The first strands of DNA were observed through which microscope?

Answers

Answer 1

Answer:

it was tru an electron microscope.

Explanation: need any more help ask me


Related Questions

What are the functions and vessels of the heart, and what are some cardiac disorders that might be life-threatening to a person or an animal?

Answers

Answer:

The cardiovascular, or circulatory, the system supplies the body with blood. It consists of the heart, arteries, veins, and capillaries. but the things that might be life-threatening to a person or animal are;

Explanation: angina is a type of chest pain that occurs due to decreased blood flow into the heart this can harm animals and people. there is also - - - arrhythmia,which is or an irregular heartbeat or heart rhythm,

- congenital heart disease, in which a problem with heart function or structure is present from birth.

-coronary artery disease, which affects the arteries that feed the heart muscle.

- Heart attack, or a sudden blockage to the heart’s blood flow and oxygen supply this can kill. heart failure, wherein the heart cannot contract or relax normally,

- dilated cardiomyopathy, a type of heart failure, in which the heart gets larger and cannot pump blood efficiently and the last one is  

- hypertrophic cardiomyopathy, in which the heart muscle walls thicken and problems with the relaxation of the muscle, blood flow, and electrical instability develop

these are only a few that can harm or even kill a living thing like and animal or person these things are really harmful.

I hope this helps you!!

26. A student reads this advertisement for a product containing a plant


micronutrient that can be added to soil.


Miracle Micro-B Makes Your Garden Grow!


Miracle Micro-B contains


2. 0 g of boron, a


micronutrient that is


vital to reproduction in


plants. We recommend


continuous application


of Miracle Micro-B to


your garden plants or


crops.


Based on this information, the student can conclude that boron is absorbed


by plant roots from soil and then


A. Transported to reproductive tissues by the plant's shoot system


B. Stored in plant stems until the flowers are pollinated


C. Concentrated in the roots until the plant's reproductive tissues mature


D. Transported by the phloem to the stomata in leaves, where it


attracts pollinators


Lo

Answers

Based on this data, the student can conclude that boron is absorbed and transported to reproductive tissues by the plant’s shoot system.

Whta is the plant shoot system?

The plant shoot system refers to the organ system that absorbs nutrients (micronutrients) from other parts than the soil.

The plant shoot system is a fundamental organ system for the normal functioning of plants.

In conclusion, based on this information, the student can conclude that boron is absorbed and transported to reproductive tissues by the plant’s shoot system.

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Where does most of the power in homes come from?

Answers

Answer: Natural Gas

Explanation:

Electricity and natural gas are the most-used energy sources in homes. Electricity is used in almost all homes, and retail electricity purchases accounted for 43% of total residential sector end-use energy consumption.

pls help. Which is the example of long bone?

Answers

Answer:

it's either c or d but I'm not sure

Explanation:

17) Determine the expected phenotypic ratio of offspring from a cross between a striped watermelon
with thick skin and a light green watermelon with thick skin
• Striped watermelons result from a cross between a light green watermelon and a dark green
watermelon

Thick skins are dominant to thin-skins
[5]
Parents:

Answers

The expected phenotypic ratio of offspring from a cross between a striped watermelon with thick skin is 1/2 thick skin and 1/2 striped watermelon.

What is dominance?

In genetics, dominance refers to the expression of a given allele or gene variant in heterozygous individuals.

In dominance, this dominant allele masks the expression of the recessive allele for a given gene locus.

In conclusion, the expected phenotypic ratio of offspring from a cross between a striped watermelon with thick skin is 1/2 thick skin and 1/2 striped watermelon.

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Describe a selected aspect of present and past climate and the associated physical parameters (eg, temperature, precipitation, sea level) or chemical composition (e.g. ocean pH) of the atmosphere geosphere, hydrosphere or cryosphere, related to the severe weather phenomena you chose. Include changes over time.​

Answers

Tsunami impacts are expected to be intensified due to climate change related sea level rise.

Tsunami and the sea level

Sea ​​level rise can significantly amplify the risk of tsunamis, which means that small tsunamis in the future could have the same adverse impacts as large tsunamis today.A modest 0.5 meter rise in sea level will double the risk of tsunamis in Macau.

With this information, we can conclude that tsunami impacts are expected to be intensified due to climate change related sea level rise.

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Do humans share a common ancestor with yeast? How do you know?
HELP PLSSSSSSSSSS

Answers

Yeast possesses 23% homologous genes to humans; therefore, it is considered as a useful model for gene function studies. Although yeast and human diverged from a common ancestor approximately 1 billion years ago, lines of evidence demonstrate the strong conservation of gene function between yeast and humans

Proteins have all of the following properties except enzymes

Answers

Proteins have all of the properties except genetic material.

What do you mean by Proteins?

Proteins may be defined as naturally emerging, extremely complicated substances that consist of amino acid residues joined by peptide bonds.

Proteins have the following properties:

They are enzymes.Work as signaling molecules in numerous signaling. They are involved in the transport of materials. They provide a structural arrangement to the cells.

Therefore, proteins have all of the properties except genetic material.

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how do microorganisms affect the environment?​

Answers

Answer:

Microbes are everywhere in the biosphere, and their presence invariably affects the environment that they are growing in. The effects of microorganisms on their environment can be beneficial or harmful or inapparent with regard to human measure or observation.

n this experiment, you need to examine the idea of thermal energy transfer. Using a controlled experiment, what might a good question about the variables that affect thermal energy transfer be? Thermal energy transfer depends on many properties, but limit your question to only two.

Answers

The thermal conductivity and temperature difference between the surrounding plays a crucial role in the transfer of thermal energy between the materials.

What are the three modes of thermal energy transfer?

The three modes of thermal energy transfer include conduction (direct contact of atoms), convection (migration of warm particles), and radiation (migration of electromagnetic waves).

The first property is thermal conductivity. Examples include a cube of ice when positioned in the hand of a man. It causes the ice to melt via the thermal conduction from men's hands.

The second property is the temperature difference. Examples include when a hot cup of tea mingled with a cold glass of water. It changes the temperature to a new value which is different from the exact temperature of both initial fluids.

Therefore, it is well described above.

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in which plant cell is there single number of chloroplast​

Answers

Answer:

The number of chloroplasts per cell varies from one, in unicellular algae, up to 100 in plants like Arabidopsis and wheat.

The example of birds having different shaped beaks illustrates all of the following EXCEPT...
a) A species can adapt in order to vary its diet.
b) Similar species can inhabit the same environment.
c) Animals on land are very different from those in the sea.
d) Adaptation allows species to compete in the same ecosystem.

Answers

Answer:

C

Explanation:

Animals can adapt even if they are from the sea. The rest of the answers are true facts.

Explain the difference between active and latent viruses.

Answers

Answer:Both are viruses that are going to invade and reproduce in a host cell. The difference is that an active virus immediately takes over the cell and a hidden virus stays “hidden” and waits a while to take over.

Explanation:

Which organs are important parts of the immune system?.

Answers

Answer:

Organs and tissues important to the proper functioning of the immune system include the thymus and bone marrow, lymph nodes and vessels, spleen, and skin

Explain why leaving a generous tip at a restaurant one never plans on returning to is considered an altruistic act.

Answers

Leaving a generous tip at a restaurant one never plans on returning to is considered an altruistic act because : Its not for a selfish gain or to buy favor but instead, you are helping the restaurant workers at your own cost.

Meaning of Altruistic act

An altruistic act can be defined as any act of kindness that is displayed by an individual at his own cost or detriment.

An altruistic act can also be said to be an act done for the greater good of others at the expense of oneself or comfort.

In conclusion, Leaving a generous tip at a restaurant one never plans on returning to is considered an altruistic act because : Its not for a selfish gain or to buy favor but instead, you are helping the restaurant workers at your own cost.

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Answer:

Altruism occurs when an individual gives to another out of concern or thought of one's well-being. If an individual has no expectation of returning to a restaurant then leaving a generous tip is considered altruistic because there is no expectation of a reward from the server. If the customer does not return, the server is unable to exchange the gift or tip for good service. Therefore, the customer who tips is giving out of care or concern for the well-being of the server rather than giving with the intention of receiving an external reward.

which is connected to a
Wind turbines use blades that spin a
generator which generates electricity.

Answers

Answer:

Wind turbines use blades to collect the wind's kinetic energy. Wind flows over the blades creating lift (similar to the effect on airplane wings), which causes the blades to turn. The blades are connected to a drive shaft that turns an electric generator, which produces (generates) electricity.

Modern bread wheat is the product of multiple instances of hybridization of wheat species, including wheat found in Middle Eastern farms 10,000 years ago. This is an example of __________.

Answers

The modern bread wheat which is the product of multiple instances of hybridization of wheat species in the question is an example of : Cell division and self fertilization

Similariity between modern wheat and wheat found in middle eastern farms

Modern Wheat used for bread is similar to wheat found in the middle eastern farms 10,000 years ago in that they underwent several hybridization process of wheat species before been used as modern bread wheat. This process is an example of cell division and self fertilization.

Hence we can conclude The modern bread wheat which is the product of multiple instances of hybridization of wheat species in the question is an example of : Cell division and self fertilization

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number of times Jesus healed people who were possessed

Answers

Answer:

37 times Jesus has healed people!

Explanation:

Which organisms are prokaryotes?
archaea
fungi
protists
plants

Answers

Archaea are prokaryotes.

What are prokaryotes?

The simplest form of life on our planet is made up of single celled organisms called prokaryotes that lack any nucleus or membrane bound organelles. Despite their basic structure compared to eukaryotic cells they have extreme significance for our environment as they constitute the majority of life forms on Earth.

Prokaryotes can be broadly divided into two groups: bacteria and archaea. Bacteria outnumbers all other types present globally and flourish across all possible conditions - both regular and adverse including tough terrains like hot springs or acidic lakes; however archaic forms can survive even some brutal conditions such as deep sea zones or within rocks.

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What is the difference between marsupial and placental mammals.

Answers

Answer:

Marsupial animals(including kangaroos) raise its offspring inside a pouch. Placental animals complete development nourished by the placenta.

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The illustration shows an ocean food chain and the concentrations of the toxin DDT at each trophic level. What conclusions can be made as to how DDT impacts this food chain? Include where the concentration of DDT is likely to be lowest, and where it is likely to be highest

Answers

DDT increases as it moves up a food chain.

Explain how?

DDT increases or biomagnifies if we look at a food chain. DDT is fat-soluble, which means animals store it in fatty tissues. It also takes a relatively long amount of time to break down.

Thus, if a predator consumes multiple organisms and each organism has a small amount of DDT, the amount of DDT in the predator is going to be the result of all of those small amounts combined.

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similarities between earth and Jupiter​

Answers

Answer:

they are both circle. They are the part of solar system.

How do bacterial species build antibiotic resistance?

Answers

Explanation:

So when u take antibiotics you kill lots of the bacteria. however you don't kill all of them. the bacteria that is left over hasn't been killed because they are resistant to the antibiotics taken. if left these bacteria will reproduce and build and species resistant to that type of antibiotics which can be incredibly dangerous. this is why it is necessary to finish your full antibiotics course so even if u feel better just to make sure you kill all the bacteria.

Fatty acids are catabolized through which process?.

Answers

This process, called lipolysis, takes place in the cytoplasm. The resulting fatty acids are oxidized by β-oxidation into acetyl CoA, which is used by the Krebs cycle.

Skin is an important part of the immune system. It acts as a ____________ boundary between germs and your body.

Answers

Your answer will be Primary!!


What creates an electric current in
a battery?

Answers

Answer: ELECTRONS JUMPING dont forget to leave a review and a thanks

Explanation:Electrons jumping

2. Inputs to a closed system may be
A. matter only
C. matter and energy
B. energy only D. heat only

Answers

Answer:

B

Explanation:

Please modify the sentence below to make it a TRUE statement.

Strip mining is less harmful to the environment than shaft mining, but more dangerous to miners.

Answers

Strip mining is more harmful to the environment than shaft mining, but less safe to miners.

What are the environmental impacts of mining?

The main impacts of mining are:

environmental water turbidity and increased water pH quality, change in size can be more acidic), soil and water flow with metals, quality to be provided in economic environments.

So in this case, Strip mining is more harmful to the environment than shaft mining, but less safe to miners.

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Why are the
differences so large near the poles?

Answers

Answer:

Sunlight hits a smaller surface area at the Equator so heats up quickly compared to the poles. Explanation:

Why did no one believe Wegner’s Theory of Continental Drift or Plate Tectonic Theory?

Answers

Answer:

Experts firmly believed in another theory (that the continents and oceans were fixed in position), and Wegener did not provide a strong evidence which would enable continents to move in the manner he claimed.

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If cos0=1/4, what is the value seco? Every time he does not feel well, Zander goes to the emergency clinic in his neighborhood. He figures that they will see him any time of day and have good doctors. They always see him, so it must not be a problem. What is the BEST response to Zander?A. It is not the best system, but if he finds it effective it is okay.B. Emergency rooms are really for whoever shows up, so this is okay.C. He should go see a general practitioner unless it is really an emergency.D. Emergency rooms have a lot of highly-trained doctors, so he is getting good care. The ratio of orange juice concentrate to water that Zoe used to make orange juice yesterday was 3 : 7. She used 14 ounces if water in the juice yesterday. Today she wants to make twice as much orange juice.Is the relationship between the amount of orange juice concentrate c and the amount of water w proportional? Explain. Write the quadratic equation in standard form:-3x^2-16=-3x Which elements occupy the same group in the periodic table HELP! I'll give brainliest.2x+6 x+3 Question 1 of 15During the Civil War, both the Union and Confederacy relied on women to:A. serve in high-ranking political positions.B. captain ships in the Atlantic Ocean.C. create new types of battle plans.O D. act as spies in enemy territory.SUBMIT pls helpplspls it's very hard need help on math problem please 6.501 +5.25y + 1850 258) A medicine is effective for 80% of patients. The table shows 30 randomly generated numbers from 0 to 999. Use the table to estimate the probability that the medicine is effective on fewer than two of the next three patients. Let the digits 1 through 8 represent the medicine being effective.463 013 231 898 139365 492 565 188 465438 751 961 646 598045 241 940 901 467151 774 538 380 509251 924 401 549 859 Which us migration trend began soon after world war ii? moving to cities moving to the suburbs moving to the sun belt moving to the northeast "Sea Rose" by H.D.Rose, harsh rose,marred and with stint of petals,meagre flower, thin,sparse of leaf,more preciousthan a wet rosesingle on a stemyou are caught in the drift.Stunted, with small leaf,you are flung on the sand,you are liftedin the crisp sandthat drives in the wind.Can the spice-rosedrip such acrid fragrancehardened in a leaf?Question 7 (1 point) What topic is "Sea Rose" by H.D. mostly concerned about? Question 7 options:A) The idea that "damaged goods" have little to no value.B) What we as a society value as beauty.C) The value of standard roses over the "harsh" sea rose.D) Ideal environments for growing roses. what is one quality you are more likely to find in a speech than in a piece of writing?A. An interactive approachB. High-level languageC. Obvious transitionsD. A repetitive presentation solve this question please Industrialization gave workers shorter working hours and time off on weekends, which allowed for more jobs per person. lower salaries. fewer sick days. more leisure time. What is common to hear when cubanos, dominicanos and puertorriqueos speak Spanish?They don't conjugate verbs.They pronounce the "c" as a "th".They drop the "s" off of many words in Spanish, such as "ests" and "los".They never say the subject pronouns.Pls help me the difference of two numbers is 9 and they are in the ratio 4:7.find The numbers 2. How are surplus and shortage related to equilibrium price?3. Why is equilibrium price represented by the intersection of the supplyand demand curves in a particular market?4. Why do changes in demand or supply cause disequilibrium?5. Why is the market always moving toward equilibrium? in book of economics Divide 350 in the ratio 3:11