which scientist discovered microbes in pond water by using a microscope?

Answers

Answer 1

Answer:

Antonie Philips Van Leeuwenhoek

Explanation:

He created his own microscope to be able to see microscopic organisms. He was able to do this because his job specialized in lenses of various sizes and magnifications. Because of this, he is known as the father of microbiology.


Related Questions

Which would be the order of the bases on the opposite strand of dna

Answers

Explanation:

if one side is A the other would be T

if one side is G the other would be C

A-T

G-C

What hormone increase if low thyroxine level occur

Answers

Answer:

it shows the moderate to high intensity aerobic exercise may help to boost your thyroid hormone levels.it may help to speed your metabolism .

u can read this notes

Answer:

When there is low thyroxine, thyroid stimulating hormone is produced

The cut off part says happening​

Answers

The correct answer is C

Which of these qualities most likely helped Ptolemy construct the scientific explanation of the solar system?
originality and creativity
generosity and helpfulness
consideration and compassion
kind-heartedness and flexibility

Answers

I'm try

Explanation:

originality and creativity im pretty sure

a. ___________________ is the study of heredity.

b. In all living things, ________________ determine the traits and make each creature unique.

c. An organism that has a __________ gene pair will always have two genes for a particular trait.

d. __________________ is considered to be the discoverer of the basis of genetic theory.

e. Hair color and eye color are known as characteristics or inherited ______________________.

f. Dominant genes are _________________ , whereas recessive genes do not always show.

g. _______________ is the transfer of traits from parents to their offspring.

h. A _______________ organism is one that is the offspring of two closely related organisms that are not from the same species.

i. ___________________________- determines what proteins a cell will produce.

j. The _________________________ is a chart used to predict the traits for the offspring from a cross.

Answers

a - genetics
b - genes
c -
d -Gregor Mendel
e - inherited
f -
g- inheritance
h -
I - DNA
J - punnet square
I’ve already done this class I forgot the other answers but I’ll try to figure them out for you and respond again! Hope this helps for now

Answer:

a.Genetics

b. Genes

c. homozygous

d. Gregor Mendel

e. traits

f. genotypes

g. Inheritance

h. hybrid

i. DNA

j. Inheritance

All answers are 100% correct

What was Friedrich Miescher's contribution to the discovery of the genetic code? He created the first photograph of the structure of DNA. He discovered how the DNA bases pair together. He created the first accurate model of DNA's structure. He extracted and observed DNA from white blood cells.

Answers

Answer:

He extracted and observed DNA from white blood cells.

Explanation:

F.Miescher was a  Swiss physician and a Biologist.He was 41 years old.With his experimental processes he was able to isolate many compounds which contains phosphate  from the  nuclei of  white blood cells.He called these chemicals nuclein.(Nuclei acids) This took place in a Felix-Hope seyler's Lab, In Germany.The discovery was in 1869.

Answer:

D on EDG

Explanation:

The Great Pacific Garbage Patch is an area in the north Pacific ocean that contains trash and causes harm to ocean life and those that consume that life. What lessons can be learned from this floating pile of trash?

Answers

Answer:

See the answer below

Explanation:

The lessons that can be learned from this floating pile of trash is that indiscriminate disposal of waste into the environment by humans can eventually come back to haunt them.

What led to the floating pile of trash is the indiscriminate disposal of wastes into the environment. These wastes eventually find their way to the ocean, damaging the aesthetic appearance of the water, poisoning aquatic biodiversity, and eventually poisoning the humans that consume the aquatic foods that make it out of such water alive.

The lessons that can be drawn from this floating pile of trash are that humans' indiscriminate disposal of waste into the environment can come back to them.

What is Pacific Garbage Patch?

A collection of marine debris in the North Pacific Ocean is referred to as The Great Pacific Garbage Patch.

The indiscriminate disposal of wastes into the environment is what resulted in the floating pile of trash.

These wastes eventually make their way to the ocean, where they harm the aesthetic appearance of the water, poison aquatic biodiversity, and eventually poison the humans who consume aquatic foods that survive in such water.

Thus, it can be concluded that the lessons that can be drawn from this floating pile of trash are that humans' indiscriminate disposal of waste into the environment can come back to them.

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Mitosis can be broken down into 4 steps. The way to
remember what happens during metaphase is "middle"
Chromosomes are visable during metaphase. Where
are the chromosomes visible?
А
Outside the cell
B
The equator of the cell​

Answers

It’s B. the equator of the cell

Which class of biomolecule do the molecules in the table belong to? A. proteins B. carbohydrates C. nucleic acids D. lipids

Answers

Answer:I can't see any table but I will tell you everything about protein molecules and the rest.

protein belongs to the table of amino acids .

carbohydrates belong to the table of sugar.

nucleic acids belong to the table of nucleotides.

lipids belong to the table of fatty acids and glycerol.

Explanation:

Protein belongs to the table of amino acids, carbohydrates belong to the table of sugar, nucleic acids belong to the table of nucleotides and lipids belong to the table of fatty acids and glycerol.

Which class of biomolecule do the molecules in the table belong to?

Amino acids combine together to form protein, glucose combine together to form carbohydrates, Nucleotides combine together to form nucleic acids, fatty acids and glycerol combine together to form lipids.

So we can conclude that Protein belongs to the table of amino acids, carbohydrates belong to the table of sugar, nucleic acids belong to the table of nucleotides and lipids belong to the table of fatty acids and glycerol.

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What type of asexual reproduction is shown in the picture above?
O binary fission
Obudding
O regeneration
O vegetative propagation

Answers

binary fission- a single parent cell divides into two daughter cells eg amoeba,paramesium and bacteria

The given image asexual reproduction represents binary fission. The correct option is A.

What is binary fission?

In biology, fission is the division of a single organism into two or more pieces, followed by the regeneration of those parts into new, distinct organisms that resemble the original.

Asexual reproduction by splitting a body into two new bodies is known as binary fission.

When an organism divides into two halves (cytokinesis) through binary fission, it doubles its genetic material, or deoxyribonucleic acid (DNA), with each new creature acquiring one copy of the latter.

Divide into two is what binary fission refers to. It is the most straightforward and typical kind of asexual reproduction.

Thus, the correct option is A as it is showing the splitting of one cell into two.

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¿Qué se entiende por homeostasis?¿Por qué es importante que las condiciones internas permanezcan dentro de un rango constante? ¿Qué ocurre si esto último no se cumple?

Answers

Answer:

La respuestas correctas son descritas en la sección de explicación

Explanation:

Homeostasis se define como un estado de relativa estabilidad dentro del medio interno de un organismo, teniendo composición y propiedades definidas dentro de un rango, las cuales deben ser cumplidas para asegurar el correcto funcionamiento del medio interno. Es precisamente el asegurar el correcto funcionamiento lo que hace importante que las condiciones internas permanezcan dentro de un rango constante. Por ejemplo, si la concentración de iones en la sangre es elevada las células pueden deshidratarse y encogerse hasta morir; o bien si la concentración de iones es baja las células pueden hincharse hasta explotar.

Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.

Answers

Answer:

alveoli are the air sacks present in lungs they constitute the whole surface of the respiratory system the pulmonary artery from the heart containing deoxygenated blood enters the lungs and this deoxygenated blood is then oxidized by alveoli.

Nephron is the basic structural and functional unit of kidney.The function of nephron is removing all waste products including the solid wastes in the form of feaces, and other excess water from the blood, converting blood into the urine, reabsorption, secretion, and excretion of numerous substances.

Explanation:

i hope it will help you

4. What is the symbol for calcium?
А с
B Са
C Cm
D CI

Answers

Answer:

B. Ca

Explanation:

Not rlly anything to explain here

Answer:

The answer is B (Ca)

Explanation:

According to the table of elements

which of the following is a energy consuming process a. excretion b. anabolism c. both a and b d. catabolism​

Answers

Answer:

Anabolism

Explanation:

Excretion exerts energy

Catabolism releases energy

Anabolism requires energy

Answer:

Option B

Explanation:

Anabolism is an energy requiring/consuming process in which smaller molecules are converted into larger molecules.

Almost all weather occurs in the a. troposphere. c. mesosphere. b. stratosphere. d. thermosphere.

Answers

Answer:

The answer is option b.

Hope this helps you.

Answer:

Its A

Explanation:

Edge 2021

The spicules of sponges are made up of caco3 (non living ) but why they have endo skeleton?While endoskeleton is living

Answers

Answer: The spicules of the sponges are made up of calcium carbonate and silica. These structures are present in the body of sponges to provide them support and protection.

The sponges have the endoskeleton in the body which is developed by the specialized cells of the body.

The endoskeleton of the sponges are known as spicules. Actually the outer body of the sponges are very soft and internally has endoskeleton for protection which is a bit hard as it is made of silicon dioxide or calcium carbonate.

What are the intercellular communication types at a synapse? Select all that apply.

a. soups - chemical synaptic transmission

b. sparks - chemical synaptic transmission

c. soups - direct electrical communication

d. sparks - direct electrical communication

Answers

Answer: Option A and D.

Soups chemical synaptic transmission.

Sparks direct electrical transmission.

Explanation:

Intercellular communication refers to the communication and interaction that exists between two cells in the body. It could be hormonal or synaptic transmission.

Synapse is the site where electric nerve impulses are transmitted between two nerve impulses.

There are two synapse possibilities which are electrical and chemical.

The Sparks and soups mean that the scientific discovery over the transmission of nerve impulses as to whether they are electrical impulses (Sparks) or chemical impulses(soup).

Chemical synaptic transmission means there is no physical touch in the space chemical are released and move to the neighbouring cells.

Electrical transmission means neuron physically touch and give way for flow of impulses between cells.

differentiate respiration and photosynthesis aerobic and anaerobic​

Answers

Answer:

respiration is an intracellular oxidation process in which complex organic substances are broken down into simpler sustances with stepwise release of energy.it takes play in all organisms.it is a catabolic process.

photosynthesis is the synthesis of glucose from carbon dioxide in the presence of sunlight and chlorophyll with oxygen as a by-product.it takes place in photosynthetic plants and some bacteria and algae

aerobic respiration takes place in the presence of oxygen it occurs in all organisms CO2 and H2O are by-products it is a major source of energy for most organisms number of ATP produced is 36.

anaerobic respiration takes in the absence of oxygen it occurs in bacteria,yeast and skeletal muscles of human during exercise by-products are lactic acid ethanol and CO2  

Explanation:

i hope this will help you:)

Identify the structures labeled in the diagram.
Label A
Golgi apparatus
mitochondrion
nucleus
DONE

Answers

Answer:

C

Explanation

Got it right on edge

Answer:

label A: nucleus label B: ribosomes

Explanation:

trust me.

Which statement describes one characteristic of index contour lines?
O They appear thinner and lighter than other lines on a map.
They show regions where a difference in elevation exists.
O They show the locations of roads and paths on the landscape.
They show ratios used to determine the actual distance on a map.

Answers

They show regions where a difference in elevation exists.
They appear thicker than other lines usually with a number to annotate then on the height of elevation.

On a topographic map, an index contour line is a darker, or bolder, line that typically appears every fifth line. To help to read the topographic map easier, the particular elevation is written beside these index lines. Thus, option A is correct.

What describes one characteristic of index contour lines?

On a topographic map, a contour line is a line drawn to denote a dip or elevation of the ground. The vertical separation or elevation difference between contour lines is known as a contour interval. Every sixth contour line has an index contour, which is a bolder or thicker line.

Index contour. A contour line that is heavier, darker, and marked with an elevation. A change in elevation is typically indicated every fifth line. This makes it simpler to read the map.

Therefore, They highlight areas where there are elevation differences. They are thicker than other lines and typically have a number to annotate before moving on to the elevation height.

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Sister chromatids separate during
O metaphase
O anaphase
O telophase
O prophase

Answers

Anaphase is the answer. In metaphase the chromatids line up next to each other and the spindle attaches to the centroid. In anaphase, the chromatids are pulled apart into opposing sides of the cell by the spindle fiber

Answer:

metaphase

Explanation:

Metaphase leads to anaphase, during which each chromosome's sister chromatids separate and move to opposite poles of the cell. Enzymatic breakdown of cohesin — which linked the sister chromatids together during prophase — causes this separation to occur.

Which of the following statements shows an example of operant conditioning?

Answers

Answer:

I think it's - A chicken learns that if it pecks on a button, a food pellet will be released into its cage.

The statement "A chicken learns that if it pecks on a button, a food pellet will be released into its cage" shows operant conditioning. So, option A is correct.

Operant conditioning, often known as instrumental conditioning, is a teaching strategy that use rewards and penalties to different behavior. Through operant training, actions that are rewarded are more likely to be repeated than actions that are penalised.

Pavlov's experiment with the dog is an example of classical conditioning, In classical conditioning, the stimulus that is repeatedly combined with the unconditioned stimulus until it finally elicits the same response is known as the conditioned stimulus.

Learning a skill by watching someone else perform it is an example of observational learning. Learning through observation of other people's behaviors is observational learning.

Therefore, option A is correct.

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The complete question is,

Which of the following statements shows an example of operant conditioning?

A.) A chicken learns that if it pecks on a button, a food pellet will be released into its cage.

B.) Pavlov taught a dog to salivate every time it heard a bell.

C.) When you grow up, you are able to perform a skill that you watched your parents perform.

Check all the characteristics below that describe
Compounds

Answers

Answer:

Two or more elements,

Two or more elements,Chemically combined elements,

Two or more elements,Chemically combined elements,More and definite proportions.

Explanation:

A compoundcan be definedas a substance which is composed of two or more elements, that are combined together chemically.

These constituents elements are present in definite proportion and quantities. The composing elements of a compound can be separated only by the means of chemical procedures. A compound is composed of more than one type of atom.

Hence answer could be:

Two or more elements,

Two or more elements,Chemically combined elements,

Two or more elements,Chemically combined elements,More and definite proportions.

The dynamo theory states that earths magnetic field is created in the later known as the

Answers

Answer:

The dynamo theory states that Earth's magnetic field is created in the layer known as the "core".

Answer:

The dynamo theory states that earths magnetic field is created in the later known as the Core

Scientists who study the anatomy of the systems in the human body focus their studies on
only the function of the organ systems in the body.

only the structure of the organ systems in the body.

the function of the organs and organ systems in the body.

the structure of the organs and organ systems in the body.

Answers

Explanation:

Scientists who study the anatomy of the systems in the human body focus their studies on the structure and form of an organism. Particularly, they examine the relationships among parts of the body, as well as the structure of individual organs.

Scientists who study the anatomy of the systems in the human body focus on the structure of the organ and organ systems of the body. So the correct option is D.

What is anatomy?

Anatomy is a field of biological sciences that studies the description of body structure and their identification of living beings. Anatomy also studies the relationship of these structures with one another.

Gross anatomy is referred to the major body sections in a narrow sense after dissection. The body structures studied under gross anatomy are simply those that are big enough so that their observation does not need any kind of magnifying device.

Microscopic anatomy is the study of structures which can only be observed with the help of a microscope.

In all kinds of anatomical research, dissection is necessary because it's not really possible to study internal structures without opening them. The earliest record of the study of anatomy is from the Greeks, in fact, the word anatomy is derived from the Greek word ana temnein which means to cut-open.

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need help with this question. (Explain Ali's observation)​

Answers

Answer:

Bubbles in the water is the air that was displaced by water and leaving the surface of water

L Pretest Unit 4
than this trilobite fossil?
12
11
10
8
7
6
2
-
PARLA
A 18
B. 4​

Answers

Answer:

b

Explanation:

In the given image, the part which correctly describes trilobite fossil is 4. The correct option is B.

What is Trilobite fossil?

Arthropods called trilobites are extinct. Rarely is a full fossil recovered; most often, only the skeleton occurs. A flexible, jointed thorax separated the head (cephalon) and tail (pygidium), which covered the upper part of the body.

Trilobite fossils are an essential part of Unit 4's pretest, as they provide valuable information about the history and evolution of life on Earth. When studying these ancient creatures, you'll be able to understand their anatomy, behavior, and the environments they lived in millions of years ago.

By examining trilobite fossils, you'll gain important insights into the geological time scale, the process of fossilization, and the significance of paleontology in scientific research.

Therefore, the correct option is B.

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Which statement best supports the argument that
eating whole grains is good for you?
A On the other hand, vegetables such as
spinach, broccoli, and peppers are non-
starchy and can be great to eat.
B Limiting sugar in the blood is important
because too much sugar can cause
obesity and other diseases, such as
diabetes.
C A carbohydrate that takes longer to
break down in the body puts less sugar
into your bloodstream.
D Of course, exercise helps the body work
off calories and sugar that you might
get from eating too many
carbohydrates.

Answers

Answer:

C) a carbohydrate that takes longer to break down in the body puts less sugar into your bloodstream

Explanation:

Whole grains are a more complex carbohydrate than your basic white bread, meaning it takes longer to break down and doesn't flood your bloodstream with sugar the way white bread does when eaten. (also, the other three are not very closely related to/answer the question)

The type of cereals that consists of bran, germ and endosperm is called whole grains. It reduces the risks of many illnesses and deficiencies. Examples of whole-grain are millet, oatmeal, brown rice etc.

The statement that supports the argument is:

Option C.  A carbohydrate that takes longer to break down in the body puts less sugar into your bloodstream.

The statement can be explained as:

The vegetables like broccoli, spinach, peppers etc. are a very good source of non-starchy food and rich in minerals and vitamins.

Too much blood sugar is the reason for obesity and diabetes that results in adverse health complications.

Too much fat and carbohydrates in food can be burned by exercising and workouts.

Thus, carbohydrates take a longer time to break in the body.

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A roller coaster track is 3000 meter long. It takes 100 second to travel once around the roller coaster. What is the average speed of the roller coaster? Remember:speed can be measured by dividing the distance by time Speed =distance /time

Answers

Answer:

30meter per second

Explanation:

Given that

Distance = 3000 meters

Time = 100seconds

Speed = distance /time

Substituting the values

Speed = 3000/100

Speed = 30meter per second

The average speed needed to cover the travelling will be 30meter per second.

Answer:

The average speed needed to cover the travelling will be 30meter per second.

Explanation:

ture or false a major christian doctrine is the resurrection of jesus christ

Answers

Answer:

True

Explanation:

The Christian doctrine is built upon the resurrection. Without it, Christianity would pretty much fall apart.

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Which music is performed before and during a play, setting the mood for the drama? A. Program Symphony B. Concert Overture C. Symphonic poem D. Incidental music E. Art song Consider the half reaction below.Cu + (aq) + 2eCuis)Which statement best describes what is taking place? Which expression is equivalent to 3 times 5 times 5 times 5 times 5 times 5 times 5? The sum of three numbers is 142 the second number is for more than two times the first the third number is triple the first number find the largest number What types of cash crops have been genetically modified NEED HELP ASAP!!! A family of 3 children and 2 adults visited a health club. The club charges $y an hour for each child and $x an hour for each adult. If the family does not want to spend more than $30 an hour at the health club, which of the following graphs best models the situation? a. Line joining ordered pairs 0, 10 and 15, 0. Shade the portion of the graph below this line which lies within the first quadrant b. Line joining ordered pairs 0, 10 and 15, 0. Shade the portion of the graph above this line which lies within the first quadrant c. Line joining ordered pairs 0, 15 and 10, 0. Shade the portion of the graph below this line which lies within the first quadrant d. Line joining ordered pairs 0, 15 and 10, 0. Shade the portion of the graph above this line which lies within the first quadrant A sample of bismuth weighing 0.687 g was converted to bismuth chloride by reacting it first with HNO3, and then with HCl, followed by careful evaporation to dryness. The mass of the bismuth chloride obtained was 1.032 g. What is its empirical formula I need help with this so could you give me the answers with an explanation if you can. How does the IPPC help government to decide what to do about global warming? HELLO THERE. PLS HELP ME WITH MY GEOMETRY A bag contains seven green marbles and nine yellow marbles. You randomly select three marbles. What is the probability that all three marbles are green when (a) you replace each marble before selecting the next marble, and (b) you do not replace each marble before selecting the next marble? Write each probability as a decimal rounded to the nearest thousandth. Then compare the probabilities. State the domain of f(a,b) = e^ab If significantly less then 25.00 mL of acid were added to the flash in step 7 of the procedure, what affect would this have on the accuracy of the sodium hydroxide concentration? Explain your answer How do you obtain credit A survey was conducted among people who visit swimming pools. 209 people were asked about the preferences in water sanitizing. 112 respondents reported they prefer pools with mechanical methods of water sanitizing, and 97 respondents reported they do not have any preferences. Construct a test for a difference in proportions for this survey to find out if the proportion of people who prefer mechanical methods of water sanitizing truly exceeds the proportion of people who have no sanitizing methods preferences, if it is possible. A : An Ideal gas is being heated in a circular duct as while flowing over an electric heater of 130 kW. The diameter of duct is 500 mm. The gas enters the heating section of the duct at 100 kPa and 27 deg C with a volume flow rate of 15 m3/s. If heat is lost from the gas in the duct to the surroundings at a rate of 80 kW, Calculate the exit temperature of the gas in deg C. (Assume constant pressure, ideal gas, negligible change in kinetic and potential energies and constant specific heat; Cp =1000 J/kg K; R = 500 J/kg K) psychologist is interested in constructing a 95% confidence interval for the proportion of people who accept the theory that a person's spirit is no more than the complicated network of neurons in the brain. 68 of the 945 randomly selected people who were surveyed agreed with this theory.Round your answers to two decimal places.A. With 95% confidence the proportion of all people who accept the theory that a person's spirit is no more than the complicated network of neurons in the brain is between _____ and _____.B. If many groups of 945 randomly selected people are surveyed, then a different confidence interval would be produced from each group. About_____ percent of these confidence intervals will contain the true population proportion of all people who accept the theory that a person's spirit is no more than the complicated network of neurons in the brain and about_____ percent will not contain the true population proportion. Here is a train table: Newport: 04:58. 13:32 Shrewsbury: 07:22 A) How long is the journey from Newport to Shrewsbury if you catch the 04:58 train? B) The 13:32 train from Newport takes 2 hours and 29 minutes to get to Shrewsbury. What is the missing time? How do property rights benefit entrepreneurs? PLZZZ ANSWERRR!!! Professional cameras have lenses that can be switched out, allowing the photographer to _____. A. convert the camera into a telescope B. change the appearance of the photo C. take pictures just like a disposable camera D. throw away lenses that have been used up