Demonstrate the process of osmosis in a living plant material
Answer:
To demonstrate osmosis by this experiment an egg is taken. On the pointed side of the egg a small hole is formed and all the white and yellow matter of the egg is taken out through this hole. Now the empty egg is placed in the dilute solution of hydrochloric acid (HCl), so that the hard shell of the egg constituted of calcium carbonate is dissolved in it
Explanation:
.
Which of these changes to fuel consumption would lessen human
impacts on global climate?
Select one:
A) Decreasing research of all wind or water-based electricity generation technologies
B) Switching from coal to natural gas or nuclear energy to generate electricity
C) Increasing electricity production from coal
D) Banning any form of carbon emissions trading programs
Switching from coal to natural gas or nuclear energy to generate electricity will lessen human impacts on the global climate.
What is climate change?It is the changes to climate brought about by anthropological emission of greenhouse gases.
Greenhouse gases are emitted from human actions such as the burning of coal, removal and burning of forest layers, etc.
Thus, in order to lower human impacts on climate, replacing activities such as the burning of coal with clean technology such as nuclear energy to generate electricity would go a long way.
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what is the function of photosystems
Answer:
Photosystems are the functional units for photosynthesis, defined by a particular pigment organization and association patterns, whose work is the absorption and transfer of light energy, which implies transfer of electrons. Physically, photosystems are found in the thylakoid membranes.
Explanation:
The main functions of a photosystem are: they are a functional unit of photosynthesis, and they trap or release light.
What is a photosystem?Plants, algae, and cyanobacteria all have thylakoid membranes that contain photosystems. These membranes are found in the cytoplasmic membrane of photosynthetic bacteria as well as the chloroplasts of plants, algae, and other vascular organisms. The PSI and PSII subtypes of photosystems exist.
The functional components of photosynthesis are called photosystem, and they are identified by specific pigment organization and association patterns.
Therefore, the photosystem is responsible for absorbing and transferring light energy, which entails transferring electrons. The thylakoid membranes contain photosystem in terms of physical location.
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What two characteristics define an air mass?
Answer:
What two main characteristics are used to classify air masses? Temperature and humidity are two characteristics used to classify air masses.
Describe one advantage prokaryote have over eukaryote cells?
Answer:
Prokaryotes have the most primitive and simplest form of the cellular structure. This advantage the prokaryotes advantages over the eukaryotes in quick reproduction and easy adaptation to any new environment. ... An advantage of eukaryotic cells over prokaryotic cells include compartmentalization in the form of organelles.
The priciples of probability can be used to biology
Answer:
to predict the outcomes of genetic crosses.Punnett squares can be used to predict and compare the genetic variations that will result from a cross.
hope this helps!!:)
Explanation:
Which coastline should have the largest waves? The arrow represents wind direction.
A.
B.
C.
D.
 The tool that measures air pressure is called what?
Answer: A barometer !
Explanation:
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Which process is identified by number 1 in the diagram and where in the cell does this process occur?
DNA
mRNA
Protein
1
2
O replication; during the cell cycle
O transcription; in the nucleus of the cell
translation; at the ribosome
transcription; at the ribosome
The process is identified by number 1 in the diagram and where in the cell does this process occur is translation, at the ribosome. Thus option 3 is correct.
What is translation?Translation is defined as the process by which a messenger RNA (mRNA) molecule's sequence is converted into an amino acid sequence during protein synthesis.
It is also be defined as when DNA is converted to RNA in the cell's nucleus, the process through which ribosomes in the cytoplasm or endoplasmic reticulum synthesize proteins. Gene expression refers to the entire process.
Initiation, elongation, and termination are the three phases of an mRNA molecule's translation by the ribosome.
Thus, the process is identified by number 1 in the diagram and where in the cell does this process occur is translation, at the ribosome. Thus option 3 is correct.
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what if living cells released all their energy at once
Answer:
they will lose their energy and die
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For which reasons would a male peacock spread his
tail feathers? Check all that apply.
to cool off his body
to attract a peahen
to show that he is healthy
to protect his peachicks
to intimidate rival males
O to run from a predator
Answer:
to intimidate his predators
Explanation:
The reasons would a male peacock spread his tail feathers to intimidate rival males. Thus, option E is correct.
What are the principles of natural selection?For natural selection to occur, four basic conditions are necessary:
Reproduction: organisms must reproduce to form new generations;Variability: there must be differences between individuals in the population;Heredity: Descendants must inherit characteristics from their parents.Natural selection has been known as the evolutionary mechanism proposed by Charles Darwin, who stated that the environment acts as a selector of characteristics, perpetuating the organisms best able to survive in a given place.
Genes that encode bright feathers give an advantage to the male peacocks over other males which do not have an equally bright assortment of feathers, increasing the individual's reproductive success. This results in the advantageous genes such as of bright feathers recurring over the generations and remaining a part of the gene pool.
Therefore, The reasons would a male peacock spread his tail feathers to intimidate rival males. Thus, option E is correct.
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How did cyanobacteria aid the evolution of complex life on land? Do you think cyanobacteria are as significant to this process today as they were during Precambrian time?
Answer:
Oxygen, origin of plants and chloroplast.
Explanation:
The oxygen present in our atmosphere was generated by various species of cyanobacteria during the Archaean and Proterozoic Eras. origin of plants on the earth is other great contribution of the cyanobacteria. The chloroplast which is present in plants due to which they make their own food is actually a cyanobacterium living within the plant's cells.
What is so special about the Cooper's hawk nucleus.
Answer:
Cooper's hawk is a medium-sized hawk and largish for an Accipiter. Compared to related species, they tend to have moderate-length wings, a long, often graduated or even wedge-shaped tail and long though fairly thick legs and toes.
Living in or produced by the ocean
. Purification
. Recycling
. Biodiversity
. Oceanic
. Terrestrial
What is the name of the binding site of RNA polymerase in eukaryotes?
F. operator
G. inducer
H. operon
J. promoter
Answer:
J. promoter
Explanation:
The promoter is the name of the binding site of RNA polymerase in eukaryotes.
Determine the amino acid chain that would result from the sequence AUG-CCC-GGA-UUA-UAG.
Answer:
methionine-proline-glycine-leucine-stop
Explanation:
Using an amino acids chart, you can line up the 3 bases in each section to find the protein chain that corresponds. The stop at the end marks the end of protein synthesis, which ends the sequence.
The compound comprising carboxylic and amino groups is called amino acids. They are vital for the formation of proteins in the cells.
Sequences are read in the three pairs of codons in the form of triplets to form a form an amino acids sequence.
The amino acid sequence that will be formed from the given sequence AUG-CCC-GGA-UUA-UAG will be:
methionine-proline-glycine-leucine-amber
AUG is the start codon which also codes for the amino acid methionine.CCC codes for the amino acid proline and its one-letter code will be P.GGA is glycine and is abbreviated as G.UUA codes for leucine and is represented by U.UAG is the amber or the stop codon which is responsible for terminating the sequence.Therefore, Met-Pro- Gly- Leu- Amber is the amino acid sequence.
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Akshay decides one day to run a marathon without any training. After 10 minutes your lapsed and akashay, has run half a mile, he begins to get cramps in his thigh he's also breathing very rapidly what is causing the cramps on his legs?
Answer:
Lactic acid accumulation in the leg muscles
Explanation:
Muscle cramps are painful feelings caused by sudden contractions of the muscle. Cramps are caused by several reasons, however, based on the description of Akashay's activity, it is caused by ACCUMULATION OF LACTIC ACID in the leg muscles due to strenuous exercise.
According to this question, Akashay decided to run a marathon without any prior training. However, he started to get cramps on his thigh coupled with rapid breathing. There is a lack of oxygen in his cells, hence, anaerobic respiration was used leading to the formation of lactic acid. The buildup of lactic acid is what causes the painful sensation called CRAMP.
how does climate and vegetation vary with latitude and elevation?
Answer:
Climate and vegetation vary with latitude and altitude of an area. Latitude measures distance from the equator; altitude measures elevation above sea level. ... Deserts have little precipitation and little vegetation. They are found in tropical, temperate, and Polar Regions.
The climate and vegetation may significantly vary with the latitude and elevation. This is because as elevation increases the temperature decreases gradually that do not favor the actual growth of vegetation.
What is Climate?Climate may be defined as a type of weather conditions that are persuading in any geographical location for a long period of time. In a more simple sense, it is characterized as the long-term pattern of weather in a particular area.
Latitude estimates the distance from the equator part of the earth and goes through the tropical, temperate, and colder regions of the earth. The vegetation is typically reduced with increasing the altitude or elevation with respect to the sea level.
It may also be noticed that the vegetation may alter with respect to the geographical location of the whole earth. It was never found to be completely absent.
Therefore, the climate and vegetation may significantly vary with the latitude and elevation.
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Which of the following is an example of a negative tropism?
A. stems and leaves growing upward
B. leaves curling when touched
C. roots growing downward
D. leaves turning toward the light
Please help ASAP
Answer: B because leaves curling when touched is a negative tropism
Explanation:
Make a claim about whether the sun's rays are mechanical or electromagnetic waves. Summarize evidence to support this claim and explain your reasoning.
Answer:
Se explanation
Explanation:
Mechanical waves are waves that require a material medium for propagation e.g sound waves and waves on a spiral spring.
Electromagnetic waves do not require a material medium for propagation. They can travel through space.
The light and heat of the sun are far away in outer space yet they reach us on earth. There is no intervening medium between the earth and the sun that conducts its rays to the earth. As a result of this, we can conclude that the rays from the sun are electromagnetic waves.
A person infected with the human immunodeficiency virus (HIV) may not have any symptoms for an
extended period of time. This information suggests that the reproductive cycle of the HIV virus is —
1. lysogenic, because the virus develops over a long period of time
2. lytic, because the virus causes an autoimmune disease and eventually death
3. lysogenic, because the virus primarily affects older people
4. lytic, because of the quick onset of symptoms after infection
Could you help me figure this out?
The cilia serve to transport dust and other foreign particles, trapped inmucous, to the back of the nasal cavity and to the pharynx. There the mucus iseither coughed out, or swallowed and digested by powerful stomach acids. After passing through the nasal cavity, the air flows down the pharynx to thelarynx.
1 point
This picture shows a cross-section of a blood vessel. The diameter of the
lumen in Figure 10 is 25.0 mm. What is the actual diameter of the lumen of
this blood vessel?
lumen
magnification X8
3.1 x 10-2m
3.1 x 10-3 m
O 2.0 x 10-2 m
2.0 x 10-3 m
Answer:
B. 3.12 x [tex]10^{-3}[/tex] m
Explanation:
From the given picture, it can be deduced that;
the diameter of the image of lumen = 25.0 mm
= 25.0 ÷ 1000
= 0.025 m
And,
magnification = [tex]\frac{diameter of the image of lumen}{actual diameter of lumen}[/tex]
But magnification = 8,and diameter of the image of lumen = 0.025 m.
So that;
8 = [tex]\frac{0.025}{actual diameter of lumen}[/tex]
⇒ actual diameter of lumen = [tex]\frac{0.025}{8}[/tex]
= 0.003125
Actual diameter of lumen of the blood vessel is 3.12 x [tex]10^{-3}[/tex] m.
What's a energy pyramid
Answer:
it's the way energy moves up through the trophic levels. the higher the level you are the less energy there is.
Explanation:
which enzyme is responsible for creating a primer that allows the DNA replication process to start
Answer:
Primase
Explanation:
Primase: the enzyme responsible for initiating synthesis of RNA primers on the lagging strand during DNA replication.
Answer:
Primase
Explanation:
10 POINTS QUESTION: Objects of different masses are suspended from a height. Which combination of features will have the greatest gravitational potential energy?
A. high mass and high height
B. high mass and low height
C. low mass and low height
D. low mass and high height
Answer: high mass and high height
Explanation:
The gravitational potential energy is refered as the potential energy that has to do with the energy in a particular object due to the height of that object.
With the above explanation, when objects that have different masses are suspended from a height, the one that will have the greatest gravitational potential energy will be the one with a high mass and high height.
Therefore, the correct option is A.
List down 5 evidence of exogenic processes and show how it affects or how it is affected by human activities.
Answer:
Mass wasting has drastic effects on human and animals life in the form of landsliding , earthquakes . Deposition is the pres in which sediments , rocks and soil are added land mass . A positive effect of deposition is that it creates new land . And negative effect is it takes away new lands .
The five (5) evidence of exogenic processes on Earth's surface include the following:
1. Weathering.
2. Stripping.
3. Erosion.
4. Mass wasting.
5. Deposition.
Exogenic processes can be defined as the processes that occur at or near the surface of planet Earth due to the action (influence) of exogenic forces or geomorphic agents.
The five (5) evidence of exogenic processes on Earth's surface include the following:
1. Weathering: the removal of various minerals from rocks causes depletion in oil and gas reserves that may be available for human consumption.
2. Stripping: it involves the removal of essential chemical elements and components from precious stones and landform such as a mountain.
3. Erosion: this causes flooding and washing away of various soil nutrients and as such affects agriculture.
4. Mass wasting: it moves rock debris, soil nutrients, and regolith downward, which are substances that are useful for certain human activities such as during mining.
5. Deposition: it is a consequence of erosion and it result in the laying down of sediment on a landform or landmass.
This sometimes make the foundation of buildings stronger to withstand stress.
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What happens as changing global temperatures affect polar ice?
Answer: OMG THIS IS SOMETHING I KNOW ABOUT!! OKAYYY. When the global temperatures affect the polar ice, the ice start to melt. If the ice melts then the polar bears could loose their home, and would not have any other place to live. Polar bears need a very cold place to live, because it's suitable for them. Umm also The polar ice could eventually flood some parts of the earth causing a global flood!!
Explanation: Also if they have any left, sign the petition to save the polar bears.... they need help fastt! also, they (trump) want to drill into the ice to get some type of "oil" out the ice!! Please they need help!
Why is water important for living organisms?
Answer:
. ... . ....
how does water get into the aquifer? i will mark branliest if you answer correct!
Answer:
Water gets into an aquifer from the land surface
Answer:
Water gets into an aquifer from the land surface. Typically, precipitation falling onto the Earth's surface soaks into the ground and flows down to the water table.
Explanation:
Most wells do not get their water from underground rivers, but instead get the water from aquifers. Aquifers are layers of rock and soil with water flowing through their small pores. ... New water, such as from rain or melting snow, drips down into the ground through the pores and cracks in the rocks and soil. Groundwater is transported through aquifers because of two main reasons: gravity and pressure. In unconfined aquifers, which we concentrate on because they are more likely to be contaminated, water always flows from high points to low points because of gravity.