Answer:
Robert Hooke is accredited with observing the first cells in 1665. At that time, Robert Hooke used a microscope to look at cork cells.
In 1670, Antoni van Leeuwenhoek was accredited with being the first scientist to discover pond life. He used lenses to make the discovery.
Robert Brown (1773-1858) used a microscope to discover the nucleus.
Explanation:
The development of technology extremely advances the concept of cell theory to a larger extent. This facilitates scientists to deliver a more accurate and detailed image of tiny objects like cells and their organelles.
What are the three assumptions of cell theory?The three assumptions of the cell theory are as follows:
All living organisms whether plants or animals are made up of cells.A cell is the smallest unit of all living organisms. A Cell is the basic structural and functional unit of organisms.Prior to the cell theory, English scientist Robert Hooke in 1665, first discovered a dead cell in a thin slice of bottle cork under a microscope. Later in 1674, Antony Von Leeuwenhoek discovered the living cell for the first time with the improved version of the microscope.
In 1836, Robert Brown discovered a cell's nucleus. Then it comes to the time of 1839 when cell theory was proposed by Theodore Schwann and M. Schleiden. Till then, there was a lot of improvement is seen in the field of technology which complete changes the purpose and method of scientific analysis.
Therefore, the development of technology extremely advances the concept of cell theory to a larger extent.
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how does thermal energy is transferred from land and water to lower layers of Earth's atmosphere. How does this energy impact the lower layers of atmosphere?
Which of the following best identifies a way in which organs in an organism are similar to organelles in a cell?
A. Both are made of tissues.
B. Both carry out specific functions.
C. Both carry out chemosynthetic reactions.
D. Both are found in single-celled organisms.
Answer:
A
Explanation:
Both are made of tissues.
The organs in an organism and organelles in a cell both are similar as they both are made up of tissue. Thus, option A is correct.
What is tissue?The tissue is defined as a group of cell added together to form a tissue present in body and plays a vital role in covering of all internal as well as external area and organs of body, hollow organs and body lines cavity.
The structure of epithelial cells are they combined together by fitted junctions as well as adhering junction and attached to extra cellular matrix.
Tissue is the compact structure of cell and later tissue combined together to form organ and than organ system is formed to perform various functions of the body.
Therefore,the organs in an organism and organelles in a cell both are similar as they both are made up of tissue. Thus, option A is correct.
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The day of Josephine and Cora's campout had finally arrived. The two friends had been planning the campout for more than two weeks. They picked out a spot for the tent in Josephine's backyard. They chose the games they wanted to play. Now they were at the store with Josephine's dad buying camping food. "This campout is going to be perfect," Cora said as she dropped a bag of marshmallows into the cart. "We have the perfect tent, the perfect games, and the perfect food!"
Just then a loud clap of thunder sounded outside. The wind whipped as a bright flash filled the dark sky.
"But not the perfect weather," Cora moaned.
"That was thunder and that means rain. Rain means no camping," Josephine groaned.
"I guess we can stop shopping!" Cora snapped. She began taking food out of the cart.
As Josephine's father placed the food back in the cart, he told the girls not to give up on their campout. They paid for the food and went back to Josephine's house to wait out the storm.
At dinnertime the sky remained dark gray as the rain continued to pour down outside. The girls sat in silence while they ate. Cora looked out the window and said sadly, "I can't believe it's still raining. Our campout was supposed to be perfect."
What did Cora mean when she said, "This campout is going to be perfect"?
A) Cora's parents' house was the best place to host a campout.
B) Cora planned the campout to bond with her perfect friend, Josephine.
C) They made a lot of plans and collected a lot of stuff for camping.
D) Josephine and Cora's campout would celebrate their perfect attendance for not being absent from school.
WILL GIVE BRAINLEST
Answer:
C) They made a lot of plans and collected a lot of stuff for camping
Explanation
Plants reduce soil erosion by protecting the land from the weather. Which spheres are involved?
Group of answer choices
Atmosphere and biosphere
Atmosphere and geosphere
Hydrosphere and geosphere
Geosphere and biosphere
Sometimes fires burn large areas of forests that are part of the biosphere. Other than the biosphere, which of Earth's other spheres is a forest fire most likely to affect? (choose 2)
Group of answer choices
geosphere
cryosphere
hydrosphere
atmosphere
Answer:
1.) Atmosphere, geosphere
2.) Atmosphere, hydrosphere
Explanation:
1.) The atmosphere is responsible for the weather and the geosphere is made up of the earth and the plants roots.
2.) The smoke from the fire can cause a disturbance with certain levels of gas components in the air and the ash can pollute sources of water and harm wildlife.
The sphere involved in the reduction of soil erosion is geosphere and biosphere. Earth's other spheres is affected by forest fire is atmosphere and geosphere. The correct option for question 1 is D and for 2 are A and D.
What is biosphere?The biosphere is largely made up of all ecosystems that are present on Earth.
The biosphere encompasses everything from deep forest root systems to the complete darkness of intertidal zone, lush rain forests, high mountain peaks, and buffer zones like this one, where ocean and terrestrial ecosystems collide.
A hydrosphere is a planet's total amount of water. The hydrosphere includes water on the planet's surface, underground, and in the atmosphere. The hydrosphere of a planet can be liquid, vapor, or ice.
The geosphere contains all of Earth's rocks, from near the interface rock beneath the crust to ancient, towering mountains to grains of sand on a beach.
Thus, correct option for question 1 is D and for 2 are A and D.
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PLEASE HELP!!!! This is timed!!!
Which 2 scientists are credited for the invention of the first microscope? ( Pick 2 )
These are your answer choices
A=Hans Janssen
B=Zacharias Janssen
C=Robert Hooke
D=Rudolph Virchow
E=Anton van Leeuwenhoek
Answer:
A and B
Explanation:
name 3 things your body does to maintain homeostasis
name 4 characteristics of a living organism
Answer:
All living organisms have ways of maintaining homeostasis. They have mechanisms for controlling such factors as their internal temperature, water balance, and acidity.
Explanation:
hope this helped!!
What are three possible future options for drinking water in areas that are polluted?
Photosynthesis below using your notes. Then fill in the blanks in the sentence.
______+_______→ _______+_______
In the process of photosynthesis, ________ energy is transformed into __________ energy.
alot of pointz
Answer:
Explanation:
Photosynthesis is the process by which plants, some bacteria, and some protistans use the energy from sunlight to produce sugar, which cellular respiration converts into ATP, the "fuel" used by all living things. The conversion of unusable sunlight energy into usable chemical energy, is associated with the actions of the green pigment chlorophyll. Most of the time, the photosynthetic process uses water and releases the oxygen that we absolutely must have to stay alive. Oh yes, we need the food as well!
We can write the overall reaction of this process as:
Sunlight + Carbon Dioxide + Water → Oxygen + Glucose
In the process of photosynthesis, light energy is transformed into chemical energy.
Which of the following is required for conduction to occur between two parts of
Earth's geosphere?
1.There must be contact between the two parts.
2.The two parts must have the same temperature,
3.The two parts must both be either liquids or gases.
4.There must be either a gas or a liquid circulating or flowing.
how can power plants be created in ways that reduce pollution
Answer: use solar energy then
Explanation:
Excerpt from The Day of the Bake Sale
Jenna McKean
1Cindy had spent the last three weeks organizing a bake sale to raise money for her small town's animal shelter. Cindy asked her friends to bake breads and other tasty treats to sell at the bake sale. She had also stayed up late the night before the sale baking blueberry muffins.2Finally, everything was ready for the bake sale. Two of Cindy's friends, Jorge and Pauline, came along on Saturday morning to set up tables. Cindy thought she could do it by herself, but they insisted they come along. They would need several long tables to hold all the supplies for the bake sale. As they set up tables on the town square, Cindy noticed a few dark clouds in the sky. However, she was too busy to stop working and worry about them. As the friends finished putting the tables together, they heard a loud clap of thunder.4Jorge had an idea. They could move the tables under the covered pavilion so everything would stay dry. People bought bread and muffins, and Cindy and her friends raised money for the animal shelter. At the end of the day, Cindy thanked her friends for their help.
I couldn't have done it without you," she told them.
What does it mean when Cindy said, "I couldn't have done it without you" ?
A) Cindy meant that she could not and would not do the bake sale alone!
B) This competition between Cindy and her friends couldn't be done without them.
C) The bake sale was quite an undertaking, a great deal of work for just one person.
D) Many more bake sales would have to be planned to raise money for the animal shelter.
WILL GIVE BRAINLEST
Answer:
The answer is C because it is saying and basically summarizing what her friends did for her, they helped Cindy even though all these events were happening and if she wouldve been alone, it would be more complicated and she couldnt have done it all alone!!
What is the main idea of this text? Before the invasion, scientists developed computer models to predict the effect of the zebra mussels. But they were still surprised by what happened. By 1992, there were so many zebra mussels, scientists estimate
they were filtering a volume of water equal to all of the water in the estuary every 1-4 days during the summer. In the years right after the invasion, phytoplankton fell by 80 percent. Zooplankton (which eat phytoplankton) declined by half. And the smallest zooplankton (called micro-zooplankton), fell by about 90 percent. By 1994, scientists hypothesized that zebra mussels were responsible for these changes. The mussels were filtering huge amounts of phytoplankton from the water. Less phytoplankton meant less food for zooplankton, so their numbers were shrinking too. Competition was taking place and the
zebra mussels seemed to be winning.
A. In the years right after the invasion, zebra mussels evolved and adapted to the Hudson River ecosystem.
B. In the years right after the invasion, zebra mussels caused a number of changes in the Hudson River ecosystem and food web.
C. In the years right after the invasion, zebra mussels did not have a major impact on the Hudson River ecosystem or food web.
D. At first, zebra mussels did not have any impact on the Hudson River ecosystem, but their impact increased over time.
please help me I will give out the brain thing and extra points.
Answer:
B
Explanation:
I don't really know to be honest. I would guess it's B because it mentions the impacts, such as increased population in the mussels and decrease in zooplankton and phytoplankton.
Which of the following statement(s) is true? Check all that apply. *
4 points
Animal cells are prokaryotic
Plant cells are eukaryotic
Plant cells are prokaryotic
Animal cells are eukaryotic
Following statements are true:
Plant cells are eukaryotic
Animal cells are eukaryotic
What are eukaryotic cells?
Eukaryotic cells are characterized by the presence of a true nucleus, which is a membrane-bound structure that contains the cell's genetic material. They also typically have other membrane-bound organelles, such as mitochondria, Golgi apparatus, and endoplasmic reticulum, which perform specific functions within the cell.
In contrast, prokaryotic cells are characterized by the absence of a true nucleus and other membrane-bound organelles. Instead, they have a single, circular chromosome that is not enclosed in a nucleus, and they have other simple cell structures that perform functions within the cell.
Both plant cells and animal cells are eukaryotic cells, while prokaryotic cells are found in bacteria and other single-celled organisms. Therefore, the statements "Animal cells are prokaryotic" and "Plant cells are prokaryotic" are not true, while the statements "Plant cells are eukaryotic" and "Animal cells are eukaryotic" are true.
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Cloud cover impacts the temperature on land. Which spheres are involved?
Group of answer choices
Atmosphere, hydrosphere, and geosphere.
Geosphere and biosphere
Hydrosphere, atmosphere and biosphere.
Atmosphere and hydrosphere
Chemicals in the air impact the weathering of rocks. Which two main spheres are involved?
Group of answer choices
Atmosphere and biosphere
Atmosphere and hydrosphere
Atmosphere and geosphere
Hydrosphere and geosphere
Answer:
the atmosphere
Explanation:
The lowest part of the atmosphere on Earth is called the troposphere. The troposphere contains the majority of the atmosphere's mass (about 75–80%). The troposphere is where the majority of clouds are situated, and it is where practically all weather takes place. Thus, option 1.A 2.B is correct.
What cloud cover spheres are involved?Technically, clouds belong to both the hydrosphere and the atmosphere. The water on Earth as a whole is referred to as the hydrosphere. This covers both surface water, such as seas, lakes, and rivers, as well as groundwater. Water in the atmosphere is also a part of the hydrosphere.
The troposphere is almost entirely where clouds are found. Since vertical transfer is constrained by high stability and must pass through the tropopause, which is freezing and has a negligibly low saturation vapour pressure, the stratosphere is extremely dry.
Therefore, Clouds are technically a part of both the hydrosphere and the atmosphere. The hydrosphere refers to all the water on Earth.
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Helpppppp which arrow shows evaporation im really confused and I think it’s C but it’s probably wrong so please help me :((
Answer: A
Explanation:
Answer:
A
Explanation:
the awnser a shows water from the ocean turning into clouds/going into clouds which is how evaporation works. water gets heated up and turns into vapor and in this question goes into the clouds
hope this helps!
REEEEEEEEEEEEEEEEEEEEEEEEEE
What is the velocity if there are 25 waves that pass by a given point in 10 seconds and the wavelength is 50 cm?
A. 125 cm per second
B. 2.5 cm per second
C. 12.5 cm per second
D. 15 cm per second
Which of the following is the most accurate description of the reactants (raw materials) for cellular respiration? *
A.) Carbon dioxide + water
B.) Glucose + oxygen
C.) Carbon dioxide + oxygen
D.) Glucose + carbon dioxide
Answer:
I think it is B hopefully this helps you
B
Explanation:
Its B becauase Oxygen and glucose are both reactants in the process of cellular respiration
What body part contains epithelial tissue, in your answer, explain how cell arrangement helps this body part perform its function.
Answer:
Epithelial tissue covers the outside of the body and lines organs, vessels (blood and lymph), and cavities. Epithelial cells form the thin layer of cells known as the endothelium, which is contiguous with the inner tissue lining of organs such as the brain, lungs, skin, and heart.
explain how cell arrangement helps this body part perform its function. :
Its tightly packed cells allow for protection against harmful substances.
Explanation:
Epithelial tissue covers the outside of the body and lines organs, vessels (blood and lymph), and cavities. Epithelial cells form the thin layer of cells known as the endothelium, which is contiguous with the inner tissue lining of organs such as the brain, lungs, skin, and heart. The free surface of epithelial tissue is usually exposed to fluid or the air, while the bottom surface is attached to a basement membrane.
The cells in epithelial tissue are very closely packed together and joined with little space between them. With its tightly packed structure, we would expect epithelial tissue to serve some type of barrier and protective function and that is certainly the case. For example, the skin is composed of a layer of epithelial tissue (epidermis) that is supported by a layer of connective tissue. It protects the internal structures of the body from damage and dehydration.
Epithelial tissue also helps to protect against microorganisms. The skin is the body's first line of defense against bacteria, viruses, and other microbes.
Epithelial tissue functions to absorb, secrete, and excrete substances. In the intestines, this tissue absorbs nutrients during digestion. Epithelial tissue in glands secrete hormones, enzymes, and other substances. Epithelial tissue in the kidneys excrete wastes, and in the sweat glands excrete perspiration.
Epithelial tissue also has a sensory function as it contains sensory nerves in areas such as the skin, tongue, nose, and ears.
Ciliated epithelial tissue can be found in areas such as the female reproductive tract and the respiratory tract. Cilia are hair-like protrusions that help propel substances, such as dust particles or female gametes, in the proper direction.
Precipitation happens when clouds of water droplets are too
cold
small
large
hot
Answer:
Without looking at the choices I would have said heavy but since that is not on here I would say large.
Explanation:
When the water droplets in the clouds combine them because heavy and form into raindrops.
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Head sore, eyes burning, and ear pounding and pounding and pounding, Kasem still fights through the smoke. The explosion rocked Kasem's sense of direction and location. "Help!" he screams out into the thick haze that envelops him like an oversized blanket.
Kasem stumbles several yards and finally sees a window. The window! The window is open and Kasem notices the smoke pouring out of the blessed opening. Freedom! Kasem vaults himself forward and falls through this blessed opening. A bush a few feet below the window breaks his fall.
Kasem manages to stand and brush himself off. A figure, hazy and distorted, runs to him. "It must be a firefighter," Kasem thinks before passing out on the debris-littered yard.
Based on evidence in the text, why would the author MOST LIKELY choose to write this story in third-person limited point of view?
A) The author wants to be able to lay out the events of the story in sequential order.
B) The author wants the reader to understand the thoughts and feelings of multiple characters.
C) The author wants the ability to talk directly to the audience to explain certain situations.
D) The author wants the events of the story to unfold through the perspective of one main character.
Answer:
I would go with C, because in this the author is talking in great detail abt it all even describing the smallest things
Look at the two plants in the photo. Make a claim about what happened to the plant on the left. Provide evidence to support your claim, and explain your reasoning.
Which of the following best describes the products of photosynthesis *
A.) Carbon dioxide + water
B.) Oxygen + carbon dioxide
C.) Glucose + oxygen
D.) Energy + water
Justin designed an experiment to find out how running up bleachers affects his heart rate. First he records his resting heart rate and then runs up the bleachers 10 times. Each time he reaches the top, he records his heartrate then rests 20 minutes.
Which is involved in Justin's experiment?
replication
repetition
both repetition and replication
neither repetition nor replication
Answer:
I believe it's only repetition which is doing the experiment over and over again.
Explanation:
Replication on the other hand would be if he was repeating some one else experiment with the same guidelines.
Please answer this asap.
Answer:
How could energy have played a role in the different rock types forming? Energy causes different types of rock to change in different ways. Energy changes igneous rock into liquid rock and changes sedimentary rock into small pieces of rock. ... No, sedimentary rock can only form out of material from other sedimentary rock.D
Explanation:
Based on what you have learned, write two or three sentences explaining how the energy in fossil fuels is converted to electricity.
Sample Response: Fossil fuels are burned to heat water and create steam. Moving steam turns turbines, which generate electricity.
Answer:
Fossil fuels are burned to heat water and create steam. Moving steam turns turbines, which generate electricity.
Explanation:
sample
Fossil fuels are rock-like, gas, or liquid resources that are burned to generate power. They include coal, natural gas, and oil, and are used as an energy source.
What do you mean by fossil fuels?Fossil energy sources, including oil, coal and natural gas, are non-renewable resources that formed when prehistoric plants and animals died and were gradually buried by layers of rock.
When fossil fuels are burned, they release large amounts of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, causing global warming. Already the average global temperature has increased by 1C.
Coal, petroleum (crude oil) and natural gas are easy to use for everyday needs that include electricity generation, heating, and transportation. Fossil fuels have become a dominant energy source because they contain a lot of transportable energy in a small package.
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Please answer this asap.
Answer: the 1 answer
Explanation:
last false rock need energy
2 different place can have same
weather is wind water ice other rock ect. but not heat
Which of the following accurately describes the word equation for photosynthesis? *
A.) Glucose + oxygen ---- > carbon dioxide + water + energy (ATP)
B.) Carbon dioxide + water ---(light energy)---> glucose + oxygen
C.) Glucose + water -----> oxygen + carbon dioxide + energy (ATP)
D.) Carbon dioxide + energy ---(light energy)---> oxygen + water + glucose
Answer:
Carbon dioxide + water + energy from light produces glucose and oxygen.
so B
Which statement best explains the difference between photosynthesis and cellular respiration? *
A.) Photosynthesis, a process that occurs in the mitochondria, is how plants make their own food. Cellular respiration, a process that occurs in the chloroplast, is how cells produce energy from food.
B.) Cellular respiration, a process that occurs in the chloroplast, is how plants create their own food. Photosynthesis, a process that occurs in the mitochondria, is how cells produce energy from food.
C.) Photosynthesis, a process that occurs in the ribosomes, is how plants make their own food. Cellular respiration, a process that occurs in the endoplasmic reticulum, is how cells produce energy from food.
D.) Cellular respiration, a process that occurs in the mitochondria, is how cells produce energy from food. Photosynthesis, a process that occurs in the chloroplast, is how plants make their own food.
PLEASE HELP ME ANSWER THIS (photo included)
Answer
sorry you are wrong person i was going to answer someone else
Explanation:
Answer:
yes and no but i would yes more so yes
Explanation:
you see protein is converted to muscle mass in this the muscle mass would be in the legs because they run other than that I have no explanation