Answer:
A prokaryotic cell does not have a nuclues
Explanation:
how i remember it is pro=no(no nucleus)
and a eukaryotic cell you just remember of yourself
what is the G1 phase of mitosis and what happens during this phase?
actually environmental science own words please need it now.
Answer:
G1 is an intermediate phase occupying the time between the end of cell division in mitosis and the beginning of DNA replication during S phase. In G1, cells accomplish most of their growth; they get bigger in size and make proteins and organelles needed for normal functions of DNA synthesis. Here, proteins and RNAs are synthesized, and, more especially the centromere and the other components of the centrosomes are made.
Explanation:
Penny writes a word equation to describe photosynthesis. Which of the following is correct?
A Carbon dioxide and water combine and produce sugar and oxygen.
Nitrogen and carbon dioxide combine and produce oxygen and sugar.
Oxygen and sugar combine and produce nitrogen and carbon dioxide.
Sugar and oxygen combine and produce carbon dioxide and water.
Carbon dioxide + water -> glucose and oxygen
So, the answer would he 'A carbon dioxide and water combine and produce sugar and oxygen'.
Hope this helps! :)
Which is one benefit that mangrove trees provide to surrounding coastal wetlands?
If I'm not mistaken, the Mangrove Trees filter the water for small sharks, manatees, fish, and other animals and plants living in the murky area.
Answer:
They hold solid in place
Explanation:
Just took it
_CH, + __ 02 → _ CO2 +.
H2O
Answer:
combustion reaction
The Fluid that surrounds the organelles is....
chloroplast
vaculoe
cytoplasm
cell wall
A cell and it's environment have the same amount of dissolved solute. Both solutions are hypertonic
True
False
A student incorrectly measured the volume of a mineral sample as 83 cubic centimeters when
the actual volume was 89 cubic centimeters. What was the student's approximate percent
deviation (percentage of error)?
1.
6.7%
2.
7.2%
3.
9.3%
4.
14.8%
Answer:
1. 6.7%
hope it helps <3
The percentage deviation in the student's calculation is 6.74%.
We have a student who incorrectly measured the volume of a mineral sample.
We have to determine student's approximate percent deviation.
How to calculate the Percentage deviation ?In order to calculate percent deviation , subtract the true value from the measured value, then divide by the true value, then multiply by 100.
According to the question -
Measured volume (M) = 83 cubic centimeters.
Actual Volume (A) = 89 cubic centimeters.
ΔV or [tex]$\delta[/tex]V = M - A = 83 - 89 = - 6
Therefore -
|Percentage deviation| = [tex]\frac{\delta V}{A} \times 100[/tex] = - ( [tex]\frac{6}{89} \times 100[/tex]) = - 6.74 % = 6.74%
Hence, the percentage deviation in the student's calculation is 6.74%.
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Cells have genes that affect cell division. These genes may be damaged by
environmental factors such as radiation, smoking, and viral infections. Oncogenes
stimulate rapid cell division and are normally turned off in adult organisms. Tumor
suppressor genes prevent continuous cell division and are normally turned on in
adult organisms. One of these tumor suppressor genes, called p53, can be turned off
by the effects of smoking tobacco. Based on the above information, what is the most likely result of turning off p53?
A Lungs become black from smoking
B Cells undergo uncontrolled division
C White blood cells are unable to stop infections
D. DNA chains are broken and form more chromosomes
Answer:
B.
Explanation:
A tumor is essentially when damaged cells continue multiplying. So by smoking your risking both damaging your cells and turning of the p53 gene.
can i have brainliest?
The most likely result of turning off p53 is cells undergo uncontrolled division. Hence option B is correct.
What are genes?Genes are defined as the fundamental genetic component transferred from parent to child. Genes are composed of DNA sequences and are organized sequentially at specified sites on chromosomes in the cell nucleus. The foundation of the body is made up of cells. Your body is made up of billions of interconnected cells in every part. Chromosomes are the units on which genes are organized.
Diseases like cancer can result from an alteration in the cell cycle's regular regulation. When the cell cycle is out of balance, cells have the potential to randomly divide and accumulate genetic errors that can cause a malignant tumor.
Thus, the most likely result of turning off p53 is cells undergo uncontrolled division. Hence option B is correct.
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6. Why is water useful to cells?
13. A discount retail store gives a 8% discount
to senior citizens. If a customer who is a senior
citizen wants to purchase an item that costs
$34.50, what is the final cost after the discount
is applied?
Answer:$31.74
Explanation:
Discribe the structure of paramecium
Answer:
they are single celled protist, most commonly found in aquatic habitats.Certain paramecia are also easily cultured in labs and serve as useful model organisms.they are usually oblong or round.
Explanation:
Dead zones are low-oxygen areas that develop on the seafloor. Scientists hypothesize that phytoplankton blooms cause these dead zones. Phytoplankton blooms occur when excess nutrients are introduced by pollution from fertilizers, sewage plants, and the burning of fossil fuels. Which of the following would most likely cause an increase in these contributors to dead zones?
Answer:
Rainfall patterns that increase freshwater runoff from terrestrial ecosystems.
Shahzadi is looking at a cell with an electron microscope. She estimates that the cell is 2 x 10-5 metres long. What is this number fully written
out?
The length of the cell when the number is fully written is twenty millionth meters long.
Given that the length of the cell is 2 x 10⁻⁵ meters long.
1 millionth = 0.000001 = 10⁻⁶
The length of the cell = 2 x 10⁻⁵ meters = 20 * 10⁻⁶ meters
Therefore the length of the cell when the number is fully written is twenty millionth meters long.
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How many kilometers are equal to 1 light year
Answer:
9.461e+12
Explanation:
Answer:
i think 9.461e+12
Which type of mutation adds one or more base pairs?
Answer:
Insertions
Explanation:
Because they are mutations that use extra base pairs and insert them into a new place for the DNA, when a section of DNA is lost, A insertion fills it in.
loria’s doctor diagnoses her with hepatitis B, which is a viral infection. Which body system will fight this infection?
A.
respiratory
B.
integumentary
C.
immune
D.
digestive
E.
circulatory
Answer:cccc
Explanation:
Roseanne has grown a few green chilli plants in her backyard. Is she growing a crop? Give reasons for your answer
Answer:
I do not think she is growing a crop.
Explanation:
A crop generally means a huge amount of a type of food. Corn, Soy, Bananas, ETC. She is merely tending a garden not a big crop like a whole cornfield.
Roseanne has grown a few different green chilli plants in her backyard. She is not growing a crop.
What is a Crop?A crop is a plant which can be grown and can also be harvested extensively for the purpose of profit or subsistence. When the different plants of the same kind are cultivated at one place on a very large scale, it is called as a crop. Most crops cultivated in agriculture or hydroponics.
Green chillies are the plants which need a warm, sunny spot for the best results. Ideally, green chillies grow in a greenhouse or can be raised in the pots on a south-facing patio or windowsill.
Roseanne has grown a few green chilli plants in her backyard. She is not growing a crop as it is not a wide scale production of the plant.
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2. Use evidence from the diagrams of macromolecules and information provided earlier to revise your explanation about whether sugar molecules provide all the elements needed to make the four types of macromolecules.
Answer:
No - they do not contain nitrogen which is needed to make proteins and nucleic acids (sometimes lipids)
Explanation:
The four types of macromolecules are carbohydrates, lipids, proteins, and nucleic acids.
Sugars are carbohydrates, and contain carbon, hydrogen, and oxygen.
Lipids contain carbon, hydrogen, and oxygen, and sometimes other elements like nitrogen and phodphorus.
Proteins contain carbon, hydrogen, oxygen and nitrogen.
Nucleic acids contain carbon, hydrogen, oxygen, nitrogen, and phosphorous
Use the image to complete the statements.
The aluminum atom
electrons to form an ion.
The ion that is formed is
Aluminum atom
Aluminum ion
Answer:
Loses
Positive
Explanation:did it on edge
Answer:
loses, and positive.
Explanation:
What factors challenge the stability of an organism?i
Answer:
Abiotic factors.
Explanation:
Abiotic factors such as temperature and humidity etc challenge the stability of an organism by providing the harsh environment. This harsh environment disturbs the stability of the organism. Increase in temperature and very less or high humidity imbalance the enzyme activity which disturbs the whole functioning of the body of organism. So for chemical processes in the body, suitable temperature is required.
Notice the progression of the green and blue dots over time. What statements below describe what is happening
Answer:
The blue and green molecules are small and polar and can diffuse through the lipid bilayer
Explanation:
The plasma membrane is made up of a double layer of phospholipids. This arrangement permits the movement of small polar molecules by diffusion. However, larger molecules or ions need to pass through membrane channels or be carried over by active transport.
What is the scientific name for a polar bear
Answer:Ursus maritimus
Explanation:
the scientific name for a polar bear is called Ursus maritimus
Answer:
Ursus arctos
Explanation:
Define Hydrophilic. Which part of the membrane is
hydrophilic?
Answer:
Cell Membranes
Phospholipids are amphiphilic, meaning they are both attracted to water in one region of the molecule, and repel water in other regions. The head of the phospholipid molecule is the hydrophilic region. The tails are the hydrophobic region, and point inward, toward each other.
Explanation:
Answer:
The phospholipids in the plasma membrane are arranged in two layers, called a phospholipid bilayer. As shown in the diagram below, each phospholipid molecule has a head and two tails. The head “loves” water (hydrophilic) and the tails “fear” water (hydrophobic).
how come human populations differ from other animal populations
Answer:
Animal species come in many shapes and sizes, as do the individuals and populations that make up each species. To us, humans might seem to show particularly high levels of morphological variation, but perhaps this perception is simply based on enhanced recognition of individual conspecifics relative to individual heterospecifics. We here more objectively ask how humans compare to other animals ...
Explanation:
With in population, humans show low levels body height variation in comparison to variation observed in other animal population.
Similarly, human population does not show distinctive levels of body mass variation.
What are the importance of studying human population?The study of population helps us to understand the process that influence the size, growth, characteristics, and distribution.
Population studies highlight these problems for society, administrators, political System, economic Planning
The most important terminology which is immensely studied called demography where the study of human population is extremely essential to determine the age, composition.
It is essential to study in every country by analyzing patterns of life expectancy and accurately predict the future.
Demography is important to study, as it characterize the nature population changes over time, such as the aging population
Hence, humans population show low levels body height variation in comparison to variation observed in other animal population.
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15. Why is an enzyme's shape important for the process of a chemical reaction:
Answer:
Why is shape important? The shape of an enzyme is very important because it has a direct effect on how it catalyzes a reaction. An enzyme's shape is determined by the sequence of amino acids in its structure, and the bonds which form between the atoms of those molecules.
Robinson illustrates how she and her team are using corals to learn more about the ocean’s composition long ago. Briefly summarize what Robinson details about ancient ocean feedbacks.
Answer:
Robinson explains how she uses layers in fossilized corals to understand what the environment was like overtime. By finding out what mainly makes up each layer and finding out roughly how old each layer is, she can begin to understand what the chemical composition and climate was like when the coral pieces were alive
Which of the following is a characteristic of science
Answer:
science tries to understand what we can see and give a reason for it
Explanation:
Explain in your own words how the Cell Theory is an example of a scientific theory.
Explanation:
Cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells. Cells are the basic unit of structure in all organisms and also the basic unit of reproduction.
Hope this works
Which of the following is the best example of an open system?
A. a vacuum bottle
B.An Anthill
C. A sealed Box
D.The moon
Answer:
B.) An anthill
Explanation:
trust me
A student performs an experiment to study the transport of water in and out of cells. He uses clear, semi-permeable plastic bags to represent the cell membrane. The student places three plastic bags of the same size, each containing a 1% concentration sucrose solution, into three different beakers. One beaker contains distilled water, another beaker contains a 3% concentration sucrose solution, and the third beaker contains a 1% concentratIon sucrose solution. The diagram shows the students experimental setup, the plastic bag before it is placed in the beakers, and the appearance of the bags after an hour in each solution. Which statement provides a conclusion about the transport of water in and out of cells based on the results of the students experiment?
Answer:
B
Explanation:
A. Water moves freely both inside and outside the cell independent of the solute concentration.
B. Water movement into the cell is dependent on the percent concentration of solutes both inside and outside the cell.
C. Water transports solutes out of the cell to balance the percent concentration of solutes both inside and outside the cell.
D. Water moves into the cell solutes move out of the cell to ensure their concentration is balanced both inside and outside the cell.
The correct statement that provides a conclusion about the transport of water in and out of the cells is that water movement into the cell is dependent on the percent concentration of solutes both inside and outside the cell.
Water molecules will always move from the region of higher water potential to the region of lower water potential. The more the solute concentration of a solution, the lower the water potential compared to a solution with a lower solute concentration.
Hence, water will move from the beaker containing distilled water into the plastic bag containing a 1% sucrose solution until an equilibrium is established - the solution in the beaker is hypotonic to the one in the bag.
On the contrary, water will move from the bag containing 1% sucrose solution into the beaker containing 3% sucrose solution until there is no longer any net movement of water - the solution in the beaker is hypertonic to the one in the bag.
There will not be any movement of water from the bag to the beaker containing 1% sucrose because both solutions are of the same concentration, that is, isotonic.
The correct option is B