Answer:
iodine solution turned blue-black when added to it
Explanation:
the leaf is boiled in water to kill the cells and soften them for iodine to penetrate .
boil the leaf in ethanol to dissolve chlorophyll
rinse the leaf and let it cool then add drops of iodine on it and observe the colour change
A delta is a formation built up by?
A river delta is a landform created by deposition of sediment that is carried by a river as the flow leaves its mouth and enters slower-moving or stagnant water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, or (more rarely) another river that cannot carry away the supplied sediment.
Answer:
Delta is build up by continuous deposition of sediments, which makes the water shallow, causing the landform to rise above the sea level. A delta is divided into four parts, i.e. subaqueous, subaerial, lower delta plain, upper delta plain.
Explanation:
A certain type of butterfly that feeds on the on the green leaves of a plant. Some of the butterflies are green and some are yellow. These butterflies are a favorite food for a certain bird. Which type of butterflies will become more common when these birds move into this ‘environment?
The yellow butterflies
The green butterflies
Both yellow and green butterflies
None
Answer:
The yellow butterflies will become the "favorite food" for the bird as their color stands out more than the color of green butterflies.
When comparing protein-coding DNA sequences of similar genes in related species, you find that some of the sequences are longer in one species compared to the other. Which answer option is the most likely number of extra bases that you would find
The most likely number of extra bases that you would find during changes in protein-coding DNA sequences is one.
What is a Codon?This is defined as a sequence of three nucleotides which form a unit of genetic code in a DNA or RNA.
Since codons have 3 nucleotides then the most likely number of extra bases could be one which will code for a different protein.
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Which of the following statements is true regarding physical
changes?
SELECT ANSWER
A: Burning a log of firewood into ashes is an example of a
physical change.
B: physical change results in a change in the
composition of a substance.
C : Physical changes can be reversed.
D Melting sugar in water is an example of a physical
change.
Answer:
C. Physical change can be reversed.
Genes organized into an operon are beneficial to certain bacteria because the operon allows for:.
Answer:
coordinated regulation of a group of genes that encode proteins with a common function.
A plant can have either brown (B) or red (b) leaves. Brown is the dominant
trait. If a plant has genotype bb, which best describes the plant?
Answer:
The plant would be red.
Explanation:
It would be red because red leaves are a recessive trait which has lowercase b's so if the genotype for the plant is bb, it would be red. If the plant had BB, it would be brown and if it had Bb it would be brown but, it would be a carrier of the red gene.
Dorsal roots contain axons that bring ______ information to the spinal cord and ventral roots contain axons that bring _______ commands away from the spinal cord.
Answer:
sensory/motor
Explanation:
Dorsal roots contain axons that bring sensory information to the spinal cord and ventral roots contain axons that bring motor commands away from the spinal cord.
which climate zone has hot summer, cold winter, and average amounts of precipitation throughout the year
Explain the role of rna polymerase during transcription.
Answer:
Responsible for copying a DNA sequence into an RNA sequence, during the process of transcription.
How can a protein recognize a specific sequence of dna
What is the difference between freshwater standing-water habitats and running-water habitats?.
First photo of dna which helped scientists understand its structure.
Answer:
Franklin´s Photo 51 helped scientists learn more about the three-dimensional structure of DNA and enabled scientists to understand DNA´s role in heredity. X-ray crystallography, the technique Franklin used to produce Photo 51 of DNA, is a method scientists use to determine the three-dimensional structure of a crystal
Explanation:
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How were clones created prior to the creation of Dolly?
Drag each tile to the correct location. classify the energy sources as renewable or nonrenewable. energy obtained from water springs inside the earth energy obtained from natural gas energy obtained from coal energy obtained from burning plant waste
Renewable energy sources are the sources which can never be exhausted. This can include natural gas and water from spring in earth. non-renewable are the one which are exhaustible, which include coal energy
What are the types of energy resource?Renewable sources of energy involves sunlight, water, biomass, etc. This can be replenished naturally.
Nonrenewable sources includes energy from fossils, coal, petroleum, etc. These are the resources if once exhausted can never be replenished or will take millions of years to replenish.
Thus, on this basis one can say that water spring inside the earth, energy from natural gas are renewable sources of energy while energy from coal energy from burning plants is non-renewable energy resource.
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Use the drop-down menus to correctly order the steps for setting up a microscope.
Switch to the highest-power objective.
Rotate the lowest-power objective into place.
Use the fine focus knob to sharpen the image.
Be sure the stage is at the lowest setting.
Place the slide on the stage and secure it in place
Answer:
4
2
5
1
3
Explanation: I just did this right now
Explanation:
there are the answer all the answer are good
the cell cycle is a repeating sequence of cellular growth and division during the life of
Answer:
The cell cycle is a repeating sequence of cellular growth and division during the life of an organism.
Explanation:
A cell spends most of its time during the first three phases of the cycle. This is called interphase. A cell will ONLY enter the last two phases when it is about to divide. Once again, the cell cycle is a repeating sequence of cellular growth and division during the life of an organism.
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Approximately 5% of the cytosine residues are methylated in the genome of any given eukaryote. In what way is dna methylation related to genetic regulation?.
DNA methylation is related to genetic regulation because this epigenetic mark can turn on/off certain genes.
What is epigenetics?Epigenetics can be defined as any heritable pattern in gene expression that does not involve different nucleotide sequences.
Epigenetic modifications include DNA methylation and histone modifications (e.g., histone acetylation).
These epigenetic marks are able to turn on or turn off specific genes during differential gene expression.
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Progressive muscle relaxation involves deliberate and continuous relaxing of various muscle groups in the body.
a. True
b. False
Progressive muscle relaxation involves the deliberate and continuous relaxing of various muscle groups in the body.
Why is this statement true?This statement is true because it accurately describes the technique of progressive muscle relaxation. This is a method for reducing stress in which the individual actively relaxes muscle groups one by one.
Therefore, we can confirm that this statement to in fact be true in that Progressive muscle relaxation involves deliberate and continuous relaxing of various muscle groups in the body.
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Halons contain halogens, which are highly reactive with oxygen. please select the best answer from the choices provided t f
Answer:
IT"S TRUE
Explanation:
TRUE!E 2022
The data shows the changes in temperature and the concentration of carbon dioxide (CO2) in Earth’s atmosphere during the past eight hundred thousand years.
Which statement describes the overall relationship between the concentration of carbon dioxide and atmospheric temperature?
A The temperature of Earth increases with a decrease in atmospheric carbon dioxide.
B The temperature of Earth increases with an increase in atmospheric carbon dioxide.
C The temperature of Earth remains unchanged with an increase in atmospheric carbon dioxide.
D The temperature of Earth remains unchanged with a decrease in atmospheric carbon dioxide.
Plaque buildup in the arteries of the limbs is called.
Answer:
Atherosclerosis
What age is most appropriate for making many repetitive requests?
Two
Ten
Fourteen
Sixteen
Answer:
I think that the answer is A) Two.
Why are none of the outer planets likely to support life similar to that of Earth ?
Answer:
Because of outer planets' extreme environments, it is improbable that they would contain any life. Outer planets are the farthest from the Sun; as a result, some lack necessary heat to support life, while others are hotter than expected for undetermined reasons.
Explanation:
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At a crime scene you find a piece of glass with a red, dried liquid, and a yellow fiber on the edge lying on the ground. Upon closer inspection, you notice
that there is also a smudged fingerprint crossing the center of the glass. Your job is to plan and carry out an investigation to analyze this evidence. Explain
how you would collect,
preserve and analyze this evidence. What would you hope to find out from this piece of evidence? Indicate whether the glass, red liquid, fingerprint and yellow fiber are each individual or class evidence. Why?
Answer:
For smaller glass fragments should be placed in a paper packet and then in an envelope. Larger pieces should be wrapped securely in paper or cardboard and then placed in a padded cardboard box to prevent further breakage. For analyzing the glass I would start by comparing the refractive index of the sample to that of the possible source. Examination of samples under a regular microscope or a scanning electron microscope can give detailed information about the sample's physical and chemical characteristics. Since the liquid is already dried all you'd have to do is make sure to package it in paper which works since the glass can go in that. For the fiber I would remove it from the glass and collect it with some trace tape. Then the easiest method to get the fingerprint is called dusting, in which I would use a very fine powder that can stick to the oil in the fingerprint. Once the fingerprint becomes visible, lift it from the surface with clear tape and transfer it to another surface to then take into the laboratory to analyze further.
Glass, the liquid and the fiber would be class evidence while the fingerprint is individual.
Explanation:
Which sentence from the passage gives the best clue of what organizational pattern is used?a. "they have much larger ears than asian elephants. "b. "elephants have the largest brains of any land mammal. "c. "they are known to be very intelligent animals. "d. "they normally live between 50 and 70 years. "
'They have much larger ears than asian elephants' is the sentence which describes how organizational pattern is used.
What is Organizational pattern?This is used to show relationships between supporting details in a passage or text.
The sentence which depicts this from the passage is 'They have much larger ears than asian elephants'.
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describe how glucose formed in a leaf becomes starch stored in a potato tuber
↪Glucose is usually converted into starch for storage. Starch is better for storage than glucose because it is insoluble. Plants like potatoes and other tubers, and also fruits like the banana store starch for later use. This starch is stored by special organelles, or cell subunits called amyloplasts.
☆...hope this helps...☆
Answer:
dehydration synthesis
Explanation:
monomers of the sugar glucose combine to form a single molecule of the sugar maltose. One of the glucose molecules loses an H, the other loses an OH group, and a water molecule is released when the water molecule is lost its no longer soluble hence its stored in the tuber as starch
What is converted to electricity at geothermal power plants? at geothermal power plants, is converted to electricity.
Use of steam is the integral part of process in most power plants. In geothermal power plants, thermal energy (heat) from Earth is converted to electricity.
What is geothermal power plants?Geothermal power plants are used to generate electricity using Earth's thermal energy.
The process requires following steps.
Hot water is pumped under high pressure from deep underground through a well.Heating of water and its movement through a turbine creates thermal energy.In next step, it gets converted to electricity. The steam rotates the turbine that activates a generator which helps in producing electricity.Thus, it can be concluded as thermal energy is converted to electricity at geothermal power plants.
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How can two organisms with a dominant trait for a specific feature produce an organism with a recessive trait for the same feature?
Answer:
because one of the organisms is heterozygous.
Explanation:
When an organism is heterozygous it carries both a dominant and a recessive allele therefore two organisms that are dominant for a specific trait can produce an organism with a recessive trait because one of those two organisms is heterozygous.
What is the measurement of gravity
Answer:
Gravity is measured by the acceleration that it gives to freely falling objects. At Earth's surface the acceleration of gravity is about 9.8 metres (32 feet) per second per second. Thus, for every second an object is in free fall, its speed increases by about 9.8 metres per second.
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A car follows a curved highway from point C to point D, covering a distance of
100 kilometers and displacement of 80 kilometers to the south in 2 hours.
What is speed and velocity of the car in kilometers per hour?
Answer:
102 kilometer
Explanation:
because when something goes kilometers you add the time plus how much kilometers