Describe one way the student could change the intensity of light reaching
the pondweed.
Answers
Answer:
The student could move the lamp further away from the pondweed, for low light intensity. For high intensity, the student should move them lamp closer to the pondweed.
Explanation:
Hope this helps!
Related Questions
data from j. m. teal, energy flow in the salt marsh ecosystem of georgia, ecology 43:614-624 (1962). how efficient is energy transfer in a salt marsh ecosystem? in a classic experiment, john teal studied the flow of energy through the producers, consumers, and detritivores in a salt marsh. in this exercise, you will use the data from this study to calculate some measures of energy transfer between trophic levels in this ecosystem. teal measured the amount of solar radiation entering a salt marsh in georgia over a year. he also measured the aboveground biomass of the dominant primary producers, which were grasses, as well as the biomass of the dominant consumers, including insects, spiders, and crabs, and of the detritus that flowed out of the marsh to the surrounding coastal waters. to determine the amount of energy in each unit of biomass, he dried the biomass, burned it in a calorimeter, and measured the amount of heat produced. part a - making calculations from the data what percentage of the solar energy that reaches the marsh is incorporated into gross primary production? Into net primary production? (A proportion is the same as a percentage divided by 100. Both measures are useful for comparing relative efficiencies across different ecosystems.) How much energy is lost by primary producers as respiration in this ecosystem? How much is lost as respiration by the insect population? If all of the detritus leaving the marsh is plant material, what proportion of all net primary production leaves the marsh as detritus each year?
Answers
Answer:
Explanation:
Teal's study of the salt marsh ecosystem in Georgia provides information about the efficiency of energy transfer between trophic levels in this ecosystem. Here are the calculations based on the available data:
Gross primary production (GPP) = 10,100 kcal/m2/year
Net primary production (NPP) = 5,900 kcal/m2/year
Percentage of solar energy incorporated into GPP = (GPP / Solar energy input) x 100 = (10,100 / 208,000) x 100 = 4.86%
Percentage of solar energy incorporated into NPP = (NPP / Solar energy input) x 100 = (5,900 / 208,000) x 100 = 2.83%
Energy lost by primary producers as respiration = 3,200 kcal/m2/year
Energy lost by insect population as respiration = 1,400 kcal/m2/year
Proportion of NPP leaving the marsh as detritus = (Detritus production / NPP) = 2,100 / 5,900 = 0.36 or 36%
Overall, the efficiency of energy transfer in this salt marsh ecosystem is relatively low, with less than 5% of the incoming solar energy incorporated into GPP. The majority of energy is lost through respiration, and a significant proportion of NPP leaves the marsh as detritus.
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Malika is writing an essay about the Sun. Below is the first paragraph in the essay.
The Sun is an average-size star that is located at the center of the solar system. This hot, glowing ball of gas has a diameter of 1,393,000 km. This means 109 Earths would fit side by side across the diameter of the Sun. At the surface, the Sun’s temperature is about 550 degrees Celsius. Earth is located just under 150 million kilometers from the Sun.
Malika quickly realizes this paragraph contains an error. Which statement identifies the error?
The Sun is a large star, not an average-size star.
The Sun is not a glowing ball of gas—it is solid.
The Sun’s surface temperature is about 5500 degrees Celsius.
Earth is located over 300 million kilometers from the Sun.
Answers
At the surface, the Sun’s temperature being about 550 degrees Celsius is the error in the statement.
What is Sun?This is defined as a type of star in which Earth and the other parts of the solar system revolve around.
It has a high temperature of around 1 million celsius on the surface which is why option C was chosen.
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Would any sound be heard when cuff pressure was 72 mm Hg?
Answers
Step by step explanat:
This is because at this pressure, the blood flow through the artery is completely occluded, which means that there is no sound of blood flow that can be heard with a stethoscope. This pressure is typically used as the starting point for measuring blood pressure using the auscultatory method.
how you can contribute and help to solve the problem on water crisis at present and in the future
Answers
Answer:
share water
Explanation:
Sharing water is an efficient way to increase justice and resilience. This is equally true for relationships between countries who share a river, lake, or groundwater aquifer. By managing it together, they are much better prepared for the increasingly erratic rainfall patterns and the growing number of droughts and floods that must be expected as the global temperature rises.
One of the largest and oldest organisms on earth is located in fish lake and nation, forest, in utah.pando is an 80,000 year old grove of aspen trees that cover 100 acres. Although it looks like a forest, DNA analysis of several of the trees has confirmed it is really just one huge organism. Therefore the trees must have been reproduced
Answers
Pando aspen grove in Utah is an immense, genetically identical organism consisting of interconnected aspen trees spanning 100 acres and estimated to be around 80,000 years old.
One of the largest and oldest organisms on Earth, known as Pando, is located in Fish Lake National Forest in Utah. Pando aspen grove is an 80,000-year-old grove of aspen trees that covers approximately 100 acres. While it appears to be a forest, DNA analysis of several of the trees has revealed that they are genetically identical, confirming that Pando is actually one immense organism. The trees of Pando have been reproduced through a process called vegetative reproduction, where new shoots and stems emerge from the existing root system. This unique reproductive strategy has allowed Pando to persist and expand over thousands of years, making it a remarkable example of the interconnectedness and longevity of living organisms.For more questions on Pando aspen grove:
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what is selection pressure in the process of soapberry bugs population living on the introduced/new food source, came to have, on average, shorter beaks.
Answers
In soapberry bugs living on a new food source, the availability of the new food source would be the selection pressure that affects the characteristics of the population over time. Option A is correct.
In this case, the new food source may require soapberry bugs to develop shorter beaks in order to feed on it more efficiently. Those soapberry bugs with shorter beaks that are better adapted to feed on the new food source would have a selective advantage over those with longer beaks that are less efficient in feeding.
As a result, the soapberry bugs with shorter beaks are more likely to survive and reproduce, passing their genes and traits onto their offspring. Over time, this process of natural selection can lead to the average beak length of the population becoming shorter, as the soapberry bugs with longer beaks are selected against.
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--The given question is incomplete, the complete question is
"What is selection pressure in the process of soapberry bugs population living on the introduced A) new food source B) came to have C) on average D) shorter beaks."--
In a group of Syrian hamsters, some individuals have straight fur and others have wavy fur. In this group, the gene for the fur texture trait has two alleles. The allele for wavy fur (f) is recessive to the allele for straight fur (F).
Complete the Punnett square below to show all possible genotypes of the offspring from a cross between two Syrian hamsters.
Answers
Answer:
Therefore the genotype would be;FF 25% Homozygous straight furff 25% Homozygous wavy furFt 50% Heterozygous mixExplanation:
Genotype describes the combination of alleles that an individual has for a certain gene
-----hope it helps =)
as precipitation falls back into the earth which of the following occurs
a transpiration
b absorption
c flooding
evaporation
Answers
Answer:D) evaporation
Explanation:
The accurate answer is transpirtation :)
A given skull has flaring zygomatics, shovel-shaped incisors, round orbits, and moderate nasal aperture width. The ancestry of this individual is likely ________________
Answers
Answer:
Asian or Native American
Which strategy best describes a way to address polluted air? Select three options.
Answers
Answer:
replace the type of chemicals used in industrial processes
minimize the burning of fossil fuels used at industrial plants
study the effects of mold exposure on people who suffer from asthma
Explanation:
In the geologic past, volcanic eruptions have had an impact on the availability of resources. How can volcanic eruptions impact the availability of resources?.
Answers
Volcanic eruptions can impact the availability of resources by preventing sunlight from reaching producers.
Volcanic ash is responsible for blocking sunlight in the air. Volcanoes erupt with a powerfully destructive mixture of ash, lava, hot, toxic gases, and rock. Explosions from volcanoes have claimed lives. Volcanic eruptions can lead to significant health risks and impact the availability of resources.
Volcanoes produce a variety of land resources. In the west-central Pacific Ocean, on a small volcanic island called Micronesia. In addition to providing a place for people to reside, these volcanic islands have evolved into communication and shipping hubs.
Minerals, volcanic glass, and microscopic pieces of ragged rock make up volcanic ash. Explosive volcanic explosions produce ash. Volcanic ash plumes can cover a sizable portion of the sky, completely blocking out the sun and decreasing visibility. Thunder and lightning are frequently present along with these huge and ominous clouds.
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List 3 things you have learned from the state officer visit.
Answers
Well state officers teach you many skills, like self defense , firearms training, and first aid skills and knowledge hope i helped.
Whenever the marginal product decreases, the marginal cost of production is also increasing
Answers
Yes, the statement is generally true. The concept of marginal product and marginal cost is derived from the law of diminishing returns in economics.
The marginal product refers to the additional output produced when one more unit of input (such as labor or capital) is added to the production process while keeping other inputs constant. Initially, as more input is added, the marginal product tends to increase, indicating higher efficiency and productivity.
However, as the law of diminishing returns sets in, the marginal product eventually starts to decline. This means that each additional unit of input contributes less and less to the total output. When the marginal product decreases, it indicates diminishing returns to scale.
On the other hand, marginal cost represents the additional cost incurred by producing one more unit of output. As the marginal product decreases, it implies that producing additional units becomes less efficient and more costly. Therefore, the marginal cost of production tends to increase as the marginal product decreases.
The relationship between marginal product and marginal cost is closely linked to the concept of efficiency and resource allocation in production. Understanding this relationship helps businesses make informed decisions about optimal production levels and cost management.
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students have been studying cellular respiration in their biology class and are working on a computer simulation that allows them to test the effects of several variables on the products of respiration. in one simulation, they are asked to change the initial concentrations of several gases, one at a time, to see the impact on atp production in a muscle cell. if the students begin by removing oxygen from the muscle cell, what should they predict will occur? responses the cell will produce more atp because oxygen inhibits atp production in the mitochondria. the cell will produce more atp because oxygen inhibits atp production in the mitochondria. the cell will produce no atp at all since oxygen is critical to atp production. the cell will produce no atp at all since oxygen is critical to atp production. the cell will produce the same amount of atp since oxygen is not a factor in atp production. the cell will produce the same amount of atp since oxygen is not a factor in atp production. the cell will produce some atp but in much lower amounts than if oxygen was present.
Answers
the cross of a green budgie and a blue budgie produces offspring that are 12 green, 13 blue, 4 yellow, and 3 albino. what are the genotypes of the parents?
Answers
The genotype of the parents of the cross of a green budgie and a blue budgie which produces offspring that are 12 green, 13 blue, 4 yellow, and 3 albinoes are: Gg and BB.
Both parents are heterozygous (hybrid) for the gene responsible for feather coloration. It means that they have two different alleles for the gene that controls feather color. Each budgie has two alleles, one from each parent. In this scenario, the blue budgie parent has two alleles for blue feather coloration (BB), and the green budgie parent has two alleles for green feather coloration (gg).
The offspring from this cross have four different feather colors: green, blue, yellow, and albino. The ratios of the offspring are 12 green: 13 blue: 4 yellow: 3 albino. We can use these ratios to determine the possible genotypes of the offspring. The green offspring must have the genotype gg.
The blue offspring can either have the genotype BB (homozygous) or Bb (heterozygous). The yellow offspring must be heterozygous (Bb) because it is a mixture of blue and green. The albino offspring are homozygous recessive (bb) for feather coloration.
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True root and xylem and phloem are present and 1 first true plant
Answers
Answer:
Pteridophytes are the first true land plants with xylem and phloem. Hence, they are called vascular cryptogams.
Explanation:
I think you are talking about this.
write any four difference between homologous and vestigial organs.
Answers
Homologous structures are anatomical structures that are comparable to one another and have been passed down from a common ancestor, whereas vestigial structures are anatomical structures that have shrunk in size because they are no longer needed.
What are homologous and similar structures different in four ways?Homologous structures are those with different roles but comparable anatomy, morphology, embryology, and genetics. Analogous structures are those that perform the same function while having anatomically distinct surfaces.The classic example of homologous structures are the bones of limbs in vertebrate animals. A structure that has atrophied and is no longer helpful is said to be vestigial.The bones of an animal's limbs are a prime example of homologous structures. A structure that has atrophied and is no longer useful is said to be vestige.Here are a few instances of homology: Homologous structures include the human arm, a bird or bat's wing, a dog's leg, a dolphin or whale's flipper, and the wing of a bird or a bat. They are distinct and serve different purposes, although they are comparable and have similar characteristics.To Learn more About Anatomical structures, Refer:
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Of the following plants, which stem has scattered vascular bundles? A. corn B. magnolia C. chrysanthemum D. hibiscus
Answers
Of the following plants, a. corn stem has scattered vascular bundles.
How do vascular bundles work?The transport system in vascular plants includes vascular bundles. The actual transport takes place in the stem, which comes in the xylem and phloem forms. A vascular bundle, which also contains supporting and protecting tissues, contains both of these tissues. The Cambium, a tissue, is also present between the xylem and the phloem.
Phloem is often found farther from the axis than the xylem, which is typically adaxial (abaxial). This indicates that in a stem or root, the xylem is closer to the interior while the phloem is closer to the exterior. The upper side of a leaf is typically the adaxial surface, and the bottom side is the abaxial surface.
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Which of the following structures controls the opening of the stomach into the small intestine?
a. Fundus
b. Cardiac sphincter
c. Pyloric sphincter
d. Body
Answers
Answer:
c. Pyloric sphincter
Which statement describes an example of the control of gene expression?
A Three types of RNA are made in the nucleus during the process of transcription.
B New polypeptides are made using amino acids brought to ribosomes by tRNA
molecules.
C Certain coding segments of mRNA are assembled after non-coding segments are
removed.
D RNA polymerase matches RNA nucleotide bases to the DNA bases of the coding
strand.
Answers
Answer:
D
Explanation:
What is the reason for the inactivity during adulthood for the eye that underwent the monocular deprivation during development?
Answers
The reason for the inactivity during adulthood in the eye that underwent monocular deprivation during development is due to the neural changes that occur in the visual system as a result of this deprivation.
Monocular deprivation involves depriving one eye of visual input, often by covering it, during a critical period of development. This critical period is when the brain is highly plastic and sensitive to the input it receives, allowing for the proper formation of neuronal connections and pathways.
The non-deprived eye's connections are strengthened due to the increased visual input. This process, called synaptic plasticity, leads to a competitive imbalance between the eyes, resulting in a phenomenon known as ocular dominance.
As a consequence, the eye that underwent monocular deprivation suffers from reduced visual acuity and responsiveness in adulthood. The neural pathways associated with the deprived eye are unable to fully recover, even if normal visual input is restored later in life, due to the decreased neural plasticity in adulthood.
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A couple, both carriers of cystic fibrosis (CF) alleles, can decrease their odds of having a child with CF by performing an in vitro fertilization procedure and screening the embryo for the CF alleles. This process is called
Answers
The procedure can decrease the odds of having a child with CF by performing an in vitro fertilization procedure and screening the embryo for the CF alleles is referred to as preimplantation genetic diagnosis.
What diseases can be detected by preimplantation genetic diagnosis?Pre-implantation genetic diagnosis (PGD) is the testing of embryos or oocytes at the pre-implantation stage for genetic defects.
It can be used to diagnose cystic fibrosis, Tay-Sachs disease, Hemophilia, etc.
Thus, the procedure can decrease the odds of having a child with CF by performing an in vitro fertilization procedure and screening the embryo for the CF alleles is referred to as preimplantation genetic diagnosis.
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What are three ways used to describe populations?
Answers
A population is a distinct group of individuals with shared citizenship, identity, or characteristics.
What is Population?In statistics, a population is a representative sample of a larger group of people (or even things) with one or more characteristics in common. The members of a sample population must be randomly selected for the results of the study to accurately reflect the whole.
The U.S. Census is perhaps the most ambitious survey in existence, given that it entails a door-to-door canvas of the entire population rather than a sample group study.
Population surveys large and small inform many if not most decisions by government and business.
Therefore, A population is a distinct group of individuals with shared citizenship, identity, or characteristics.
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A city wants to reduce groundwater overuse. Which of the following suggestions should the city council make to the community? SOMEONE HELP ME WITH THIS
1. Look into drilling personal wells on their own property.
2. Reduce the frequency of lawn watering during rainy seasons.
3. Increase the number of public trash cans to avoid littering.
4. Create educational fliers about how to properly dispose of toxic cleaning products.
Answers
Answer:
2. Reduce the frequency of lawn watering during rainy seasons.
Explanation:
I took the test
All of the offspring were ______________ because _________ is the dominant allele.
Answers
All of the offspring were expressing the dominant trait because the dominant allele is the dominant allele.
In genetics, the terms "dominant" and "recessive" are used to describe how different alleles of a gene interact and determine the phenotype of an organism. When a trait is determined by a dominant allele, it means that if an individual carries at least one copy of that allele, the trait associated with that allele will be expressed in the phenotype. In this case, all the offspring were expressing the dominant trait, indicating that they inherited at least one copy of the dominant allele responsible for that trait.
It's important to note that the presence of a dominant allele does not necessarily imply that it is more common or advantageous. Dominance is a genetic concept related to the expression of traits and how different alleles interact, rather than a measure of frequency or evolutionary superiority.
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A bar graph and a pie graph are the same thing.
A. True
or
B. False
Answers
Pie charts show how much each category represents as a proportion of the whole and Bar graphs use a series of rectangular bars to show absolute values or proportions for each of the categories
what are two main food sources for lipids?
Answers
Answer:
1) Animals Sources: Dairy Products- Meat, butter, ghee meat, fish, pork, and eggs, 2) Vegetable Sources: Cooking oil, sun flower oil, mustard oil, ground nut oil, fats from other vegetable sources.
Explanation:
3. List one advantage and disadvantage of a monocot root system.
Answers
A disadvantage is that this type of root is not favourable to the water scarce area or drought. So such plants live in the areas where water is easily available.
Complementary proteins are 2 or more proteins that are combined so that the essential amino acids that are missing from one are provided by the other.
a. true
b. false
Answers
Yes, it's true that complementary proteins are specialized kinds of proteins that are made up of two or more proteins combined so that the essential amino acids that are missing from one are provided by the other.
A total of nine amino acids are essential for our body. So, combining two or more proteins instead of one ensures that we obtain all nine amino acids in our diet.
One kind of protein is not enough for our body. Therefore, complementary proteins are added to our diet to meet all our needs. For example, combinations of Beans and rice in our diet will meet nine essential amino acids.
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5) What is the largest hierarchical level that global warming affects?
a) organism b) community c) biosphere d) population
Answers
Answer:
C) Biosphere
Explanation:
Chapter 18 Homework
I've done this before...
The largest hierarchical level that global warming affects is the biosphere, which is in Option C, as the biosphere includes all the living organisms and their interactions with each other and with their physical environment.
What is global warming?Global warming refers to the long-term increase in Earth's average surface temperature, primarily due to the release of greenhouse gases from human activities such as burning fossil fuels and deforestation. This increase in temperature has a range of impacts on the biosphere, including altering ecological processes, changing the distribution of species, and affecting the physical environment, and it can also have a profound impact on the distribution and abundance of species.
Hence, the largest hierarchical level that global warming affects is the biosphere, which is in Option C.
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