Melinda had two slides of unknown cells. She recorded her observations of each one on the chart below.
According to the information in the given chart, what type of cell is cell X?
a
prokaryotic cell
b
bacteria cell
c
animal cell
d
plant cell
Answers
Answer:
According to the information given by Melinda on the chart, about the observed cells, cell X is an animal cell.
Explanation:
Animal cells are eukaryotic cells, with the ability to differentiate and unite to form tissues.
An animal cell contains elements such as a cell membrane, cytoplasm, nucleus and organelles —including mitochondria— by which it can be identified and differentiated from other cell types.
An important feature of animal cells is the existence of cytoplasmic compartments that form the endomebrane system, in relation to the cytoplasmic membrane and organelles.
The other options are not possible because:
Bacterial and prokaryotic cells lack nuclei and organelles. Plant cells possess chloroplasts and cell wall, as described for the Y cell.Related Questions
The timing of _____ is a feature that distinguishes cam and c4 photosynthesis.
Answers
Answer:
stomatal opening
Explanation:
Consider the following two statements about DNA melting temperature:
1) The melting temperature of a sample of DNA is the temperature at which 50% of the double helices in the sample have completely denatured.
2) A molecule with 53% GC base pairs would have a higher melting temperature than a molecule of equivalent length with 53% AT base pairs.
Determine which one of the statements below is CORRECT.
A. Statement 1) and statement 2) are false.
B. Statement 1) and statement 2) are true.
C. Statement 1) is true; statement 2) is false.
D. Statement 1) is false; statement 2) is true.
Answers
Given what we know, we can confirm that statement 1 is false, while statement 2 is in fact true. Option D is correct.
Why is statement 1 false and 2 is true?Statement 1 states that the melting point of DNA is determined by the denaturalization of 50% of the double helices in the sample. This is not the case, since the DNA melting point is when 50% of the sample becomes single-standard DNA. Statement 2 is true in that a higher concentration of GC base pairs leads to a higher melting point for DNA.
Therefore, we can confirm that statement 1 is false, while statement 2 is in fact true. Option D is correct.
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Match each term with its description.
Match Term Definition
Biosphere A) A large geographical area classified by its climate and the plant and animal life within it
Ecosystem B) Includes all living things functioning together with the physical factors of their environment
Biome C) A place in an ecosystem where an organism normally lives
Habitat D) Includes all living things and the areas in which they live
Answers
Ecosystem had all living things functioning together with the physical factors of their environment
Biome A place in an ecosystem where an organism normally lives
Dna provides the instructions for making what type of macromolecule?.
Answers
Answer:
Protiens
Explanation:
DNA's instructions are used to make proteins in a two-step process. First, enzymes read the information in a DNA molecule and transcribe it into an intermediary molecule called messenger ribonucleic acid, or mRNA.
Where would you find the warmest waters?
deep zone
surface-mixed zone
transition zone
polar zone
Answers
Answer:
Surface Mixed Zone, because the warmest is at the surface so it'll get the most sunlight. etc. It *stays* the warmest because warm water is less dense than cool water. Layers in the ocean are very well-defined since the warm water on top will stay warm and the cold water stays cold.
Explanation:
Hope my answer helped :)
Select all the correct answers.
Why are invasive species considered a threat to native wildlife. A they can breed and spread quickly. B they consume native species food supply. C they evolve and native species don’t. D they all have higher genetic diversity than native species. E they don’t need resources from the environment at native species do.
Answers
Answer:
The answers A and B.
Explanation:
Ionic bonds are formed when when one or more electrons are transferred from one atom to another
true or false
Answers
PLEASE HELP!!
Match how far back in the earth's climate history we can learn about from each proxy.
Clam shells
Ice cores
World's oldest rocks
Tree cores
Ocean sediments
1. 150 million years ago
2. 800,000 years ago
3. 10,000 years ago
4. 200 million years ago
5. 3.8 billion years ago
Answers
These changes can be natural, such as through variations in the solar cycle.
Climate historyClam shells
2. 800,000 years ago
Ice cores
1. 150 million years ago
Oldest rocks in the world
5. 3.8 billion years ago
Tree cores
3. 10,000 years ago
Ocean sediments
4. 200 million years ago
With this information we can conclude that these changes may be natural, such as through variations in the solar cycle. But since 1800, human activities have been the main driver of climate change, mainly due to the burning of fossil fuels like coal, oil and gas.
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Cells (A) and (F) show an early and a late stage of the same phase of mitosis. What phase is it?
Answers
Answer: (Note: You will find the stages in the attached files)
The phase is PROPHASE. Cell A is in early prophase, while cell F is in late prophase.
Explanation:
The prophase might be divided into early prophase and late prophase.
Early-Prophase: The chromatin is condensed enough to distinguish individual chromosomes. There are also two pares of centrioles located outside the nucleus. They begin the separation from each other, migrating to the opposite poles. The microtubules extend and originate the polar fibers of the mitotic spindle. By this time, nucleoles have already disappeared. In the A cell, you can see the condensing chromatin and the centrioles migrating to the poles, but not there yet. You can also see the intact nuclear membrane and no nucleole. Late-Prophase: The nuclear membrane breaks and disperses. Chromosomes keep condensing until they are completely condensed and in direct contact with the cytoplasm. Each pair of centrosomes is already in the cell poles, and the polar fibers of the mitotic spindle are completely developed, as well as the kinetochore fibers. In the F cell, you can see centrioles in the poles and the noticeable mitotic spindle. You can also see the nuclear membrane broken into many pieces and the chromosomes that are completely condensed.Cell A is at the beginning of prophase, while cell F is at the end of prophase.
We can arrive at this answer as follows:
In cell A, we can see that the chromatin has gone through a strong process of condensation, to the point where we can see the individual chromosomes. This is an intrinsic feature of the beginning of the prophase.Furthermore, the nuclear membrane is still visible in cell A, which is also a characteristic of prophase.In the cell F, we can see the disintegration of the nuclear membrane, the condensation of chromosomes, and the contact of chromosomes with the cytoplasm. This is a characteristic of the end of prophase, where a new phase of the cell cycle will begin.In this cell, it is also possible to see the mitotic spindle and the existence of centrioles at the poles, which is also a characteristic of the end of prophase.You have not shown the picture your question refers to. However, it is possible to find it in questions similar to yours.
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CELL TRANSPORT: Describe how a large protein and an oxygen molecule will
enter or leave a cell, HINT they do not use the same transport method.
Answers
Answer:
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ).
It is possible for large molecules to enter a cell by a process called endocytosis, where a small piece of the cell membrane wraps around the particle and is brought into the cell. If the particle is solid, endocytosis is also called phagocytosis. If fluid droplets are taken in, the processes is called pinocytosis.
Carbon has an atomic number of 6. Carbon 14 has _____.
Answers
Answer:
8 Neutrons
Explanation:
For example, carbon has six protons and is atomic number 6. Carbon occurs naturally in three isotopes: carbon 12, which has 6 neutrons (plus 6 protons equals 12), carbon 13, which has 7 neutrons, and carbon 14, which has 8 neutrons.
{100 POINTS!}
Which of the following is not an example of a marine producer?
A. Cyanobacteria capable of photosynthesis
B. Bacteria that carry out decomposition
C. Phytoplankton
D. Chemosynthetic Archaea
Answers
Answer:
B. Bacteria that carry out decomposition
Explanation:
This is your answer because these don't produce anything. These are things that don't produce their own food, but they eat something else. One example on land can be Mushrooms.
So hence, your answer is only B. Bacteria that carry out decompositon
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The name of the cell is determined by the name of the row and the column intersecting, such as A8.
O cell
O cell grid
O cell address
O cell directory
Answers
I believe the answer would be the cell address.
Hope that helped!
Answer:
I know im late but cell adress
Explanation: I took the test
How do viruses reproduce?
a. They divide by mitosis
b. Sexually, by external fertilization
C. Replication outside the host
d. Inserting DNA into the host cell
Answers
Answer:
D
Explanation:
Answer: D
Inserting DNA into the host cell
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Describe what has happened to the effectiveness of the insecticide by the end of the spray program, not the population of mosquitoes.
Answers
The effectiveness of insecticide by the end of the spray program would have decreased.
What is an Insecticide?This is a chemical substance specially prepared to kill insects such as mosquito, fly etc.
These insects develop resistance to this chemical with time which thereby leads to a decrease in its effectiveness.
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What are three ways to conserve resources?
Answers
Answer:
Proper utilization of resources and saving them for the future generations is known as resource conservation. Reduce, recycle and reuse are the three common ways to conserve resources.That's my correct answer8. Which of these is a homogeneous mixture?
A. O milk
B. O tea
C. O sand on a beach
D. O sodium chloride
Answers
Explanation:
A. milk is my answer
Por qué cuando los niños son vacunados presentan síntomas de fiebre?
Answers
Answer:
Por lo tanto, el sistema inmunológico puede manejar la obtención de vacunas para desarrollar inmunidad a las enfermedades y combatir enfermedades menores al mismo tiempo. Las vacunas no empeoran los síntomas de la enfermedad, aunque pueden causar efectos secundarios leves, como fiebre leve o dolor o hinchazón en el lugar donde se aplicó la inyección.
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Question: A scientist looking at animal fossils from 400 million years ago might see the first appearance of which organism?
A. insects
B. amphibians
C. jellies
D. land plants
Answers
Answer:
B. amphibians
(B) Amphibians
what do fossil fuels hold, what kind of energy do they hold, what is converted into, & what kind of energy
Answers
Answer:
Explanation: Energy gained from burning fossil fuels is converted to electricity and heat in commercial power plants. When fossil fuels are burned carbon and hydrogen react with oxygen in air to carbon dioxide (CO2) and water (H2O). During this reaction heat is released which further amplifies the reaction.
Question 19
Neurotransmitters are typically stored in which of the following parts of a neuron?
Answers
Answer:
Neurotransmitters are synthesized by neurons and are stored in vesicles, which typically are located in the axon ’s terminal end, also known as the presynaptic terminal. The presynaptic terminal is separated from the neuron or muscle or gland cell onto which it impinges by a gap called the synaptic cleft.
Explanation:
Define a hybrid fish
Answers
Answer:
Scientists accidentally bred a hybrid fish called the sturddlefish The sturddlefish is a hybrid of a sturgeon and a paddlefish, and scientists created this new creature on accident. Forward 15 seconds Back 15 seconds
Explanation:
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The ear canal is found on what bone
Answers
Explanation:
ear bone, also called Auditory Ossicle, any of the three tiny bones in the middle ear of all mammals. These are the malleus, or hammer, the incus, or anvil, and the stapes, or stirrup.
Answer:
the temporal bone
Explanation:
hope it helps sorry if I'm wrong
The biomolecule described as having many high energy bonds, majority of the cell membrane,
and has more energy per gram than other biomolecules is a
aCarbohydrate
b. Glycerol
C. Fatty acids
d. Amino acids
Answers
What causes burning rock and gas to explode out of a volcano?
Answers
Answer:
the first one
Explanation:
А_________ is any object that orbits a larger object
Answers
Answer:
The answer is satellite, give me brainliest answer pls:)
Answer:
An object that moves around another object in space is a
A natural satellite of a planet or asteroid. objects that orbit around a body in space that are not man made. ex. the earth is a natural satellite of the Sun, the moon is a natural satellite of Earth.
Explanation:
The model shows a nucleic acid. Which is one function of the nucleic acid? It helps code for proteins. it help synthesize DNA It provides energy to the cell.. It helps synthesize DNA. It helps synthesize DNA. It is a major component of the cell membrane. It is a major component of the cell membrane.
Answers
Answer:
The correct answer is - It helps code for proteins.
Explanation:
Nucleic acids are biomolecules that are essential for all life forms, they are of two major types RNA and DNA. In RNA the sugar is ribose whereas in DA deoxyribose sugar is present.
Nucleic acids are helpful in protein synthesis in both types of cells and all organisms. These biomolecule codes for the protein and makes the polypeptide chain made up of amino acids with the help of mRNA and tRNA with ribosomes.
Which step occurs when RNA polymerase attaches to the promoter DNA? termination of the RNA molecule elongation of the growing RNA molecule initiation of a new polypeptide chain initiation of a new RNA molecule
Answers
Initiation of a new RNA molecule is the step that occurs when RNA polymerase attaches to the promoter DNA (Option D).
What is the RNA polymerase enzyme?RNA polymerase is an enzyme used to synthesize RNA during a cellular process called transcription, which first required the binding of this protein with a specific region of the DNA gene sequence called promoter.
Therefore, with this data, we can see that the RNA polymerase is an enzyme that binds to the DNA gene sequence in order to initiate the cell process of transcription.
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A woman has only daughters. Analyze the situation genetically and provide a suitable explanation.
Answers
Answer:
If a woman has only daughters then the father must have passed the X chromosome that fertilised the egg each time
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What can an
ophthalmologist do that an optometrist cannot?
A.examine eyes
B.prescribe eyeglasses
C.meet with patients
D. perform surgeries
Answers
Answer:
D. Perform surgeries
Explanation: