Answer:
1. All living things are made up of cells.
2. Cells are the basic building blocks of life.
3. All cells come from preexisting cells created through the process of cell division.
As science evolved, three more components were added to the theory. Some biology classes don’t require you to know these parts of the cell theory because they weren’t part of the original definition, but it’s still useful to be aware of them:
4. Energy flow occurs within cells.
5. Hereditary information is passed from cell to cell.
6. All cells have the same basic chemical composition.
So what does the cell theory actually mean? Let’s break it down. The first part of the cell theory states that all living things are made up of cells. Anything that’s alive, from bacteria to plants to humans, is composed of cells. And what are cells? The literal definition is a cell is a group of organelles surrounded by a thin membrane.
The cell theory definition states that cells are the building blocks of life. Cells both make up all living things and run the processes needed for life. Your hair, skin, organs, etc. are all made up of cells. In fact, each person is estimated to be made up of nearly 40 trillion cells! Each part of a cell has a different function, and your cells are responsible for taking in nutrients, turning nutrients into energy, removing waste, and more. Basically, everything your body does, it does because cells are directing the action!
The third part of the cell theory definition states that all cells come from preexisting cells. This means that cells don’t just appear out of thin air (known as “spontaneous generation”). New cells are always made from current cells. This means that all current life on the planet is descended from the very first cells, which first made an appearance on Earth roughly 3.5 billion years ago. Cells have been replicating themselves continuously ever since.
And what does the newer part of the cell theory state? Part four refers to the fact that, in all living cells, energy is continuously transformed from one type to another. Examples of these processes include photosynthesis (where plant cells convert light energy into chemical energy) and cellular respiration (where both plant and animal cells convert glucose into energy). Part five refers to DNA and the fact it is passed from parent cell to child cell. Finally, part six of the cell theory tells us that all cells are made up of the same chemicals: water, inorganic ions, and organic molecules.
Explanation:
Which statement best describes a keystone species?
O A. It is the largest population in the community.
B. It occupies the highest trophic level in the
community
C. Its absence would affect many organisms in the
community.
O D. It is the largest animal in the community.
Two students are given cubic boxes, measuring 10 cm on a side. Robert puts a single glass marble with a
diameter of 10 cm in the box. Susan puts 1,000 1-cm glass marbles in her box.
1. Whose box has more empty space? Explain.
Answer:
Both boxes have the same amount of empty space
Explanation:
Given
Cube Box
[tex]Length = 10cm[/tex]
Robert:
1 glass marble
[tex]Diameter = 10cm[/tex]
Susan:
1000 glass marble
[tex]Diameter = 1cm[/tex]
Required
Whose box has more empty space?
First, we need to calculate the volume of the cubic box.
[tex]Volume = Length^3[/tex]
Substitute 10cm for Length
[tex]Volume = 10^3[/tex]
[tex]Volume = 1000cm^3[/tex]
Next, calculate the volume of Robert's glass
Volume is calculated as:
[tex]Volume = \frac{4}{3}\pi r^3[/tex] ---- Volume of a sphere
Where
r = radius
[tex]r = \frac{1}{2} * Diameter[/tex]
[tex]Diameter = 10cm[/tex] --- Given
Substitute 10 for diameter
[tex]r = \frac{1}{2} * 10cm[/tex]
[tex]r = 5cm[/tex]
So:
[tex]Volume = \frac{4}{3}\pi r^3[/tex]
[tex]Volume = \frac{4}{3} * \frac{22}{7} * 5^3[/tex]
[tex]Volume = \frac{4}{3} * \frac{22}{7} * 125[/tex]
[tex]Volume = 523.8cm^3[/tex]
Next, we determine the volume of Susan's 1000 glasses
Volume is calculated as:
[tex]Volume = \frac{4}{3}\pi r^3[/tex] ---- Volume of a sphere
Where
r = radius
[tex]r = \frac{1}{2} * Diameter[/tex]
[tex]Diameter = 1cm[/tex] --- Given
Substitute 1cm for diameter
[tex]r = \frac{1}{2} * 1cm[/tex]
[tex]r = 0.5cm[/tex]
Substitute 0.5cm for radius in [tex]Volume = \frac{4}{3}\pi r^3[/tex]
[tex]Volume = \frac{4}{3} * \frac{22}{7} * 0.5^3[/tex]
[tex]Volume = \frac{4}{3} * \frac{22}{7} * 0.125[/tex]
[tex]Volume = 0.5238[/tex]
But there are 1000 glasses.
So, the volume of 1000 glasses is:
[tex]Volume = 0.5238 * 1000[/tex]
[tex]Volume = 523.8cm^3[/tex]
--------------------------------------------------------------------------------------------------------------
For Robert:
[tex]Volume = 523.8cm^3[/tex]
For Susan:
[tex]Volume = 523.8cm^3[/tex]
Since, they have the same volume.
Both boxes have the same amount of empty space
From the dimensions of glass marble for robert and susan, we can say that; none of the given boxes have more empty space.
We are told that the cubic boxes have a measure of 10 cm for its' sides.
Formula for volume of a cube is;
V = lwh
where;
l is length
w is width
h is height
Thus; V = 10 × 10 × 10
V = 1000 cm³
For Robert;
We are told that he puts a glass marble with a diameter of 10 cm in the box. The glass is usually spherical in shape and the volume of a sphere is;
V = ⁴/₃πr³
Thus;
V_rob = ⁴/₃π × (10/2)³
V_rob = 523.6 cm³
Volume left for rob = 1000 - 523.6
Volume of empty space left for rob = 476.4 cm³
For Susan;
V = ⁴/₃πr³
Thus;
V_sus = ⁴/₃π × (1/2)³ × 1000
V_sus = 523.6 cm³
Volume left for susan = 1000 - 523.6
Volume of empty space left for susan = 476.4 cm³
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Describe the path that energy takes, from solar energy reaching earths surface to energy used to power cell processes in animals
The path that energy takes, from solar energy reaching the earth's surface to energy used to power cell processes in animals - Animals eat the grass that captures the energy from the sun which gives the animal nutrients
The Sun is the primary source of energy for organisms and the ecosystems of which they are part.
Producers, such as plants and algae, get their energy from sunlight to make food energy by combining carbon dioxide and water to form organic matter.This process begins the flow of energy through almost all food webs.The energy present in these photosynthetic organisms store then transferred to various animals when they feed on these plants and algae and get their food and energy.Thus, the correct answer would be - Animals eat the grass that captures the energy from the sun which gives the animal nutrients
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In 20 words or fewer, what science questions would you ask about the video?
Answer:
What is the video about? Who came up within the Concept
Explanation:
why must controlled fires be set in some ecosystems? what are some advantages and disadvantages?
Answer:well dry areas could catch fire and become out of hand or some plants may be harmed due to smoke
advantages:trimming area and making room
disadnstages:possible forest fire,harms plants,ruins animals homes
Explanation:
Plz Help! Will Name Brainliest!!
Gizmo:
Observe: Select Add, and then click in the center of the landscape exactly four times. Click Horizontal view and use the Zoom in tool to magnify the landscape.
A.
What feature have you created?
B.
Look at each contour line on the horizontal view at left. What do you notice?
Answer:
answer a is trash answer b add a vertical line
Explanation:
what creates the bubble like film on the surface of water
Answer:
Surface tension
Explanation:
Believe it or not, ____________ within an ecosystem is NOT transferred back and forth between all levels. Energy begins with the ____________ and flows in ____ direction to ____________, to ____________, and, finally, to ____________.
Answer:
Energy
Sun
One
producers
Consumers
Decomposers
Explanation:
Believe it or not, __Energy__ within an ecosystem is NOT transferred back and forth between all levels. Energy begins with the __Sun__ and flows in __One__ direction to _producers_, to _Consumers_, and, finally, to _Decomposers_.
You have isolated and purified a new species of cells from the rain forest and you want to place this new species in the appropriate branch of the tree of life. You sequence the ribosomal RNA genes from these cells and discover that for one particular region of the ribosomal gene (the rRNA) the RNA sequence is AAUGAAGG. You have sequences from the same region of the ribosomal genes (the rRNA) from each of these species: bacteria, eukaryote and archaea, which are listed below.
bacteria AUAGAUGG
eukaryote AAAGAAGG
archaea AAUGGAGU
Based on these sequence results, to which branch of the tree of life should you assign this new species?
a. eukaryote
b. archaea
c. bacterial
d. bacteria and archaea
e. There is not enough information.
Answer:
The correct answer is: option A. eukaryote.
Explanation:
The sequence of the newly found rRNA is AAUGAAGG is similar to the sequence is given for the eukaryote which is AAAGAAGG, there is only one exception at 3thirs position of the sequence which is instead of uracil there is adenosine. However, this could be a result of the transversion mutation where A converted into U of the period of evolution.
On the other hand, the rRNA of bacteria and archaea have a very high difference in their sequence with a change in one than one base.
Gymnosperms are classified as which of the following?
O Vascular
Non-vascular
Monocot
Dicot
Answer:
D. Dicot
Explanation:
...... .............. ..
29
30
5.5. The smallest cell in the world is:
Answer:
Mycoplasma
Explanation:
It is about 10 micrometers in size.
Clostridium Difficile (C. difficile) is a type of bacteria that increases its activity with most antibiotic use, and is therefore very difficult to treat. Research shows that the most effective way to prevent the spread of infection is frequent handwashing. However, many people have flat-out refused to wash their hands in hospitals. The government is contemplating passing a policy to make it mandatory for people entering hospitals to wash their hands or else risk not being seen by doctors and being escorted out of the building against their will. Do you think the government should go ahead with this plan?
Consider and discuss the legal, ethical or practical problems that exist for each action option and conclude with a persuasive argument supporting your decision.
Answer:
The government should not go ahead with this plan.
Explanation:
If the government decides to proceed with its plan to pass a law that authorizes the management of a hospital to force people who refuse to wash their hands out of a hospital and deny them medical care against their will, then the government will be infringing on people's right to life. While it is necessary to prevent the spread of Clostridium Difficile (C. difficile) , any law that is made to that effect must not abuse the right of access to medical care which is a fundamental right of citizens. This action will be ethically incorrect because it amounts to a government using a high handed approach in discharging its duties.
However, the intention of such a law is to protect the citizenry from the bacteria Clostridium Difficile (C. difficile) . If such a law is not passed, more people may become infected by the bacteria owing to the carelessness of other people. This situation is made worse because the organism is resistant to antibiotics.
However, since prevention of the spread of Clostridium Difficile (C. difficile) is Paramount, I opine that the government should continue to enlighten citizens and appeal to them on the need to practice regular hand washing in order to protect themselves and other people. Passing the said law is a draconian approach to the problem hence it is not in line with the ethics of modern civilization.
It is more civil to continue to appeal to citizens and sensitize them on the importance of regular hand washing as it affects the spread of Clostridium Difficile (C. difficile) .
I NEED ANWERS ASAP!!!When you view the pendulum’s swing, it shows that at the very top of the swing KE = 0. What does that tell you about the pendulum’s motion at that point?
Answer:
If KE = 0, the pendulum is not moving. At the top of the swing, the pendulum must stop for a brief moment.
Explanation:
Answer:
If KE = 0, the pendulum is not moving. At the top of the swing, the pendulum must stop for a brief moment.
Sorry I'm late but I hope this helps someone lol
Explanation:
what is the most common type of petrified remain fossils
Answer:
After an organism is buried, minerals carried by water such as silica, calcite or pyrite replace the organic material in the fossil. Some common examples are most dinosaur bones, petrified wood, and many trilobite fossils.
Answer:
The answer is wood
Explanation:
Is brown algae a plant like protist or a fungi like protist? Why?
Answer:
brown algae is seaweed
Explanation:
which is a plant
I WILL GIVE BRAINLIEST
There are two different types of cell transportation. Which of the following requires energy?
a. Facilitated Diffusion
b. Active Transport
c. Osmosis
d. Simple Diffusion
please help :))
Answer:
The type of cellular transport that requires energy is active transport (option b).
Explanation:
Active transport —unlike passive transport— involves the passage of molecules or substances through the membrane against a concentration gradient, a process that requires the use of energy.
In the case of active transport the energy for the process comes from the ATP molecule and the mechanism for this to be possible is by means of an ATPase incorporated into the transporter.
The transport of glucose and the sodium-potassium and calcium pumps are examples of this type of transport.
The other options are not correct because simple diffusion, facilitated diffusion and osmosis are passive transport mechanisms that do not require the use of energy.
A rock rests completely still at the top edge of a tall cliff. The rock has - () 17 points
no kinetic energy of potential energy
a lot of kinetic energy but no potential energy
a lot of potential energy but no kinetic energy
both kinetic energy and potential energy
Marine biology I need this as fast as you can please and thank you. 20 points.
Formerly classified under algae, (*blank*) are a group of organisms that biologists now place under kingdom (*blank*). Many species of this group perform the important role of making an essential nutrient available to other organisms and are therefore called (*blank*).
Answer:
Formerly classified under algae, Protista are a group of organisms that biologists now place under kingdom Plantae. Many species of this group perform the important role of making an essential nutrient available to other organisms and are therefore called autotrophs/producers.
Explanation:
The first and second blanks are the right answers, but the third blank could be autotrophs or producers.guys pls help...who are the energy forms in biology pls a have an project
Answer:
electrical energy, light energy, mechanical energy, and heat energy? or maybe Kinetic, potential, and chemical energy
Explanation:
Since the initial acceptance of cell theory, recent advances in biotechnology have provided scientists with far more information about the structure and function of cells. How has the discovery of DNA and our current understanding of the cell cycle affected cell theory?
A. Cell theory was rejected after new evidence showed that DNA contains hereditary information.
B. Cell theory was elevated to a scientific law.
C. Cell theory was expanded to include new components.
D. Cell theory was replaced by a new theory that includes viruses as basic units of life.
Answer:
c
Explanation:
can't be a because
the cell theory is still around it was not rejected nor can it be b because Cell theory is a theory, not a law because the cell theory does not have enough support to become a law. nor can it be d bc its still around it was not replaced. c makes the most sense bc The expanded version of the cell theory can also include: Cells carry genetic material passed to daughter cells during cellular division. All cells are essentially the same in chemical composition. Energy flow (metabolism and biochemistry) occurs within cells. hope i helped
NaCl dissociates into 2 particles in water Na and Cl. If the solution in question 4 contained 0. IM NaCl instead of 0.IM sucrose, what is the of the solution, and in which direction would the net flow of water be?
Answer:
-4.87 (see image for further explanation)
Explanation:
Water potential of solution will be − 4.87 The direction of water potential will be out of root into salt solution.
What is water potential?ψ = iCRT
Where, i = −2,
T = 273+ 20
R= 0.831
ψ = ( −2 ) ( 1) (0.831) ( 273+ 20)
= − 4.87bars
Water potential of a substance is equal to pressure
Ψ = ΨS + ΨP
Ψ = 0 + ( 4.87)
= − 4.87bars
Therefore, Water potential of solution will be − 4.87 The direction of water potential will be out of root into salt solution.
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Your body always needs energy. What do you use first, second, and third for energy?
Answer:
eat drink water take a shower take a walk
Answer:
first: glucose
second: starches
third: fats
Explanation:
Help please lollll .
Answer:
the answer is an organ system
Explanation:
how can drip irrigation be useful in farming
Answer: It helps control the water better and more efficiently. It also helps to save water
Explanation:
what do you think causes different phenotypes in organisms how does the phenotype depend on its genes (genotype)
Answer:
They difference in phenotypes is dependent on the genes. The more dominant gene will overpower a recessive gene, or if there are two recessive genes together, that will be the phenotype. When things are cross breaded they introduce different genotypes that allow for different looking phenotypes.
Example: Dominant blue flower (Bb) mixed with recessive yellow flower (bb)
B b
b Bb bb
b Bb bb
There is a 50/50 chance the offspring will be either blue or yellow
The differences in phenotypes are determined by genes. The more dominant gene will completely overwhelm a recessive gene, or if two recessive genes coexist, the phenotype will be that. When things are crossbred, unique genotypes are introduced, allowing for different-looking phenotypes.
What is phenotype?A "phenotype" is simply an observable trait. "Pheno" simply means "observe," and it derives from the same root as "phenomenon."
The differences in phenotypes are determined by genes. The more dominant gene will completely overwhelm a recessive gene, or if two recessive genes coexist, the phenotype will be that.
When things are crossbred, unique genotypes are introduced, allowing for different-looking phenotypes.
Thus, in this way, phenotype is dependent on genotype of the organism.
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What is unique about the
protein channels which allow molecules to travel by facilitated diffusion?
A. Each channel only allows one type of molecule to pass through it
B. The channel modify the molecules DNA as they pass-through
C. The channels move molecules very quickly
Please help!!!! 10 points
Answer:
A. Each channel only allows one type of molecule to pass through it
Explanation:
Transmembrane proteins from channels spanning the membrane that create hydrophilic tunnels. They only enable diffusion across the protein channel into the cell, for their target molecules.
These are highly specific-they only allow one type or group of related molecules to use the channel. These are types of transmembrane channels, embedded within the membrane, help to maintain selective permeability, while simple diffusion of other small, uncharged molecules can readily occur.
the following in NOT a component of a prokaryotic cell
a. nucleus
b. ribosomes
c. cell wall
d. flagella
The Earth remained a frozen snow ball until carbon dioxide levels in the atmosphere increased. Why did carbon dioxide from the volcanoes fill the atmosphere?
Answer:
Because the land surface was then largely covered in ice, continental weathering effectively ceased. This locked the planet into a 'Snowball Earth' state until carbon dioxide released from ongoing volcanic activity warmed the atmosphere sufficiently to rapidly melt the ice cover. This model does not, however, explain one of the most puzzling features of this rapid deglaciation; namely the global formation of hundreds of metres thick deposits known as 'cap carbonates', in warm waters after Snowball Earth events.
The Southampton-led research, published in Nature Geoscience, now offers an explanation for these major changes in ocean chemistry.
Lead author of the study Dr Tom Gernon, Lecturer in Earth Science at the University of Southampton, said: "When volcanic material is deposited in the oceans it undergoes very rapid and profound chemical alteration that impacts the biogeochemistry of the oceans. We find that many geological and geochemical phenomena associated with Snowball Earth are consistent with extensive submarine volcanism along shallo
Explanation: