As microscope technology improved over time, the magnification became advanced enough to discover cells in the 17th century. This discovery is largely attributed to Robert Hooke, and began the scientific study of cells, also known as cell biology. Over a century later, debate continued among scientists about how cells began. Most of these debates involved the nature of cell reproduction, and the idea of cells as a fundamental unit of life. Cell theory was eventually formulated in 1839.


The three tenets to the cell theory are as described below:

1. All living organisms are composed of one or more cells.

2. The cell is the basic unit of structure and organization in organisms.

3. Cells arise from pre-existing cells.


Anton van Leeuwenhoek is a scientist who saw cells soon after Hooke did. He made use of a microscope containing improved lenses that could magnify objects almost 30ox. Under these microscopes, Leeuwenhoek found moving objects that he named “animalcules,” which included protozoa and other unicellular organisms, like bacteria. He was also able to observe red blood cells and sperm cells. Leeuwenhoek's research can be used to support which of the tenets of cell theory?


A.) some cells emerge spontaneously.

B.) the cell is the basic unit of structure and organization in organisms.

C.) cells arise from pre-existing cells.

D.) all living and non-living items are made of cells.

Answer: The correct answer will be option-B.

Explanation:

Which state is in the Southeast region of the United States?(1 point) Responses:

Arizona
Pennsylvania
Georgia
Colorado

What are the components of motivation? Check all that apply.

How has the character of Ponyboy changed throughout the
book? plzzzzzzz help

Plan Your Future Discussion
No unread replies.No replies.
Where do you see yourself after high school?
What kind of job do you think you’ll eventually have? What skills will the job require?
What will you need to know going into the job?
Do you think someday you will have a family to support? Will you have student loans to pay off?
Do you see yourself doing one job for many years, or do you think you will try different kinds of jobs?

What is the god Poseidon’s name in Roman mythology?

PLZ ANSWER I NEED THIS ASAP! I'LL GIVE 30 POINTS TO WHOEVER CAN ANSWER.
what are a few things Cambodia could do to improve their country? Thanks to whoever can answer this :D

please help me with both questions asap and please be correct
i will mark brainliest

Which right is protected by the 5th amendment?

A.) the right to select one's own jury

B.) the right to postpone a trial that interferes with employment

C.) the right to avoid taxes that oppose one's religious beliefs

D.) the right to face an accuser in court

Due today- help
“In 1962, US planes discovered Soviet nuclear missiles in Cuba. The entire world was afraid that World War III could begin! US President John F. Kennedy and Soviet Premier Nikita Khrushchev managed to de-escalate the situation. The US removed its own missiles from Turkey and the Soviet Union removed the missiles from Cuba. This event was known as the Cuban Missile Crisis.”

Explain how the Cold War further increased tensions between the US and the Soviet Union during the Cuban Missile Crisis.

Pls answer don’t answer if you don’t know it

What advantages do you think the Nile River created for Ancient Egyptians?
Plz, help me!

what is the third one help me pls

From which starting point on Earth are time zones measured?

after reading about everything that the Mayans invented, which of the following words best describe the Mayans people?

1. curious and intelligent
2. sad and lonely
3. greedy and selfish
4. thoughtful but mean

Consider the writing prompt.

Explain the factors that led to the Berlin Airlift.

Which evidence would be most useful in addressing the topic laid out by the prompt?

A. The Berlin Airlift assisted the residents of West Berlin for 11 months.
B. The Berlin Airlift caused the Soviet Union to end the blockade of West Berlin.
C. The Berlin Airlift increased tensions between the United States and the Soviet
Union.
D. The Berlin Airlift began after the Soviet Union cut off all land access to the city of West Berlin.

Help giving brainliest!!!!!!!!!

How did women's’ role change politically, socially, and economically during Reconstruction?

Read the following weaknesses and for each use the space provided to say what you could do to turn those weaknesses into strengths.

Weaknesses:
I am always running late.


I wait until the last minute to do my homework.


I failed an assignment instead of asking for help.


My feelings are hurt when someone criticizes me.


I sometimes lose my homework.


I don’t work well on group projects with my classmates.


I sometimes have a bad attitude with my teachers and classmates.


I often lose my temper.


I have to do things my way.


I give up when an assignment becomes too difficult.


I am usually not open to doing things differently than what I normally do.

What were the consequences of the Leo Frank case? Check all that apply.

Frank spent decades living as a prisoner.

Frank was kidnapped and lynched by a mob.

Georgia’s governor changed Frank’s sentence.

Georgia’s governor released Frank from prison.

Historians came to believe that Frank was innocent.
Please help

A map of Europe titled Dominant Religions. Catholic regions include all of Spain and Italy, most of France, Belgium, Austria, large portions of Eastern Europe, and most of Ireland. Eastern Orthodox Christian regions include Greece, Albania, Macedonia, Bulgaria, Ukraine, and Russia. Eastern Orthodox Christian minorities are located in a small region in western Ukraine. Muslim regions include Turkey and areas north of the Black Sea. Protestant regions include Great Britain, northern Germany, Sweden, Norway, Finland, Switzerland, and northern Ireland. Protestant minority regions include small areas in France, southern Germany, and the southern Baltic region. What religion was dominant in Scandinavia during the Enlightenment? a. Protestant c. Eastern Orthodox Christian b. Catholic d. Muslim

Read the following paragraph from the section "An Intense Sound."

Linhart likes the acoustics of ice. Wood is soft and absorbs a lot of an instrument's sound vibrations. Ice absorbs the vibrations, too, but not as much. This makes for a very sharp sound. "Ice instruments produce a sound you can feel more intensely in your entire body," Linhart says.

How does this paragraph contribute to the development of the main ideas of the article?

A
It identifies the specific types of instruments that can be built from ice.
B
It gives a reason why ice instruments are more fragile than wood instruments.
C
It compares ice instruments with those made from traditional materials.
D
It explains the process that Linhart uses for creating instruments made out of ice.

Please hurry!!! pleaseeeeee i give 50 points

Please select the word from the list that best fits the definition

Britain, France, and Russia

what i thisssss pls helpppppppp

Giving brainliest !!!!!!!!!!!

Lots of things require balance: riding a bike, walking a balance beam, jumping rope. Losing balance can cause us to get hurt. The same is true for living things. Plants and animals must maintain an internal balance to stay healthy. Living things have internal communication systems that help to keep things in homeostasis or balance. A stimulus is any change in an organism’s environment that causes the organism to react. The change can be internal or external. For example, when you get hot, you move to the shade. The heat is an external stimulus and moving to the response is the response you make to cool off or come back to homeostasis. If you get hungry, you eat a snack. The hunger is an internal stimulus. Eating a snack is your response.

Which of these is a response to an external stimuli? Select ALL that apply.


A.) hibernation
B.) phototropism
C.) wilting
D.) thirst
E.) dormancy

Due today- help
“Because of the Cuban Missile Crisis, the US placed an embargo (ban) on the import of Cuban goods. Cuba was no longer allowed to sell its sugar cane to the US, which significantly hurt its economy. The embargo is still in place today!”

Look at the political cartoon and describe the current economic relationship between Cuba and the United States.

Many of the foods you eat contain large molecules called polymers that are broken down into their building blocks or monomers that can be used for processes such as cellular respiration. Which of these correctly pairs a macromolecule and its monomer? Select ALL that apply.

A.) carbohydrates: monosaccharides
B.) lipids: fatty acids and glycerol
C.) carbohydrates: glycosides
D.) proteins: amino acids
E.) proteins: peptides

number 14 please and thank u

The North used the rising number of immigrants to _______. The South felt no need to employ immigrants on their plantations because ______.