what is the device used to observe cells ?

Answers

Answer 1

Answer:

Microscope

Explanation:

A microscope is an instrument that can be used to observe small objects, such as cells. The image of an object is magnified through at least one lens in the microscope.

Answer 2

Question

What is the device used to observe cells?

Answer

Microscopes

What is Microscopes?

Microscope is an instrumet or device that can be used to observe small object , even cells or smal organisms.

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Related Questions


Which three statements are true about the energy flow in an ecosystem?

Answers

Answer:

main source of energy for an ecosystem is the sun producers convert radiant energy to chemical energy the maximum amount of biomass is at the lowest trophic level

Answer:

A,B and E

Explanation: hope it helps you :)

What is respiration and the types of respiration​

Answers

Answer:

Hey mate......

Explanation:

This is ur answer.....

Respiration is the process by taking in oxygen and liberating carbon dioxide from the oxidation of complex organic substances.

Three types of respiration include internal, external, and cellular respiration. External respiration is the breathing process. It involves inhalation and exhalation of gases. Internal respiration involves gas exchange between the blood and body cells....

Hope it helps!

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Which of the following are the main components of an mRNA vaccine?
mRNA and B-Cells that recognize the coronavirus
mRNA and antibodies that can inactivate the coronavirus
mRNA and spike proteins from the coronavirus
mRNA only

Answers

I'm not an expert so take this with a grain of salt, but I'd say mRNA and spoke proteins

assume that cody used a weak magnet and the flake of cereal was not attracted to it what conclusion might he have drawn?​

Answers

Answer:   he might have concluded that the flake of cereal was not magnetic

Explanation:

How does polyploidy allow speciation to occur in a single generation? Polyploid offspring produce gametes earlier in the mating season than than their diploid parents, causing reproductive isolation between the two generations. Polyploid offspring produce smaller gametes that disperse farther than the gametes of diploid parents, causing geographic isolation between the two generations. Physiological differences between polyploid offspring and their diploid parents allow them to thrive in different environments, causing geographic isolation between the two generations. Genomic differences between polyploid offspring and their diploid parents prevent them from successfully interbreeding, causing reproductive isolation between the two generations.

Answers

Answer:

Genomic differences between polyploid offspring and their diploid parents prevent them from successfully interbreeding, causing reproductive isolation between the two generations.

Explanation:

Speciation is an ecological and biological process through which new species are formed due to isolation.

In plants, polypoidy involves the possession of two complete sets of chromosomes and it leads to the origin of new species. Also, the two sets of chromosomes comprises of triploidy (69 chromosomes) and tetraploidy (92 chromosomes).

As a result of the genomic differences between polyploid offspring and their diploid parents, this usually prevent them from successfully interbreeding and consequently causing reproductive isolation between the two generations.

For every action or force
in nature, there is an equal
and opposite reaction.

Answers

Answer:

Newton's Third Law of Motion

Explanation:

Newton's third law of motion states that any object that has a force applied to will react in the opposite direction

Hope It Helps you!!

Mitosis makes.....
A. cell phones

B. identical body cells

C. sperm and egg cells

Answers

B. identical body cells

hope it is helpful to you

Answer:

B. identical body cells

Explanation:

Mitosis produces new cells, and replaces cells that are old, lost or damaged. In mitosis a cell divides to form two identical daughter cells. ... Mitosis separates these chromatids, so that each new cell has a copy of every chromosome.

Indicate whether the statement is true or false.
This is Ag work please answer correctly

____ 1. Plants are used directly and indirectly to meet human needs

____ 2. A steer is a female cow that has given birth

____ 3. You have to live on a farm to be an FFA member

____ 4. We believe are the first two words of the FFA creed

____ 5. Thank you notes are required to get a job


____ 6. Only female turkeys gobble

____ 7. A first year FFA member is called a Greenman

____ 8. To be in FFA you have to be in an Agriculture class

____ 9. It is okay to let a non FFA member wear your FFA jacket

____ 10. You have to be in FFA to have an animal project

____ 11. It is okay to leave blanks on a job application

____ 12. A male turkey is called a Tom

____ 13. While in FFA official dress it is acceptable for makes to wear khaki pants

____ 14. A cow is a ruminant animal

____ 15. Cows have only one stomach compartment

____ 16. Turkeys grow to full maturity in about 4 to 5 months

____ 17. The FFA is only in the state of Texas

____ 18. The FFA emblem plow stands for labor and tillage of the soil

____ 19. There are 3 paragraphs in the FFA creed

____ 20. A turkey under sixteen weeks of age is called a roaster

____ 21. Wild turkeys are white in color

____ 22. Freeze branding is the only way to identify cattle

____ 23. A job application is one of the first barriers that you encounter before you are employed

____ 24. The gestation period of cattle is only 3 months

____ 25. Domesticated turkeys cannot fly

____ 26. A T-bone steak is considered a by- product

____ 27. The official colors of the National FFA are blue and gold

Multiple Choice
Identify the choice that best completes the statement or answers the question.

____ 28. Which act established vocational agriculture courses in 1917?



____ 29. What did FFA stand for before it was changed?




____ 30. The official colors of the FFA are


























____ 31. How should the FFA jacket be worn?


































____ 32. List the parts of the FFA emblem




____ 33. Plants impact what environmental factors?








____ 34. When measuring a horse 1 hand= _____ inches





____ 35. Who wrote the FFA creed?








































____ 36. What provides the foundation of the FFA emblem?
































____ 37. The FFA emblem has how many symbols?





























____ 38. The highest FFA degree members can earn is…



____ 39. The first line of the FFA motto is

















____ 40. List the official Dress for females


























































____ 41. What are the last few words of the first paragraph of the FFA creed










































____ 42. In ___________ the FFA opened membership to girls




____ 43. ______ believe in less dependence on ________ and more power in bargaining




____ 44. The Symbol on the FFA Emblem that signifies Labor and tillage of the soil is





____ 45. What does polled mean?





____ 46. breeds of cattle are known for milk production




____ 47. What do you call a neutered male cow?



____ 48. What do you call a male sheep or goat that has been castrated when its young?



____49. Swine breed most used for pets




____ 50. The most popular goat breed used for FFA projects

Answers

Answer:

1True

Explanation:

Because plants and animals are in various relation. example Food air and e.c.t.

How does bacteria cause disease?

Answers

Answer:

Bacteria cause disease by secreting or excreting toxins (as in botulism), by producing toxins internally, which are released when the bacteria disintegrate (as in typhoid), or by inducing sensitivity to their antigenic properties (as in tuberculosis).

btw :

stay safe! :3

PLEASE HELP! WILL MARK BRANLIEST!
The amount of carbon today is the exact amount that has always been on Earth. T or F

Answers

Uhmmmm that’s definitely false.

What causes the formation of a cervical plug a testorone b progesterone c luteal d estroge e follicle

Answers

Answer:

b progesterone

Explanation:

The plug is formed as soon as there is implantation of fertilized eggs. The thickness of the cervical mucus becomes different as hormone levels changes in pregnancy.  

The progesterone, encourages the production of thick fluid/ mucus  which brings about the formation of a plug. This prevents bacteria from getting into the uterine cavity.

Answer: The correct option is B (progesterone).

Explanation:

The cervix is the ring of muscles also called the neck of the uterus in female reproductive system. This protrudes through the anterior wall of the vagina, opening into it at the external os.

After the fertilization of the ovum by the spermatozoa, the uterus prepares for the implantation which results from the secretion of hormones. Under the influence of oetrogen, secreted by the developing follicle, the cells of the endometrium divide rapidly causing the endometrium to build up and thicken.

While the viscosity of cervical mucus changes in response to hormone levels and during pregnancy, progesterone fosters the production of highly viscous mucus resulting in the formation of a plug that forms a physical barrier to bacteria and prevents their ascension into the uterine cavity. This plug is called CERVICAL PLUG.

Which of the following processes transfers carbon directly from sea water to sea plants

Answers

I don’t see the “following” that ur talking abt but it is diffusion

5. Our nervous system and our skeletomuscular system help us react to stimuli. Give one example on how this helps us maintain homeostasis.

Answers

Answer

The nervous and skeletomuscular systems help maintain homostasis by regulating respiration.

Explanation:

The brain stem, consisting of the pons and medulla, represent the main respiratory center.   According to Wikipedia, "an increased level of carbon dioxide in the blood, or a decreased level of oxygen, will result in a deeper breathing pattern and increased respiratory rate to bring the blood gases back to equilibrium."

This is an example of a homostastic response controlled by both of the organ systems referenced above.

Source: https://en.wikipedia.org/wiki/Homeostasis

What is the most significant challenge for organisms that live in estuaries?
O A. Changing nutrient levels
O B. Changing water temperatures
O C. Changing water depth
O D. Changing water salinity
SUBMIT
(FOR TEST HELPPPP N HURRYYYY PLEASE!!!)

Answers

Answer:

D

Explanation:

sorry replied late buh it's better to know for the future l guess

Which of the following characteristics of life apply to bacteria?
A)They evolve
B)They reproduce
C)They use energy
D)All of the above

Answers

Answer:

All of them above

hope it helps

Answer:

It should be D

All of the above

A scientist is studying a cell from an unidentified organism. Which of these observations of the cell provide evidence for classifying the cell as PROKARYOTIC and NOT EUKARYOTIC? Select all that apply
The cell has a cell wall.

The cell lacks mitochondria, chloroplasts, and other membrane-bound organelles.

The cell has a cell membrane.

The cell has ribosomes in its cytoplasm.

The cell lacks a nucleus.

Answers

Answer:

hfdjjjjjjhgjluhb

Explanation:

Dados los elementos Ca y Cl
a) Escribir la CE (Configuración electrónica)
b) ¿Cuál de estos átomos tiende a perder electrones y cuál a ganarlos? ¿Cuál formará aniones y cual cationes?
c) Escribir la estructura de Lewis para la sustancia iónica cloruro de calcio (CaCl2).

Answers

Answer: The answer is c

Which statement best describes Earth's human carrying capacity?

A: It is a fixed number that we will soon exceed.

B: It is increasing due to improved technology and medicine.

C: It is decreasing due to increasing population.

D: It is decreasing due to decreasing death rates.

Answers

B: it is increasing due to improved technology and medicine

The statement that best describes Earth's human carrying capacity that it is increasing due to improved technology and medicine. The correct option is B.

What is carrying capacity?

Carrying capacity is the amount of persons the individual may experience over a lengthy amount of time and density affects the overall population.

Food, habitat, moisture as well as other necessities found in the environment determine carrying capacity.

Carrying capacity is defined as the average population size of a species in a given habitat.

Environmental factors such as adequate food, shelter, water, and mates limit the species population size. If these needs are not met, the population will decrease until the resource rebounds.

The best description of Earth's human carrying capacity is that it is increasing as a result of improved technology and medicine.

Carrying capacity is defined as the maximum number of individuals of a population that the environment can support.

Thus, the correct option is B.

For more details regarding carrying capacity, visit:

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Explain the advantage of an increase in the number of mitochondria in slow twitch fibres. Include at least 2 points in your response

Answers

Answer:

To produce more ATP molecules.

Explanation:

The advantage of an increase in the number of mitochondria in slow twitch fibers is to provide more ATP is provided to the muscles. These large number of mitochondria is responsible for the production of large amount of ATP which is a fuel that is used by the muscles of the boy in order to continue working. There is high burden on the slow twitch fibres in order to continue its movement, more mitochondria is needed.

Can someone help me?

Answers

Answer:

1. lytic/losigenic cycle

2. Restriction enzymes (breaks) and DNA ligase (joins)

3.mitosis (creation of twin daughter cells)

4. mitosis had helped humans with cell growth and repais (and keeps a steady supply of new cells)

Explanation:

it first goes through the lytic cycle where one bacterium inserts it's own dna into a host (human cell) and into the human DNA and it starts multiplying inside human cells in the lysogenic cycle

Anthropologist: In an experiment, two groups of undergraduates were taught how to create one of the types of stone tools that the Neanderthals made in prehistoric times. One group was taught using both demonstrations and elaborate verbal explanations, whereas the other group learned by silent example alone. The two groups showed a significant difference neither in the speed with which they acquired the toolmaking skills nor in the level of proficiency they reached. This shows that Neanderthals could just as well have created their sophisticated tools even if they had no language
Which one of the following, if true, most weakens the anthropologist's argument?
(A) Apart from the sophistication of their stone tools, there is a great deal of evidence suggesting that Neanderthals possessed some form of language.
(B) The students who were taught with verbal explanations were allowed to discuss the toolmaking techniques among themselves, whereas the students who learned by silent example were not.
(C) The tools that the undergraduates were taught to make were much simpler and easier to make than most types of tools created by Neanderthals.
(D) The instructor who taught the group of students who learned by silent example alone was much less proficient at making the stone tools than was the instructor who taught the other group of students.
(E) The tools created by Neanderthals were much less sophisticated than the tools created by anatomically modem humans who almost certainly possessed language and lived at the same time as the Neanderthals.

Answers

Answer:

A

Explanation:

The point of this arguement is that with or without speaking they were able to make the same sophisticated and complex tools, if it is true that both had a language that would mean the silent people would have no point and that both types of humans had the same initial factors.

Because the imaginary axis of the earth is inclined to the sun at the equator, the northern and southern hemispheres shine in different ways. When it is summer in the northern hemisphere of our planet, then it is winter in the southern hemisphere

Answers

Answer:

Yes.

Explanation:

Yes, when it is summer in the northern hemisphere of earth, then it is winter in the southern hemisphere. This change of season occur due to tilting of earth. The season of northern hemisphere and southern hemisphere are different and opposite to each other because both are present at opposite location on the earth surface. The tilting region experience winter season whereas the other regions experience summer due to direct sunlight.

Would you predict more earthquakes in areas where tectonic plates are colliding or where they are moving apart?
PLSS HELPP MEEE

Answers

Answer:

Maybe where they are colliding because when they collide there is going to be a wave of impact that will go to the surface

Explanation:

In which ocean's zone would you expect to see the
ecosystem shown?
the open ocean
the intertidal zone
the benthic zone
the neritic zone
zone?

Answers

Answer:

La zona intermareal

Explanation:

Por que en la información del texto

Answer:

Intertidal zone

Explanation:

I took the assigment :)

Genetically modified organisms include microbes used in biotechnology that possess enzymes promoting antibiotic resistance. This could be a problem given the rise of antibiotic-resistant organisms. However, these engineered microorganisms do not pose a risk to public health. What do you think prevents them from spreading antibiotic resistance to pathogens outside the laboratory

Answers

Answer:

What prevents these microorganisms from spreading resistance outside the laboratory is that they are modified to not survive outside the laboratory environment.

Explanation:

Antibiotic resistant microorganisms are very dangerous and unfavorable, as they leave living beings completely completely defenseless to their attacks. However, there are microorganisms that have been modified in the laboratory, as shown in the question above, and do not present any risk to living beings, even if they develop resistance. This is because the modification that these microorganisms received makes them not survive the environmental conditions outside the laboratory, which causes them to die if they leave the laboratory.

The tube in the penis where sperm exits is

Answers

Answer:

The vas deferens transports mature sperm to the urethra in preparation for ejaculation.

Answer:   testes

Explanation:

Sperms are made in testes.

the unaided eye perceive stars of the _______ magnitude

Answers

Answer:

sixth

Explanation:

yeah that's the answer but It said to explain so I'm jus telling u

What does stage 4 show?
A. A young female cone with fertilized eggs matures into a seed
cone.
B. A spore divides and grows into a pollen grain using mitosis.
C. Young male cones produce spores using meiosis.
D. A seed that contains an embryo plant grows into a young pine
tree.

Answers

Answer:

A.

Explanation:

It looks like the pine cone looks like is turning into a normal cone. That is why.

Answer: A. it looks as if its matured from being a young cone

The energy required to get a reaction started is called activation energy.
]
True
False

Answers

Answer:true

Explanation:

As native mason bees visit flowers, they spread pollen while also consuming nectar from the plant. This is an example of symbiosis.
true or fasle

Answers

Answer:

True

Explanation:

Symbiosis is a type of relationship or interaction between two different biological organisms/species by which both are benefited. The bees such as mason bees are pollinators. Pollinators are animals (especially insects) that help the development of seeds and the fruit surrounding seeds by the pollination of flowers, i.e., by the transference of pollen from male anthers of a flower to the female stigma. During this process, pollinators eat nectar, which is a sweet energy-rich liquid secreted by flowers. In consequence, both species (i.e., plants and mason bees) are benefited from this interaction.

Other Questions
If you apply the changes below to the reciprocal parent function, F(x) =what is the equation of the new function? Horizontally stretch by multiplying by 1/6 Translate 5 units right. The wallpaper in the "The Yellow Wallpaper" by Charlotte Perkins Gilman symbolizes in the story. For years, Luke has had the idea of making his own business. As Luke will realize, he will face three basic economic questions. What are these questions?a. When, How, For whomb. Who, when, whyc. What, How, for whomd. What, When, How Aha I'm failing so if you could help that would be great :D. Find the value of x in the triangle shown below. Find the approximate surface-area-to-volume ratio of a bowling ball with a radius of 5 inches.A 0.6B. 0.67C. 1.67D. 25 Which sentence best describes how the setting contributes to the theme of appearance versus reality? 1. The deserted anteroom, which separates Madame Loisel from her husband, shows how women often felt intentionally isolated from men. 02. The cold air, which causes Madame Loisel to shiver, emphasizes how the simple act of borrowing clothing and jewelry can improve social status. 3. The humble flat, which contains a mirror in which Madame Loisel seeks comfort, reveals her plan to use beauty and deceit to improve her reputation. 4. The shabby cab, which returns Madame Loisel home, suggests that she will never fulfill her aspiration to be embraced by the wealthy on a modest income. Which type of modeling can create virtual designs that can save clients thousands of dollars?sketch modelsprototypesindustrial programscomputer programs Help please please please Two trains leave a train station at the same time. One travels north at 12 miles per hour. The other train travels south at 9 miles per hour. Inhow many hours will the two trains be 88.2 miles apart?O 4.7 hoursO 4.2 hoursO 2.1 hoursO 8.4 hours 225 ft281 ft2Three squares are joined below at their vertices to form a right triangle. Find X, the sidelength of the square marked in the diagram.12 feet144 feet48 feet17.5 feet Calculate the heat energy conducted per hour through the side walls of a cylindrical steelboiler of 1.00 m diameter and 3.0 m long if the internal and external temperatures of thewalls are 140 C and 40 C respectively and the thickness of the walls is 6.0 mm. (Thermalconductivity of steel, k = 42 Wm-4C-4) Completa el espacio en blanco con la forma correcta del verbo en el tiempo futuro.Juan y Katalina ________ en el partido maana. (jugar)jugarjugarnjugnjuegarn What impact did the renaissance have on European society please helpppp... thank u outline three effects of international migration on the host country necesito blank que hare manana What would the judge and jury most likely think afterhearing this dialogue?u were, canere you were?hen theSteve may be dishonest because he is accusing thedetectives of working slowly.Steve may be honest because people could easilyforget where they were weeks earlier.Steve may be deceitful because he seems to beavoiding Petrocelli's questioning,Steve may be trustworthy because he is repeatingthe same thing that he told the detectives earlier.aldn't evenout. They didn't Identify the definition of the hydrological cycle. .A an open system made up of stores and transfersB a closed system made up of only stores C a closed system made up of stores and transfers D an open system made up of only transfers after hunter drank a glass of milk sugar levels in the blood increased. The stimulated the hormones insulin to be released. Insulin helped the sugar move from his blood into cells, so his blood sugar levels decreased. Which statement explains what happen next Can someone help with this?