Answer:
Yes.
Explanation:
Yes, Schwann and Schleiden are responsible for the cell theory, both the scientists presented the cell theory in 1839. I agree with the argument of my classmate because the person who first presented cell theory was both Schwann and Schleiden. Schwann works on plant cell whereas Schleiden works on animal cell and formulate cell theory. So my classmate's argument is right about cell theory.
Schwan and Schleiden proposed the first cell theory, suggesting spontaneous generation. Virchow changed it proposing cell division. After many years and the contribution of many researchers, the modern cell theory emerged.
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Schwann studied animal tissues. Through careful observation, he concluded that all animal tissues were made of cells.
Simultaneously, Schleiden arrives at the same conclusion when studying vegetable tissues.
Around 1830, they met and together proposed the first cell theory. The theory stated that:
1. Every living being is made of cells.
2. Cell is the basic unit of life.
3. Cells are originated from spontaneous generation.
Virchow, who studied human tissues, sow the cell in its dividing process.
He proposed that cells were not originated from spontaneous generation, as Schwann and Schleiden had stated.
Instead, he said that cells were the product of other pre-existing cells and were originated by cellular division.
Virchow rejected the third state of Schwann and Schleiden’s ideas.
According to these sequence of events, the original cell theory changed to
1. Every living being is made of cells.
2. Cell is the basic unit of life.
3. Cells are originated by cellular division.
After many years of continuous studies about cells and their functions, the modern cell theory emerged.
In general terms, the modern theory can be resumed as,
1. Every living being -unicellular or multicellular- is made of cells, which are the most basic units of life.
2. Cell control the vital functions of organisms.
3. Cells proceed from preexistant prokaryotic cells, and are originated by cellular division.
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What attitudes do you think are most healthy for teenagers to adopt during adolescence?
Answer:
Emotional responsibility, individual values, pursuing dreams and consistency are healthy attitudes that help keep a positive outlook on a teenager.
Explanation:
What are other examples
of physical change and chemical
change that I found in my home?
Answer:
Chemical changes=Burning of paper and log of wood.
Digestion of food.
Boiling an egg.
Chemical battery usage.
Electroplating a metal.
Baking a cake.
Milk going sour. Some examples of physical change are freezing of water, melting of wax, boiling of water,
Answer:
examples of physical change: boiling of water, freezing of water, melting of frozen liquid(ICE).
"""""""""""""""""chemical"""""""""":burning of match stick
Match these items.
1. flower parts
hyphae
2. cone parts
pistil and stamen
3. fungi parts
mitosis
4. fern parts
scales
5. vegetative reproduction
leaf and spore case
6. cell division
without seeds
1. flower parts- Pistil and Stamen
2. cone parts- Scale
3. fungi parts- Hyphae
4. fern parts- Leaf and Spore Case
5. vegetative reproduction-Without Seeds
6. cell division- Mitosis
The evolution of a species is dependent on changes in the genome of the species. Identify two mechanisms of genetic change, and explain how each affects genetic variation.
Answer:
Mutation, fertilization, meiosis are different mechanisms by which changes can occur in the genome.
Explanation:
There are several process which is responsible for causing change in the genome of the species which results in the evolution of that species. Some of these processes are:
1. Mutation: In mutation, some nucleotide sequences get change and this change can occur due to frameshift, addition, deletion or any other process. This change in nucleotide can be seen in phenotype and helps in the evolution of the species.
2. Fertilization: During fertilization mixing of the genome of two individual takes place which results in producing a genetically distinct offspring which contains variation. So as the offspring is genetically different it can contain new alleles that can help the individual to survive in the changing environment.
Two mechanisms or vehicles through which genetic change occurs are;
Mutation and Gene flowMutation occurs when there is a mistake in the DNA sequence of an organism. When an egg and a sperm bearing the faulty DNA sequence mate, a mutated organism is formed.
A standing genetic variation is formed through mutation because of the differences in the organisms of a population.
Phenotypes that indicate the physical appearance of organisms change during mutation.
Gene flow is another channel for genetic change. It occurs when two populations with different allele frequencies unite in the same environment and then assume similar allele frequencies.
When mating occurs, the allele frequencies of these populations can assume similarity.
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Process by which bacteria converts nitrates into nitrogen gas
cell type making up most of your body tissue
Answer:
Connective tissue. Connective tissue is the most abundant tissue type in the body. In general, connective tissue consists of cells and an extracellular matrix. The extracellular matrix is made up of a ground substance and protein fibers.
Which of the following shows levels of organization in living things, from smallest to largest?
A)organ - cell - organ system - tissue
B)organ system - tissue - cell - organ
C)cell - tissue - organ - organ system
D)organ system - organ - tissue - cell
Answer:
C. cell- tissue- organ- organ- system
What will happen if gametes were diploid cells?
Answer:
If gametes were produced instead by mitosis each gamete would be diploid not haploid. During fertilization of diploid gametes, the zygote would become 4n=92. With each new generation the number of chromosomes would double.
100 points
Due Oct 12, 11:59 PM
Extension Draw a diagram and write a paragraph which explains how humans have produced a desired characteristic in
a cow through selective breeding. Use an example in your answer. Also, explain the advantage of your desired
characteristic.
Write down some of the limitations of selective breeding
Answer:
If this is supposed to be an essay, do some reaseach...
Explanation:
How are amino acids joined together to form a protein?
Answer:
Hey mate.....
Explanation:
This is ur answer......
To make a protein you will need 20 amino acids.....
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Chose ALL the choices that are true about exponential growth: a Rapid (fast) period of growth b Has carrying capacity c "S" curve d "J" curve e Takes place when there are lots of resources ex: food, space f Takes place when there are limited resources ex: food, space
Answer:
a, d, and e
Explanation:
The exponential growth is a period characterized by rapid growth as a result of the availability of unlimited resources for the use of the population. Once the population spends a short period getting acclimatized to their environment, a period of rapid growth follows that is devoid of any limitation and thus, the growth curve forms a 'J' shape. This type of growth has no carrying capacity that limits its growth and may not be possible in real life where resources are limited.
The correct options are a, d, and e.
3. The Kinetic Theory describes the ____
all matter
of particles in
all matter
Scientists can find new discoveries that change their current understanding of scientific knowledge. (3 points) True False
Answer:
true
Explanation:
Answer:
True
Explanation:
Which type of heat transfer causes a person sitting by the fire to feel warm?
a, absorption
b, conduction
c, convection
d, radiation
Why does temperature not change during phase change?
Answer:
during phase change, the energy supplied is used only to separate the molecules,no part of it is used to increase the kinetic energy of the molecules. So its temperature will not rise, since kinetic energy of molecules remains the same.
What is the name of the molecule that contains three phosphates and is
the primary energy currency of cells?
Answer: ATP
Explanation: ATP is the name of the molecule that contains three phosphates and is the primary energy currency of cells.
7. If you look closely at an image of a clear-cut forest, you can see that clear-cutting does more than just remove trees from an ecosystem. What other effects will clear-cutting have on this ecosystem? Select all answers.
a. runoff will affect the stream ecosystem
b. Erosion will remove nutrient-rich topsoil.
c. Nutrients continue to cycle into the soil.
d. Some animal populations will move away .
Answer:
d
Explanation:
d is the answer ........................................Answer:
j7hy56gt
Explanation:
Cold air is more ________________, so it sinks
a. expanded (Will Give Brainiest!)
b. hot
c. dense
d. volume
Answer:
Dense, it falls because it is more dense then warmer air
Explanation:
Plants release oxygen into the
atmosphere by...
A. Splitting apart water molecules
B. Splitting apart carbon dioxide
C. Attaching water together
D. Attaching oxygen together
Answer:
A
Explanation:
Plants use water in the process of photosynthesis, (to make food) but they don't need all of it. They use carbon dioxide, the stuff people and animals breath out, and release oxygen for us to breath, then we breath out carbon dioxide again and the process happens again.
Fun fact: Did you know that rain forests make their own weather? Plants not only release oxygen into the air, but tiny droplets of water. (water vapor, and this part of the water cycle is called transpiration) Those droplets condense and form clouds. That's why it rains every day in tropical forests. Cool huh?
Why / how does hydrogen bonding help ice cubes float?
Answer:
First, we must understand:
What is Hydrogen Bonding?
Hydrogen Bonding is the interaction between Hydrogen atoms, with their molecules, due to the fact that their (Hydrogen atoms and bonds) are weak that even the other types of bonds are stronger.
(The other bonds are: covalent and ionic bonds)
(Hydrogen bonds are weaker than the average bonds listed above)
If you are to take how and why hydrogen bonds effect/affect ice cubes, we would have to look at how ice cube are formed. If you know, ice cubes can be created due to low temperatures (cold temperatures) making water into a solid. When ice cubes form into a sold, the spacing of the molecules become further apart, creating the density of the overall ice cube lighter than it was allowing it (ice cubes) to float.
Which process binds together sediment to form new rock?
cementation
compaction
deposition
erosion
Answer:
It will be (cementation).
That's the correct answer.
The process that binds together sediment to form new rock is cementation. The correct option is A.
What is cementation?Cementation is the process of mineral materials precipitating in the pore spaces to harden and weld clastic sediments (those generated from preexisting rock pieces). It is the final phase of sedimentary rock formation.
Through cementation, sediments become sedimentary rock. In the spaces between the sediment particles, this action causes the precipitation of minerals.
Examples of cementing include carbonate hard ground and beach rock. Black rock is a particular kind of rock that develops along the shore and is composed of a wide variety of sediment types and sizes that have been cemented together.
Therefore, the correct option is A. cementation.
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1. A volcanic eruption levels the land in the surrounding area,
covering everything with ash and killing almost all living things. This is
classified as a
limiting factor.
2. As the population of elks in a forest increases, the decreasing
availability of their food source, aspen and willow leaves, acts as a
limiting factor.
3. Part of a forest is clear-cut to make room for new buildings and
roads as part of a housing development. This decreases the available
habitat for all species, making it a
limiting factor.
The limiting factors for these scenarios are density dependant or density-independent.
The growth or decrease of a population depends on factors that can or cannot be related to the number of inhabitants that the population has.
Density dependant limiting factors: the growth rate of a population changes due to the increase in a population's density, that is to say, the number of inhabitants, has a direct impact on the growth or decrease of this population.
Density Independent limiting factors: the growth rate of a population changes due to factors that are not related to the population itself. In other words, they are external factors, such as a volcanic eruption, that affect the rate.
In conclusion, a volcanic eruption covering everything in ash and killing almost all living things is a density-independent limiting factor. The increase in the population of elks and the decrease in their food source is a density dependant limiting factor, which makes elks compete for food. Lastly, part of a forest being clear cut to make room for buildings, and decreasing the available habitat for species is a density-independent limiting factor.
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Can someone help me??
Answer:
S6 = E1
S5 = E6
S4 = E5
S3 = E3
S2 = E4
S1 = E2
Explanation:
What piece of equipment is used to measure mass?
Answer:
triple beam balance
Explanation:
Hope this helped <3
Which dye could the technician use to determine whether the cells are prokaryotic or eukaryotic?
Eosin
Nile blue
Acridine Orange
Osmium Tetroxide
Answer:
nile blue should be the correct answer
Alice wants to find out whether her pet gecko finds its prey based on vision. She thinks that her gecko will more easily see the colored crickets. She follows these steps:
get 10 similar crickets from the pet store
tag 5 of the crickets by putting a tiny dab of bright coloring on their backs
release all 10 crickets into the terrarium with the gecko at the same time
after several hours, record the number of tagged and non-tagged crickets still alive in the terrarium
After several hours, Alice notes that only 4 non-tagged crickets were still alive in the terrarium. No tagged crickets were observed. She concludes that her gecko uses mostly its vision to capture and eat its prey.
What is another possible explanation for these results?
She relays more on her vision than her other senses so you could assume she has good eye sight or something.
Limiting factors in water bio mes include
amount of salt
amount of dissolved oxygen
amount of sunlight
all of the above
Answer:
all of the above
Explanation:
Water biomes describe all the living things living in an area of water such as a lake or ocean. The surrounding environment plays a huge part in what organisms able to live there.
For example, green plants and algae require sufficient sunlight and oxygen to perform photosynthesis. Green plants and algae are an important food source for many other organisms. The amount of salt is important for various fish, as they will be unable to survive in very high salt concentrations. Therefore, all of the above are limiting factors.
Why does the us have limited government
Answer:
The U.S. Constitution achieved limited government through a separation of powers: "horizontal" separation of powers distributed power among branches of government (the legislature, the executive, and the judiciary, each of which provide a check on the powers of the other); "vertical" separation of powers (federalism) ...
6. Which of the following are the control variables?
A. Both number of fish and temperature B. Both temperature and light
I
C. Both light and behavior of fish
D. Both number of fish and behavior of fish
Answer:
Option (A)
Explanation:
As temprature can be regulated as well as the number of fish can be changed
PLEASE HELP THIS CAN HELP MY GRADE IN THIS CLASS SO MUCH
Answer:
what are the answer choices
