leaf is a site of photosynthesis why
Answers
because it absorbs light through its stomata and it contains chlorophyll
Related Questions
The respiratory membrane, across which gases diffuse, is very thin and is made up of _______________.
A) alveolar macrophages and the alveolar cell membrane
B) alveolar cell membrane and its basement membrane
C) alveolar cell membrane and capillary membrane
D) alveolar cell membrane, capillary membrane, and fused basement membranes
Answers
The respiratory membrane, across which gases diffuse, is very thin and is made up of C) alveolar cell membrane and capillary membrane.
The respiratory membrane is the site of gas exchange between the air in the alveoli and the blood in the pulmonary capillaries. It consists of the thin walls of the alveoli and the pulmonary capillaries. The alveolar wall is composed of two main layers: the alveolar epithelium and the capillary endothelium. These two layers are separated by a thin interstitial space, which contains a thin basement membrane.
The diffusion of oxygen and carbon dioxide occurs across the alveolar cell membrane and the capillary membrane, which are composed of phospholipid bilayers and associated proteins.
Therefore, the correct answer is C) alveolar cell membrane and capillary membrane.
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which biome is described here? low, low rainfall, scattered and well defended vegetation, and nocturnal animals.
Answers
Answer:
The biome described here is likely a desert biome. Deserts are characterized by low rainfall, scattered and well defended vegetation, and nocturnal animals that are adapted to survive the extreme conditions.
What is the purpose of replicating DNA before cell division
Answers
Answer: This ensures that each daughter cell gets a copy of the genome, and therefore, successful inheritance of genetic traits.
Explanation: Hope this helps!
What is most
important for the formation of bone? *
A)Vitamins
B)Proteins
C)Minerals
D)Carbohydrates
Answers
Answer:
_______vitamins_______
Which individual is shown in the karyotype?
male with Turner syndrome
male with Klinefelter syndrome
female with Turner syndrome
female with Klinefelter syndrome
Answers
Answer:
Males with Klinefelter Syndrome
Explanation:
PLEASE HELP
The theory of plate tectonics is supported by evidence that crustal plates move relative to each other. How does this observation support the theory of plate tectonics?
It suggests that plates are dragged around by ocean currents.
It suggests that plates are dragged around by air currents.
It suggests that plates can move independently of one another.
It suggests that plates cannot move independently of one another.
Answers
Answer:
Its c the third answer
Explanation:
If two 4-Newton forces act on an object in the same direction, what is the net force on the object?
Answers
Answer:
8 Newton net force
Explanation:
Have a nice day
1.substrate-level phosphorylation: transfer of po4 directly to adp to make atp during glycolysis. 2. oxidative phosphorylation: atp synthase enzymeuses energy from a proton gradient to make atp. t/f
Answers
Both are true.
1. Substrate-level phosphorylation involves the direct transfer of a phosphate group (PO₄) to ADP to form ATP during glycolysis.
2. Oxidative phosphorylation, is the process in which ATP synthase enzyme uses the energy from a proton gradient to synthesize ATP.
1. Substrate-level phosphorylation is a type of ATP synthesis that involves the direct transfer of a phosphate group (PO4) from a high-energy intermediate molecule to ADP to generate ATP. This process occurs during glycolysis, which is the first stage of cellular respiration. During glycolysis, glucose is broken down into two molecules of pyruvate, and ATP is generated through substrate-level phosphorylation. This process does not require oxygen and occurs in the cytoplasm of cells.
2. Oxidative phosphorylation is a type of ATP synthesis that involves the use of energy from a proton gradient to generate ATP. This process occurs in the mitochondria and requires oxygen. During oxidative phosphorylation, electrons from NADH and FADH2 are passed along a series of electron carriers in the electron transport chain (ETC), which pumps protons across the inner mitochondrial membrane, creating a proton gradient. The energy from this gradient is then used by ATP synthase to produce ATP. This process is called oxidative phosphorylation because it relies on the oxidation of electron carriers in the ETC to generate energy.
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How might hypermethylation of the TP53 gene promoter influence tumorigenesis?
The concentration of p53 will be increased, the process of tumorigenesis will be stimulated.
The concentration of p53 will be decreased, the process of tumorigenesis will be suppressed.
The concentration of p53 will be increased, the process of tumorigenesis will be suppressed.
The concentration of p53 will be decreased, the process of tumorigenesis will be stimulated.
Answers
When the concentration of p53 is decreased due to hypermethylation of the TP53 gene promoter, the process of tumorigenesis is stimulated.
TP53 is a tumor suppressor gene that plays a crucial role in regulating cell division and preventing the formation of cancerous tumors. Hypermethylation of the TP53 gene promoter region can result in the silencing of the gene, leading to decreased expression of the p53 protein. This can have a profound effect on tumorigenesis.
This is because p53 is responsible for detecting DNA damage and initiating cell cycle arrest or apoptosis in damaged cells. Without adequate levels of p53, damaged cells can continue to proliferate and accumulate mutations, increasing the risk of tumor formation.
On the other hand, when the concentration of p53 is increased due to hypomethylation or other factors, the process of tumorigenesis can be suppressed. This is because p53 can activate a number of pathways that lead to cell death or senescence, halting the growth of cancerous cells.
Overall, hypermethylation of the TP53 gene promoter can have a significant impact on tumorigenesis by altering the expression of p53. This underscores the importance of understanding the epigenetic regulation of tumor suppressor genes in the development and progression of cancer.
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What are the 3 steps, in order, of cellular
respiration?
Fermentation, Glycolysis, Electron transport
chain
Kreb's cycle, Electron transport chain,
Glycolysis
Glycolysis, Kreb's cycle, Electron transport
chain
Electron transport chain, Glycolysis, Kreb's
cycle
Answers
Answer:
glycolysis, krebs cycle, and electron transport
37. Draw and label a sketch of the different shapes of bacteria and the different arrangements that they may form when grouped together.
Answers
Different shapes of bacteria are - (A) Cocci (B) Bacilli (C) Spirilli
Bacterial variations in both shape and organizationCocci are spherical-shaped bacteria that frequently occur in pairs or clusters.
The rod-shaped bacteria known as bacilli are typically found in chains, pairs, or single cells.
(C) Spirilli: Spirilli are bacteria with spiral shapes that are typically discovered in lengthy, twisted chains.
(D) Vibrio: Comma-shaped Vibrio bacteria are typically discovered in pairs or clusters.
These are the steps in this procedure:
1. To illustrate a cocci bacteria, draw a circle in the page's middle.
2. In order to illustrate a bacilli bacteria, draw a horizontal line beneath the circle.
3. Next to the circle, draw a curved line to depict a spirilli bacteria.
4. To indicate a vibrio bacteria, draw a comma-shaped line to the right of the circle.
5. Indicate the name of each shape that corresponds to it.
6. To indicate groups or pairs of objects, draw a few tiny circles or lines around the appropriate forms.
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Your class is participating in a population genetic simulation. You and your classmates are the predators and your prey is candy in a jar: chocolate (AA), chocolate and mint (Aa), and mint (aa). Each time you and your classmates eat one candy, your prey reproduces (more candy is added to the jar). After several generations you observe 80% of the prey remaining in the jar is chocolate (AA). What percent of your remaining prey is mint (aa) assuming that Hardy-Weinberg equilibrium is being followed
Answers
Answer:
1%
Explanation:
1. All ecosystems are made up of ________________ and ___________________ components.
2. ______________ factors are living things, such as _______________ or _______________.
3. ______________factors are nonliving things, such as wind, ______________, or ______________.
4. ____________________ are organisms that get their energy from ___________________ resources, meaning they make their own food. These organisms are also called ______________.
5. ___________________ are organisms that get their energy by __________________other
organisms. These organisms are also called _________________________.
6. Why are producers so important to an ecosystem?
____________________________________________________________________________________________________________________________________________________________
Answers
Answer:
All ecosystems are made up of abiotic and biotic components.
biotic factors are living things, such as plants or animals.
abiotic factors are nonliving things, such as wind, temperature, or moisture.
producers are organisms that get their energy from nonliving resources, meaning they make their own food. These organisms are also called autotrophs.
consumers are organisms that get their energy by eating other organisms. These organisms are also called heterotrophs.
Why are producers so important to an ecosystem?
They create the base of the food chain/food web
Explanation:
The answers can be explained as:
1.Ecosystem is made up of biotic and abiotic compoenents. Biotic components refer to the living things whereas the abiotic components are the water, soil, air, and minerals.
2. Biotic factors are the living components of the ecosystem, which are plants, animals, and microorganisms.
3. Abiotic factors are the non-living components, which include moisture, temperature, air, and minerals.
4. Producers are the organisms that prepare food in the presence of light, water, and gases. These organisms are also plants or autotrophs.
5. Consumers are the organisms that feed on the producers to obtain energy. These organisms are known as heterotrophs.
6. Producers are the organisms that prepare food for the organisms. These are essential for the ecosystem as all organisms are dependent on each other and require food for survival.
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___The term "maintaining a level playing field" is related to the RCRA penalty policy.
2. ___A defendant in an environmental civil case faces possible prison time for violating a rule.
3. ___A notice of violation can result in a criminal or civil enforcement case seeking a monetary penalty.
4. ___A government agency inspector may legally collect evidence for use in a civil case from outside the property boundary of a regulated facility without obtaining permission to do so from the facility operator prior to collection of the evidence.
5. ___Three of the factors considered when calculating a monetary penalty are the potential for harm to human health and/or the environment; extent of deviation from the requirement and ability to pay for a defense attorney.
6. ___Oil spills under U.S. jurisdiction may be burned as a remedial action.
7. ___Metallic sulfide ores at mine sites cause surface water runoff that has low pH and high toxic metal concentrations.
8. ___A hazardous waste incinerator was stopped at Kettleman City, CA by residents alleging environmental discrimination.
9. ___The chemical cyclohexane, hazardous waste code U057, was released above the RQ on July 29, 2020 in Tempe, AZ.
10. ___The international symbol for biohazard is .
Answers
The term "maintaining a level playing field" is related to the RCRA penalty policy. The concept of "level playing field" is a significant component of the RCRA penalty policy.
The concept is that by ensuring equivalent enforcement and deterrence, the level playing field is maintained. In other words, the policy aims to make sure that the same punishment is imposed on all actors who violate the law. False. A defendant in an environmental civil case does not face possible prison time for violating a rule. True. A notice of violation can result in a criminal or civil enforcement case seeking a monetary penalty. A government agency inspector may legally collect evidence for use in a civil case from outside the property boundary of a regulated facility without obtaining permission to do so from the facility operator prior to collection of the evidence.
Three of the factors considered when calculating a monetary penalty are the potential for harm to human health and/or the environment; extent of deviation from the requirement and ability to pay for a defense attorney. These factors are considered when determining the amount of a monetary penalty in an environmental civil case. True. Oil spills under U.S. jurisdiction may be burned as a remedial action.True. Metallic sulfide ores at mine sites cause surface water runoff that has low pH and high toxic metal concentrations. True. A hazardous waste incinerator was stopped at Kettleman City, CA by residents alleging environmental discrimination.
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Label the male reproductive system.
Answers
Answer:
Refer the attachment!!!
Which statement best summarizes why the cell theory was developed over time?
A. As new cells evolved they proved the cell theory was inaccurate.
B. The discovery of new evidence resulted in changes to the cell theory.
C. Changes in cell models showed the cell theory was based on opinion.
D. The cell theory was modified with the discovery of every new organelle.
Answers
The statement 'the discovery of new evidence resulted in changes to the cell theory' best summarizes why the cell theory was developed over time.
The cell theory is a model in cellular biology that states all cells evolved from a pre-existing cell.This theory also states that all organisms are composed of cells.The cell theory was further modified as new evidence emerged in the scientific community.In conclusion, the statement 'the discovery of new evidence resulted in changes to the cell theory' best summarizes why the cell theory was developed over time.
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What contribution to energy do carbohydrates make?
Answers
Answer:
Carbohydrates are the nutrients most frequently used as an energy source (containing 4kcal per gram), as they are fast-acting and turn into energy as soon as they are ingested. This energy powers the brain and body. The energy that powers the brain and body is generated when carbohydrates are broken down.
Explanation:
hope its help
thank you
3. do you expect any patterns in the distribution of subspecies? why or why not?
Answers
The distribution of subspecies may display certain patterns based on various environmental factors, gene flow, migration, and geographical barriers. However, these patterns are not absolute and can vary depending on multiple variables and factors.
For example, environmental factors like climate, temperature, and rainfall can significantly impact the distribution of subspecies. Subspecies that are well adapted to certain environmental conditions may cluster around areas that have similar environmental conditions. Similarly, migration and gene flow can play a crucial role in the distribution of subspecies. Subspecies that can migrate quickly and efficiently can spread across a larger region, while those that are isolated may remain confined to smaller regions.The presence of geographical barriers can also impact the distribution of subspecies. Physical barriers like mountains, oceans, and deserts can limit the spread of subspecies and create distinct distributions.
However, the patterns that emerge from these barriers may not be absolute, and subspecies may occasionally cross these barriers due to human activity, climate changes, or other factors.In conclusion, while patterns may emerge in the distribution of subspecies based on environmental factors, migration, gene flow, and geographical barriers, these patterns are not absolute and can vary depending on multiple factors. An answer to the question in 120 words has been provided.
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Is anything currently being done to address these (the tropical rainforest) threats? If so, how well is this solution working? Please answer as soon as you can!
Answers
Efforts are being made to address threats to tropical rainforests, including deforestation, climate change, and habitat loss. Some of these solutions involve sustainable forestry practices, reforestation, conservation programs, and international cooperation.
1. Sustainable forestry practices aim to balance the need for wood products with the preservation of the ecosystem. This includes selective logging, reduced-impact logging, and certification programs like the Forest Stewardship Council (FSC).
2. Reforestation involves planting trees to replace those that have been cut down or destroyed. This helps to restore the ecosystem, absorb carbon dioxide, and support biodiversity.
3. Conservation programs work to protect rainforest habitats and species through the creation of protected areas, such as national parks and wildlife reserves. These efforts can help prevent habitat loss and promote biodiversity conservation.
4. International cooperation, such as the United Nations Framework Convention on Climate Change (UNFCCC) and the REDD+ program, brings countries together to address the global challenges of deforestation and climate change.
While these solutions are helping to mitigate some of the threats to tropical rainforests, more work is needed to ensure the long-term preservation of these valuable ecosystems. Continued efforts in education, policy-making, and international collaboration are crucial to achieving this goal.
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Our brains, nerves, and spinal cords are made up of specialized cells that you don't find anywhere else in
the body.
True or false?
Answers
Answer:
TRUE
Explanation:
Central to the functioning of the nervous system is an extensive network of specialized cells called neurons, There are basically two major types of nerves: sensory and motor. Sensory nerves send information such as touch, temperature, and pain to the brain and spinal cord., Sensory neurons carry nerve impulses from tissues and organs to the spinal cord and brain. Motor neurons carry nerve impulses from the brain and spinal cord to muscles and glands(see Figure below). Interneurons carry nerve impulses back and forth between sensory and motor neurons.
pls give me brainliest i really need it
and good luck on your work
Our brains, nerves, and spinal cords are made up of specialized cells that you don't find anywhere else in the body is a true statement.
What is brain?The brain, spinal cord, and a sophisticated nerve network are all parts of the nervous system. The brain and the body are communicated with via this system.
All bodily functions are managed by the brain. From the brain, the spinal cord descends via the back. It is made up of strands of nerves that branch out to every organ and area of the body.
The brain sends and receives messages via this network of nerves to many regions of the body.
Therefore, Our brains, nerves, and spinal cords are made up of specialized cells that you don't find anywhere else in the body is a true statement.
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Hey happy winter holiday! take some points fellow goblins also I hope you have a day and don't forget to eat something because your tum tum kinda hurts when your hungry and its not fun.
Answers
Answer:
Thank you! :) you are awesome and happy holidays to you!
Explanation:
Ya your stomach hurts when something else happens and that REALLY sucks lol!
Although its not really you stomach and more like intestines but still REALY sucks.
1. - Inherited traits are governed by
A hybrids
B genes
C purebreds
D fertilization
Answers
Answer:
Genes
Explanation:
Genes control traits. Hope this helped :)
Why does Darwin's Theory of Natural selection disprove Lamarck's Theory of inheritance of Acquired Characteristics? Answer in a short and clear answer
Answers
Lamarck's theory of Inheritance of Acquired Characteristics proposed that an organism experiences modification that can be transmitted to its offspring. However, Darwin's Theory of Natural selection disproved the Lamarckian theory. Many biologists have tested this theory (Lamarckian theory) and the result is, more evidence is being demonstrated that the traits and behavior of organisms were the results of natural selection; hence, these changes are mainly controlled by genes.
Which is not part of a myofibril?
ОООО
Muscle cell
Sarcomeres
Myosin
Actin
Answers
Answer:
As I think second option is the correct one.
Explanation:
The myofibrils are made up of thick and thin myofilaments, which help give the muscle its striped appearance. The thick filaments are composed of myosin, and the thin filaments are predominantly actin, along with two other muscle proteins, tropomyosin and troponin.
Why would blood volume play a role in the amount of time a mammal can stay under water?
Answers
Answer:
The answer is that they store oxygen in their blood, and in their muscles rather than in their lungs. Marine mammals have a very high blood to body volume ratio. The mammalian diving reflex allows mammals to lower their heart rate and ultimately survive submersion in water for extended periods of time.
Explanation:
The reason why blood volume played a vital role should be explained below.
Role of blood volume:In the case when the oxygen is stored in the blood & in their muscles instead of their lungs so this represents the role of blood volume. Also, marine mammals contain a high blood-to-body volume ratio. It permits the mammals for lowering the rate of heart and survive the submersion in the water for extension of the time. This is the main reason.
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Which of these are components of blood? (Select all that apply.)
oxygen gas
red blood cells
bile
platelets
Answers
Answer:
oxygen gas
red blood cells
platelets
Explanation:
» Concepts
Your blood is composed of four main things: red blood cells (that transport oxygen), white blood cells, platelets, and plasma. Red blood cells transports oxygen and takes out CO2, white blood cells fight bacteria and viruses, and platelets clot together to stop bleeding.
Bile is a fluid that is produced by the liver and stored in the gallbladder, so it's not a main component of blood.
pls help me with this question too
Answers
Answer:
(D)600
Explanation:
u approximate it
What is the significance of the fact that chromosomes condense before they are moved.
Answers
Answer:
This condensation is needed to allow the chromosomes to move along the mitotic spindle without becoming tangled or broken during their distribution to daughter cells.
if there was no glucose available for plant and animal cells what would happen?
Answers
Answer:
Glucose is a sugar that many plants, animals and fungi use for energy. In plants, glucose is produced as a result of photosynthesis. Plants need the energy glucose provides in order to grow and reproduce. ... Without glucose, plants would not have the energy necessary to grow, reproduce or carry out cellular respiration.
Explanation:
UwU Hope I helped
which anatomical part of the ear area of the ear contributes to benign paroxysmal positional vertigo
Answers
The posterior semicircular canal of the inner ear is the anatomical part that contributes to benign paroxysmal positional vertigo. Benign Paroxysmal Positional Vertigo (BPPV) is a common inner ear disorder that affects the patient's balance. The inner ear contains tiny calcium carbonate crystals (otoconia).
BPPV is caused by the displacement of these crystals from their original location within the utricle. They move into one of the semicircular canals, where they interfere with the flow of fluids. This interference leads to an abnormal sensation of dizziness or vertigo in patients.
The inner ear is divided into three semicircular canals: Anterior, Posterior, and Horizontal. These semicircular canals are interconnected by two other structures called utricle and saccule. BPPV is caused when otoconia crystals displace from their original location in the utricle and travel into one of the semicircular canals.
The Epley maneuver and the Semont maneuver are two common treatment methods used to treat BPPV. These maneuvers help to reposition the displaced otoconia crystals to their original location, providing relief to patients from dizziness or vertigo symptoms.
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