Formulez des hypothèses sur le mode de contamination d'un individu et citez au moins deux conseils pour prévenir la contamination par le virus du rhume

Answers

Answer 1

Answer:

me no speak espanol

Explanation:


Related Questions

what are eukaryotes multicellular makes its own food are called?

Answers

photosynthesis. the process by which plants make their own food and release oxygen into the air. Kingdom Animalia. eukaryotic. multicellular.

How does DNA send it's instructions to the other parts of the cell?

Answers

Answer:Through mRNA, the DNA is able to transmit its messages out to other parts of the cell. (Learn more about mRNA here.) Information from the DNA is coded into mRNA which leaves the nucleus of the cell DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies (the white region) and is used by ribosomes (outlined in green). hope this helps have a great night ❤️❤️❤️

Explanation:

What does evolution mean in biology?
change in species over time
change in individuals over time
change in theories over time
change in ecosystems over time

Answers

Answer:

Evolution

Change in species over time.

In the diagrams of mitotic cell division shown, which structure is present in diagram B but in diagram A?

-centriole
-cell plate
-cell membrane
-cytoplasm

Answers

Answer:

-cell plate

Explanation:

Diagram A is an animal and diagram B is a plant cell. When dividing through mitosis plant cells form a cell plate during the mitotic phase. However, cell plates are not found in animal cells, as they do not have cell walls. Therefore, the answer must be cell plate.

help, will give brainlist!

Answers

Answer:

Predator and prey.

Explanation:

Answer:

B. Predator and Prey

Why is it important for the new cell that the two new double helices are identical to each other?

Answers

DNA must replicate (copy) itself so that each resulting cell after mitosis and cell division has the same DNA as the parent cell. All these cells, the parent cell and the two new daughter cells, are genetically identical. ... The two single strands of DNA then each serve as a template for a new stand to be created.

NEED HELP!!! How do vestigial organs provide evidence for the theory of evolution? A Vestigial organs show differences between our DNA and the DNA of amoebas. B Vestigial organs show traits that a species once needed to have to perform certain tasks. C Vestigial organs show the variation in genes that can exist within one species. D Vestigial organs show how many cells organisms of a species once had.

Answers

Answer:

Vestigial organs show traits that a species once needed to have to perform certain tasks

Explanation:

B. Vestigial organs provide evidence for the theory of evolution:

"Vestigial organs show traits that a species once needed to have to perform certain tasks."

What do you mean by vestigial organs?

"Vestigial organs are the organs that have no apparent function and are considered to be the residual parts from the past ancestors."

What is theory of evolution?

"Theory of evolution is a scientific theory of the origin of species of plants and animals."

What do you mean by species?

"A species is often defined as a group of organisms that can reproduce naturally with one another and create fertile offspring."

What is a trait?

"A trait, as related to genetics, is a specific characteristic of an individual."

How are vestigial organs related to theory of evolution?

"Vestigial organs are often homologous to organs that are functioning normally in other species. Therefore, vestigial organs can be considered evidence for evolution, the process by which beneficial heritable traits arise in populations over an extended period of time."

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Transcribe the DNA
5' GGCTAATTCGAT 3
SHARK

Answers

Answer:

How do your cells know what to do? Just like builders have blueprints to tell them how to build a house, your cells also have instructions. Your cells' instructions are molecules of DNA.

What is DNA?

DNA is the material that makes up our chromosomes and stores our genetic information. When you build a house, you need a blueprint, a set of instructions that tells you how to build. The DNA is like the blueprint for living organisms. The genetic information is a set of instructions that tell your cells what to do.

DNA is an abbreviation for deoxyribonucleic acid. As you may recall, nucleic acids are a type of macromolecule that store information. The deoxyribo part of the name refers to the name of the sugar that is contained in DNA, deoxyribose. DNA may provide the instructions to make up all living things, but it is actually a very simple molecule. DNA is made of a very long chain of nucleotides. In fact, in you, the smallest DNA molecule has well over 20 million nucleotides.

Explanation:

Q.1 WHAT MAKES THAT BLOOD LOOK RED ...............????????​

Answers

Blood looks red due to haemoglobin carried in the blood
I think it is a substance in your red blood cells

What 3 systems get put to work when feeding and how does each one work when you eat?

Answers

Answer:Digestive and muscular systems would be working together to chew food and work it down to the stomach to be digested. The digestive system and circulatory circulatory system would be working together to break food down and move nutrients to cells. The nervous system decides what to eat and when to chew.

Explanation:

Both metamorphic and igneous rocks have crystals. How could we tell the difference between the two types? What would you look for?

Answers

Answer:

igneous rock does not usually have a definite crystal shape

Explanation:

because it is formed from molten magma. after it is cooled and dried. anything caught by the molten magma retains it's shape after cooling

How is cellular respiration a chemical process in which the bonds of food and oxygen molecules are broken and the bonds in new molecules are formed resulting in a release of energy

Answers

Here is some information you need to answer this question:

Cellular respiration equation:

C6H12O6+6O2 -> 6CO2+6H2O

Cellular respiration breaks the glucose (C6H12O6) molecules for energy and new molecules (CO2 and H2O are formed as byproduct).

Overall, there is a release in energy, but also more so of a net increase of energy.

I hope that helps!

What triggers the dive response in humans?

Answers

Answer:

The diving reflex is triggered specifically by chilling and wetting the nostrils and face while breath-holding, and is sustained via neural processing originating in the carotid chemoreceptors.

Explanation:

Which statement is the best decription of how blood circulates through the body?


A. The circulatory system pushes blood upward throughout the body
by using gravity


B. The heart contracts and relaxes causing a force to push the blood
throughout the body.


C. The respiratory system pulls the blood inward when inhaling and
pushes it outward when exhailing.


D. The blood circulates throughout the body by gravity only.

Answers

Oh okie so cute ☺️ cute ☺️ I like lol

The blood circulates throughout the body because of the contraction and relaxation of the heart which pushes the blood throughout the body.  So, the correct option is B.

What is the circulatory system?

The circulatory system is a specialized system for the circulation of blood throughout the body. This blood is rich in nutrients obtained from the digestive system after digestion and oxygen obtained from the respiratory system after breathing.

The circulatory system is like an industrial pipeline system in which a pump or motor, pipes and the component flow through the pipes.

The blood vessels represent the pipes. There are two types of blood vessels, the arteries and the veins which carry oxygenated and deoxygenated blood respectively.

The blood is the component flowing through the blood vessels. The blood is a liquid tissue, in which the liquid component is called the plasma and the cellular component is represented by three types of cells. These are the red blood cells, white blood cells and platelets. The nutrients flow freely in the blood plasma and oxygen is carried by the Red blood cells.

The heart is the pump of this system, it contracts to push blood through the blood vessels and relaxes to allow blood into its chambers. The human heart has four chambers.

Therefore, the correct option is B.

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1. Choose the items that are Inferential Statistics. (Check all that apply)
Give the likelihood of data occurring by chance
Include the mean
Summarize the data
Tell you whether to call your mother about your results
Give a measure of statistical significance

Answers

Answer:

A, D, and E is correct

Explanation: I took the test and got this one correct.

The items that are inferential statistics among the options would be:

Give the likelihood of data occurring by chanceTell you whether to call your mother about your resultsGive a measure of statistical significance

This is largely due to the fact that inferential statistics refer to the branch of statistics that draws conclusions from a set of data. It is as opposed to descriptive statistics which focus on summarizing, describing, arranging, and or categorizing data in such a way that trends are shown at a glance.

Statistical parameters such as mean, mode, and median only measures attributes of data relating to the measure of central tendencies. Data summary is purely descriptive

Hence, the items selected are those that are conclusive and not descriptive.

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if you found 20% thymine in a sample of DNA, how much cytosine would you find?

A. 80%
B. 20%
C. you cant be sure without knowing how much guanine is in the sample
D.30%

Answers

Answer:

The answer would be D. 30%

Explanation:

Hope this is helpful!!!

The answer is D. 30% I just did it and it is 30%

The colors of various main sequence stars are shown below.
Which list correctly ranks these stars in order of increasing temperature?

Answers

Answer:

Barnard's Star, Sun, Altair, Achernar

Explanation:

red is the coolest temperature and blue is the most hot

Cockroaches have low genetic diversity, yet are in no danger of going extinct. Which statement is most correct about the reproductive success of cockroaches?

A. Cockroaches are the "fittest" of all beetles.
B. Cockroaches have adaptations to be able to live in any environment.
C. Cockroaches have evolved to be generalists.
D. Cockroaches have adaptations that allow for interbreeding without any harm.

Answers

Answer:

B

Explanation:

Answer:

B

Explanation:

cockroaches have adaptations to be able to live in any environment

explain how identical and non-identical twins happen

be quick​

Answers

Answer:

one fertilised egg splits and develops into two babies with exactly the same genetic information.

Explanation:

A stick insect has body parts that look like sticks and are a similar color to the trees
they live in. How does this help the stick insect to survive?

Answers

Because they can camouflage and hide from other animals trying to eat it

what is the answer? please ​

Answers

I believe it is Dd but I can’t be sure without all the information.

Scottish Highland cattle, which have long hair, are suited for cold, damp climates of the Scottish isles. On the other hand, Brahman cattle, which have short hair, are suited for a warmer climate. This comparison is an example of:
A. adaption
B. taxonomy
C. polyploidy
D.punctuated equilibrium

Answers

A) Adaption because since it is colder in the Scottish isles the cattle there have longer hair due to adaption and the Brahman cattle have short hair due to there adaption in the warmer climate so they don’t over heat.

If you want to make 50mL of a 15% glucose solution, how many grams of glucose do you need to weigh out?

Answers

Answer:

49.85

Explanation:

So it's super simple u just have to use the calculator and press 50 minus 15% which is equal to 49.85


1. the process by which organisms produce new organisms of the same type ____________________
2. a method of reproduction in which all the genes passed on to the offspring come from a single individual or parent
______________________________
3. a method of reproduction that involves two parents producing offspring that
are genetically different from either parent _________________________
4. an organism that is genetically identical to the organism from which it was produced ________________________
5. the male sex cell __________________
6. a sex cell produced by a female __________________________
7. an egg or sperm cell; a sex cell
8. the cell division process that divides the cell’s nucleus into two, each with a complete set of genetic material from one parent
cell ___________________________
9. the cell division process that results in the production of sex cells (sperm and egg)
________________________________
10. the process that combines a sperm cell and an egg cell _____________________
11. the cell that results from the joining of the egg and sperm
_________________________________
12. the process that transforms developing cells into specialized cells with
different structures and functions
__________________________________
13. the organ of the human female reproductive system that produces an egg cell, the female gamete
____________________________________

14. female reproductive hormone (either one) __________________________
15. female reproductive hormone (either one)
_________________________
16. the organ, in female animals, where the embryo develops into a fetus _________________________________
17. the organ that enables nutrients and oxygen to pass from the mother’s blood to the fetus, and waste products to pass from the fetus to the mother’s blood
________________________________
18. the male reproductive organ, that produces sperm and the hormone testosterone
________________________________
19. a hormone associated with male sexual development and reproduction
________________________________
20. structure in female where fertilization occurs______________________________

Answers

Answer:

Sexual reproduction was an early evolutionary innovation after the appearance of eukaryotic cells. The fact that most eukaryotes reproduce sexually is evidence of its evolutionary success. In many animals, it is the only mode of reproduction. And yet, scientists recognize some real disadvantages to sexual reproduction. On the surface, offspring that are genetically identical to the parent may appear to be more advantageous. If the parent organism is successfully occupying a habitat, offspring with the same traits would be similarly successful. There is also the obvious benefit to an organism that can produce offspring by asexual budding, fragmentation, or asexual eggs. These methods of reproduction do not require another organism of the opposite sex. There is no need to expend energy finding or attracting a mate. That energy can be spent on producing more offspring. Indeed, some organisms that lead a solitary lifestyle have retained the ability to reproduce asexually. In addition, asexual populations only have female individuals, so every individual is capable of reproduction. In contrast, the males in sexual populations (half the population) are not producing offspring themselves. Because of this, an asexual population can grow twice as fast as a sexual population in theory. This means that in competition, the asexual population would have the advantage. All of these advantages to asexual reproduction, which are also disadvantages to sexual reproduction, should mean that the number of species with asexual reproduction should be more common.

However, multicellular organisms that exclusively depend on asexual reproduction are exceedingly rare. Why is sexual reproduction so common? This is one of the important questions in biology and has been the focus of much research from the latter half of the twentieth century until now. A likely explanation is that the variation that sexual reproduction creates among offspring is very important to the survival and reproduction of those offspring. The only source of variation in asexual organisms is mutation. This is the ultimate source of variation in sexual organisms. In addition, those different mutations are continually reshuffled from one generation to the next when different parents combine their unique genomes, and the genes are mixed into different combinations by the process of meiosis. Meiosis is the division of the contents of the nucleus that divides the chromosomes among gametes. Variation is introduced during meiosis, as well as when the gametes combine in fertilization.

Explanation:

By the end of this section, you will be able to:

Explain that variation among offspring is a potential evolutionary advantage resulting from sexual reproduction

Describe the three different life-cycle strategies among sexual multicellular organisms and their commonalities

Understand why you could never create a gamete that would be identical to either of the gametes that made you

A person has polydactyly (extra fingers or toes). Polydactyly is caused by a dominant allele.
What is the smallest number of copies of the dominant allele for polydactyly that could be found in a body cell of this person?

Answers

Answer:

1 I think, read the explanation.

Explanation:

Offspring need to carry just one dominant allele from their parents to inherit the polydactyl condition. The probability of the offspring having polydactyly is 50% (2 of the 4) and 50% not having it (normal). This can be expressed as a ratio, 2:2 which can be simplified to 1:1. - found on the internet

According to the diagram below how are metamorphic rocks formed
A. Wastes deposited by plants and animals decompose and weather
B. Other rocks experience intense heat and pressure
C. Sand and other particles are buried,compacted, and cemented together
D. Molten rock cools and turns solid

Answers

When rocks are exposed to extreme temperatures, high pressures, hot mineral-rich fluids, or, more frequently, some mixture of these conditions, metamorphic rocks are created. These kinds of conditions can be obtained deep within the planet or where plate tectonics collide.

What two processes result in metamorphic rocks?

Heat and pressure cause an existing rock to change into a new rock, creating metamorphic rocks. When hot magma hits rock, contact metamorphism takes place. Under the intense heat and pressure produced by tectonic forces, regional metamorphism changes substantial portions of existing rocks.

Most metamorphic rocks are formed where?

The majority of metamorphic rocks are formed underground. Extreme pressure and heat are used to produce them. This includes any procedure where heat, force, or the use of chemical fluids change the structure or makeup of a rock while it is still solid.

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Answer:

B. Other rocks experience intense heat and pressure

Explanation:

I got this same question

90% H2O 10% Solute The solution is: hypertonic / hypotonic / isotonic Water will: not move / move into the cell / move out of the cell

Answers

Answer:

Hypotonic / moves into the cell.

Explanation:

Hope you have a nice evening.

The solution is hypotonic. Water will move into the cell.

What is hypotonic solution?

A hypotonic solution is one where the concentration of solutes outside the cell is lower than the concentration inside the cell. In this case, the solution is composed of 90% water and 10% solute, which is a lower concentration of solutes than inside the cell.

As a result, water will move into the cell in order to balance the concentration of solutes and maintain homeostasis. This can cause the cell to swell and may even lead to lysis if the cell is unable to handle the increased volume.

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Glucose provides energy for cells. Different cells have different mechanisms for glucose intake. Intestinal cells contain proteins that transport glucose against its concentration gradient. These proteins couple the movement of glucose to the movement of sodium down its concentration gradient. Red blood cells have transporter proteins embedded in their membranes. When bound by a glucose molecule, these proteins change shape and allow glucose to move down its concentration gradient into the cell.

Based on this information, what type of transport is used for glucose in blood and intestinal cells?
Which type of tissue performs the role of signal conduction in the body?

Answers

Answer:

food energy to the body 72-hour make your body healthy enough for different type of exercises in a day

Why do you think having such an extensive membranous area is beneficial when performing photosynthesis?

Answers

Answer:

Increasing the membrane area also increases the number of ATP and NADPH generating sites

Explanation:

Photosynthesis occurs in the chloroplast, more precisely in the membranes of the thylakoids that form stacks of disks called grana. A mature chloroplast may have 20 to 60 grana. In these membranes, there are photosystems, which are structural units of pigment-protein complexes that convert light energy from the sun into chemical energy stored in ATP and NADPH. A thylakoid may contain thousands of photosystems. In consequence, increasing the membrane area also increases the number of photosystems required for the synthesis of ATP and NADPH.

the long-distance runner is running at a constant speed of 5 m/s. how long does it take the runner to travel 1 km?​

Answers

200 seconds, or 3 minutes and 20 seconds.

1 km= 1000 meters

1000 meters divided by 5 meters every second, means that it’ll take 200 seconds to go that distance.
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