6. Imagine a cell has six sides, each side measuring 4
micrometers (um) in length. Use this information
and the equations below to make the following
calculations:
Surface area = length x width x number of sides
Volume = length x width x height
a. What is the surface area of the cell?
b. What is the volume of the cell?
c. What is the surface area-to-volume
ratio for the cell?
The surface area of the cell is 96μm², the volume of the cell is 64 μm³ and the surface area-to-volume ratio is 1.5 μm⁻¹.
What is surface area and volume?
The surface area of the cell is the area which is occupied by the surface of the object. The surface area of the cell with six sides of equal measurement = 4 μm.
Surface area of the cell can be calculated by the formula:
Surface area = length × width × number of sides
Surface area = 4 μm × 4 μm × 6
Surface area = 16 μm² × 6
Surface area = 96 μm²
The volume of the cell is the capacity of the cell. It is how much space is present inside the cell.
The volume of the cell with side 4 μm can be calculated by the formula:
Volume = length × width × height
Volume = 4 μm × 4 μm × 4 μm
Volume = 64 μm³
The surface area-to-volume ratio is the surface area divided by the volume of the cell. This indicates how much surface area is available compared to how big or the capacity of the cell is.
The Surface area: Volume ratio can be calculated as:
Ratio = 96 μm²: 64 μm³
Surface area-to-volume ratio = 1.5 μm⁻¹
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Answer: 96, 64, and 3:2.
Explanation: did the checkpoints and got it right.
It is night time. Cathy walks into her house and puts the light on
The bright light makes her pupils go smaller. This happens very quickly
(a) Cathy's pupils getting smaller is an example of a reflex action.
Write down two things which show that this is a reflex
Answer:
Explanation:
The eye becomes smaller when light is reflected on it.
Which statement is characteristic of a communist system?
Communism (from the Latin communis) is an ideology and a political, philosophical, social and economic movement whose end is the establishment of an objective communist society, that is, a socioeconomic order structured under the ideas of egalitarianism, common ownership of the means of production and in the absence of social classes.
How is a communist society?In Marxist thought, a communist society or communist system is a type of society and economic system postulated to emerge from technological advances in the productive forces, it is characterized by common ownership with free access to the means of production, to articles of consumption and, without the existence of division
Whit this information we can conclude that A communist party is a political party whose objective is the political, social, cultural and economic application of the principles of Communism through a government.
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How were Churchill's and Stalin's views of the postwar world different from Roosevelt's?
A. They wanted all nations to focus on domestic issues and not get involved with each other
B. They favored keeping spheres of personal influence
C. They believed in a return to colonial powers and borders
D. They believed in international organizations to arbitrate disputes
what is the scientific method?
What are the four macromolecules?
Describe the structure of a monosaccharide.
Describe the structure of a disaccharide.
Describe and draw the structure of a nucleotide.
Where are nucleic acids found?
Describe and draw the structure of an amino acid.
How can two molecules with the same chemical formula react differently?
Describe the structure of a protein.
What is the role of an enzyme in a chemical reaction?
What happens to an enzyme once it catalyzes a chemical reaction?
Answer: these are the carbohydrates, lipids (or fats), proteins, and nucleic acids.
All the monosaccharides have the formula as (CH2O) n. Here, the two hydrogen atoms and one oxygen atom associate itself to the central carbon molecule. A hydroxyl group is formed when oxygen will bond with hydrogen. Several carbon molecules bond together because 4 bonds can form on carbon.
The structure of disaccharide is much similar to that of a monosaccharide. They also consist of multiple hydroxyl groups and a functional group that could be an aldehyde or a ketone. The only difference is the presence of a glycosidic bridge connecting the two molecules.
a phosphate group, a 5-carbon sugar, and a nitrogenous base.
their atoms are connected in different orders.
An enzyme is a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process. The biological processes that occur within all living organisms are chemical reactions, and most are regulated by enzymes.
the enzyme is able to participate in other reactions
Explanation:
Zara is using a microscope to look at some animal cells on a slide.Ahe knows that there are animal cells on the slide but when she looks through the microscope,She cannot see any cells.GIVE THREE REASONS
describe how a change in energy relates to bonds forming and breaking ?
identify the difference between exothermic and endothermic reactions ?
The area inside a cell has a lower concentration of water molecules than the
area outside a cell. What role might the cell membrane play in moving the water?
A. The cell membrane will allow water to pass freely into the cell by
osmosis.
B. The cell membrane will use endocytosis to move water into the
cell.
C. The cell membrane will produce energy to move water out of the
cell.
D. The cell membrane will use active transport to force water out of the cell.
Answer:
the correct answer is A
Explanation:
The cell membrane will allow water to pass freely into the cell by osmosis, because the environment or solution in which the cell present is hypotonic
What is the cause of autoimmune diseases?
A. They can be caused by both a mutated gene and a pathogen.
B. The causes of autoimmune diseases are unknown.
C. They are caused by a pathogen.
D. They are caused by mutated genes.
Answer: B
Explanation: body's natural defenses — the immune system — attack the body's own healthy tissue
Water's properties make it vital for life in many ways. Match the property of water to the aspect
of life that directly benefits from that property.
Adhesion and cohesion O
Universal solvent O
Expands upon freezing O
High specific heat O
O
Nutrients are absorbed into your blood from the foods you eat.
The cells in your body stay at relatively similar temperature because
they are filled with water.
Water molecules are pulled up from the roots to the leaves of a tree.
Fish and other organisms swim freely at the bottom of a lake that
has frozen over.
C
La
1.
High specific heat = The cells in your body stay at relatively similar temperature because they are filled with water.
(magic number is 37° Celsius or 98.6° Fahrenheit)
2.
Expands upon freezing = Fish and other organisms swim freely at the bottom of a lake that has frozen over
3.
Adhesion and cohesion (stickiness of water) = Water molecules are pulled up from the roots to the leaves of a tree
XYLEM is the part of the plant that does this
TRANSPIRATION or DIFFUSION is the process by which the water moves
4.
Universal solvent = Nutrients are absorbed into your blood from the foods you eat
(when you hear solvent think ice tea powder or a mix which you put in water)
Evidence Notebook Think back to the volcanic eruption on the island. Once the lava cooled,
plants began to grow. Is this an example of a stable ecosystem? Use evidence from the discussion of
resilient and resistant ecosystems to support your answer.
Yes, this is an example of a stable ecosystem because the population of plants which is disturbed will recover again.
What is the difference between resistant and resilient ecosystem?A population in an ecosystem can survive a disturbance because of its resistance or its resilience. Resistance refers to the ability of a population to tolerate the disturbance while on the other hand, the resilience refers to the ability to recover a population after suffering from the disturbance. Stability of an ecosystem is defined as to the capability of a natural system to do self-regulating mechanisms in order to return to a steady state after disturbance occurrence of disturbance.
So we can conclude that Yes, this is an example of a stable ecosystem because the population of plants which is disturbed will recover again.
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WILL GIVE BRAINLIEST - Scientists often need to look for patterns that occur in the data they collect and analyze. Explain why identifying patterns are important, using an example from your investigation about differences in regional climate.
Answer:
Studying the climate helps us predict how much rain the next winter might bring, or how far sea levels will rise due to warmer sea temperatures. We can also see which regions are most likely to be affected by extreme weather, or which wildlife species are threatened by climate change.
Explanation:
(01.03 LC)
For an object at rest, the normal force equals the gravitational force. What is the sum of these forces called?
Group of answer choices
Inertia
Potential force
Net force
Unbalanced force
If the sum of the normal force equals the gravitational force, the sum of the two forces is called the net force.
What is the sum of forces?We know that force is a vector quantity. A vector quantity is a quantity that has both magnitude and direction. The direction of the vector can be shown by a bold face diagram with an arrow above the sign of the vector.
When we have more than two one force acting together, the resultant of the two forces obtained as a sun is called the net force hence, the sum of the normal force equals the gravitational force, the sum of the two forces is called the net force.
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Very easy middle school homework please help
Answer: BO YOUR LAZY!
Explanation:
I need help pls its for a i-ready
The evidence that matches the review is; Spores don't need to eat and can live under water.
What is evidence?In the scientific parlance, the term evidence entails a proof. It is something that confirms that an assertion is true. The only way that valid evidence could be obtained in science is by conducting an experiment. The experiment must be controlled and the factors that are tested must be adequately randomized to ensure the reliability of the results that we obtain from such a test.
In this case, we need evidence that could prove or disprove the fact that spores are able to survive washing. This prove would be fitted into the evidence section of the cart in the question.
The most valid evidence among the options is that; spores don't need to eat and can live under water.
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Atoms that have gained or lost electrons are called
O elements
Olons
O molecules
O compounds
Atoms that have gained or lost electrons are called ions (cation and anion).
Define atoms.An atom is a unit of matter that specifically characterizes a chemical element. One or more negatively charged electrons surround the core nucleus of an atom, which is made up of all of them. One or more protons and neutrons, which are comparatively heavy particles, can be found in the positively charged nucleus.
The fundamental units of matter are called atoms. Atoms make up anything that has mass and occupies space.
Define atomic mass.The atomic mass, also known as the atomic weight, is the sum of the masses of the protons, neutrons, and electrons in an atom. In atomic mass units, the weight or mass of an atom is expressed.
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name 4 microorganism that we should be concerned with for healthcare settings
Most fossil fuels derive their energy from prehistoric processes of ____
A. Vulcanism
B. Fault lines and fractures
c. Erosion
D. Decomposition
Look at the photo. Describe the differences between the plants. What do you think caused these differences? Explain your reasoning.
What parts of the brain are being used when talking to a friend? Tell me about 4 parts of the brain that are activating, and 1 lobe (a total of 5 parts). Explain what/how they are activating when you are talking to a friend face to face.
The parts of the brain that are being used when talking to a friend include the following: Cerebrum, Broca’s area, Wernicke’s area, Arcuate fasciculus, and cerebellum.
What is a brain?
The brain is the major organ of the central nervous system that helps in the coordination of various parts of the body.
The parts of the brain that are involved during a conversation with another individual include the following:
Cerebrum: This is further divided into the frontal lobes and the temporal lobes which are responsible for speech formation during a conversation.Broca’s area: This is the area of the brain that helps to turn ideas and thoughts into spoken words.Wernicke’s area: This is the area of the brain that is concerned with understanding and processing speech.Arcuate fasciculus: This helps in the formation of words.Cerebellum: It helps in coordinating voluntary muscle movements like opening and closing your mouth during the conversation.Learn more about brain here:
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11. Give the decimal or scientific notation for the following: a. 10240 ___________ b. 4.98×102 ___________ Lesson Objective: Convert between the Celsius and Kelvin temperature scales. 12. Which temperature scale is typically not used for scientific measurements? a. Celsius b. Fahrenheit c. Centigrade d. Kelvin 13. The Celsius scale has ____ degrees between the freezing point and the boiling point of water. a. 75 b. 271 c. 200 d. 100 14. True or False: The Celsius scale was developed by the Scottish physician and mathematician Anders Celsius. 15. True or False: There is no molecular motion at 0 K. 16. An object’s ________________ energy is the energy due to motion. 17. Temperature is a measure of the average ______ ______ of the ________ in motion.
Please find the correct answers to fill in the given blanks below:
11. Scientific notation for:
a. 10240 = 1.02 x [tex]10^{4}[/tex]
b. 4.98×[tex]10^{2}[/tex] = 4.98×[tex]10^{2}[/tex] ; it remains the same because it is accurate according to the rules of writing scientific notation.
12. The temperature scale that is typically not used for scientific measurements is option c. Centigrade.
Fahrenheit, Celsius, and Kelvin are the three scales that are most frequently used to measure temperature.Because all molecular activity stops at its zero points, Kelvin is known as the absolute scale.13. Between freezing and boiling on the Celsius scale, there are (100 - 0) = 100 degrees.
14. The given statement about the developer of the Celsius scale is True. It was developed by Anders Celsius.
15. True, at 0 K, there is absolutely no molecular motion. This is known as absolute zero.
16. Kinetic energy
An object's kinetic energy is the power it has as a result of motion. It is explained as the amount of effort required to move a mass-based body from rest to the indicated velocity. The body keeps its kinetic energy, which it acquired during acceleration unless its speed changes.
17. The average kinetic energy of the particles in a substance is measured by its temperature.
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The graph of population growth for any given species in an ecosystem
eventually levels off. The point at which the graph line becomes level is called
the ecosystem's.
OA. immigration rate
OB. carrying capacity
C. total birthrate
O D. exponential growth
Do all living things change the composition of the air they breathe? What is happening when living things give off substances?
The answers include the following:
All living things don't change the composition of the air they breathe as they are made of different gases which aren't separated.When living things give off substances, excretion is the process which is said to be happening.What is Excretion?This is a process which is performed by all living organisms and it involves the elimination of metabolic waste from the body system.
Examples of metabolic wastes which are eliminated from the body include carbon dioxide, excess salts etc. They are removed because building up in the body will lead to the damage of organs and if serious death mat occur in this type of scenario.
Air is composed of different gases and they aren't changed however the oxygen which is breathe in is usually more than the one which is excreted due to the body making use of it for its daily activities.
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Various forms of bacteria
.
Inquiry-You will conduct online research and will collect information. Then, you will communicate your results in written form.
21st Century Skills-You will employ online tools for research and analysis, and communicate effectively.
Directions
Read the instructions for this self-checked activity. Type in your response to each question, and check your answers. At the end of the
brief evaluation of your work.
Activity
Research and identify which plants on earth are the most abundant in biomass and the ecosystem(s) in which
these plants can be found. Discuss how varying
carbon dioxide levels can affect the growth of plants, thus affecting the
levels of biomass.
Trees are the plants that are found most abundant plants and they live in an ecosystem called the forest.
The elevating levels of carbon dioxide in the atmosphere cause both positive and negative effects. In plants, the process of photosynthesis is rapid thus, leading to greater production of biomass.
How does the increasing level of carbon dioxide affect the plants?The concentration of CO₂ is increasing due to many factors, from 280 ppm to 400ppm. These as mentioned have both negative and positive responses.
The positive is that the plants undergo rapid photosynthesis and increase the levels of biomass. But there is a negative aspect which we should be concerned about the quality of crops such as nutrients protein concentration, etc.
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The change in the height of water in the straw of the model instrument is noted at regular intervals of time . Which of these best describes the function of the model instrument ?
The statement that best describe the interaction in the atmosphere, hydrosphere and biosphere is option d: A hurricane carries ocean water across the coast and damages houses of people.
What are some form of hydrosphere-atmosphere interactions?
The hydrosphere's evaporation serves as the medium for the development of clouds and rain in the atmosphere. Rain is one way that the atmosphere returns this water to the hydrosphere.
Note that the hurricane, ocean water and the cost acts as the point of interaction between the atmosphere, hydrosphere and biosphere.
Hence option D is correct.
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See full question below
Which of these statements best describes an interaction between the atmosphere, hydrosphere and biosphere? A. Strong winds blow over a lake and create ripples. B. A river flows downhill at a very high speed and uproots trees. C. The magma flowing out of a volcano blocks the movement of a river. D. A hurricane carries ocean water across the coast and damages houses of people.
2 questions- Replication Practice (remember: A pairs with T, and G pairs with C)
1. ATGGGCTACGAAT
DNA:
Replicated Strand:
2. TGCGCTATATCCG
DNA:
Replicated Strand:
Answer:
The base pairs for DNA replication are Thymine and Adenine, so (A and T). Cytosine and Guanine so (C and G).
DNA replication takes place in the nucleus of eukaryotic cells because prokaryotes don’t have nucleus’s.
how are elements in the group in the periodic table alike?
Rudolf Virchow's work resulted in the claim that all cells come from preexisting cells. How did this impact the creation of cell theory?
It significantly contradicted earlier claims about cells in cell theory.
It caused scientists to quit researching cells until new microscopes were invented.
It showed that cell theory is very misunderstood in the scientific community.
It added to our understanding of cells, completing the claims in cell theory.
Rudolf Virchow's work resulted in the claim that all cells come from preexisting cells and it impacted the creation of cell theory by adding to our understanding of cells, completing the claims in cell theory.
What is Cell?This is referred to as the smallest unit of life and undergoes aggregation to form tissues. It has different types and is present in all living organisms which ensures various functions are met for survival.
Rudolf Virchow was a scientist who was able to prove that cells come from preexisting cells and it impacted how the cell theory was created which states that it is the smallest unit of life.
Virchow's work was able to add to our understanding of cells and is therefore the reason why option D was chosen as the most appropriate choice.
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Answer:
It added to our understanding of cells, completing the claims in cell theory.
Explanation:
Studies of muscle cells show that they have more mitochondria than skin cells. What conclusion can be drawn from this information?
A.
Muscle cells use more energy than skin cells.
B.
Skin cells utilize cellular respiration more efficiently.
C.
Muscle cells store more DNA than skin cells.
D.
Muscle cells use more energy than any other cells.
The conclusion from the information that muscle cells have more mitochondria than skin cells is that muscle cells use more energy than skin cells (Option A).
Why there are many mitochondria in muscle cells?The scientific reason for which there are too many mitochondria in muscle cells is that these cell need to produce a high amount of energy and mitochondria generate ATP.
In conclusion, the conclusion from the information that muscle cells have more mitochondria than skin cells is muscle cells use more energy than skin cells (Option A).
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