The carbon dioxide in the chloroplasts of green plants is used for photosynthesis.
Plants are called primary producers because they are able to harness the energy from the sun in making their own food via a complex process called photosynthesis.
During photosynthesis, energy from the sun is used to combine carbon dioxide and water in order to form glucose. The glucose units join together to form a complex molecule called starch.
The starch is broken down in animals when they eat plants to produce energy.
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The presence of bright red blood in the stool is known as _____.
a. steatorrhea
b. melena
c. hematemesis
d. hematochezia
The answer is letter d. Hematochezia. Most rectal bleeding comes from the colon, rectum, or anus and can be connected with diarrhea. Hematochezia is the passage of fresh blood through the anus, usually in or with stools. Hematochezia is also known in medical term as rectal bleeding often associated with a stool and blood clots.
Although estrogen is primarily produced by ovaries, it is also produced by the adrenal glands and in fat tissue. loss of the normal amount of fat lowers the level of estrogen so that the menstrual cycle and ovulation stops. female olympic athletes who train severely often shut off their cycles. what would be a reasonable evolutionary cause of this shutdown?
Final answer:
The shutdown of the menstrual cycle and ovulation in female athletes with low body fat and estrogen levels is an evolved adaptation to prevent pregnancy during times of physical stress or low energy reserves, as a way to conserve energy and ensure the mother has sufficient resources for a successful pregnancy.
Explanation:
The evolutionary cause of the shutdown of the menstrual cycle and ovulation in female Olympic athletes who train severely and experience a significant loss of body fat can be understood as a protective mechanism. The body requires a considerable amount of resources to maintain a pregnancy, and during periods of extreme physical stress or when energy reserves are low, it may not be advantageous for reproduction to occur.
If the body senses that it is not in an optimal state for supporting a pregnancy due to low levels of estrogen and fat tissue, it may shut down the reproductive cycle to conserve energy and prevent a pregnancy that could be risky for both the mother and potential offspring.
This response is likely an evolved adaptation to increase overall reproductive success by ensuring that pregnancy occurs only during times when the mother has sufficient resources to support both herself and the developing fetus.
Some people think that putting plant roots underwater will allow the plant to absorb all of the water it needs. if you do this to most plants, however, it will kill them. why
If analogous structures are often examples of convergent evolution,what types of structures would likely be examples of divergent evolution
Final answer:
Structures that would likely be examples of divergent evolution are homologous structures, which have a common evolutionary origin but may function differently in various related species.
Explanation:
If analogous structures are often examples of convergent evolution, the types of structures that would likely be examples of divergent evolution are homologous structures. While analogous structures are the result of convergent evolution, where different species develop similar traits independently due to similar environmental pressures, homologous structures have a common evolutionary origin but may have different functions in their present forms.
For instance, the forelimbs of humans, whales, and bats are considered homologous structures. They all share a common ancestral limb but have diverged over time to perform different functions aligned with the needs of the respective species—hands for manipulation in humans, flippers for swimming in whales, and wings for flying in bats. This divergence in structure and function among closely related species exemplifies divergent evolution.
When species interact, as fungi and algae do in lichen, so that the interaction of the two species increases the fitness of both species, this is called __________?
How is the function of dialysis tubing similar to the small intestine?
The function of dialysis tubing is similar to the small intestine due to their shared role in the absorption of materials. Just like the small intestine absorbs nutrients from food into the bloodstream, dialysis tubing enables the transfer of certain substances. Both heavily rely on the process of osmosis for their functioning.
Explanation:The function of dialysis tubing is similar to the small intestine in the aspect of absorption of materials. For instance, the small intestine, with its villi and microvilli, allows for the nutrients to be absorbed from the digested food into the bloodstream. It increases the surface area for increased absorption efficiency, which is the same principle the dialysis tubing operates on.
The dialysis tubing is semi-permeable, allowing for certain substances to pass through, while keeping larger substances within. Similarly, the small intestine absorbs nutrients from the chyme while leaving larger, indigestible food residue to be passed into the large intestine.
Moreover, both the small intestine and dialysis tubing depend heavily on the process of osmosis for their functioning. The small intestine absorbs most of its water via osmosis, just as the dialysis tubing relies on osmosis to filter out waste products from the blood during dialysis treatment.
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Why do microbiologists need to isolate bacterial colonies from a specimen? quzilet?
Specimens taken from a patient sample usually contain a mixture of different bacteria. But sample with only one type of bacteria, are necessary to study a bacterial species accurately. Therefore, it is necessary to isolate all of the possible disease causing organisms in order to study the sample by itself. Once isolation of individual colonies is done, then these colonies can be used for identification tests. A sample of the specimen is move very fast onto an agar plate in order to physically separate the bacterial colonies.
How is energy from sunlight used to make sugar molecules?
Light, H2O, and CO2 are converted into energy and sugar in leaf chloroplasts . Water converts sunlight into plant cell energy-storing molecules. These molecules generate glucose from CO2.
What is photosynthesis?In the process known as photosynthesis, plants convert light, water, and carbon dioxide from the air into oxygen and sugar, which can then be used as a source of energy.
The process of photosynthesis can be broken down into two separate steps. During the light processes, the energy from sunlight is used as a driving force, which results in the synthesis of ATP and NADPH, as well as the creation of O2 from H2O. The light reactions produce ATP and NADPH, which are then used in the dark reactions to power glucose production. The dark reactions get their name from the fact that they do not require sunlight.
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Trevor examines some water from the open ocean and finds that it contains several single-celled and multi-celled organisms. What term should Trevor use to describe the organisms based on their method of locomotion?
Answer:
Pelagos
Explanation:
It is the correct answer on pluto
What is the specific function of the structure labeled f?basic motor reflex pathways.what is the specific function of the structure labeled f?basic motor reflex pathways.determination of muscle tension increasing tension of the surrounding muscle increasing tension of the antagonistic muscle determination of muscle length?
Motor reflex pathways, the structure labeled f, regulates reflex reactions to stimuli like physical contact, maintaining muscle length, and adjusting muscle tension according to these sensory inputs.
Explanation:The specific function of the structure labeled f, the basic motor reflex pathways, refers to the mechanism that allows for reflex actions to occur. This includes the motor neuron pathway linking the sensory fibers in the spinal cord to the muscle. When a stimulus prompts a reflex action, such as a muscle stretch, the motor neuron of the muscle communicates this stimuli, triggering a response. For instance, when your knee is struck with a rubber hammer during a physical exam, the stretch reflex activates a muscle spindle receptor, causing the direct contraction of your muscles. Essentially, these pathways help to maintain muscle length and regulate muscle tension.
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Water diffusion through a ____________ cell membrane is made easier by membrane proteins called aquaporins.
Water diffusion through a hydrophobic cell membrane is made easier by membrane proteins called aquaporins. The correct answer is hydrophobic.
Plasma - membrane separates the inner and outer environment of the cell. It provides protection to the cell. It has hydrophobic region tails.
Some cell's plasma - membrane contain the water channels known s aquaporins by which the water molecules easily cross the membrane than the phospholipid membrane.
Aquaporins functions in transporting the water molecules in and out of the cell without disturbing the passage of the other ions.
So, the correct answer answer is hydrophobic.
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Final answer:
Water diffusion through cell membranes is facilitated by proteins called aquaporins that increase the efficiency of water transport via osmosis. These proteins are essential for maintaining cellular water balance and have been linked to various genetic diseases. Aquaporins are an example of facilitated diffusion and can also help transport other small molecules.
Explanation:
Water diffusion through a semi-permeable cell membrane is made easier by membrane proteins called aquaporins. Aquaporins are specialized channel proteins that facilitate the rapid transport of water across the cell membrane, contributing to the process known as osmosis. While water can passively diffuse through a membrane, aquaporins increase the rate at which water moves in response to a concentration gradient. This is an example of facilitated diffusion, and aquaporins can also help the transport of other small molecules and ions in addition to water.
Aquaporins are essential for maintaining the water balance within cells and are so significant that their discovery led to a Nobel Prize in Chemistry for Peter Agre. Mutations in aquaporin genes have been linked to various genetic diseases, emphasizing their importance in biology. These proteins are also allosterically regulated allowing cells to adjust water permeability according to their specific needs
in figure 33-6 what structure is labeled a? what is the role of the delicate network?
The diagram shows the respiratory structure of humans and their structures. Label A in the diagram is alveoli surrounded by B. bronchioles, C. diaphragm, and D. bronchi,
What is the respiratory system?A respiratory system is an organ system that enables the inhalation and exhalation of the gases. Many parts like bronchi, bronchioles, ribs, diaphragm, alveoli and sacs make the respiratory system.
Alveoli are the essential part of the respiratory system that is the region of the exchange of carbon dioxide and oxygen gases. The network of the capillaries around it allows the exchange of gases from the bloodstream.
Therefore, the label A is the alveoli of the respiratory system.
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The spoon is too hot after sitting in the hot soup. is this an example of conduction, convection, or radiation? why?
describe at least two ways that carbon can get from land plant to the atmosphere ?
Carbon can transition from land plants to the atmosphere through processes like respiration and decomposition. Decomposers break down dead organic material, releasing carbon to the soil and then to the atmosphere when they respire. Additionally, burning fossil fuels releases stored carbon as carbon dioxide into the atmosphere.
Explanation:Carbon can transition from land plants to the atmosphere in multiple ways. The first route is through the process of respiration. During this process, both plants and animals exhale carbon dioxide (CO2), which is returned to the atmosphere. The CO2 is produced as a byproduct of breaking down glucose for energy. Secondly, when plants and animals die, decomposers like fungi and bacteria decompose the organic material, returning carbon to the soil. This carbon can then be released into the atmosphere as carbon dioxide when these decomposers respire.
The burning of fossil fuels is another method which releases carbon into the air. Fossil fuels, like coal and oil, contain carbon that has been stored in the ground for millions of years. When these fuels are burned for energy, the stored carbon is released as carbon dioxide into the atmosphere.
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4) Thanks to the development of transgenic plants, much of the food we eat has been altered so that it tastes better, looks better, and lasts longer. This change in agricultural production has lead to new careers in
A) embryology.
B) forensics.
C) genetics.
D) geology.
5) Advancements in the area of agriculture has started to depend on technology sources for better yield and technology advancements have helped in the areas of irrigation, and drainage. Even the packing, processing, and marketing of agricultural products are also the activities which are influenced by science.
The progress of agriculture technology and the improvements of farming have come from many fields of knowledge. Identify from where some of the contributions to agriculture where received.
A) science
B) machinery
C) biotechnology
D) biotechnology, machinery, and science
6) Advancements in nuclear science have led to new technology which have been beneficial to society. Many of the advances are used in medicine. Which is not a medical use of nuclear energy?
A) nuclear fusion
B) radioimmunotherapy
C) magnetic resonance imaging (MRI)
D) positron emission tomography (PET)
Why are humans important to the life cycle of malaria parasites?
Molecules tend to move from an area of high concentration to an area of low concentration in a process known as
A diet high in ________ is linked to high rates of colon and prostate cancer. fat and meat nitrosamines
Homeostasis is the process of maintaining a stable internal environment in the body. what is the term that defines the targeted value to be maintained?
What is the muscular organ that holds the developing embryo?
Which of the following reasons best explains why a scientist would want to study rock formations and living organisms in previously unexplored water habitats?
A.
to discover new aspects of the natural world
B.
to explain recently observed phenomena
C.
to test the predictions of current theories
D.
to test the conclusions of prior investigations
The correct answer is option (A) to discover new aspects of the natural world.
The study of rock formations and living organisms in previously unexplored water habitats helps a scientist to discover the newer aspects of the natural world. The unexplored water habitats are the best source to understand the newer aspects of the aquatic bodies like the new species of plants or animals, factors affecting the aquatic life and the different types interactions in the habitats. The study of rock also helps in the study of plants and animals, which were once a part of the habitat, now in the form of fossils.
Thus, the study of rock formations cannot explain the recently observed phenomena as they help in the study of fossils. The study of living organisms in previously unexplored water habitats cannot be applied to test the conclusions of prior investigations and test the predictions of current theories as they remained unexplored.
Which kingdom includes the organism that causes lyme disease monera protista?
The kingdom that includes the organism that causes Lyme disease would be monera.
What causes Lyme disease?Lyme disease is caused by bacteria in the Borrelia genus. The genus includes both burgdorferi and mayonii species.
Bacteria generally belong to the kingdom of organisms known as Monera. The kingdom is made up of unicellular organisms that are prokaryotic in nature. The cells of organisms in this kingdom lack nucleus as well as membrane-bound organelles.
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The eastern meadowlark and the western meadowlark are two closely related bird species. the two species avoid interbreeding because they have different mating songs. this is an example of -
The answer is behavioral isolation
Describe how mitochondria and atp are related to cellular respiration.
What role did mycorrhizae play in the transition of plants to land?
The daily value for protein is ____ grams per day.
The plankton in the ocean ingested mercury that was in the water. a small fish ate the plankton. a larger fish ate the smaller fish that had eaten the plankton. marcus ate the large fish that had eaten the smaller fish. this reflects __________.
The ______________ in the brain subconsciously provides timing and patterns of smooth movement of skeletal muscle and aids in maintaining posture and balance.
A population of bacteria is treated with hand sanitizer. Because of genetic variation in the population, what is the possible outcome?
A. All of the bacteria are already resistant
B. They will get better at obtaining a food source
C. The population will grow quickly
D. Some of the bacteria may be resistant and survive.
Answer:
D. Some of the bacteria may be resistant and survive.
When a population of bacteria is exposed to hand sanitizer, due to genetic variation among the bacteria, a possible outcome is that some of the bacteria may be resistant and survive. Hence, the correct option is D.
This scenario highlights the principle of natural selection, where genetic variations that offer a survival advantage in a specific environment are more likely to be passed on to future generations. Given that resistance to sanitizers or antibiotics in bacteria is caused by specific genes already present in the gene pool of the bacteria, applying a sanitizer selectively kills those without resistance, thereby allowing only resistant individuals to survive and reproduce. This does not mean the bacteria become overall stronger or better at obtaining food sources, nor does it imply that the entire population will grow quickly. Instead, the population will evolve over time to have a higher proportion of individuals with the resistant gene, as it is the key trait that enables survival and reproduction in the presence of hand sanitizer.
What could be an additional trial to determine the effect of salt on plant growth