Maggie places cells of Elodea, a freshwater plant, on a wet-mount microscope slide. She uses a saltwater solution to prepare the slide. When she observes the cells under the microscope, what is she most likely to see?
A.
The cell walls have dissolved, releasing the cell.
B.
The cells have remained unchanged.
C.
The cells will swollen, expanding the cell walls.
D.
The cells have shrunk within the cell walls.
When Maggie places the cells under the microscope, she is most likely to see D. The cells have shrunk within the cell walls.
Why would the cells have shrunken ?If Maggie places cells of Elodea, a freshwater plant, on a wet-mount microscope slide, and then uses a saltwater solution to prepare the slide, she is most likely to see the cells have shrunk within the cell walls when she observes them under the microscope.
When cells are placed in a hypertonic solution (such as saltwater), water moves out of the cells by osmosis, resulting in the cells losing water and shrinking. In the case of Elodea cells, the cells will shrink within the cell walls.
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which set of terms best describes a cell membrane
The cell membrane can be described using the following terms:
1-Phospholipid bilayer: The cell membrane is composed of a double layer of phospholipid molecules arranged with their hydrophilic (water-loving) heads facing outward and their hydrophobic (water-repelling) tails facing inward.
2-Selectively permeable: The cell membrane is selectively permeable, meaning it allows the passage of certain substances while restricting the movement of others. This property helps maintain the cell's internal environment and regulate the exchange of molecules with the external environment.
3-Fluid mosaic model: The cell membrane is described by the fluid mosaic model, which suggests that it is a dynamic structure composed of various components, including phospholipids, proteins, carbohydrates, and cholesterol. These components are not fixed in place but rather move and interact within the membrane.
4-Barrier: The cell membrane acts as a barrier, separating the cell's internal environment from the external environment. It helps protect the cell's contents and regulates the movement of molecules, ions, and other substances in and out of the cell.
5-Receptor sites: The cell membrane contains receptor sites that can recognize and bind to specific molecules or signals, such as hormones or neurotransmitters. This allows the cell to respond to external stimuli and initiate various cellular processes.
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Explain how an appliance could have a lower wattage than another but still cost more per year for electricity. give examples
Answer:
An appliance could have a lower wattage than another but still cost more per year for electricity if it’s not well insulated and cycling on more often to keep the interior cold. For instance, a cheap mini fridge may have low wattage, but if it’s not well insulated and cycling on more often to keep the interior cold, your final costs to run it will be higher than a better-designed beverage cooler with excellent insulating properties.
Explanation:
Two fruit fly parents have 8 chromosomes each. They sexually reproduce and make offspring. Which statement best explains how their offspring inherits their genes?
A
The offspring receives 4 chromosomes from the sperm and 4 chromosomes from the egg.
B
The offspring receives 8 chromosomes from the sperm 8 from the egg.
C
The offspring receives all 8 chromosomes from a single parent.
D
The offspring receives 4 chromosomes from one parent, and they double to 8 chromosomes during growth.
Answer: Two fruit fly parents have 8 chromosomes each. They sexually reproduce and make offspring. Which statement best explains how their offspring inherits their genes?
Explanation:The offspring of the fruit fly parents inherit their genes through a process called meiosis, which involves the formation of gametes (sex cells) with half the number of chromosomes as the parent cells. During meiosis, the chromosomes in the parent cells undergo genetic recombination and segregation, resulting in gametes with unique combinations of genes from both parents.When the two gametes (sperm and egg) from the fruit fly parents fuse during fertilization, the resulting zygote inherits a combination of chromosomes from both parents, which determines the genetic makeup of the offspring. Each chromosome contains multiple genes, which are segments of DNA that carry the instructions for specific traits or characteristics. The combination of genes inherited from both parents determines the traits, characteristics, and genetic traits of the offspring.In the case of fruit flies with 8 chromosomes, the offspring would also have 8 chromosomes, with a unique combination of genes inherited from both parents. This genetic diversity through sexual reproduction allows for genetic variation within populations, which can contribute to evolution and adaptation to changing environments. However, it's important to note that specific patterns of inheritance, such as dominant and recessive traits, can also come into play, depending on the genes involved. The inheritance of genes and traits in offspring is a complex process influenced by multiple factors, including genetic recombination, segregation, and inheritance patterns. So, the statement that best explains how the offspring inherit their genes from fruit fly parents is through meiosis, genetic recombination, and segregation during sexual reproduction.
Where in the female reproductive system does the egg meet the sperm and become fertilized?
The egg meets the sperm and becomes fertilized in the fallopian tubes, which are located on either side of the uterus. After ovulation, the egg is released from the ovary and travels down the fallopian tube towards the uterus. If sperm are present in the fallopian tube, they may fertilize the egg, resulting in the formation of a zygote. The zygote will then continue to travel down the fallopian tube towards the uterus, where it may implant and develop into a fetus.
Answer:
The egg and sperm meet and fertilization typically occurs in the fallopian tubes of the female reproductive system. After an egg is released from the ovary during ovulation, it travels through the fallopian tube toward the uterus. If sperm are present in the fallopian tube, they may fertilize the egg as it travels towards the uterus. Once fertilized, the egg then continues its journey towards the uterus, where it may implant and develop into a pregnancy.
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Explain how has technology evolves, frantic expert testimony will evolve as well.
Democratic structures
Answer:
Democratic structures refer to the systems and institutions that are designed to support democracy and promote democratic principles, such as transparency, accountability, and citizen participation1. These structures can exist at various levels of government, from national to local, and provide citizens with different ways to participate in the democratic process.
In a representative democracy, citizens elect representatives to make decisions on their behalf. These representatives are held accountable to the citizens through regular elections and other mechanisms of democratic accountability. Examples of democratic structures in a representative democracy include legislative bodies, such as parliaments or congresses, and executive bodies, such as presidents or prime ministers.
There are many different types of democratic structures and systems, each with its own unique features and characteristics. The specific democratic structures that exist in a given country or community depend on its history, culture, and political traditions.
Explanation:
What are the four modern-day phyla of gymnosperms?
Answer:
Gymnosperms consist of four main phyla: the Coniferophyta, Cycadophyta, Gingkophyta and Gnetophyta.
Conifers are the dominant plant of the gymnosperms, having needle-like leaves and living in areas where the weather is cold and dry.
Cycads live in warm climates, have large, compound leaves, and are unusual in that they are pollinated by beetles rather than wind.
Gingko biloba is the only remaining species of the Gingkophyta and is usually resistant to pollution.
Gnetophytes are the gymnosperms believed to be most closely related to the angiosperms because of the presence of vessel elements within their stems.
What percent of Oregon’s forest has been lost in the last four centuries 
In Oregon, over the past four centuries, the amount of forest in the state has remained fairly constant, with about 1 percent having been lost to human development.
What is deforestation?Deforestation is the removal of trees and forests from a particular area, whether for commercial or personal use. Deforestation can occur for various reasons, including agriculture, logging, mining, urbanization, and natural disasters.
Deforestation has numerous negative environmental impacts, such as soil erosion, loss of biodiversity, increased greenhouse gas emissions, and climate change. It can also have adverse effects on human societies, including the displacement of indigenous people and the destruction of their cultural and economic systems.
Oregon has approximately 30.4 million acres of forest land, accounting for 47% of the state's total land area and has lost about 1% to deforestation.
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If you think of a cell as a factory that makes proteins and ships them out, which function would vesicles perform?
Answer:
Vesicles would be the package (box,sack,polybag,etc) within which to put your proteins
Please help :(
I’m not sure
Answer:
Porque los niños no van a las escuelas
de Puerto Rico.
I need your help with this
Answer:
True
Explanation:
The formula for gravitational force is:
F = Gm1m2/r^2
where F is the gravitational force, G is the universal gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between their centers. According to this formula, the gravitational force depends on the product of the masses of the two objects. This means that any object that has mass will exert a gravitational force on any other object that has mass. Therefore, the statement is true: everything that has mass exerts a gravitational force on other objects.
How are the functions of the smooth and rough ER differentiated?
Explanation:
The rough ER, studded with millions of membrane bound ribosomes, is involved with the production, folding, quality control and despatch of some proteins. Smooth ER is largely associated with lipid (fat) manufacture and metabolism and steroid production hormone production. It also has a detoxification function.
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2. Summarize the evidence you have gathered to support your claim and explain
Microscopic organisms be so important for life on Earth
Answer:
Explanation:
to live
Question 4 (1 point)
Population size in nature is ALWAYS constant. (Lesson 5.07)
True
False
Answer:
true
Explanation:
Determine the speed of the cyclist between 10 and 12 hours.
Based on the information provided in the graph, the speed between 10 and 12 hours was one kilometer per hour.
How to calculate the speed?To calculate speed using time and distance, you can use the following formula:
Speed = Distance / Time
Here's how to use this formula:
Determine the distance traveled. This can be measured in meters, kilometers, miles, or any other unit of distance.Determine the time taken to travel the distance. This can be measured in seconds, minutes, hours, or any other unit of time.Divide the distance by the time to get the speed. Make sure the units for distance and time match.Speed= 2 km / 2 hr = 1 km/hr
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Which of the following is a benefit of direct air capture technology?
O Moves carbon into the
atmosphere
O Provide carbon dioxide to crops in greenhouses
O Releasing carbon dioxide over the ozone layer
OUsing new fossil fuels for energy
The benefit of direct air capture technology is the ability to remove carbon dioxide from the atmosphere.
What does carbon dioxide do to the atmosphere?It causes a greater incidence of solar rays on the surface of the planet.It corrupts the ozone layer.Carbon dioxide is absorbed by plants during the photosynthesis process and this is important to keep the atmosphere free of this compound, but with the advancement of the use of fossil energies and intense deforestation, this compound accumulates in the atmosphere and causes various environmental problems, for this reason, using direct air capture technology can be beneficial to remove carbon dioxide from the atmosphere.
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7: If the actual length of a chloroplast is 10 um what is the magnification?
Can u solve 6 and 7
The magnification of the of a chloroplast is 500x.
How to calculate magnification?For question 7, use the formula for magnification:
Magnification = Image size / Actual size
Given the actual length of the chloroplast is 10 μm, rearrange the formula to solve for image size:
Image size = Magnification x Actual size
Image size = Magnification x 10 μm
Let's assume the image size is in micrometers as well.
If the magnification is 500x, then:
Image size = 500 x 10 μm = 5000 μm
Therefore, the magnification for a chloroplast with an actual length of 10 μm at an image size of 5000 μm is 500x.
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Image transcribed:
6) Look at the picture below and work out the actual size of a plant cell. The magnification used was x40.
7) If the actual length of a chloroplast is 10μm, what is the magnification?
Marine iguanas are large lizards that live in the Galápagos Islands. They feed on algae growing on rocks at the edge of the sea. When an El Niño event occurs, the sea around the islands becomes warmer, and the algae do not grow as rapidly as they do during typical temperatures. Scientists studied the relationship between the size of male iguanas on one of the Galápagos Islands and their survival during typical temperatures or during and El Niño event. The data are shown in the graph. Based on the data, identify which size make iguanas are most affected by an El Niño event and explain the most likely cause for this size of male iguana to be affected more than other sizes.
1. The larger male Iguana are most affected by the El Nino event since it is only those above 36 cm had a massive decline in population.
2. The most likely cause of why the larger males were more affected by the El Niño event is their inability to meet their food or body requirment. Larger iguanas need more algae to sustain their body size and maintain their metabolism. When an El Niño event occurs, the reduced algae growth makes it difficult for these larger iguanas to find enough food.
What is El Nino event?
El Niño happens around the Pacific Ocean area. It is known to happen every two to seven years.
When an El Niño event happens the normal trade winds is reversed. This can cause warm water to move towards the eastern Pacific.
El Niño events can also affect ocean currents and marine life. The event can lead to fishery reduction and coral bleaching.
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Using the information from the reading, create a biomass diagram using lions/buffaloes/grasses what do you think it would look like based on what you know about the 10% rule?
Answer: It depends on the reading, but it should show the grass with the most energy, the buffalo with 90% less energy than the grass, and the lions with 90% less energy than the buffalo
Explanation: The ten percent rule states that, when energy is transferred from one organism to another, only 10% of the energy is conserved. The other 90% is lost as heat. So, heterotrophs (organisms that produce their own energy) like the grass would have the most energy, the buffalo would only receive 10% of that, and the lions only 10% of the buffalos' energy.
Why is nonpoint source pollution difficult to control? (Site 2)
identify each of the relationship described below as Predation, Parasitism, Mutualism
or Commensalism.
Epiphytic ferns, which attach themselves to the trunks of large rainforest trees as a means of support.
Answer:
Commensalism
Explanation:
The trees are not being harmed by the ferns' attachment, but also do not gain anything from the relationship, The ferns gain a supportive, stable environment. Since one organism has a positive gain while the other has no advantage in the relationship, it is commensalism.
Procedure for observing slide under microscope
A group of students did a biotechnology experiment with fermented coconut water and certain micro-organism, so the product produced several characteristics: Fluffy and a little bit taste sour, based on the data can be concluded that the micro-organism is
A. Acetobacter xylinum that changes glucose to cellulose and excess acetic acid
B. Lactobacillus bulgaricus that change glucose to cellulose and excess lactic acid
C. Neurospora sitophila that change protein to citric acid
D. Saccharomyces cerevisiae that changes starch to alcohol and CO
It can be concluded that the micro-organism is Acetobacter xylinum that changes glucose to cellulose and excess acetic acid. Option A
What is Acetobacter xylinum?From the experiment with fermented coconut water and a micro-organism, it could be deduced that the the fluffiness and soar taste are characteristics of the micro-organism involved called Acetobacter xylinum.
Acetobacter xylinum is a species of acetic acid bacteria that is known for its ability to convert glucose into cellulose and acetic acid. This produces a gel-like fluffiness.
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Which of the following is a benefit of renewable energy?
O It is unlimited or quickly replenished.
OIt costs less to use than fossil fuels.
OIt is from clean energy sources.
OIt uses man-made resources.
Answer: it is unlimited or quickly replenished
Help me please I will be happy
Answer:
C. The Earths Core (Center)
Explanation:
I took the test.
what are
two positive and two negative effects of land use by humans.
Answer: Positive:
1. Keep humans alive
2. Adequate food
Negative:
1. pollution
2. over population
Explanation:
A small forest stood on the edge of an expanding city. In the middle of the forest was a large pond, which arose from a natural spring. As the city expanded, the forest was cut down, the pond drained, and the area paved over for a mall and office buildings. After five years, the average humidity of the area seemed to have decreased. Use your knowledge of the water cycle to interpret this observation.
Explanation:
The water cycle ( aka the hydrological cycle ) is a biogeochemical cycle which illustrates the constant movement of water on, above and below the Earth's surface.
The water cycle plays a major function in the sustainability of life on Earth as most living organisms can't do without water. Because the cycle is a natural process, it depends on natural presences for its continuation and those presences certainly do not include office buildings and malls.
Plants contribute majorly to the water cycle, as do animals, but not on such a large scale as plants. Green plants give off water in its gaseous state (water vapour) through the process of transpiration which is one of the key stages in the water cycle. Green plants also absorb and make use of the water in the earth's soil which is made possible through the process of percolation, another key component of the hydrological cycle.
For the scenario stated in the question, because the trees which made up the forest were cut down to give way for the city's expansion, there was an alteration in that region's water cycle. The pond which was sustaining and being sustained by their roles in the efficient circulation of water, naturally began to dry up with their decreasing numbers.
Thus, the humidity of the area ultimately decreased with time because of this alteration.
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