Lipids, after being broken down, are absorbed by cells in the intestine, reformed into chylomicrons, and are transported through the lymphatic system before they eventually enter the bloodstream. They do not, thus, enter the bloodstream directly after digestion.
Explanation:The statement 'lipids enter the bloodstream directly after digestion' is false. Lipids are indeed broken down during digestion, but they enter the bloodstream via a slightly indirect route. During digestion, triglycerides, a type of lipid, are broken down into smaller fatty acids and monoglyceride molecules in the intestine. These smaller molecules are then absorbed by absorptive cells called enterocytes in the small intestine.
However, unlike other nutrients such as amino acids and monosaccharides, lipids don't travel directly to the bloodstream. Inside the enterocytes, the fatty acids and monoglycerides are recombined to form triglycerides again, which are then packed into vesicles called chylomicrons. These chylomicrons are released from the enterocytes and enter lacteals, which are tiny lymphatic vessels present in the intestine.
From the lacteals, chylomicrons travel through the lymphatic system and eventually reach the bloodstream. It is in this way that lipids enter the bloodstream, but not directly immediately after digestion.
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Any change in allele frequencies in a gene pool is called ____ a. Natural selection b. macroevolution c. Microevolution d. Mutation e. Artificial selection
Changes within a gene pool occurring from generation to generation is called microevolution. Allele frequencies in a population may change due to gene flow, genetic drift, natural selection and mutation. These are referred to as the four fundamental forces of evolution.
C.
Final answer:
Microevolution is the change in allele frequencies within a gene pool over time, often evidenced by observable shifts in traits within a population. The correct option is C. Microevolution.
Explanation:
Any change in allele frequencies in a gene pool is called microevolution. Microevolution refers to changes in the gene pool of a population over time due to mechanisms like mutation, gene flow, genetic drift, and natural selection. Mutation and gene flow are evolutionary forces that can introduce new genetic variation into a population, while natural selection and genetic drift can alter allele frequencies by changing the relative survival and reproductive success of individuals with different genotypes.
Which of the following is not characteristic of an animal cell? A. It has a nucleus surrounded by a nuclear envelope B. It contains ribosomes C. It converts sunlight into food & energy using chloroplasts D. It has a cell membrane
I would say C. It converts sunlight into food & energy using chloroplasts.
Since that occurs in plat cells.
Hope it works!
The answer option which is not a characteristic of an animal cell is: C. It converts sunlight into food & energy using chloroplasts.
An animal cell can be defined as the fundamental (basic) functional, structural and smallest unit of life of an animal such as a cat, sheep, lion, dog, etc.
Basically, the cells found in the tissue and organs of animal are referred to as eukaryotic cells because they have membrane-bound organelles enveloped by a plasma membrane and suspended in the cytoplasm.
Some of the characteristics of an animal cell include the following:
It has a nucleus surrounded by a plasma membrane or nuclear envelope.An animal cell contains ribosomes.An animal cell has a cell membrane.However, a plant cell converts sunlight into food and energy through photosynthesis by using chloroplasts.
In conclusion, an animal cell doesn't convert sunlight into food and energy or experience photosynthesis.
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Where does the carbon dioxide in breath come from? What organisms use carbon dioxide to survive? Research the amount of carbon dioxide generally found in the air and in breath. Which has more carbon dioxide? What are some of the other sources of carbon dioxide in air? Based on your observations about the acidity of carbon dioxide dissolved in water, what ecological effects could be caused by excess carbon dioxide in the air?
The carbon dioxide in the breathed out air is a by-product of the process of cell respiration. In respiration, a molecule of carbohydrate is converted into a CO2, H20, and energy which is released in form of ATP.
Answer 2:All plants belonging to kingdom Plantae and plant-like organism like photosynthesizing bacteria need CO2 to survive. They use carbon dioxide in food making process, photosynthesis.
Answer 3:Amount of CO2 in the air: 0.03%Amount of CO2 in the breath: 4%Hence it is proved from above statistics that breath has more carbon dioxide than air.
Answer 4:There are two sources of CO2 in the air. Which are the following:
Human sources: It includes activities of human involvement and release of CO2 artificially as in cement production, deforestation as well as the burning of fossil fuels like coal, oil and natural gas.Natural sources: Release of CO2 by natural processes as in decomposition, ocean release and respiration.Answer 5:The major ecological effect is global warming.As CO2 is known as the greenhouse gas because it gives a greenhouse effect. Elevating concentration of CO2 in air forms a layer or sheath of CO2 over the earth which allows the entry of sun rays and stop it from reflecting back, trapping sun rays around earth increasing the temperature of earth day by day. It also causes plants to provide less evaporative cooling because in high concentration CO2 stomata shrink through which normally evaporation occurs when stomata are open.Answer:
Although CO2 is generally known as a dangerous and nocious gas, the truth is that without it, life would not be possible, both in plants and animals. CO2 plays a vital part in animals in the breathing pattern and too low amounts of it may also bring problems. Given this background, the answers to your questions, would be:
1. CO2 is one of the results of energy production in organisms. Usually, when an organism produces ATP, the energy molecule, it will consume certain chemicals (oxygen, hydrogen, carbon, and others) that when they react, end up generating certain products: water and CO2. This CO2 is then expelled by the lungs, at least in animals and humans. Plants, however, during daylight, use this gas for food production, and in nightime switch their systems to expel CO2. This is why sleeping with a plant can be dangerous.
2. Bacteria are capable of using CO2 and from it generating pure oxygen, water and other products. Also, plants, in general, especially photosynthetic ones, need CO2 for their energy production processes. Algae, is also capable of using CO2, and thus oxygenating the oceans. Finally, there are fungi also capable of using CO2 and producing oxygen and water.
3. As of 2019, the amount of CO2 present in our air was of 413.0 parts per million, an all-time high. In human breath, the amount of CO2 released is of 500 lt per person, and in total, per year, people in the world can release about 2500 million tons, about 7% of the total amount released into the atmosphere.
4. Animal breathing, as well as certain activities like burning coal, wood, animal and human waste, waste management, are all examples of activities outside of breathing, that cause CO2. Plant decay, and animal carcass decay will also release CO2 into the atmosphere.
5. Probably the biggest effect that excessive CO2 dissolved in water, bringing up acidity in it, has, is, the production of acid rain. This has also proven devastating for crop growth, and agricultural production, as well as animal raising. The second is the production of further greenhouse effects. As the water evaporates, releasing more CO2 into the atmosphere, the situation becomes even graver with time. Today, we are witnessing rainfall that damages entire fields because of its higher acidity, and changes in atmosoheric conditions due to this excessive CO2.
As the human population grows what happens to our natural resource resource requierments
need some help can anyone help me please what are white blood cells protect against blank and aid in blood clotting when injuries are sustained ???
I believe the answer is "pathogens".
"White blood cells protect against pathogens and aid in blood clotting when injuries are sustained."
Ans.
White blood cells (WBCs) or leukocytes are immune cells that are associated with protection of body against foreign invaders (pathogens) and infectious diseases. These cells include neutrophils, eosinophils, basophils, B cells, T cell, and NK cells.
These cells migrate to the site of injury to prevent infection and entry of pathogens from broken skin. The B cells generate specific antibodies for particular pathogens and help in killing pathogens with the help of other immune cells, such as T cells.
Thus, the correct word to be filled in the blank is 'pathogen.'
Which dissolved substance do aquatic animals remove from their external environment for use in cellular respiration
Answer:
The correct answer would be oxygen.
Cellular respiration is the process of producing energy in the form of ATP by oxidation of the food (particularly carbohydrate or glucose).
Oxygen is one of the most important component required for complete oxidation of the glucose.
It is the final acceptor of the electron in the electron transport chain. It gets reduced to water.
Glucose + oxygen → carbon dioxide + water + ATP (approx 38).
Animals living on land gets their oxygen from the air they breathe in and animals living in the water extract dissolved oxygen from the surrounding water.
Fishes have specialized structures called gills which help them in extracting maximum amount of dissolved oxygen from the water.
Explain how genes are expressed for a particular reason
Each cell expresses, or turns on, only a fraction of its genes. The rest of the genes are repressed, or turned off.
The turned on genes are then first transcribed into messenger RNA by the process of Transcription.
Then the mRNA is Translated into protein by the process called Translation.
This is how the specific genes are expressed.
The image shows a food web in a marsh ecosystem.
In this ecosystem, pollution and human activities have caused a rapid decrease in the population of eagles. At the same time, a virus has caused the population of rabbits to decline. Based on this information, what changes are most likely to occur in the ecosystem?
A.) The population of frogs will decrease because of increased predation by snakes.
B.) The population of storks will increase because of decreased competition with eagles.
C.) The population of gnats will decrease because of a decrease in the amount of grass available.
D.) The population of grass will decrease because of increased predation by rabbits.
E.) The population of snakes will increase because of decreased predation by eagles.
Answer: E.) The population of snakes will increase because of decreased predation by eagles.
A food chain is a linear sequence of transfer of food and energy, when one organism is consumed by another organism in an ecosystem. The energy is distributed among various trophic levels of the food chain. The organisms in the higher trophic levels consume organisms in the lower trophic levels.
In the given situation, the decline in the eagle population due to human activities and pollution will increase the population of the organisms lying in the lower trophic levels such as stock and snakes which the eagle used to obtain as a source of food.
Answer:
A.) The population of frogs will decrease because of increased predation by snakes. and E.) The population of snakes will increase because of decreased predation by eagles.
Explanation:
Probably the most important value of a graph is to show
relationships
differences
variations
Graphs are valuable because they show relationships, differences, and variations in data.
Explanation:The most important value of a graph is to show relationships between different variables or quantities. Graphs can visually represent how one variable changes in relation to another, allowing us to understand patterns and trends. They can also highlight differences or comparisons between different groups or categories. Additionally, graphs can illustrate variations in data, such as the spread or distribution of values.
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A population of foxes inhabits a small forest. The size of the population is currently below the forest's carrying capacity for the foxes. Which factor could cause an increase in the population's growth rate?
A. The population's level of immigration falls below it's level of emigration.
B. The population's birth rate falls below it's death rate after a predator is introduced.
C. An increase in food availability increases the birth rate in the population.
D. A lack of mating opportunities increases the populations level of emigration.
PLATO
A.
The population's birth rate falls below its death rate after a predator is introduced.
B.
A lack of mating opportunities increases the population's level of emigration.
C.
An increase in food availability increases the birth rate in the population.
D.
The population's level of immigration falls below its level of emigration.
Answer: C. An increase in food availability increases the birth rate in the population.
Explanation:
The carrying capacity of an ecosystem can be defined as the maximum size of a population of a species an ecosystem can support on the basis of availability of resources such as food, water, habitat and other requirements.
An increase in food availability increases the birth rate in the population. is the correct option because to increase the population till the carrying capacity there must be surplus supply of food should be available to the population which can support in increase in birth rate so that the population can attain a level at the carrying capacity.
50 POINTS FOR DOING THIS!!!!!!!
What inferences can you make regarding the ph of a particular part of the digestive system and the type and relative size of the carbon-based molecules that are broken down there?
AND
the stomach is a relatively small muscular organ compared to the small intestine that can be as long as six meters yet food tends to be held in the stomach and released in only small amounts into the small intestine. What does that suggest to you about where nutrients are absorbed? How do the products of enzyme action described in the table support your thinking?
1.The pH of a particular part of the digestive system can give an approximate value about the acid content present in it. Which can help to determine the solubility of bacterias present in it. It also helps in protein denaturation process also. It helps to break down the carbon-based molecules and releases the energy for performing various activities.
2.im not sure
The pH of different parts of the digestive system indicates the type of molecules broken down in those areas. The stomach's acidity aids in protein breakdown, while the small intestine's basic environment facilitates digestion of various nutrients. The longer food stays in the stomach, with gradual release into the small intestine, shows the stomach's role in initial digestion, while the small intestine is where most nutrient absorption occurs.
Explanation:The pH of a particular part of the digestive system can give inferences about the type and relative size of the carbon-based molecules that are broken down there. For example, the stomach has a low pH, indicating it's acidic. This acidity is crucial for the denaturation of proteins and activation of the enzyme pepsin, which breaks down proteins into smaller peptides. In contrast, the small intestine has a higher pH which allows for the digestion of fats, sugars and the remaining proteins.
The fact that food stays longer in the stomach and is only gradually released into the small intestine suggests that the stomach plays a significant role in the initial breakdown of food, but absorption of nutrients primarily occurs in the small intestine. The enzymes present in the small intestine, such as amylase, lipase, and peptidases, facilitate the breakdown of complex molecules into simpler ones for easy absorption.
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Which of the following are true regarding ores?
I. Ores can be metallic.
II. Ores can be nonmetallic.
III. Ores consist of minerals.
IV. Materials removed from ores are useful.
The statements 1-4 are true
Ores can be metallic or nonmetallic, and consist of minerals, and materials extracted from them are often useful.
Explanation:All statements (I., II., III., & IV.) are true about ores. Ores can indeed be metallic, such as iron ore or copper ore, but they can also be nonmetallic, such as quartz ore or limestone. The bulk of ores are made up of minerals, which are naturally occurring substances with a defined chemical composition and a crystalline structure. Materials extracted from ores, like metals and nonmetals, are often valuable resources used in various industries.
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According to the frontier ethic, saving endangered animal species may be considered foolish because _____.
A. animals cannot be controlled
B. animals serve no human purpose
C. extinctions occur as a natural process
D. new species will take their place
From the perspective of the frontier ethic, saving endangered animal species may be seen as unwise because extinctions are seen as a natural process that should not be impacted by human actions.
Explanation:The frontier ethic is a philosophy that encourages use and progress, often at the expense of conservation. It reflects the attitude of pioneers who considered the natural world as a resource to be used for human benefit. Given this outlook, the answer to your question - According to the frontier ethic, saving endangered animal species may be considered foolish because C. extinctions occur as a natural process. This perspective sees extinction as an inevitable part of nature's course which should not be interfered with by human effort to save animals.
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Which species populations would decrease if the temperature of the stream increased
Final answer:
Cold-water species like trout and organisms in their food chain would decrease if stream temperatures increased, due to less dissolved oxygen and changes in flow regimes from human activities.
Explanation:
The species populations that would decrease if the temperature of a stream increased are primarily those of cold-water organisms, such as trout, and the species within the food chains they depend on. An increase in stream temperature can lead to decreased levels of dissolved oxygen, which is critical for the survival of many aquatic species. Additionally, species that are adapted to seasonal changes in flow might also decline due to alterations in flow regimes caused by human activity such as damming. The examples provided illustrate how various species are sensitive to temperature changes and resultant habitat modifications, signaling a broader impact of climate change on freshwater ecosystems.
Ecological succession is typically a _______ process through which a developing ecosystem becomes _______ stable.
Ecological succession is typically a gradual process through which a developing ecosystem becomes less stable.
Ecological succession is the observed process of change in the species structure of an ecological community over time. The time scale can be decades, or even millions of years after a mass extinction.
Answer:
gradual; more
Explanation:
study island
Interpreting the results of an experiment requires critical thinking skills and the ability to make connections across data. Which skill would most likely benefit a scientist who is doing this?
Creativity
Inflexibility
Time management
Memorization
The correct answer is option Memorization.
The memorization of the data help the scientist to recall all the facts and the theories, which are related to the experiments. In case, a scientist remembers all the things, the analyzing the data would be easier, as he can relate the data without referring to many sources. Hence, memorization would be very helpful in making connections across the data.
Creativity is the most beneficial skill for scientists interpreting experimental results, as it allows for the synthesis of information and development of innovative solutions.
When interpreting the results of an experiment, creativity is a crucial skill for scientists. It encompasses the ability to synthesize diverse pieces of information, develop original thinking, and devise innovative solutions to problems. Such inventive thinking skills fall within the domain of critical thinking and problem-solving abilities. Creativity leads to the generation of new insights and approaches, potentially contributing to scientific breakthroughs.
While time management and memorization are significant, they are more procedural skills that relate to efficiency and knowledge retention, respectively. Inflexibility could hinder a scientist's ability to adapt to new data or perspectives, which is crucial in a dynamic and often unpredictable field like research. Therefore, out of the options provided, creativity stands out as the most beneficial to a scientist engaged in interpreting experimental results.
Most of the nitrogen in the atmosphere is found in what form?
as ammonium
as nitrite
as nitrogen gas
as nitrate
Answer:
as nitrogen gas :)
Explanation:
What percent of germany’s land is arable? (. From the european natural resources chat; enter a number in numerical form.)
In Germany, the arable land was reported at approximately 34 percent in 2015, on the basis of the World Bank collection of developed indicators, compiled from officially recognized sources.
The arable land comprises land defined by the Food and Agriculture Organization as land under temporary crops, land under market or kitchen gardens, temporary meadows for mowing or for pasture, and land temporarily fallow. However, land abandoned due to shifting cultivation is excluded.
Answer:
the answer to the question is 34.1
Explanation:
Why doesnt plants and bacteria expand when it reaches water
When the plants and bacteria reach water, they get into a hypotonic solution means, the concentration of solutes is greater inside the cell than outside of it. When the plant and bacteria are placed in water, they take up water by osmosis and starts to swell, but the cell wall prevents it from bursting. The plant cell become turgid. Turgidity means the cells are swollen and hard. The increase in pressure makes the cell rigid. This is why they do not expand and burst.
What part of the body conatins bile, an enzyme that helps break down lipids
Condensation is an important phase change that commonly occurs in the atmosphere. suppose a 1-m3 sample of air at sea-level pressure, containing 4 g of water vapor, was cooled such that all 4 g condensed. how many calories of heat would be released by this process?(carbone 48)carbone, greg. exercises for weather & climate, 9th edition. pearson, 20150626. vitalbook file.the citation provided is a guideline. please check each citation for accuracy before use.
The correct answer is 2400 calories.
The condensation is a process of water’s state change. It is the change from water vapor to liquid state. The latent heat of condensation will release about 600 calories per gram of liquid water. So, it means that for 4 grams of liquid, 2400 calories of heat is necessary.
The calories of heat that would be released by this process is 2400 Calories or approximately 2.4 Kcal.
What do you mean by Condensation?
Condensation may be defined as the change of state of matter from the gas (vapor) state into the liquid state.
The latent heat of condensation is defined as the heat released when one mole (gram) of the substance condenses.
The latent heat of condensation when 1 g of substance condenses = 600 cal.
So, the latent heat of condensation when 4 g of substance condenses = 4×600 = 2400 cal or ≅ 2.4 Kcal.
Therefore, the calories of heat that would be released by this process is 2400 Calories or approximately 2.4 Kcal.
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Carrying capacity relates to a population of organisms in an ecosystem. What do you think the term carrying capacity means? What factors could influence it?
PLATO
A population is the number of organisms of a particular species that live in an area. The carrying capacity is the maximum number of individuals of a particular species that a region can support. Carrying capacity would greatly depend on what resources are available for that particular species.
Answer: Carrying capacity would be the limit of organisms allowable. Food and any other resources would influence what the capacity would be.
Explanation:
Which three sciencetists directly contributed to the ''all organims are composed of cells'' part of cell theory
(APEX) How does groundwater form?
A. Water is pumped from a water-table well.
B. Water exits the ground through a spring.
C. Water seeps into spaces between rocks.
D. Water is pored down an artesian well.
C. Water seeps into spaces between rocks.
Groundwater is formed when water seeps into spaces between rocks.
What is groundwater?"Groundwater is the water that exists beneath the Earth's surface within the pore spaces of rocks and soils, as well as within the cracks of rock formations." Precipitation provides the bulk of groundwater. Precipitation seeps into the soil zone beneath the bottom surface. Water percolates downward when the soil zone becomes saturated. When all of the interstices are stuffed with water, this can be referred to as a saturation zone. Springs and wells are samples of groundwater sources that are located beneath the land surface.When rain falls to the planet, some water runs along the land to streams or lakes, some evaporates into the atmosphere, some is taken up by plants, and a few seeps into the bottom (hydrologic cycle).
Hence, the correct option is C. Water seeps into spaces between rocks.
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What makes human dna different from oak tree or frog DNA?
oak tree DNA is much longer than that in human and the number of chromosomes also differ
Answer:
Nucleotide arrangement
Explanation:
There are obvious differences between humans, oak trees and frogs, but at the molecular level- the cells of all eukaryotes including plants and animals contains DNA in the same shape (double-helical).
All DNA molecule consists of two long polynucleotide chains composed of four types of nucleotide subunits (A, G, C, T). Each of these chains is known as DNA strand. The difference between species lies in the arrangement of the nucleotide bases in the DNA of respective organisms.
The sequence of nucleotides determines which proteins will be synthesized. The way the nucleotides (Adenine, Guanine, Cytosine and Thymine) are arranged determines the information they encode, this information ultimately determines whether the organism will produce scales(frogs), leaves (oak plant) or legs (humans).
Which weathering process is mechanical? A. Solution B. Carbonation C. Thermal expansion D. Hydration
The answer is Thermal Expansion
The North Atlantic right whale was classified as an endangered species in 2015. A major cause of death for these whales is collisions with shipping vessels. Several measures have been enacted to prevent such collisions in regions with a high abundance of right whales. In 2002 and 2006, shipping vessel lanes were rerouted around some of these regions. In 2008, speed restrictions were placed on the shipping vessels that were permitted to travel through these regions.
The graph below shows the estimated abundance of North Atlantic right whales from 1990 to 2015. The years in which these measures were enacted are marked on the graph.
What conclusion is best supported by the data in the graph?
A. Modifying shipping lanes is the most effective method of encouraging population growth in right whales.
B. Limiting shipping vessel speeds is the most effective method of preventing population decline in right whales.
C. Changes to vessel speeds and lanes have been effective in preventing population
declines in the right whale population, and no further actions are needed.
D. While changes to vessel lanes and speeds may have been beneficial to right
whales, additional actions are needed to prevent population declines.
Answer:
While changes to vessel lanes and speeds may have been beneficial to right whales, additional actions are needed to prevent population declines.
Explanation:
As you can see from the graph, both those things were beneficial, but around 2009 you can see that the population began going down again. This means that the effects were obviously good, but that more actions should be taken in order to ensure that the right whales thrive even more since for the first time in 20 years they began going back down.
Where are the instructions for all of the cell processes found in a eukaryotic cell?
i need that one too please
Jayden has been given 5 cubic centimeters each of 4 unknown samples of gaseous substance. He has been asked to identity which one is hydrogen. Sample A 0.00036, Sample B 0.000018, sample C 0.00045, D 0.000022. If the density of hydrogen is 0.00009 g/cm^3, which of the unknown is hydrogen.
Sample-C is the hydrogen.
Solution:Data Given:
Volume = 5 cm³
Mass of Sample-C = 0.00045 g
Reference Density = 0.00009 g/cm³
Formula Used;
Density = Mass / Volume
Density = 0.00045 g / 5 cm³
Density = 0.00009 g/cm³
Answer: I can cofirm that it is C.
Explanation:
What is the vocabulary term that describes the first organisms to begin succession
The vocabulary term that describes the first organisms to begin succession is pioneer species.
Pioneer species are hardy species (plants that can withstand the extremes of climate or habitat) which are the first organisms to colonize an already damaged or disturbed ecosystem. Pioneer species include lichen, algae and fungi. These species are the first organisms to begin succession, and they normalize the habitat along with abiotic factors such as temperature, water, sunlight, wind and nutrient availability.
The vocabulary term that describes the first organisms to begin succession is "pioneer species."
Pioneer species are hardy species that are the first to colonize previously disrupted or damaged ecosystems. They are capable of surviving in harsh conditions that would be inhospitable to other species. These organisms initiate the process of ecological succession by creating soil and modifying the environment, which eventually allows for a more diverse set of organisms to inhabit the area. Over time, as the environment changes, these pioneer species may be outcompeted by other species that are better adapted to the new conditions. This gradual replacement of species is a key characteristic of ecological succession, leading to a more complex and stable ecosystem.