Why can the Calvin cycle work at night, but the photosystems cannot?
Answer:
Because photosystems need light to operate (photo=light).
Photosystems use energy from sunlight, Calvin systems use energy stored in the plant.
Explanation:
The Calvin cycle is a dark reaction because it does not need sunlight. Although it can happen during the day, this process does not require energy from the sun to work. Other names for the Calvin cycle include the Calvin-Benson cycle, light-independent reaction, carbon fixation and C3 pathway.
The Calvin cycle work at night, but the photosystems cannot because the photosystem needs direct energy from sunlight to be operated functionally.
What are Photosystems?Photosystems may be defined as functional and structural units of protein complexes involved in photosynthesis that contains chlorophyll pigments that absorb light energy for photosynthesis.
The Calvin cycle is a light-independent reaction that occurs during the night as well as daytime. But it utilizes the stored energy to make its final products with the help of several enzymes.
Therefore, it is well described above.
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The work cited page list citations in the following order
Answer:
Explanation:
You list the references in order of the last name of the author. For instance a book by Zachary Adam would come before a book by Adam Zachary. (Just an example)
Adam, Zachary. "Works Cited Example 1." Place of Publication: Publisher, Year.
Zachary, Adam. "Works Cited Example 2." etc.
Answer: Alphabetically by the first item in the entry.
Explanation:
Penn Foster
Which would best keep the oxygen cycle stable?
A. Cutting down jungles to create farmland
B. Eliminating parks in large cities
C. Dumping toxic chemicals into the ocean
D. Reducing the amount of deforestation
Answer: D. Reducing the amount of deforestation
Answer:
D. Reducing the amount of deforestation
Explanation:
Please mark as brainliest.
Hope this helps!!!!
Explain why in any given geographical region, Women tend to have lighter skins( by 3-4% on average) than men?
New research by Nina Jablonski and George Chaplin has led to the discovery that women across the world generally produce 3-4% less melanin in their skin than men.
They suggest that this is probably due to the fact that women have much higher calcium requirements during their reproductive years.
Why is fair skin attractive?
Researchers have found that men are subconsciously attracted to lighter skin because of its associations with purity, innocence, modesty, and goodness, while women feel that darker skin is associated with sex, masculinity, and danger.Learn more about skin here.
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witch one is it a,b,c or d
Answer:
b. a higher luminosity
Explanation:
Answer:b
Explanation: becuase it is a powerful luminosity
How do feedback signals affect the cell cycle ?
Answer:
The cyclins activate the CDKs, which affect the cell cycle at three important checkpoints: Late in the G1 stage of the cell cycle, triggering the cell to move into the S phase.
Explanation:
can someone list all the steps in the scientific process
Konichiwa~! My name is Zalgo and I am here to help you today. The steps of the Scientific Process are shown as following:
1. Ask a question. For your first step, help your child form a question, hopefully one that can be answered.2. Do some background research.3. Start constructing a hypothesis.4. Test your newly-made hypothesis by doing an experiment.5. Analyze the data of your experiment and make a conclusion.6. You can share your results.
I hope that this information helps! :D
"Stay Brainly and stay proud!" - Zalgo
(By the way, can you give me Brainliest? I'd greatly appreciate it! Arigato~!)
Starting billions of years ago, algae lowered the
atmosphere.
levels in the
A. oxygen
B. ozone
C. carbon dioxide
D. methane
Answer:
Starting billions of years ago, algae lowered the
atmosphere.
levels in the carbon dioxide - C.
Algae has been found to have lowered the atmospheric carbon dioxide levels in the environment. Thus, the correct option is C.
What is Algae?In the primitive world, the initially formed organisms such as algae, were found responsible for the production of large amounts of oxygen in the atmosphere. This was possible by the algae present in atmosphere, as they were able to carry out the process of photosynthesis similar to plants, where the food is synthesized in the presence of sunlight, water and carbon dioxide (CO₂), and in return, it generates food and oxygen, on which the organisms are dependent on for their living.
Thus, these algae were responsible for the changes in the atmosphere, by converting carbon dioxide (CO₂) into oxygen and hence lowering the level of carbon dioxide.
Therefore, the correct option is C.
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Brendan made a chart to categorize the characteristics of animals. Which phrase should be written in the column titled "Always”? Have a backbone Are warm-blooded Are multicellular Eat plants
Answer: Are multicellular
Explanation:
Answer:
Are multicellular
Explanation:
All the animals are included in the Kingdom Animalia. It is the largest Kingdom among other kingdoms namely Monera, Protista, Fungi and Plantae. Animals are multicellular and their cells are eukaryotic. They have heterotrophic mode of nutrition. Based on their body design Kingdom Animalia is into different phyla. Examples of animals are Hydra, earthworm, insects, birds, humans.
The layer of the atmosphere that contains the ionsphere is the blank
Hello There!
This is called the "Thermosphere"
The thermosphere is the biggest part of the Earth's atmosphere. This layer is very important because it protects us on earth from UV radiation. UV radiation is harmful for humans skin and their hair. It is also extremely hard to breathe in this layer because the thermosphere is made up of mostly nitrogen and oxygen.
The functional unit of the kidney is the ____
Answer:
The functional unit of the kidney is the Nephron.
Answer:
nephron
Explanation:
What are the differences and similarities between moss and grass?
Answer:
so grass is just like the just grass, u see it in fields, ur front/back lawn, basically everywhere, and moss is kinda like grass but stuck in like a ball sometimes, or grass just in the form of a ball and kinda squishy, or u see it stuck to the top of rocks sometimes, it's like a type of fungus, emphasize the word like
What would most likely happen if a person increased the amount of saturated fat in his or her diet?
The person's risk of cardiovascular disease would increase.
The person's risk of cardiovascular disease would decrease.
The person's bad cholesterol would decrease.
The person’s good cholesterol would increase.
Answer:
The person's risk of cardiovascular disease would increase.
Explanation:
saturated refers to all single bonds in the hydrocarbon chain, meaning no kinks in the chain. The hydrocarbon has the most number of carbons it can have, as there are all single bonds. If the hydrocarbon has even one less carbon, there would be kink, and it would be unsaturated and liquid. Our body needs less carbon, so unsaturated fats are better. But having saturated fats means no liquid, rather solid, which means harder for the blood to get to the heart. So your risk would cardiovascular disease would increase
Answer:
a
Explanation:
Oxygen is a reactant in cellular respiration. Which term best describes oxygen
in photosynthesis?
Answer:
ANSWER: Oxygen is a product of photosynthesis.
Explanation:
Photosynthesis is a chemical reaction that occurs in plants. Photosynthesis uses ATP energy from sunlight to convert Carbon Dioxide and Water into Glucose. Oxygen is also formed during photosynthesis.
Oxygen is the product of photosynthesis, where water and carbon dioxide are the reactants and G3P and oxygen are the products. This contrasts with cellular respiration, where oxygen is a reactant.
Explanation:When it comes to the role of oxygen in photosynthesis, it is best described as a product rather than a reactant. In the process of photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) and, using the energy from sunlight, convert these reactants into glucose (C6H12O6) and oxygen (O2). The correct statement among the options provided would be option (b), which states that in photosynthesis, chlorophyll, water, and carbon dioxide are reactants, while G3P (glyceraldehyde-3-phosphate) and oxygen are products.
This contradicts the role of oxygen in cellular respiration, where oxygen serves as a critical reactant. In cellular respiration, oxygen is used to break down glucose, producing ATP, water, and carbon dioxide as waste products.
(NEED HELP FAST) The amount of energy required to break a nucleus into individual protons and neutrons is called
A)mass-energy equivalence
B)mass defect
C)binding energy
D)mass-energy conservation
Answer:
The answer is C
Explanation:
The amount of energy required to break a nucleus into individual protons and neutrons is called binding energy.
What is atom?
Atoms consist of a positively charged nucleus consisting of protons and neutrons surrounded by a cloud of electrons charged negatively. An atom is any particle of matter at its most basic level which contains at least one proton.
Nuclear binding energy is the energy required to separate an atomic nucleus completely into its constituent protons and neutrons, the energy that would be liberated by combining individual protons and neutrons into a single nucleus.
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Explain what would happen to the atmosphere in the absence of sunlight. Give two supporting details for your answer and use complete sentences.
Can someone help me with this please.
Answer:
In the absence of sunlight the plants which are dependent on sunlight for making food that is photosynthesis would die.
Also the people will suffer as sunlight is a good source of Vitamin D and in absence of sunlight they will not get it so easily.
Most fossils are deposited in water. How do scientists find them
Answer:
Most fossils are found in sedimentary rocks, those rocks produced by the accumulation of sediment such as sand or mud. Wind and other weathering conditions wash away sediment on land, depositing it in bodies of water. For this reason, fossils of sea creatures are more common than those of land creatures.
Fossils are remain of decayed plants and animals over a very long period of time. Most fossils are found in sedimentary rock deposits which might have been exposed due to erosion, quarrying or at shore.
Fossils are usually found in sedimentary rock deposits, which might have become exposed to the surface after thousands to millions of years after deposition began. Since deposits of rock stretch over a very large area, fossils deposited in water which are preserved in sedimentary deposits may be exposed at shore. Also, fossils such as sea shells mollusk are usually washed up shore in large amount.Therefore, fossils could also be found during quarrying and rock cutting process.
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Approximately 60% of human genes are also found in fruit flies. About 97.5% of human genes are also found in mice. What does this evidence suggest?
A.) Humans and mice share a more recent common ancestor than do humans and fruit flies.
B.) Mice have had more mutations and recombinations during their evolution than fruit flies.
C.) Mice and fruit flies share a more recent common ancestor with each other than with humans.
D.) Fruit flies have had more mutations and recombinations during their evolution than mice.
A
Explanation:
I believe this because there is more of a percentage with mice then fruit flies
Humans and mice share a more recent common ancestor than do humans and fruit flies, suggest about 97.5% of human genes are also found in mice, hence option A is correct.
What is the evolution of humans?According to comparisons of anatomy and genetics, scientists usually concur that, among the living animals in this category, humans are most closely related to chimpanzees.
Each and every other living thing on earth shares the same DNA as humans. They are most closely linked to chimpanzees and bonobos, with whom they share 98.7 percent of their DNA.
Additionally, they have more than 50% DNA in common with produce like bananas and insects like fruit flies.
It is assumed that the last common progenitor of humans and chimpanzees is much more recent than the last common ancestor of humans and plants.
Based on the fact that there are more similarities between humans and chimpanzees than between humans and plants.
Therefore, option A is correct.
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which type of stimulus do mechanoreceptors detect? sound pain heat light
Mechanoreceptors detect mechanical stimuli such as touch, pressure, sound waves, and motion. These receptors initiate nerve impulses when physically deformed by an outside force. Several types of mechanoreceptors, including Merkel cells and Pacinian corpuscles, are specialized for different kinds of mechanical detection.
The correct option is 'A'.
Mechanoreceptors detect mechanical forces, and the type of stimulus they are especially tuned to includes touch, pressure, sound waves, and motion. These receptors enable us to sense various forms of mechanical input such as the texture we feel via touch or the vibrations we hear as sound.
The process by which they work involves the deformation of the receptor upon the application of a mechanical force, which initiates nerve impulses in sensory neurons.
Mechanoreceptors are categorized based on the threshold of stimulus they respond to.
Low-threshold mechanoreceptors respond to non-damaging, light stimuli, while high-threshold mechanoreceptors respond to stimuli of a higher intensity and are considered a type of nociceptor, contributing to our sense of pain when the applied pressure is severe enough, such as pinching or crushing.
They can be found in various locations, including the skin, where they are essential for the sense of touch, and in the inner ear, where they are necessary for the senses of hearing and balance.
Distinct types of mechanoreceptors are specialized for detecting different kinds of mechanical stimuli, for example, Merkel cells detect low-frequency vibrations, Pacinian corpuscles sense deep pressure and vibration, and Ruffini corpuscles respond to skin stretching.
This question is incomplete, the complete question is :
which type of stimulus do mechanoreceptors detect?
A. sound
B. pain
C. heat
D. light
a diploid human cell contain 46 chromosomes if such a cell under go mitosis then how many chromosome will be present in the daughter cells if it has just passed through telophase
Answer:
The daughter cells will have equal number of chromosomes like that of parent cell i.e. 46.
Explanation:
Mitosis is a process of division that creates two new daughter cells with same genetic material and thus equal number of chromosomes. It involves: Prophase, Metaphase, Anaphase, Telophase and at the end cytokine.
In prophase, the nuclear envelope of the cell breaks down along with chromosome condensation. In metaphase, the condensed chromosomes line up at equatorial plate. In anaphase, the sister chromatids of lined chromosomes are pulled towards the opposite poles. While in telophase the cell is ready for division, its nearly dividing stage in which the cell retains its normal structures.
Which is a group of tissues that work together to carry out a common function?
cell
organ
organelle
organ system
Answer:
organ
Explanation:
An organ is a group of tissues that work together to carry out a common function?.
Answer:
organ
Explanation:
Select the correct answer
John wants to show the evolutionary relationship between a lion and a cat and group them based on the
these is the best and simplest method to represent this information?
A.
Cladistic analysis
B.
Taxonomy
C.
Tree of Life
Reset
Reset
Next
Next
Answer:
The answer is c. tree of life.
Explanation:
this method visually, best compares similarities and differences so the audience can judge the same question.
What idea did Malthus introduce?
Answer:
The Malthusian Theory of Population: The concept that the human population exponentially grows and will eventually be too large to be supported by the food production rate, leading to mass starvation.
People who believe this are Malthusians.
Explanation:
This is more of an APHG question, but yeehaw
Malthus illustrated the essay on the principles of population and its growth. According to his theory, the population growth will consistently supervise to outrun the food supply.
Who was Thomas Malthus?Thomas Malthus was an English scholar and influential economist who worked in the field of economy and demography.
The theory of Malthus reveals the growth of the population with respect to the food supply. He believed that the balance between population growth and food supply can be maintained through preventative and flattering appraisal.
Therefore, it is well described above.
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PLS HELP !!!!!! The table below shows the role of different substances during photosynthesis.
Substance Role During Photosynthesis
Glucose Stores chemical energy
Water Combines with glucose to form carbon dioxide
Chlorophyll Traps sunlight
Which of the following statements would correct one of the roles listed in the table?
Glucose combines with carbon to form water.
Chlorophyll reacts with light to produce carbon dioxide.
Water combines with carbon dioxide during photosynthesis.
Chlorophyll stores chemical energy needed for photosynthesis.
The correct statement that should replace the incorrect one in the table is 'Water combines with carbon dioxide during photosynthesis'. This process uses water and carbon dioxide to produce glucose and oxygen under the influence of sunlight and chlorophyll.
Explanation:In the table about the role of different substances during photosynthesis, there is a mistake. The role of water is incorrectly listed. The correct statement should be 'Water combines with carbon dioxide during photosynthesis'. In this process, water and carbon dioxide are used to produce glucose and oxygen under the influence of sunlight and chlorophyll. Glucose is the form in which the energy from the sun is stored, and oxygen is the byproduct of the process.
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How are mitosis and meiosis similar?
The answer is A, they both involve duplicating chromosomes.
A scientific idea becomes valid when it is what?
Answer:
when it is proven
Explanation:
A scientific idea becomes valid when it is tested.
Which is an idea that Einstein introduced in his theories of relativity?
A.) Space is made up of three dimensions.
B.) Space and time are separate and distinct entities.
C.) Space-time bends due to the masses in the universe.
D.) Gravity is caused by a force of attraction between two masses.
Answer:
Space-time bends due to the masses in the universe.
Choice C is correct
Explanation:
Space-time bends due to the masses in the universe is an idea that Einstein introduced in his theories of relativity.
If a body of any mass is placed down anywhere in the Universe the space around it will curve in response.
Blood stem cells may develop into any kind of human blood cells. What kind
of stem cells are blood stem cells?
A. Multipotent stem cells
O
B. Totipotent stem cells
O
C. Pluripotent stem cells
O
D. Unipotent stem cells
Multipotent stem cells have the ability to differentiate into a limited number of cell types within a specific lineage. The kind of stem cells that blood stem cells are is A. Multipotent stem cells.
Multipotent stem cells, such as blood stem cells, have the ability to differentiate into multiple cell types within a specific lineage or tissue. In the case of blood stem cells, they can give rise to different types of blood cells, including red blood cells, white blood cells, and platelets. This versatility allows blood stem cells to replenish and maintain the blood cell population throughout a person's lifetime.
In the case of blood stem cells, they have the capacity to develop into various types of specialized blood cells, such as red blood cells, white blood cells, and platelets. While blood stem cells are highly versatile within the context of blood cell development, they do not have the ability to differentiate into cells from other germ layers or tissues outside the blood lineage.
Therefore, they are classified as A. multipotent stem cells.
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Which structure is found in all cells?
Answer:
All cells have a plasma membrane, ribosomes, cytoplasm, and DNA.
Explanation:
The structures that are found in all types of cells are the cell membrane, ribosomes, cytoplasm, and DNA\
In biology, the smallest unit can live on its own and that makes up all living organisms and the tissues of the body. A cell has three main parts: the cell membrane, the nucleus, and the cytoplasm. The cell membrane surrounds the cell and controls the substances that go into and out of the cell. The nucleus is a structure inside the cell that contains the nucleolus and most of the cell’s DNA. It is also where most RNA is made. The cytoplasm is the fluid inside the cell. It contains other tiny cell parts that have specific functions, including the Golgi complex, the mitochondria, and the endoplasmic reticulum. The cytoplasm is where most chemical reactions take place and where most proteins are made. The human body has more than 30 trillion cells.
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Which best describes the relationship between DNA, genes, and chromosomes?
DNA is the basic unit of life. Long sequences of DNA form genes which contain instructions for producing proteins. Even longer strands of DNA are chromosomes which contain many many genes.
Hope this helps!!
Genes make up DNA and DNA makes up chromosomes this describes best the relationship between DNA, genes, and chromosomes.
What explains the relationship between DNA and chromosomes?In the nucleus of every cell, DNA molecules are packaged in a thread-like structure called a chromosome. Each chromosome is composed of DNA that is tightly wrapped around a protein called histone that supports its structure.
Each gene tells cells how to assemble the components of a particular protein. However, genes (DNA) are located in cell (nucleus) compartments that are different from the cell machines that make proteins (ribosomes).
Chromatin is a mixture of DNA and proteins that make up the chromosomes found in cells of humans and other higher organisms. Many of the proteins, histones, package vast amounts of DNA in the genome into a very compact shape that fits in the nucleus of the cell.
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