Which best describes a rhinovirus?

A. A tube the comes off a virus
B. A virus that causes a common cold
C. A protective shell around a virus
D. A piece of DNA transferred by a virus

From ages 1 to 3, children experience significant brain development, achieving 55% of the adult brain size by age two and rapidly developing cognitive and motor skills. Infants develop basic social and communication abilities, and by the end of the year, may start walking. Toddlers further enhance communication and can form simple sentences and control attention and behavior.

The brain development of a child between the ages of 1 and 3 is marked by rapid changes and milestones. During this period, the size of the brain increases swiftly, achieving 55% of its adult size by age 2. In these formative years, significant cognitive skills are developed. Contrary to Piaget's earlier views, recent research points out that even very young children can understand cognitive development and the properties of objects prior to direct experience with them.

Toddlers exhibit a growth in motor skills and communication abilities. By the age of 3, most children can run, climb stairs, and scribble with crayons. Language develops rapidly, with children starting to form simple sentences and becoming capable of controlling their attention and behavior, a reflection of the rapid growth in the frontal lobes associated with planning, reasoning, memory, and impulse control.

The first years of life are crucial as babies achieve important physical and cognitive milestones. For instance, they begin to smile, pay attention to others, grab toys, and start babbling. By the end of the first year, babies may even begin walking. All these developments underscore the rich cognitive and physical skills gained during the toddler stage.

Answer:

D.II and III only

Explanation:

Monocytes are the agranular leukocytes that serve as precursor of macrophages. When the blood monocytes enter the infected tissue or the site of infection, they are transformed into macrophages to carry out the function of phagocytosis of pathogens and cellular debris. Macrophages are also present in lymphoid tissues such as spleen and lymph nodes to remove the debris and pathogens from the lymph. Hence, macrophages are found in lymph nodes and infected tissues only; not in blood.

Photosynthesis and chemosynthesis are two methods by which organisms create their own food. Photosynthesis uses light energy, while chemosynthesis uses chemical energy.

There are several food making processes, but a couple of common ones include photosynthesis and chemosynthesis. Photosynthesis is a process used by plants and other organisms to convert light energy, usually from the sun, into chemical energy that can be used to fuel the organisms' activities. For example, green plants use sunlight to turn water and carbon dioxide into glucose, which is a type of sugar that the plants use for energy.

Chemosynthesis is another food-making process, which is used by bacteria and other organisms. Rather than using light as an energy source, these organisms use chemicals from their environment to produce carbohydrates. For example, certain bacteria in deep-sea vents use sulfur compounds to perform chemosynthesis.

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The Esophagus is the last organ of the digestive system through which food passes through reaching your stomach. Thus, the correct option for this question is C.

The digestive system may be defined as a type of organ system that contains organs that are responsible for the breakdown of complex food substances into simpler ones that are efficiently utilized by the body in order to derive energy for metabolic purposes.

According to the context of this question, the esophagus is a long and thin tube that passes through the neck, thorax, and diaphragm and directs to a J-shaped muscular organ known as the stomach. A muscular sphincter also known as gastro-oesophageal controls the opening of the esophagus into the stomach.

Therefore, the Esophagus is the last organ of the digestive system through which food passes reaching your stomach. Thus, the correct option for this question is C.

To learn more about the Digestive system, refer to the link:

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Answer:

The correct answer is d. an ecotone

Explanation:

An ecotone is the area of transition between two different biomes so ecotone is the boundary between two different habitats. In this area, two different communities meet with each other for example estuary are water bodies that are found at the place where streams of rivers meet the sea.

Therefore at estuary two ecosystems and their community meet with each other and the transition of river in sea occurs in this area. So estuary is transition phase of fresh water biome to salt water biome therefore the right is d. an ecotone.

Final answer:

An estuary is an ecotone, a biome where fresh water from rivers mixes with salt water from the ocean, creating a unique, nutrient-rich environment that supports a variety of marine life.

Explanation:

An estuary is an ecotone, d. An estuary is a biome where a source of fresh water, commonly a river, meets the ocean, resulting in both fresh water and salt water mixing. This mixture yields diluted, brackish saltwater. Because of the continual mixing of these waters, estuaries are not characterized by deep water. Instead, they provide biologically productive and protected areas where many young offspring of various marine species, including crustaceans, mollusks, and fish, start their lives. The salinity in estuaries plays a significant role, fluctuating with the inflow of fresh water and the coming and going of tides, which influences the adaptations and types of organisms that can thrive here. Estuaries are neither solely freshwater biomes nor are they areas with low concentrations of minerals and nutrients; in fact, they are often nutrient-rich.

Answer:

C. ATTCACATTCA

Explanation:

Duplication mutation occurs when the whole nucleotide sequence of a gene or part of it is copied. Hence, a chromosome has more than one copy of a gene or part of it.  

The given gene sequence is "ATTCATTCA". In option C, the nucleotides at position 4 and 5 are duplicated. This results in the final gene sequence as "ATTCACATTCA". The duplicated segment is shown by "CACA" in the final gene sequence.  

Answer:

c

Explanation:

Correct answer: A). Forecasting weather

A weather radar is an instrument that is used to locate precipitation, calculate its motion and determine the type i.e hail, snow or rain. It sends electromagnetic energy pulse into the atmosphere. If that pulse of energy interacts with something, then it reflects back the energy, which can be sensed by the weather radar.

Nowadays, most radar used are Doppler effect, which has dual polarization, it determines that movement is toward or away from the radar.

Hence, the correct answer would be option A.

Answer:

Answer A

Explanation:

Answer:

A. They can make only their own type of cell

Explanation:

its burst you goobers

Answer: Polluted water is unavailable for further use.

Water pollution is the contamination of water bodies (including oceans, lakes, river and ponds), due to solid, liquid and gaseous forms of waste materials being added up in the water and deteriorates its quality. Water conservation refers to the strategies, policies and activities being planned and implemented by human society to prevent water from being polluted and conserve it for future use.  

Water pollution has drastically impacted over the water conservation. As, due to the fact that with the increase in population cover all over the world, the activities like industrialization, water based transportation and agriculture has increased. These activities has resulted in increase in water pollution and conservation policies are not strictly followed. Hence,the water being polluted once cannot be reused further.

Louis Pasteur, the French chemist, discovered microbial fermentation in 1856 and was fundamental in disproving spontaneous generation. His work led to the development of the germ theory of disease and introduced techniques like pasteurization to safeguard food and beverages.

Discoveries by Louis Pasteur

French chemist Louis Pasteur was pivotal in the discovery of microbial fermentation in 1856, which revolutionized our understanding of the processes of fermentation and food spoilage. His research indicated that microorganisms were responsible for these processes, leading to the development of pasteurization techniques designed to preserve foods such as beer, wine, and milk. Pasteur's findings were instrumental in disproving the then widely held belief in spontaneous generation, affirming instead that airborne microbes caused food spoilage. His work laid the foundation for the germ theory of disease, which held that microbes were also behind infectious diseases.

Pasteur introduced pasteurization to the French wine industry and also developed vaccines against diseases such as anthrax and rabies. These various contributions not only advanced the fields of microbiology and immunology but also brought about significant improvements in public health and hygiene, which drastically reduced deaths from infectious diseases in Europe.

Answer:

The answer is A. In the zone of saturation

Explanation:

When an electron moves down an electron transport chain, it releases energy, which is used to generate ATP and create an electrochemical gradient.

When an electron moves down an electron transport chain, it passes through a series of protein complexes known as electron carriers. As the electron moves from one carrier to another, it releases energy. This energy is used to pump hydrogen ions across a membrane, creating an electrochemical gradient.

The movement of the electron down the electron transport chain ultimately leads to the production of ATP, the energy currency of the cell. At the end of the electron transport chain, the electron combines with oxygen to form water. In summary, when an electron moves down an electron transport chain, it releases energy, which is used to generate ATP and create an electrochemical gradient.

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9/26/18 12:30

The Predators really have the complete upper hand. The predators eat the pray: fathers, mothers, babies. This stops the family tree and lowers the population. IF the Prays population lowers then the predators populations would go down too because they depend on the pray as there food source.

Answer:

The correct answer will be option-

1. option-D

2. Option-C

Explanation:

The process of respiration and photosynthesis are correlated as the product of one process acts as the reactant of another process.

The carbon dioxide and water produced during the cellular respiration acts as the reactant of the photosynthesis process where they help in the formation of the glucose molecule.

Thus, option-D is the correct answer.

CASE II

Cactus requires sunlight to perform photosynthesis reaction to form a food molecule called glucose. If the cactus will be moved from the sunny windowsill to dark then it will not be able to perform photosynthesis.

This represents the case of the disruption in the access to the energy source and thus Option-C is the correct answer.

The correct answer is:

BIOLOGICAL CATALYSTS.

In living cells chemical processes such as synthesis all require the action of biological catalysts. Biological catalysts are enzymes that speed up the chemical processes in the body.

Explanation:

Enzymes are water-soluble protein molecules that can promote up chemical reactions in cells. These reactions constitute respiration, photosynthesis and manufacturing new proteins. For this purpose, enzymes are seldom called biological catalysts. In fact, the human body would not survive outwardly enzymes because the chemical reactions needed to sustain the body simply would not occur fast enough.

Biological catalysts, known as enzymes, are required in living cells for chemical processes such as synthesis.

In living cells, biological catalysts are required for chemical processes such as synthesis. These biological catalysts are known as enzymes, which speed up the rate of chemical reactions by lowering the activation energy. Enzymes are essential for many important biological processes, such as digestion, metabolism, and DNA replication.

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The cell cycle that includes interphase can be associated with both mitosis and meiosis; however, meiosis has additional steps beyond mitotic division, resulting in four haploid, genetically unique daughter cells from a single round of DNA replication.

Can the cell cycle described for mitosis be applied to meiosis as well? The answer is both yes and no. Both mitosis and meiosis involve stages of the cell cycle including interphase, which consists of the G1, S, and G2 phases, but the processes diverge significantly after this point. The mitotic phase includes mitosis and cytokinesis, which together ensure that two genetically identical daughter cells are formed from a single parent cell.

However, meiosis includes two rounds of nuclear division, leading to four genetically distinct haploid daughter cells. While some stages like prophase and telophase share similarities across both mitosis and meiosis, anaphase I in meiosis differs substantially from anaphase in mitosis.

It is important to note that though there are similarities in the cell cycles, meiosis has additional complexity. This is because of the need to halve the chromosome number and to ensure genetic diversity among the resulting cells. The meiosis process is vital for sexual reproduction in eukaryotic organisms and is carefully regulated to produce cells with the capability to fuse with one another, leading to the development of a new organism with a unique set of genes.

cut the dna at a specific location

The right answer is the Krebs cycle

* In prokaryotes, the Krebs cycle occurs in the cytoplasm because they do not have mitochondria.

* In eukaryotes, it occurs in the mitochondrial matrix (meaning that eukaryotes without mitochondria cannot breathe). Pyruvate (the first participant in the Krebs cycle) produced by glycolysis in the cytoplasm can, however, freely enter the mitochondria, both membranes being completely permeable to it.

Final answer:

The central dogma of molecular biology describes the flow of information from DNA to mRNA to protein, involving transcription and translation processes. During transcription, DNA sequences are copied to mRNA, which during translation, specify the sequence of amino acids in a protein.

Explanation:

The central dogma of molecular biology describes the flow of genetic information from DNA to RNA to protein, which is a fundamental principle in biology. The process starts with transcription, where DNA is used as a template to produce messenger RNA (mRNA). Then, during translation, the mRNA serves as a code for the synthesis of proteins, with each trio of nucleotides (codon) corresponding to one amino acid.

During transcription, an enzyme reads the sequence of DNA and creates a complementary strand of mRNA, which then exits the nucleus. In translation, which occurs in the ribosome, the mRNA is read in sets of three nucleotides, each of which specifies a particular amino acid. These amino acids are linked together to form a protein, which then folds into a specific structure to perform its function in the cell. Proteins are responsible for a variety of cellular functions, including motility, DNA regulation, and replication.

The central dogma holds true for all organisms, with some exceptions observed in viral infections. This flow of genetic information is crucial for the synthesis of proteins, which are necessary for the survival and functioning of all living cells.

Answer:

D. carbon dioxide

Explanation:

An increase of a plant's biomass is the result of photosynthesis. Therefore, carbon dioxide and water ultimately contribute to the huge increase in the pine tree's biomass.

(From USATestprep)

Answer:

Carbon dioxide

Explanation:

    Although minerals represent a very low proportion of plant tissue, they are fundamental in CO2 capture via photosynthesis. So, even with adequate solar radiation and temperature, growth can be slow if soil nutrient availability is low. Already, if water is lacking, even if all the factors mentioned above are at optimum level, the evolution will still be low, because, in order not to lose water, the plant closes the holes of the leaf (stomata) through which CO2 should enter, because also that's where you breathe and sweat.

    Understanding, then, the individual effects of the determining factors of plant growth, one can already infer how complex their joint effect is. And in pasture livestock we have yet to consider the need to maintain a constant leaf residue. Therein lies a basic rule in pasture production: to control the intensity of defoliation, that is, to vary the stocking as a function of the variation in plant growth.

Answer:

Complete proteins...