The substance used in soil-free mixes that has a high silica count, offers good drainage, little water retention, little if any nutritional value, and is comparatively heavy is sand.
The correct option is C.
What is the silica content of sand?Sand has a high silica content, which provides good drainage in soil-free mixes. It has little water-retention capacity, meaning it allows water to pass through quickly.
Sand generally has minimal nutritional value for plants. It is also relatively heavy compared to the other substances listed.
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In which biome do animals have a thick layer of fat to keep them warm?
Answer:
tundra
Explanation:
Name two different types of organic compounds or molecules in the fruit juice
Two different types of organic compounds or molecules commonly found in fruit juice are carbohydrates and organic acids.
Fruit juice typically contains various types of carbohydrates, including simple sugars such as fructose and glucose. These carbohydrates provide sweetness and energy.
Fruit juice contains organic acids that contribute to its flavor and acidity. Examples of organic acids commonly found in fruit juice include citric acid (found in citrus fruits), malic acid (found in apples), and tartaric acid (found in grapes). These organic acids give fruit juice its characteristic tangy taste.
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Which of the following best validates why growers make use of greenhouses?
Responses
they reduce infection risk
they provide superior control of the growth environment
they reduce production costs
they provide crop production at a lower labor investment
Answer:
B They provide superior control of growth
CHAPTER 4
LESSON
2
READING TOOL Main Idea and Details As you read your textbook, identify the
main ideas and details or evidence that support the main ideas. Use the lesson
headings to organize the main ideas and details. Record your work in the table.
Two examples are entered for you.
Food Chains
Heading
Food Chains and Food Webs
Energy Flow in Ecosystems
Food Webs
• Food Chains Within Food Webs
• Decomposers and
Detritivores in Food Webs
Food Webs and Disturbance
Ecological Pyramids
Pyramids of Energy
Pyramids of Biomass Numbers
4 Chapter 4 Ecosystems
Main Idea
A food chain shows how
energy transfers through
feeding relationships.
Details/Evidence
On average, about 10% of the
energy is transferred from one
trophic level to the next.
Copyright © by Savvas Learning Company LLC. All Rights Reserved.
The main ideas and details for the lesson on food chains and food webs is attached below in a table.
What is Food Chains and Food Webs?A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another. A food web is a more complex system of interconnected food chains.
In a food chain, each organism occupies a different trophic level. The first trophic level is made up of producers, which are organisms that can make their own food. The second trophic level is made up of primary consumers, which eat producers. The third trophic level is made up of secondary consumers, which eat primary consumers. The fourth trophic level is made up of tertiary consumers, which eat secondary consumers. And so on.
Food webs show how energy flows through an ecosystem more accurately than food chains. This is because food webs take into account the fact that organisms can eat more than one type of food. For example, a fox might eat rabbits, mice, and birds. This means that the fox is connected to three different food chains.
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Complete the following sentence.
Citrus______ is a bacteria that is highly infection to all citrus crops.
Answer:
Canker.
Explanation:
Citrus canker is a bacteria that is highly infectious to all citrus crops.
Hope this helps!
Which of the following styles makes use of follies as a design element of the garden?
Japanese garden
French formal garden
English landscape garden
English cottage garden
The English landscape garden is the style that uses follies as a design element of the garden. Option 3.
Follies and English landscape gardenFollies are architectural structures that serve primarily decorative purposes and are often whimsical or fantastical in nature.
They can take the form of ruins, temples, grottos, or other ornamental structures.
In English landscape gardens, follies are strategically placed within the landscape to create visual interest, focal points, or to evoke a sense of romanticism or nostalgia.
These gardens aim to mimic the natural landscape and often incorporate elements such as rolling hills, meandering paths, lakes, and woodlands. Follies are a key feature in this style, adding a touch of whimsy and intrigue to the overall design.
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The English landscape garden makes use of follies as a design element of the garden.
What are follies?Follies, whimsical architectural embellishments, serve as captivating elements employed to infuse charm and diversity into a garden. Ranging from petite gazebos to imposing ruins, they bestow a touch of enchantment.
The English landscape garden, an artistic movement that blossomed during the 18th century, arose as a response to the rigid structure of the French formal garden. English landscape gardens, characterized by their inclination towards a more organic and relaxed aesthetic, frequently incorporate follies as captivating focal points, enriching the overall allure and diversity of the setting.
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Select the soil-free ingredients that are fully non-organic in origin.
perlite
vermiculite
diatomite
sand
mineral wool
bark
peat
expanded clay
Answer:
perlite, vermiculite, diatomite, sand, mineral wool, and expanded clay are soil-free and fully non-organic in origin. Bark and peat are organic materials and are not fully non-organic.
Nature overcomes some natural disasters such as when a flooded mangrove forest or a Burnt forest are reborn study the photos on the right and give examples of how an old ecosystem might be destroyed and make way for a different ecosystem
write the phenotype and genotype
Explanation:
The concepts of phenotype and genotype are related to genetics.
The phenotype is generally called the external appearance of the living thing, which is formed by the genetic information and environmental effects.
Genotype is the genetic information that an organism carries in its DNA.
For example; Character A is the favorite black color. a is the blue color character.
While the Aa display shows the individual with black eyes in the phenotype, the genotype is expressed as heterozygous dominant black eyes.
do the usage of synthetic plant hormones for the modification of plant growth have any environmental implications
The usage of synthetic plant hormones for the modification of plant growth can have environmental implications.
Understanding the Effect of Synthetic Plant HormonesFactors to consider
1. Ecotoxicity: Synthetic plant hormones, if not properly regulated or used in excessive amounts, can pose risks to non-target organisms and ecosystems. They may affect the growth and development of other plants, beneficial insects, and microorganisms, potentially disrupting ecological balance.
2. Soil and Water Contamination: Improper application or disposal of synthetic plant hormones can lead to soil and water contamination. Runoff from treated fields or improper disposal of unused hormones may introduce these compounds into water bodies, potentially affecting aquatic organisms and overall water quality.
3. Resistance and Persistence: Repeated and excessive use of synthetic plant hormones can contribute to the development of resistance in target plant species. This can lead to the evolution of herbicide-resistant weed populations, requiring higher doses or different chemicals to achieve the desired effect. Moreover, some synthetic hormones may persist in the environment for extended periods, potentially impacting subsequent crops or natural vegetation.
4. Non-target Effects: Synthetic plant hormones may influence the growth and development of unintended plant species, leading to unintended consequences such as changes in biodiversity, alteration of natural plant communities, or interference with the natural ecological succession.
5. Human Health Concerns: The potential impacts of synthetic plant hormones on human health are an area of ongoing research. While these hormones are generally considered safe for use in agriculture when used according to regulations, there may be concerns related to exposure, residues, or indirect effects on food quality and safety.
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Which of the following systems draws heat from the ceiling to specific areas in a green house?
forced air heat
convection tubes
radiant heat
fan ventilation
Convection tubes systems draws heat from the ceiling to specific areas in a green house.
What is a green house?A greenhouse is a structure that grants individuals the ability to control climatic factors, including temperature and humidity. Various architectural styles of greenhouses exist, but typically, these structures incorporate expansive surfaces composed of translucent materials to harness the radiance and warmth of the sun.
Among the prevalent transparent materials employed in the roofs and walls of contemporary greenhouses, one finds sturdy plastics crafted from polycarbonate, pliable films manufactured from polyethylene, or even glass panels. When sunlight permeates the interior of a greenhouse, the internal temperature ascends, providing a protective haven for plants against inclement cold.
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If the half life of an element was 430 years and you had 2000 atoms of this element, how long would it take to undergo complete radioactive decay? What year would it be when the element finished decaying?
part a.
it would take an estimated 2984 years for the element to undergo complete radioactive decay.
How do we calculate?N = N₀ * (1/2)[tex]^(^t ^/^ T^)[/tex]
N = final number of atoms remaining
N₀ = initial number of atoms
T = half-life of the element
0 = 2000 * (1/2)^(t / 430)
(1/2)^(t / 430) = 0
log₂((1/2)= log₂(0)
(t / 430) * log₂(1/2) = log₂(0)
0.01 = (1/2)^(t / 430)
log₂(0.01) = (t / 430) * log₂(1/2)
t = log₂(0.01) * 430 / log₂(1/2)
t = 2984 years
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I need the answers this makes no sense ngl
Answer:
For A - answer is organism 2
For B- answer is glucose(C6H12O6) and oxygen(O2)
For C- Chloroplast
Why did biologists introduce the Texas puma into Florida?
Biologists introduced the Texas puma into Florida to address the declining population of native panthers.
Introduction of the Texas PumaThe Texas puma, also known as the Florida panther's closest relative, was introduced to increase genetic diversity and strengthen the population's resilience.
By introducing new individuals into the Florida panther population, biologists aimed to reduce the risks associated with inbreeding and enhance the long-term survival prospects of the species.
This effort sought to restore balance to the ecosystem and ensure the preservation of this iconic and endangered big cat species.
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if scientists found a fossil in the middle layer that was 2 million years old, would they think Earth was more or less than 2 million years
If scientists found a fossil in the middle layer that was 2 million years old, they would conclude that Earth is more than 2 million years old based on the presence of older rock layers and fossils in lower layers.
Fossils provide valuable evidence for dating the age of the Earth and its geological history.
The principle of superposition, a fundamental concept in geology, states that in undisturbed rock layers, the oldest rocks are found at the bottom, while the youngest rocks are found at the top.
By finding a 2 million-year-old fossil in the middle layer, scientists can infer that the lower layers, which were formed before the middle layer, are older than 2 million years. Additionally, the presence of upper layers, formed after the middle layer, would suggest that Earth's age exceeds 2 million years.
Scientists use various dating methods, including radiometric dating, to determine the age of rocks and fossils.
These techniques analyze the isotopic decay of certain elements present in the rocks or fossils to estimate their age.
Through these methods, scientists can establish a more accurate timeline of Earth's history, revealing an age far greater than the age of the specific fossil found in the middle layer.
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Explain why greenhouse systems are preferred for leafy greens, seedlings, and flowers but are less often used for other crops.??
Greenhouse vegetables include tomatoes, capsicum, cucumbers, eggplants, etc. Pest control is best done with healthy seedlings and proper maintenance in greenhouses.
A greenhouse is a building made of a transparent material that allows natural light to enter. The main elements of a greenhouse, such as the structure, cover/glazing, and temperature control system, need to be designed correctly for the growth of plants.
The greenhouse effect is the name given to a number of crops that thrive in a greenhouse environment. These include salad greens, peppers, cucumbers, spinach, and tomatoes.
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In lungs there is definite exchange of ions between
RBC and plasma. Removal of CO₂ from blood involves
Yes, there is undoubtedly an ion exchange between plasma and red blood cells (RBCs) in the lungs. The elimination of carbon dioxide (CO2) from the blood depends on this exchange. The blood is transported to the lungs, where it is exposed to oxygen, when it becomes oxygen-depleted.
RBCs release protons and bicarbonate ions into the plasma when this oxygen attaches to the haemoglobin in the RBCs. As a result, the pH of the plasma rises, causing the plasma to release CO2 into the lungs' alveoli.
The CO2 is then expelled after diffusing out of the lungs. The pH of the RBCs also drops as a result of the release of protons and bicarbonate ions by the RBCs.As a result, the RBCs absorb oxygen from the lung's alveoli and discharge bicarbonate ions into the plasma. By doing so, the pH of the plasma is kept constant and the blood's CO2 levels are reduced.
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Which phase are most cells currently in ?
cells are most currently in :
interphase
Which of the following is the largest sector in the field of floriculture?
potted plants
cut plants
annual bedding plants
foliage plants
Answer:
The largest sector in the field of floriculture is potted plants.
6) The diagram below shows Kepler-47c in eight different positions in its orbit around Stars A and B. Around each of Kepler-47c’s positions is a dashed circle representing its moon’s orbit. (Criteria B(i))
• For each of Kepler-47c’s positions (1–8), try to draw its moon in a position on the dashed circle where a lunar eclipse could happen.
• Then, the boxes (below the diagram) for each position in which a lunar eclipse could happen.
Here are the eight different positions of Kepler-47c in its orbit around Stars A and B attached and shown at positions 2, 4, 6, and 8.
How to determine lunar eclipses?For each of Kepler-47c’s positions (1–8), its moon in the position on the dashed circle where a lunar eclipse could happen are positions 2, 4, 6, and 8.
A lunar eclipse can happen when the moon passes directly behind the Earth and is completely obscured from view. This can only happen when the moon is full, and when the Earth is between the moon and the sun. In the diagram, positions 2, 4, 6, and 8 all meet these criteria. In these positions, the moon is in the Earth’s shadow, and a lunar eclipse could happen.
In positions 1, 3, 5, and 7, the moon is not in the Earth’s shadow, and a lunar eclipse cannot happen. In these positions, the moon is either on the opposite side of the Earth from the sun, or it is in front of the sun.
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5. Differentiate between:
a. Scientific study and general study
2 page essay on what are the pros and cons of genectically modifying an organism and is it ethical to geneically modify an organism
Genetically modifying organisms (GMOs) has both pros and cons.
Pros: GMOs can be engineered to be more resistant to pests, diseases, and environmental conditions, leading to higher crop productivity and food security. They can be used to increase the nutrient content of crops, improving their nutritional value and addressing specific dietary deficiencies.
Cons: GMOs may have unintended ecological impacts, such as cross-pollination with wild relatives or the emergence of superweeds or pests resistant to the modified traits. Some individuals have concerns about the long-term health effects of consuming GMOs.
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recal what you know about the functions of the skeletal system to complete the following questions
The skeleton provides a framework for ⇒ muscle and soft tissue attachment.
Name one organ protected by the ribcage. ⇒ Heart, lungs, liver
Blood is formed in the:
red bone marrow.Calcium is released and deposited in the bones and blood to maintain homeostasis. calcium, phosphorus, minerals, fat is stored in the bones.When muscles: ⇒ contract, the bones attached to them move.
What is the skeletal systemThe bony structure of the skeleton serves as a foundation for providing support and attaching soft tissues. The heart is safeguarded by the ribcage.
The bone marrow is responsible for producing blood. In order to keep the body in balance, calcium is discharged and stored in both the bloodstream and bones. The bones serve as a storage site for calcium. The movement and locomotion of the body occurs as a result of bones connected to contracting muscles.
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See full text below
Recall what you know about the functions of the skeletal system to complete the following questions. The skeleton provides a framework for and soft tissue attachment. Name one organ protected by the ribcage. Blood is formed in the bone marrow. is released and deposited in the bones and blood to maintain homeostasis. is stored in the bones. When muscles , the bones attached to them move.
Which of the following best describes the economic threshold in pest management?
the point at which treatment of the pest costs more than the pest damage
the point at which pest damage costs more than the potential value of the harvest
the point at which pest-management techniques increase profit
the point at which pest-management techniques are first employed
The point at which treatment of the pest costs more than the pest damage. Option A
What is the pest damage?In pest management, the term "economic threshold" refers to the pest population level at which the expense of implementing pest control measures outweighs any potential economic losses brought on by the pest. It is the point at which using pest management methods or treatments is financially viable.
Below this point, treatment might not be required because it would be more expensive to control the pest than any potential harm it might cause.
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Refraction occurs when the amplitude of a wave changes as it goes from one medium to another. yes or no?
Yes, it is true that when Refraction occurs the amplitude of the wave changes as it travels from one medium to the other.
Refraction is generally termed as bending of light ray when light travels from one medium to the other medium. Bending highly depends on whether the Medium may be dense or light.
Refraction may also be defined as the redirection or change of the direction of the wave that is passing from one medium to the other. It can be most commonly observed, for example, refraction in glasses, lenses etc.
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Part D Consider the results of each solution. Did any one solution work best? Could you combine or modify the solutions to develop a better method for removing the oil from the water?
question is the screenshot
The possibility that it would be red eyed would be 75%. Option D
What is the Punnet square?A Punnett square is a genetics tool used to forecast the potential allele combinations in the progeny of a cross between two individuals. It bears the name Reginald Punnett after the British geneticist who created it.
Each box in the Punnett square represents a potential combination of alleles from the parents, and it typically consists of a square grid with boxes. The top of the grid lists the alleles of one parent, and the left side lists the alleles of the other parent.
By the use of the Punnet square that we have shown in the image attached, we can see that the possibility of the white eyes would be 75%.
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Describe the role of GA in a-amylase production and in germination. Provide evidence for your claim
Gibberellic acid (GA) plays a crucial role in a-amylase production and germination. GA stimulates the synthesis and release of a-amylase enzymes, which hydrolyze starch into sugars during germination. Experimental studies have demonstrated that the application of GA accelerates a-amylase production and enhances germination in various plant species
In terms of a-amylase production, GA stimulates the synthesis and release of this enzyme. a-amylase is responsible for breaking down starch into simpler sugars, which are then utilized by the plant for growth and development.
Studies have shown that applying GA to plant tissues or seeds results in an increased production of a-amylase, facilitating the conversion of stored starch into energy-rich sugars.
Regarding germination, GA is involved in breaking seed dormancy and promoting the growth of the embryonic plant.
It stimulates the production of hydrolytic enzymes like a-amylase, which enable the hydrolysis of starch reserves in the endosperm, providing the energy needed for germination and seedling establishment.
Additionally, GA helps in cell elongation and division, promoting the growth of the embryo and the emergence of the radicle.
Evidence for GA's role in both processes includes studies where the exogenous application of GA to seeds or plant tissues has been shown to enhance a-amylase production and promote germination.
Conversely, inhibiting GA synthesis or action results in reduced a-amylase activity and impaired germination. These findings support the critical involvement of GA in both a-amylase production and germination processes in plants.
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why practical sciences is often left out by teachers ?
Practical sciences are sometimes left out by teachers due to limited time and resources in educational institutions and may prioritize theoretical knowledge over practical application.
Additionally, practical sciences often require specialized equipment, facilities, or materials, which may not be readily available in schools. Moreover, teachers may feel more comfortable with traditional teaching methods and may lack the training or expertise to effectively integrate practical sciences into their curriculum.
Standardized tests and assessment frameworks that focus on theoretical concepts further discourage the inclusion of practical sciences. However, recognizing the importance of hands-on learning experiences, efforts should be made to bridge this gap and promote the integration of practical sciences into educational settings.
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Reason why the crow blood is black
The reason why the crow is black can be traced to the presence of melanin pigments poduced by cells known as melanocytes.
Why is the crow's back black in color?The reason that explains why the corw's back is black is the presence of melanin pigments produed by the cells in their skin, hair, and feather. In humans, these pigments are also responsible for the balck color of individuals.
The amount of melanin produced by the body can determine how dark a peron or animal appears. So, melanin os the causative factor for blackness.
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