when did anton van leeuwenhoek invent the microscope

Answers

Answer 1

Answer:

1666

Explanation:


Related Questions

Cơ thể người không tiêu hóa được loại đường nào?

Answers

Answer:

Cơ thể người không tiêu hóa được loại đường nào? Cơ thể người không tiêu hóa được Xenlulozo.

A team of deep-sea divers and biologists is exploring the open ocean. As team members dive downward from the surface, they observe significant changes to the ocean community at a depth of about 200 meters. What is the main cause of the changes at this depth?

A. loss of brightness of the water
B. increasing salinity of the water
C. increasing temperature of the water
D. decreased oxygen concentration of water

Answers

Answer:

A

Explanation:

sunlight is the main change. sun light cannot penetrate into the deep layers of the ocean and availability of oxygen is also low there. this causes the considerable amount of organisms to live in the upper layers of the ocean and we can only observe decomposing organisms in the deeper layers!

If you were on Earth at 60° N and looked directly up around noon, what would you see?

Answers

Answer:

You would experience 24 hours of it being night or darkness

Explanation:

it is more than 90 degrees away from the suns vertical ray

Hope this Helps

if a cell has 24 chromosomes, how many chromosomes would each of its four daughter cells have after meiosis?

Answers

Answer:

Because there are two rounds of division without duplication in between, the genetic content is cut in half. Each of the 4 daughter cells will only end up with half of the genetic content of the parent cell. Therefore, after meiosis, the daughter cells would have only 12 chromosomes each.

whitch statment best compares and contrasts lipids and carbohydrates?

Answers

Answer:

The key difference between carbohydrates and lipids is that the carbohydrates are immediate energy sources in living organisms while the lipids act as a long-term energy resource and tend to be utilized at a slower rate. Carbohydrates and lipids are important nutrients in living organisms.

Explanation:

Does galena occur naturally

Answers

Answer:

Galena, also called lead glance, is the natural mineral form of lead(II) sulfide (PbS). It is the most important ore of lead and an important source of silver. ... It is often associated with the minerals sphalerite, calcite and fluorite.

Explanation:

Hope this helps

How are all living cells organized?

Answers

Answer:

Taxonomy

Explanation:

The cell is the most basic unit of life. Similar cells together form tissues. Similar tissues together form organs. Organs work together in organ systems. Organ systems form complex organisms. Because living things are diverse, taxonomy was created to group organisms into categories and to understand their evolutionary relationships.

Hope this helps :}

Pls mark brainliest :p

And have an amazing day <3

Answer:The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.

Explanation:Cells are divided into several compartments, each with a characteristic structure, biochemical composition, and function.

These compartments are called organelles. They are delimited by membranes composed of phospholipid bilayers and a number of proteins specialized for each type of organelle.

All eukaryotic cells have a nucleus surrounded by a nuclear envelope, and a plasma membrane that borders the whole cell.

Most eukaryotic cells also have endoplasmic reticulum, a Golgi apparatus, lysosomes, mitochondria, and peroxisomes.

What happens to solid particles as they are heated?

Answers

Explanation:

When a solid is heated the particles gain energy and start to vibrate faster and faster. ... Further heating provides more energy until the particles start to break free of the structure. Although the particles are still loosely connected they are able to move around. At this point the solid is melting to form a liquid.

they vibrate when they are next to something they jump do it untill its really hot and it mealts

The Salmonella bacteria infect human, when eating contaminated food or water, causing some symptoms as diarrhea. Which part of the alimentary canal is most affected ? A) Mouth B) Intestine C) Oesophagus D) Pharynx ​

Answers

Answer:

B. Intestine

Explanation:

Salmonella bacteria live in the intestines of people, animals and birds. Most people are infected with salmonella by eating foods that have been contaminated by feces. Commonly infected foods include: Raw meat, poultry and seafood.

When is the gravity exerted on Earth by the Sun and Moon system the greatest? Why do you say this?

Answers

Answer:

When the Moon is positioned between the Sun and the Earth.

Explanation:

This is because you add both the gravitational pull of the Moon, with the gravitational pull of the sun.

What is the smallest family in the phylum Aves?

Answers

The smallest family in the phylum Aves is the bird family.

What is Phylum?

Phylum may be defined as a prevalent taxonomic classification that classifies above class and below kingdom, identical to the division in botany.

The phylum Aves are generally adapted to fly. Hence, it consists of birds or organisms who have the ability to fly in the environment and are classified into this category with a lot of exceptions like bats which belong to mammals.

Therefore, the smallest family in the phylum Aves is the bird family.

To learn more about Phylum classification, refer to the link:

https://brainly.com/question/167569

#SPJ1

why are cells growing on top of each other even if they have space in culture flask

Answers

Answer:in culture plates cell density of the edges is often more than the center of the dish,

what causes this distribution?

Explanation:

Which of the following organisms are prokaryotes?
a
plants
b
animals
c
bacteria
d
fungi

Answers

Answer: C. Bacteria (prokaryotes are bacteria)

2. Write the molecular formula of following Magnesium Chloride, Sodium chloride, potassium nitrate, hydrogen oxide ​

Answers

Explanation:

Magnesium Chloride : MgCl2

Sodium chloride : NaCl

Potassium nitrate : KNO3

Hydrogen oxide : H2O2.

hope this helps you.

Does hermatite occur naturally

Answers

Answer:

I would say yes.

Explanation:

Hematite is found as a primary mineral and as an alteration product in igneous, metamorphic, and sedimentary rocks. It can also form during contact metamorphism when hot magmas react with adjacent rocks. The most important hematite deposits formed in sedimentary environments.

I hope I'm correct

Answer:

Hematite is found as a primary mineral. it is naturally formed in sedimentary environments.

Gypsum is a naturally occurring stone, a metallic salt of calcium. It commonly forms as an evaporite from the dissolution of limestone by exposure to sulphuric acid from volcanic activity

So the answer is YES

PLEASE HELP

which of the following should be a characteristic of a stable ecosystem

a. an increase in human interference

b. an obundance of biodiversity

c. a high number of predators and a lesser number if producers

d. a lack of interdependence of organisms

Answers

Answer:

b. an obundance of biodiversity

3. Which of the following resembles a hypothesis?
Joe witnesses a shooting star and makes a wish.
Shen wonders how shooting stars form in outer space.
Rodney claims that shooting stars burn from entering Earth's atmosphere.
Jane researches how much friction causes combustion.

Answers

Answer:

Rodney claims that shooting stars burn from entering Earth's atmosphere.

Answer:

Rodney claims that shooting stars burn from entering earths atmosphere

Explanation:

fluid-filled sacs that cushion synovial joints are called

Answers

Answer:

They are called bursea

Explanation:

Explain how the structure of an enzyme can affect its function.

Answers

Explanation:

i hope the answer will help you !

Which of these is a biotic factor?
topography
soil
air
bactiria

Answers

Soil and air because it is needed for the development of living beings

In bakery when _______ is added to the dough for preparing bread, the dough rises f

Answers

Answer:

it is Yeast, yeast makes it rise

the packaging and distribution center of the cell is the

Answers

Answer:

golgi apparatus

Explanation:

please help me nowwwwwwwwww it is not D

Which of the following best describes sickle-cell anemia?

A) Caused by environmental factors that an individual was exposed to during pregnancy.
B) A hereditary genetic mutation that causes a resistance to malaria.
C) An inherited disorder that increases the risk of contracting malaria from mosquitos.
D) A genetic mutation that is inherited from a dominant allele of one parent.

Answers

Answer:

A.

Explanation:

This is when a female reproduces alone

Answer:

Sickle cell anemia is one of a group of disorders known as sickle cell disease. Sickle cell anemia is an inherited red blood cell disorder in which there aren't enough healthy red blood cells to carry oxygen throughout your body. Normally, the flexible, round red blood cells move easily through blood vessels.

Explanation:

Based on "Sickle cell anemia is an inherited red blood cell disorder" taken from the text, I would say the correct answer is C, because it says "an inherited disorder" and describes Sickle cell anemia.

Hope this helps! :D

1. State one possible negative effect of a warming trend on Earth. Specify how this effect will
have a negative impact on the living environment.

Answers

Answer:

One stated possible negative effect of a warming trend on earth is that the polar ice caps could melt.

Explanation:

Specification on how this will have a negative impact on the living environment is that it will cause sea levels to rise this is negative because: tsunamis will become more severe and damaging to land. Rain storms will have severe floods then what we have now.

Hope this helps.    

justify the statement conservation of forest helps in the protection of environment​

Answers

Answer:

conservation of forests helps in protection of environment as forests gives food fodder and shelter to animals

Explanation:

The importance of forests cannot be underestimated. We depend on forests for our survival, from the air we breathe to the wood we use. Besides providing habitats for animals and livelihoods for humans, forests also offer watershed protection, prevent soil erosion and mitigate climate change.

erythropoietin is a hormone produced by the _______________ to increase the rate of production and maturation of erythrocyte progenitor and erythroblast cells.

Answers

Answer: Kidneys

Explanation:

Both the kidneys and the liver produce erythropoietin. If only one answer is allowed, I would choose kidney because it produces nearly 85 percent of it.

How can detritivores be beneficial to the environment?
O A) allow predation to occur
O B) rid waste and dead matter
O C) provide food for autotrophs
O D) facilitate photosynthesis in plants

Answers

Answer:

B

Explanation:

QUESTION:

How can detritivores be beneficial to the environment?

O A) allow predation to occur

O B) rid waste and dead matter

O C) provide food for autotrophs

O D) facilitate photosynthesis in plants

ANSWER:

O A) allow predation to occur

O A) allow predation to occurO B) rid waste and dead matter

O C) provide food for autotrophs.

O D) facilitate photosynthesis in plants

__________________

CARRY ON LEARNING

CAN YOU BRAINLEST ME PLEASE

Which event is an example of condensation?
A. A puddle dries when exposed to the Sun.
B. A lake becomes a skating rink in the winter.
C. Fog forms in a valley.
D. A spilled drop of rubbing alcohol disappears.

Answers

Answer:Fog forms in a valley

Explanation:School

A student uses gummy worms to model the process of mitosis. The model is shown below.
Using the model, which statement correctly explains how mitosis preserves genetic continuity?
A
The daughter cells receive chromosomes that are recombined from the parent cells.
B
The daughter cells receive chromosomes that are identical to the parent cell.
С
Each daughter cell receives half of its chromosomes from each of the parent cells.
D
Each daughter cell receives twice as many chromosomes as the parent cell.

Answers

c should be your answer for the question

Each developing daughter cell obtains one set of chromosomes when mitosis comes to a finish. Thus, option C is correct.

What is genetic continuity of Mitosis?

According to the definition of mitosis, a cell divides into two so that each has the same amount of DNA as the original cell by dividing its nucleus and DNA.

When a single cell divides into two cells through mitosis, genetic continuity occurs.

One cell divides into two during the process of mitosis, and each of the two progeny cells has the same amount of DNA as the parent cell.

As the cell divides through the cytokinesis process, the nuclear membranes come back. Mitosis maintains genomic stability throughout successive generations of cells in this manner.

Therefore, Each daughter cell receives half of its chromosomes from each of the parent cells

Learn more about Mitosis here:

https://brainly.com/question/927601

#SPJ2

Why do Mitochondria and Chloroplasts have their own DNA?

Answers

Answer: To allow regulation of trans-membrane electron transport at the cell's energy barrier, genes in mitochondria and chloroplasts are co-located with their gene products.

Explanation:

Other Questions
How do the ocean waters most often provide fresh water for the Earth? solve 4(2x-5)=5x+4 pls a compound that dissociates weakly is exposed to an electric current attached to a light bulb what do you expect will happen what is the author's purpose for includingthe information about Maxime ou camps Solve for x.A. x = 7.5B.x = 15C.x = 10D.x=5 Chemical and physical properties of the seaborgium element no sale la respuesta asco! Using available materials at home make collage of things that motivate you to study better. Paste it on a short bond paper and write a short paragraph to explain your workSana po matulongan nyo po ako pleass guys i nedd help hindi po ito english home room guidance po yaan pleass fallow ko po ma ka sagot Helppp ppleasee ??!! Mandy feels like she can't deal with the stress anymore. First, her mothermoved into her house for two months because of major home renovations. Mandy feels like her mother is constantly critical of the way she keeps her house and handles her life. While Mandy knows helping her mom for the next couple of months is the right thing to do, she can't help being annoyed. Mandy is also having trouble at her job. Her job in the medical lab is usually fun, but the organization laid off three workers recently and Mandy finds her workload has been too much to handle. It is the hospital's busy time, too, so Mandy often works late to get the work done. On top of all that, Mandy had lent her best friend, Sylvia, $200 last month for rent, and Sylvia hasn't paid it back. Mandy not only needs the money but also feels that Sylvia was disrespectful when Mandy asked for the money back. Mandy is afraid thiswill affect their ten-year friendship. What type of stress is Mandyexperiencing?Chronic StressEustressO Acute stressO Episodic acute stress I have this problem on my test. Do I divide by 8 or 2 first to solve for x?Toby's cup can hold 8 times as many ounces of water as Terry's. Together, the cups hold 22 ounces of water. Write a report of two paragraph about planning for desert expedition and challenge that you faced What were three important influences on the growth ofdemocracy in America? which is an important part of revising an essay about a Turing point How to type a line above the number 6 on chromebook. need help with this algebra ii question John writes a definition for speed and time. Speed: Speed is the distance an object moves in an amount of time Time: The amount of time is measured in seconds, minutes, or hours Which statement is correct about John's definitions? (2 points) a Both definitions are incorrect. b Both definitions are correct. c The definition for speed is correct, the definition for time is incorrect. d The definition for time is correct, the definition for speed is incorrect. Those who suffer from "voodoo death," or sudden death syndrome, may experience a rebound of the __________ nervous system in response to a terrifying stimulus. Someone help me with this I will make you brain Help Me Pls1.Virgie will equally give P 742.60 among her 4 nephews. How much will each nephew get?A. P 185.65B. P 85.56C. P 158.65D. P185.552.Php 5876 are distributed equally among 26 men. How much money will each personget?D.P 262C. P 262B. P 226A. P 2253.Bernard wants to cut a straight board into 4 equal pieces. The board is 112.12 cmlong. How long should Bemard cut each piece?D. 28.04C. 28.03B. 28.02A. 28.014.When the in a basket is grouped into 2, 3 or 5, there is always an extra.5.How many 25centavo coins are equal to P 5.00?D. 18C. 21B. 19A. 20