How would you demonstrate that all cells come from preexisting cells
Answer: The generally accepted parts of modern cell theory include: ... All living cells arise from pre-existing cells by division. The cell is the fundamental unit of structure and function in all living organisms. The activity of an organism depends on the total activity of independent cells.
Explanation:
To demonstrate that all cells come from pre-existing cells, you should: Observe a bacterium performing binary fission to form clones of itself.
A cell can be defined as the basic functional, structural and smallest unit of life which is found in all living organisms.
According to cell theory, the following statements are true about cells;
All living organisms comprises small structural units called cells.A cell is the fundamental (basic), functional unit of life.Every living organism is made up of one or more cells: unicellular or multicellular.All cells are produced from existing (other) cells i.e pre-existing cells produce new ones through a process called cell division.Binary fission is an asexual reproduction wherein the body of a prokaryotic organism such as bacterium, is divided into two (2) new identical bodies.
In order to demonstrate that all cells come from pre-existing cells, you should observe a bacterium performing binary fission (dividing) to form clones of itself.
In conclusion, the chromosome (pre-existing cell) of a bacterium containing deoxyribonucleic acid (DNA) and associated proteins replicates and then divides in half to form clones of itself (identical daughter cells).
Read more: https://brainly.com/question/14133091
Question 4 of 5
The box shows the element nitrogen as it appears in the
periodic table.
N
Nitrogen
14.0
Which two parts are needed to make a neutral atom of nitrogen?
O A. Electron clouds with a total of 14 electrons
I B. A nucleus with three protons and four neutrons
C. A nucleus with seven protons and seven neutrons
O D. Electron clouds with a total of seven electrons
Answer:D & C
Explanation:
5. Which of the following statements correctly identifies a way in which
prokaryotic cells are different from eukaryotic cells? *
Prokaryotic cells have flagella, while eukaryotic cells do not.
Prokaryotic cells have chloroplasts, while eukaryotic cells do not.
O
Prokaryotic cells only have free-floating DNA, while eukaryotic cells have DNA
enclosed in a nucleus.
Prokaryotic cells only have cell membranes, while eukaryotic cells have both cel
membranes and cell walls.
Answer:
I think the correct answer is the number 2
MARKING PEOPL AS BRAINLIST⚠️
Why does cell size need to be limited?
Where does the DNA come from that is in the parent cell?
Answer:
Your genome is inherited from your parents, half from your mother and half from your father. The gametes are formed during a process called meiosis. Like your genome, each gamete is unique, which explains why siblings from the same parents do not look the same.
The need to be able to pass nutrients and gases into and out of the cell sets a limit on how big cells can be. The larger a cell gets, the more difficult it is for nutrients and gases to move in and out of the cell. As a cell grows, its volume increases more quickly than its surface area.
Explanation:
The need to be able to pass nutrients and gases into and out of the cell sets a limit on how big cells can be. The larger a cell gets, the more difficult it is for nutrients and gases to move in and out of the cell. As a cell grows, its volume increases more quickly than its surface area.\
And as for the DNA, your genome is inherited from your parents, half from your mother and half from your father. The gametes are formed during a process called meiosis. Like your genome, each gamete is unique, which explains why siblings from the same parents do not look the same.
In passive transport, molecules move__ the concentration gradient.
Answer:
In passive transport, molecules move with the concentraction gradient.
Explanation:
If molecules moved against it would be active transport.
Passive transportation has been defined as the mode of molecule movement across the semi-permeable membrane. "In passive transport, molecules move down the concentration gradient."
What is passive transport?Passive transport has been the mode of movement of the ions and molecules from the exterior and interior of the cell through the plasma membrane. This mode of transportation has been characterized by the movement of the ions from the region of a higher electrochemical gradient.
The ions tend to move towards the region that lacks the electrochemical gradient, hence it is a movement in the direction of the lower concentration. The solute particles do not external source of energy to drive the movement from higher concentration areas.
It is a type of diffusion that uses the law of Thermodynamics to move the ions up and down the cell concentration. The movement of the oxygen gas in the body cells is an example of passive transportation.
Therefore, the ions move down the concentration gradient in the passive transport.
Learn more about passive transport, here:
https://brainly.com/question/13542102
#SPJ2
When two heterozygous parents are crossed (Aa x Aa), what percent of the offspring will have a dominant phenotype ?
The percent of the offspring will have a dominant phenotype is 25% or 1/4 when two heterozygous parents are crossed (Aa x Aa).
What is the percentage of a phenotype for a heterozygous genetic cross?The percentage of a phenotype for a heterozygous genetic cross is 25 percent because there are two types of gametes in the parent and the cross between one of them for each parent is 1/4.
Therefore, with this data, we can see that the percentage of a phenotype for a heterozygous genetic cross is equal to 25% due to the combination of gametes.
Learn more about heterozygous individuals here:
https://brainly.com/question/14366259
#SPJ1
Helppppp plsss I rlly need it?
Answer: C. Nucleus
Explanation:
The nucleus is a membrane-enclosed organelle, found in most eukaryotic cells, which stores the genetic material (DNA).
How do the equations help explain the role of producers in the ecosystem?
Answer:
Producers are organisms that create food from inorganic matter. The best examples of producers are plants, lichens and algae, which convert water, sunlight and carbon dioxide into carbohydrates. Consumers are organisms that cannot create their food. ... The producers are the foundation of any ecosystem.
Found this on google, hope it helps, have a great day/night and stay safe!
A hurricane sweeps across the ocean and damages the houses of people living along the coast. This is an example of interactions between the
biosphere, atmosphere, and sand
hydrosphere, sand, and biosphere
atmosphere, sand, and hydrosphere
atmosphere, hydrosphere, and biosphere
Answer:
I think its atmosphere, sand, and hydrosphere
Explanation:
good luck :)
Carbon dioxide most likely enter the cell through which of the following processes
Answer:
Simple diffusion through the membrane
Explanation:
Oxygen and carbon dioxide move across cell membranes simple diffusion, a process that requires no energy input and is driven by differences in concentration on either side of the cell membrane.
Your pet dog has 78 chromosomes in each of its body cells. How many chromosomes are in each of its sperm cells?
Answer:
the answer should be 39
Explanation:
the sperm cell has half as many chromosomes the a regular cell
Fecal coliform is an indicator of what type of disease?
Answer:
Explanation:
Some waterborne pathogenic diseases include typhoid fever, viral and bacterial gastroenteritis and hepatitis A. The presence of fecal contamination is an indicator that a potential health risk exists for individuals exposed to this water.
Answer:
Thermotolerant coliform bacteria (commonly referred as fecal coliforms) are the group most frequently used as indicators of fecal pollution because they behave in a similar way to most pathogenic bacteria in the environment, and, during treatment, they are abundant and easy to determine.
what are two compelling pieces of evidence that support the theory of evolution?
There are five lines of evidence that support evolution: the fossil record, biogeography, comparative anatomy, comparative embryology, and molecular biology.
The two compelling pieces of evidence that support the theory of evolution are the fossil record, and biogeography.
What is the theory of evolution?It is the change that attributed of the species for the various generations and believed on the natural selection process,
hence, we can conclude that The two compelling pieces of evidence that support the theory of evolution are the fossil record, and biogeography.
Learn more about evolution here: https://brainly.com/question/23183096
planting selectmaterial in low quality? please answer my question
Answer:
Whats your question
Explanation:
???
5. The role of mitosis in asexual reproduction has what effect on genetic variation?
a. It greatly increases genetic variation.
b. It limits genetic variation.
C. It prevents genetic variation from occurring.
d. It has no effect on genetic variation.
Answer: D: it has no effect on genetic variation.
Explanation:
DNA provides a very significant role in the formation and development of an organism.what is that role?
Answer:
The significant role that DNA provides is the organism's genetic information. It stores its information inside, and that's what makes up all the traits of the organism. All known cellular life contains DNA for this reason, and basically serves as long-term storage of information about the organism.
What is a gene? a single strand of DNA. the fundamental unit of heredity. a single nucleotide. the fundamental unit of DNA
Answer:
the fundamental unit of heredity
Explanation:
DNA is a double stranded helix structure. Each strand is made up of a string of nucleotides.
A gene is a region of DNA, usually tens of thousands of nucleotides long. At the simplest level, one gene encodes for one trait. Therefore, the gene can be described as the fundamental unit of heredity.
Genes work by coding for specific proteins, which carry out essentially all the functions in the cell.
Labeling the Water Cycle
Tyt
Place each step of the water
cycle in its correct location.
Evaporation
Precipitation
Condensation
Groundwater
Transpiration
Runon +
Check
Intro
Answer:
what you have is correct
Answer: the image above is correct :))
Explanation:
because
In which Colorado Rockies scenario was there more erosion? Why was there more erosion in the scenario?
Answer:
There was more erosion in the Colorado Rockies scenario where there was steady rain compared to the scenario in the same area where there was only a drizzle. There is more erosion because the steady rain increased the volume of the river more than the drizzle did. Because there was more water added to the river, the river flowed faster. The faster a river flows, the more sediments it transports or erodes.
Explanation:
hope this helps<3
Answer:
There was more erosion in the Colorado Rockies scenario where there was steady rain compared to the scenario in the same area where there was only a drizzle. There is more erosion because the steady rain increased the volume of the river more than the drizzle did. Because there was more water added to the river, the river flowed faster. The faster a river flows, the more sediments it transports or erodes.Explanation: Edge 2020
B) Explain how ATP and ADP act as allosteric regulators of enzymes that are responsible for ATP production, and how that is an example of feedback inhibition.
C) What is feedback inhibition? How is the ATP generating pathway discussed in part B an example of feedback inhibition?
Answer: B)
B) ADP can act as an allosteric activator by slowing the breakdown of fuel molecules if sufficient energy is in the cell. APT can act as an inhibitor by storing resources in more complex molecules. That is an example of feedback inhibitor because when the end product of the substrate is finished, it can bind to the allosteric site, which will result in the enzymes active site no longer being able to bind with the new substrates. And that is responsible for ATP production because That “stops” the enzyme from making more than necessary and thus wasting chemical resources.
C) Feedback inhibition is a method of metabolic control in which the need of the product of a metabolic that way acts as an inhibitor of an enzyme within that pathway. The APT generating path is an example of feedback inhibition because it controls the amount needed of the product and acts as an inhibitor of the enzyme in the anabolic pathway.
Explanation:
not sure if this is right, I just took stuff out of my bio textbook lol
What is one of the causes of mechanical weathering?
O acid rain
O oxidation
O animal actions
O carbon dioxide
Pls answer cuz I’m too dumb and didn’t pay attention in class
Answer:
C
Explanation:
Answer: c. Animal actions
Explanation:
What is MOST likely the reason why the author included the information about how mice responded to different types of
dust?
It’s for a test! i need help asap
Answer:
oso it gives you detail and and tell you if the mice should go there or not. and what things they like and where they wouldnt go
Explanation:
bu dont gve me alot idetaiout the q so yeaaaal a
Select from the drop-down menu to correctly complete the statement.
Different types of cells within an organism A do not have any function B serve a different function C can survive on they're own B are all the same
Answer:
b they all serve a differnt function
Explanation:
Different types of cells are present within an organisms serve different function.
What is cell?All living organisms are made up of cells, which are the basic building components. There are billions of cells in the human body. They support the body's structure, absorb nutrients from meals, transform those nutrients to energy, and perform specific activities. Cells also carry the body's genetic material and have the ability to replicate themselves.A cell is a cytoplasmic mass that is outwardly bound by a cell membrane. Cells are the smallest structural units of living matter and make up all living things. They are usually tiny in size. Most cells have one or more nuclei, as well as additional organelles that perform various functions.In unicellular and multicellular organisms, cells act differently. A unicellular creature relies on only one cell to conduct all of its duties. A multicellular organism contains cells that specialize in distinct roles and work together to maintain the organism.Hence the correct option is B.
To know more about cells here
https://brainly.com/question/19715268
#SPJ2
Help!! Why do geologists radioactive/carbon dating determine absolute age? (i need this quickly!)
Absolute dating methods determine how much time has passed since rocks formed by measuring the radioactive decay of isotopes or the effects of radiation on the crystal structure of minerals. Paleomagnetism measures the ancient orientation of the Earth's magnetic field to help determine the age of rocks.
6. What develops when cells undergo metastasis? O cleavage furrows O metaphase plates sister chromatids O malignant tumors
Answer: Malignant tumors
if you want mark brainlest.
The most important factor(s) which limit the number of animals that can live in a biome is/are:
i’ll mark as brainliest!! and give u 20 points!! please help :(((
Answer:
A and D i think
hope this helps
What will happen to the pressure in the brain if water moves into it from the blood?
Answer:
A sudden increase in the pressure inside a person's skull is a medical emergency. Left untreated, an increase in the intracranial pressure (ICP) may lead to brain injury, seizure, coma, stroke, or death. With prompt treatment, it is possible for people with increased ICP to make a full recovery
Explanation:
A medical emergency occurs when a person's internal pressure suddenly increases. An increase in intracranial pressure (ICP) may cause brain damage, seizures, comas, strokes, or even death if left untreated.
What is brain?The brain is a sophisticated organ that manages every bodily function as well as thought, memory, emotion, touch, motor skills, vision, respiration, temperature, and hunger. The central nervous system, or CNS, is made up of the spinal cord that emerges from the brain.
There are two distinct parts of the central nervous system: gray matter and white matter. Gray matter in the brain refers to the thicker, outer layer, and white matter to the thinner, inner layer beneath.
It is possible for patients with elevated ICP to fully recover with prompt treatment.
Therefore, A medical emergency occurs when a person's internal pressure suddenly increases. An increase in intracranial pressure (ICP) may cause brain damage, seizures, comas, strokes, or even death if left untreated.
To learn more about brain, refer to the link:
https://brainly.com/question/11950231
#SPJ2
Brainly involved! :) Why is studying animals in the wild considered to be somewhat experimentally "out of control"?
A) There are many factors that cannot be controlled that could influence the study.
B) It does not take place in a laboratory and is therefore not a valid experiment.
C) The test subjects are not trained to behave in a certain manner.
D) The experimenters are as careful with recording their results.
Answer:
Hmmm i tied between A and C because they both seem correct but since C sounds a little off ima say A
Explanation:
Answer:
A)
Explanation:
Other answers seem to appear only partially correct or not correct at all. If there's anything unclear, feel free to ask.
4 pros and 4 cons of nuclear desalination
20 points
Four pros of nuclear desalination; nuclear desalination provides accessible drinking water, helps with habitat protection, provides water to the agricultural industry, and uses a large amount of energy.
Four cons of nuclear desalination; Waste Disposal, nuclear desalination could lower down Ocean populations, nuclear desalination creates Health Concerns, and uses energy.