la cual presenta "memoria".

IV. su sistema defensivo está preparado frente a una segunda exposición

a. I y II son correctas

b. III y IV son correctas

c. II, III y IV son correctas

d. I, II y III son correctas.

No, two positive charged particles on combination will not form a neutral particle.

When an organism breathes, oxygen enters the body. An organism's body absorbs glucose when it consumes.

During cellular respiration, the reaction between glucose and oxygen produces ATP. As byproducts, water and carbon dioxide are emitted.

The Krebs cycle is the second stage of cellular respiration. Pyruvic acid is used in the Krebs cycle, along with other molecules like NADH, FADH2, and CO2, to produce ATP.

No, the resultant particle would have a +2 charge if two positive particles combined. Both glucose and oxygen are reactants in cellular respiration.

To know about neutral

https://brainly.com/question/12498769

#SPJ4

As we can see in the punnet square we have a recessive homozygous and a dominant homozygous, in the possible combinations that can have the offspring, that is to say the letters inside square we can see that all are heterozygus, e

Parts of the flower:

1. pistil

2. petal

3. leaf

4. receptacle or stem (location of number is not clear)

Answer to question 1 is receptacle or stem.

Answer to question 2 is petal

Answer to question 3

The reproductive organs of the plant are stamen, stigma, calyx, pistil, and colas.

Stamen is the male part of a flower. Stigma is responsible for collecting pollen grains. Calyx is a component of sepals and responsible for protecting the inner part of the flower while it is under development. Pistil is the female reproductive part of the flower. Cola is the bud. It is a cluster of buds. In general, the reproductive parts are the androecium (group of stamens) and gynoecium (carpels/pistils).

The modification of the stem takes place through the development of various tissues, including the primary and secondary growth of the stem. In general, the stem's primary growth occurs at the tip, which contains the apical meristem, a specialized tissue that produces cells for growth. Meanwhile, the secondary growth occurs in the lateral direction, and it involves the formation of secondary tissues like cork cambium and vascular cambium.

Cork Cambium: Cork cambium forms in the outer layers of stems and roots of many plants. The cells produced by the cork cambium differentiate into cork cells, which form a protective layer called bark. Cork cells are typically dead, and their cell walls contain a waxy substance known as suberin. Cork cambium helps protect the stem from insects, temperature changes, and mechanical damage. Examples include the bark of trees, potatoes, and sweet potatoes.

Vascular Cambium: Vascular cambium forms a cylinder of cells that extends along the length of the stem and roots of many plants. The cells produced by the vascular cambium differentiate into xylem and phloem cells, which transport water and nutrients throughout the plant. Xylem is responsible for the transport of water and minerals from roots to the leaves, while phloem is responsible for the transport of food from the leaves to other parts of the plant. Examples of plants that have vascular cambium include trees, shrubs, and many other woody plants.

In conclusion, the modification of the stem occurs through the development of various tissues, including the primary and secondary growth of the stem. Examples of the secondary growth are cork cambium and vascular cambium that form in the outer layers of stems and roots of many plants. Cork cambium forms a protective layer called bark while vascular cambium forms a cylinder of cells that extends along the length of the stem and roots of many plants.

know more about  stem's primary growth click here:

https://brainly.com/question/14426239

#SPJ11

Answer:

Diffusion and osmosis don't require the cell to expend any of its own energy, as they are passive processes. As we know both are passive processes and yet (in basic, short terms) diffusion is higher to lower and osmosis is lower to higher, so movement to concentration doesn't determine whether it is active or passive.

Explanation: ur welcome

In a DNA fingerprinting experiment, we are trying to determine the unique genetic patterns of individuals for identification purposes.

DNA fingerprinting, also known as DNA profiling, is a technique used to identify individuals by analyzing their unique DNA sequences. This is done by extracting a sample of DNA from a person, typically from blood, hair, or saliva, and then analyzing specific regions of the DNA, known as markers, that vary between individuals. These markers are used to create a distinctive genetic pattern, or "fingerprint," which can then be compared to other DNA samples for identification or establishing biological relationships. In a DNA fingerprinting experiment, the primary goal is to determine these unique genetic patterns to accurately identify individuals or establish relationships between them, such as in paternity testing, criminal investigations, or disaster victim identification.

Thus, the DNA fingerprinting experiment is to determine the unique pattern of DNA fragments that an individual possesses in order to identify and compare DNA samples. This technique has important applications in forensic science, paternity testing, and evolutionary biology.

Learn more about fingerprinting here:

https://brainly.com/question/14161927

#SPJ11

Answer:

B. Most aquatic animal bites result from an animal's defensive response to a perceived threat or, on rare occasions, from a case of mistaken identify.

Explanation:

Carpels, also known as pistils, are the female reproductive part of a flower. They consist of three main parts: the stigma, style, and ovary. Petals are usually colourful and attract pollinators to the flower. They are often modified in terms of size, shape, colour, or texture compared to typical leaves.

Sepals are the outermost whorl of floral parts, typically green and located at the base of the flower. They protect the developing flower bud and are often leaf-like in appearance. Sepals are also considered modified leaves. Based on studies of plant evolution, the stamen is not considered a modified leaf. The stamen is the male reproductive part of a flower and typically consists of two main parts: the filament and the anther. The filament is a slender stalk that supports the anther, where pollen is produced. Therefore, among the options provided, the stamen is not a modified leaf.

Learn more about plant evolution here ;

https://brainly.com/question/23243729

#SPJ11

The eye movement allowing the ability to smoothly follow an object is known as smooth pursuit.

Smooth pursuit is a type of voluntary eye movement that allows us to track and follow moving objects with precision and smoothness. It involves the coordination of various eye muscles to ensure that the eyes stay fixated on the moving target.

mooth pursuit enables us to visually track objects across the visual field, whether it's a flying bird, a speeding car, or a bouncing ball. This tracking ability is crucial for activities such as sports, driving, and visual perception in general, providing us with a continuous and stable visual experience.

Learn more about smooth pursuit. '

https://brainly.com/question/31846359

#SPJ11

Answer:

Lens

Explanation:

The area of the retina on which the light rays focus is the fovea, which is a small, central pit located in the retina that is responsible for vision, and there are rod and cone cells present in the human eye too.

There are several types of eyes present in the ecosystem, such as eye patterns, and the composition of the human eye is different from that of the dog and the cow, but this is the organ of vision, which allows the individual to see the world for nutrition, predation, navigation, communication, etc. Apart from that, it provides visual information about the shape, size, and color of objects and is involved in many other functions, such as the sleep-wake cycle,

Hence, the area of the retina on which the light rays focus is the fovea, which is a small, central pit located in the retina that is responsible for vision, and there are rod and cone cells present in the human eye too.

Learn more about the significance of the eyes here.

https://brainly.com/question/15686038

#SPJ5

The platysma muscle covers the anterior surface of the neck.

The platysma muscle is a thin, sheet-like muscle that covers the anterior surface of the neck.

It is a broad muscle that extends from the upper part of the chest and shoulders to the lower jaw and mouth.

The platysma muscle is located just beneath the skin of the neck and is easily visible when the neck is tensed or during certain facial expressions.

The platysma muscle plays a role in various movements of the neck and lower face. It can contract to tense the skin of the neck and help pull down the lower jaw.

Additionally, it is involved in facial expressions such as frowning or grimacing.

The platysma muscle is innervated by the facial nerve (cranial nerve VII) and receives its blood supply from branches of the submental artery and subclavian artery.

Overall, the platysma muscle is an important muscle that covers the anterior surface of the neck and contributes to both the functional movements and aesthetic appearance of the neck and lower face.

To know more about "Platysma muscle" refer here:

https://brainly.com/question/32117541#

#SPJ11

The structure that covers the anterior surface of the neck is the platysma muscle.

The structure that covers the anterior surface of the neck is the platysma muscle. The platysma is a thin, sheet-like muscle that extends from the chest upward to the lower jaw. It is responsible for various movements of the lower face and neck.

The platysma muscle helps in actions such as opening the mouth, pulling down the corners of the mouth, and tensing the skin of the neck. It plays a role in facial expressions and is involved in actions like grimacing and expressing surprise or fear.

About anterior surface here:

https://brainly.com/question/31663632

#SPJ11

Darwin's theory of evolution by natural selection is satisfying because it provides an explanation for the transformation of simplicity into complexity in various organisms.

Darwin's theory of evolution by natural selection proposes that through the process of variation, inheritance, and differential survival and reproduction, species gradually change over time. This theory offers a compelling explanation for the development of complex traits and structures in organisms. By emphasizing the role of gradual changes over long periods, Darwin's theory shows how simplicity can give rise to complexity through cumulative adaptations.

The appeal of Darwin's theory lies in its ability to account for the diversity and complexity of life on Earth. It explains how organisms with simple features can evolve into more complex ones over generations, driven by natural selection. This process occurs through the accumulation of advantageous traits that enhance an organism's survival and reproduction in its environment. As these adaptations persist and accumulate, complexity can emerge, allowing organisms to better adapt and exploit their surroundings.

To know more about Darwin's theory of evolution click here,

https://brainly.com/question/31110136

#SPJ11

Four hydrogen nuclei are converted to helium nuclei in the proton-proton chain. This does not occur naturally on Earth because the process requires it. extremely high temperatures, pressures, and densities

The proton-proton chain is a series of reactions that fuses four hydrogen nuclei to form one helium nucleus. The energy is derived from the mass difference between the four hydrogen nuclei with higher masses and the single helium nucleus with lower masses. Energy is released when hydrogen is fused into helium: mass to energy conversion. Because mass is created during the proton-proton chain, energy is released. However, this is essentially the end of the story for the nuclear fusion reactions that occurred in the early Universe, known as Big Bang Nucleosynthesis.

Learn more about proton here:

https://brainly.com/question/1252435

#SPJ4

Answer:

the amino acid sequence

Explanation:

Answer:

Because each the cells would have different functions on different organisms.

Explanation:

Bacteria cells are usually prokaryotic which means that it is only composed of one cell. The single cell already has everything it needs so therefore, it isn't as complex as plant and animal cells.

Plants are autotrophs and produce their own food through photosynthesis. Plant cells would have a large vacuole, cell wall, chloroplasts, unlike animal cells.

Animal cells have all the cell organs that plant cells except a large vacuole, cell wall, and chloroplasts. Animal cells also have lysosomes in which plant cells don't.

A threshold stimulus applied to an excitable membrane is one that is just sufficient to: trigger a graded potential or an action potential in the membrane, or to cause net inward movement of positive charge through the membrane. The correct option is A and C

A graded potential is a membrane potential that varies in magnitude depending on the strength of the stimulus. It is a relatively small, local potential that occurs in response to a stimulus but does not generate an action potential.

An action potential is an all-or-nothing response, meaning that the same stimulus strength is always required to trigger the action potential. It is an electrochemical signal that travels along the membrane of a cell, initiating a signal cascade that produces a physiological response.

The net inward movement of positive charge is caused by the opening of specific ion channels in the membrane when stimulated. This allows a greater number of positively charged ions to enter the cell, resulting in a net inward movement of positive charge through the membrane.

In summary, a threshold stimulus applied to an excitable membrane is one that is just sufficient to trigger a graded potential, an action potential, or to cause net inward movement of positive charge through the membrane.

To know more about membranes refer here:

https://brainly.com/question/14851834#

#SPJ11

The DNA sequences that are binding sites for transcription factors are called origin of transcription.

DNA binding sites found in DNA where other molecules may bind. DNA binding site are part of DNA sequences (genome) and are bounded by DNA-binding proteins. The sum of DNA binding site of a specific transcription factor is referred to as cistron.

Transcription factors are protein that bind to DNA sequences to regulate gene transcription. These proteins bind to the DNA of promoter or enhancer regions of specific genes.

Specific transcription factors are important in initiating patterns of gene expression that result in developmental changes. Many transcription factors are common to several cell types such as AP-1 and play general role in regulation of inflammatory genes.

Transcription factor that bind to cis-regulator DNA sequences are responsible for either positively or negatively influencing the transcription of specific genes and determining whether that particular gene will be "on" or "off".

To know more about transcription,

https://brainly.com/question/1246654

The DNA sequences that are binding sites for transcription factors are called Response Elements (REs). The binding sites for transcription factors are called Response Elements (REs).

DNA sequences that are binding sites for transcription factors are called Response Elements (REs). These sites, which are usually located in the promoter region of the gene, regulate gene expression by interacting with transcription factors. Transcription factors are proteins that bind to DNA and regulate the transcription of genes.

They are necessary for the initiation and regulation of gene expression. REs play a crucial role in gene regulation, as they help to turn on or off gene expression. When transcription factors bind to REs, they either activate or repress transcription, depending on the nature of the factors involved. The specificity of this interaction is important, as different transcription factors bind to different REs, allowing for precise regulation of gene expression.

Overall, REs are critical components of gene regulation, as they help to control the expression of genes in response to different signals and environmental cues.

Learn more about transcription here:

https://brainly.com/question/6604811

#SPJ11

Answer:

The element carbon is actually the chemical basis for all life. It is the most important because it can be used to form many essential compounds.

Carbon takes up almost 20% of the weight of an organism, and it is essential for them to live and grow. (Also to reproduce.)

Some species boast armature such as thorns, or spines that ward off slavering herbivores. Some are loaded with poisons to sicken or kill them. And while tomatoes may not be able to scream, as L. Ron Hubbard once claimed, some plants do emit compounds that warn their compatriots of approaching threats: the botanical equivalent of a smoke signal.

Answer:

by suckshining the infant

Explanation:

Bronchial circulation differs from pulmonary circulation in that it provides blood supply to the structures of the lungs themselves, including the bronchi, bronchioles, and connective tissues.

This circulation is responsible for delivering oxygenated blood to the lung tissues and removing deoxygenated blood. In contrast, pulmonary circulation refers to blood flow between the heart and the lungs, specifically involving the exchange of oxygen and carbon dioxide in the alveoli. It supplies deoxygenated blood from the right side of the heart to the lungs for oxygenation and returns oxygenated blood to the left side of the heart for distribution to the rest of the body.

To learn more about the Bronchial circulation

brainly.com/question/1136645

#SPJ11

The pan-genome of Lactococcus lactis is expected to be larger than its core genome and represents the total genomic diversity of the species across different strains.

The most likely representation of the pan-genome of the bacterium Lactococcus lactis would be larger than its core genome, as the pan-genome includes both the core genes and the accessory genes found in different strains of the bacterium. The pan-genome refers to the total set of genes present in a species, encompassing the core genes shared by all strains and the variable genes that are unique to specific strains or subsets of strains.

In the case of Lactococcus lactis, with a core genome of 1,500 genes, the pan-genome would likely consist of the core genes plus additional genes that are present in some strains but not in others. These additional genes contribute to the genetic diversity and adaptation potential of the bacterium. As more strains of Lactococcus lactis are sequenced and analyzed, the pan-genome can expand, revealing new genetic elements and variations within the species.

To know more about pan-genome

brainly.com/question/15608022

#SPJ11

The primary consumer is the organism that eats the producer. It gets the at least 10% of the energy stored in a producer. It is above the producer at the trophic level. It may be a herbivore or an omnivore.

ANSWER: Zooplankton, Herbivorous ducks, small planktivorous fish

Answer:

a particle of matter that uniquely defines achemical element

Explanation:

atoms make up everything you can see and even stuff you can't see

Answer:

Basic unit of a chemical element.

Explanation:

If defined as the smallest unit of matter, this is incorrect, as that would be electrom, protn, nuetron, that stuff, and even smaller is quarks that make up the prior three things. So DONT define as smallest unit.

Individual 3's genotype is XbXb. When The chart below shows the family tree of a person who has red-green colorblindness, a genetic condition that is sex-linked and recessive.

No, because the X chromosome is only found in males in a single copy. They cannot serve as carriers. A woman is married to a man with normal vision, but she is colorblind in the red-green spectrum.

In the case of eye color, "B" denotes a brown allele while "b" denotes a blue allele. A homozygous dominant genotype is characterized by the presence of two dominant alleles for a trait in an organism. This genotype is designated as BB using the example of eye color.

To know more about XY genotype visit:-

https://brainly.com/question/9402667

#SPJ4

Answer:

The age of the rock is 5 million years

Explanation:

Fraction of radioactive substance remaining = 6.25% = 625/10000 = 1/16

Number of half-lives undergone by the substance to leave behind 1/16 of the original sample

1/16 = (1/2) * (1/2) * (1/2) *(1/2)

Therefore, the substance have decayed 4 times

One half=life = 1.25 million years

Four half-lives = 4 * 1.25 million years = 5 million years

Therefore, the age of the rock is 5 million years

I only know no 2

According to the biological species concept, organisms belong to the same species if they can interbreed to produce viable, fertile offspring. Species are separated from one another by prezygotic and postzygotic barriers, which prevent mating or the production of viable, fertile offspring.

Answer:

1) [J] Sand dollar, 2) [G] Ants and grasshoppers, 3) [A], 4) [G]

Explanation:

Please don't be mad if I'm wrong on a few I'm in AP Environmental Science so I'm kind of keen on this stuff but still I'm trying to help!

Based on the gene map, the two genes that are closest together are Aristaless (0.0) and Star eye (1.3), so these two genes can be circled in red.

The pair of genes that are furthest apart are Aristaless (0.0) and Vestigial (67.0) wing, so these two genes can be underlined in green.

The gene that is most likely to be inherited with Vestigial wing is Reduced bristles (51.0), which can be marked with a blue X.

A gene is a segment of DNA that carries information needed to produce a specific protein, which in turn determines specific traits in an organism. Genes control the physical and functional characteristics of an organism, from eye color to disease resistance. They act as a set of instructions for the development and function of cells and tissues. Genes are made up of sequences of four chemical bases: adenine (A), cytosine (C), guanine (G), and thymine (T).

To know more about gene, visit:

https://brainly.com/question/8832859

#SPJ1