A plant with variegated (two-coloured) leaves was left in the sun for several hours. A piece of one of its leaves were then detached (removed) and tested for sugar.

Explain, as fully as you can, why the yellow region of the leaf had not produced sugar. (5 marks)

Answers

Answer 1

Answer:

The yellow leaf was not exposed to the sun so it can't produce sugar.

Explanation:

The yellow region of the leaf didn't produce sugar because it wasn't exposed to sunlight. Part of the leaf was exposed to the sun, thus this leaf produced sugar, while the yellow part of the leaf did not because it was not exposed to the sunlight.


Related Questions

What is a good property of an indicator?

Answers

Answer:

Acid base indicators are weak and acids and bases, which are used to signify the end point of neutralization reaction. The type of indicator used for a neutralization reaction depends on the strength of the acid and the base, that are involved in the reaction. A good acid base indicator must have a good pH range and it must be able to produce specific and identifiable color in specific acid base medium.

or

Two good properties of an indicator are as follows-

1) It should be specific- It means that the changes, which are measured by the indicator should be expressed in precise terms so that appropriate assessment could be made.

2) It should be time bound- This means that the measurable changes should arrive withing a particular time limit.

Example of indicator- Litmus is an acid base indicator that turns acidic solutions red and basic solutions into blue color.

what is reflex action?

Answers

Reflex action is the response to a stimulus. The spinal cord along with the brain stem is responsible for the reflex movement.
For example : when you touch a hot object you immediately remove your hand from it
reflex is made possible by neural pathways called reflex arcs which can act on an impulse before that impulse reaches the brain.

what are the two important roles of gut movement?

Answers

These movements enable food to progress along the digestive tract while, at the same time, ensuring the absorption of the important nutrients. Techniques of measuring these movements of the gut enable us to recognize the normal patterns of contraction in each of the regions

Answer:

These movements enable food to progress along the digestive tract while, at the same time, ensuring the absorption of the important nutrients. Techniques of measuring these movements of the gut enable us to recognize the normal patterns of contraction in each of the regions

Explanation:

Bacteria convert nitrogen gas from the atmosphere into nitrates which are
usable by plants through a process called

Answers

Answer:

Nitrogen Fixation

Explanation:

The conversion of nitrogen gas into nitrates and nitrates through atmosphere, industrial and biological process is called nitrogen fixation. Atmospheric nitrogen must be processed, or 'fixed', into a usable form to be taken up by plant.

What are the inputs and outputs of cellular respiration and photosynthesis?
energy
water
oxygen
sugar
carbon
dioxide
Photosynthesis
Cellular Respiration
Inputs
Outputs

Answers

Photosynthesis

inputs : water , carbondioxide,

outputs: oxygen, sugar

Cellular respiration

inputs : sugar, oxygen

outputs: water, carbon dioxide

What might happen to the organisms in the food web below if the number of phytoplankton and vegetation drastically decreased?

Answers

Answer:

i don't now exactly how to answer this when theres' no food chart however as the vegetation and phytoplankton drastically decrease everything decreases. This is because the producer the bottom of the food chain also known as vegetation is the prime source of energy in every food chain. when there's scarce amounts of producers a domino  affect will occur.  There will be no food for the first consumers to eat leading their population to decrease and the animals that feed off them will decrease then the animals that feed of them will decrease and so on until the organisms of the food web die out.

How are viruses different from Bacteriophages?

Answers

Answer: It's different because it is a bacteria eater.

Explanation: A bacteriophage is a type of virus that infects bacteria. In fact, the word "bacteriophage" literally means "bacteria eater," because bacteriophages destroy their host cells. All bacteriophages are composed of a nucleic acid molecule that is surrounded by a protein structure.

Hope this helps! Stay safe :))))

Answer:

Even bacteria can get a virus! The viruses that infect bacteria are called bacteriophages.

Explanation:

A bacteriophage is a virus that infects bacteria.

A bacteriophage, or phage for short, is a virus that infects bacteria. Like other types of viruses, bacteriophages vary a lot in their shape and genetic material.

Would you expect the plants and animals present in the southeast of the U.S. To be similar or different to that of the plants and animals present in Northeast Africa?

Answers

Answer:

Different

Explanation:

The climatic conditions or weather conditions of the southeast of the United States are different to that of the northeast Africa. And because of this, the two zones are not expected to have the same type of animals.

For example, the weather conditions of the southeast of the United States are humid and thunderstorms, while that of the northeast Africa are hot and dry.

Which part of the cell control the cell activities

Answers

Answer: The answer would be nucleus.

Explanation:

The nucleus is well known for the command center. That’s how you get the answer.

Answer:

the nucleus

Explanation:

Which DNA fingering technique examines the length variation of DNA repeat sequences in human DNA?

A) VNTRs (variable tandem repeats)

B) PCR (polymerase chain reaction) analysis

C) STRs (short tandem repeats)

D mtDNA (mitochondrial DNA) analysis ​

Answers

Answer: The question is incorrect, below is the correct question

Which DNA FINGERPRINTING technique examines the length variation of DNA repeat sequences in human DNA?

The correct answer to the question is option D

mtDNA (mitochondrial DNA) analysis

Explanation: DNA fingerprinting technique is a laboratory technique used by geneticists.it entails placing of DNA samples into wells,these wells are then placed in a slab of gels and thereafter passing a current through the gel.This is done to ascertain the uniqueness of a DNA pattern and thus be able to differentiate people of same species.

There are several methods of DNA fingerprinting as outlined in the options given with the question.

In mtDNA (mitochondrial DNA) analysis,The Genetic samples are extracted from the biological materials, these samples extracted are total genomic DNA like hair,tooth or samples of blood, Several copies of these genomic DNA are then produced using a polymerase chain reaction and flanking primers inorder to examines the length variation of DNA repeat sequences in human DNA.

Answer:

D. Mitochondrial DNA Analysis

Explanation:

Edg 2021



Why are human populations not limited by the carrying capacity of their ecosystems?

Answers

Answer:

humans use their knowledge to locate resources.

Explanation:

The carrying capacity can be defined as the maximum number of individuals in a population of a species that an ecosystem or region can support on the basis of availability of water, food, habitat and other needs necessary for survival. Sometimes, the population of the species increases exponentially exceeding the carrying capacity of an ecosystem when the resources available are surplus.  

The human populations are not limited by the carrying capacity of their ecosystem this is because of the fact human beings possess special intellectual and thinking abilities which make them capable of availing themselves resources. They posses knowledge which allows them to search, and find resources even from the earth extreme locations not suitable for survival.

brainiess plsssss

How Are We Able to See the Moon?

Answers

Answer:

We can see the Moon as the sunlight reflects to us on the Earth from its surface.

Explanation:

We can see the Moon as the sunlight reflects to us on the Earth from its surface. The surface of the moon is very rocky and fairly dark. However, it provides enough light at night as it is so close to the earth. Everyone see the Moon at different positions at the same time.

The Moon also circles once around the Earth during a month.

Choose the FALSE statement about the space shuttle program. A. It lasted over 30 years. B. It launched the Hubble Space Telescope. C. It conducted scientific experiments in lunar orbit. D. It helped in the creation of the International Space Station.

Answers

Answer: C. It conducted scientific experiments in lunar orbit

The space shuttle can only get as high as the low-earth orbit (LEO). This is a few hundred or so miles within the earth's surface. Compare this to the distance from the earth's surface to the moon is about 238,855 miles on average.

According to NASA's website: "It does not carry enough propellant to leave Earth's orbit and travel to the Moon. The Space Shuttle also is not designed to land on the Moon since it lands like an airplane and the Moon has no atmosphere"

Why mosquitoes bite us only at night

Answers

Answer:

Mosquitoes are most active at night because sun exposure can dehydrate them and could possibly lead to death.

Explanation:

Mosquitoes bite us at night because that is when they feed because the sunlight can dehydrate them which could lead to death.

The___is also called the dark reaction in photosynthesis

Answers

Answer:

The answer is Carbon-Fixing Reactions or Light Independent Reactions.

Explanation:

Which feature is created by deposition from rivers

Answers

Answer:

Explanation:

The answer is meanders

Hope this helps

Plz mark it as brainliest!!!!!!!!!

Answer:

The person is right


Who first suggested the theory of evolution by natural selection?
O A. Charles Darwin
B. Wilhelm Weinberg
C. Gregor Mendel
D. Thomas Malthus

Answers

Charles Darwin!
Darwin and a scientist contemporary of his, Alfred Russel Wallace, proposed that evolution occurs because of a phenomenon called natural selection.

Charles Darwin first suggested the theory of evolution by natural selection.  Therefore, option (A) is correct.

Who was Charles Darwin?

Darwin was a British naturalist who conducted extensive research and observation during his travels around the world, and his work culminated in the publication of "On the Origin of Species" in 1859. In this seminal work, Darwin proposed that species evolve over time through a process he called natural selection, which involves the differential survival and reproduction of individuals with advantageous traits.

This theory challenged the prevailing view of species as unchanging, fixed entities and revolutionized the field of biology. While Darwin was not the first to propose the idea of evolution, his theory of natural selection provided a mechanism to explain how it occurs and remains one of the most important and influential ideas in the history of science.

Learn more about Charles Darwin, here:

https://brainly.com/question/16484823

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Which is one way that minerals crytallize from materials dissolved in water
From the air
From solutions that evaporate
From hot water solutions when water boils
From the soil

Answers

Answer:

From solutions that evaporate

Explanation:

Minerals can form in different ways. According to the question, minerals crystallize from a material dissolved in water when the solution evaporates. When a material dissolves in water, it forms a solution i.e. water + dissolved material.

The element constituents of the solution can aggregate to form a solid mineral, which will be left to crystallize when the solution undergoes evaporation i.e. liquid changes to gas. A very good example is when salt dissolves in water to form a salt water solution. When the water of this solution evaporates, salt crystals are left, which can crystallize to form minerals.

Answer:

From solutions that evaporate

Explanation:

which is considered a carbon sink

Answers

Answer:

are natural or artificial deposits

Answer:

natural carbon sinks are plants, the ocean and soil

what does the m stand for in interphase

Answers

M stands for mitosis. This is where the cell actually partitions the two copies of the genetic material into the two daughter cells. After M phase completes, cell division occurs and two cells are left, and the cell cycle can begin again.

Answer:

I believe the answer is mitosis

Explanation:

Hope this helps.

whats is the definition of oxymoran

Answers

An oxymoron is a figure of speech, usually one or two words, in which seemingly contradictory terms appear side by side. This contradiction is also known as a paradox.
In simple terms it’s a figure of speech that portrays self contradiction.

OR

An oxymoron is a rhetorical device that uses an ostensible self-contradiction to illustrate a rhetorical point or to reveal a paradox.

For example: you can have
“Open secret or big baby”

Search around your house. Name two examples of
objects that show mechanical energy.

Answers

Answers:

Riding a bicycle and sharping a pencil

Explanation:

Look at the following mutation: AUG-GUC-CCU-AAA → AUG-AGU-CCC-UAA-A. The base A was inserted following the start codon AUG. Describe how this mutation affects the encoded amino acid sequence.

Answers

Answer: Non sense mutation took place over here.

Explanation:

Mutation took place over here where, the base A was inserted in place of the start codon AUG.

This states that the last codon will code for a stop signal instead of amino acid.

This is a type of non sense mutation when the ribosome is stopped from reading a stretch of mRNA because a stop codon is present over there.

The original set of codon is replaced by the stop codon and the protein synthesis is stopped.

When there is an alteration in the genetic bases of codes that can lead to modification in the phenotype or the genotype of an organism is called a mutation.

The type of mutation that occurred in the given sequence is a non-sense mutation.

The mutation can be explained as:

The mutation changed the reading frame of the triplets from the second place after the AUG or the start codon.

The last codon in the unmutated sequence AAA was for lysine (lys) but in the mutated sequence is changed to UAA (stop codon) which codes for the termination of the chain.

The mutation in stop codons are called non-sense mutation and now it will signal for termination instead of coding for another amino acid.

When the process of translation gets terminated and the ribosomes stop translating due to mutation then it is called a nonsense mutation.

Therefore, the process will terminate due to replacement by a stop codon.

To learn more about non-sense mutation follow the link:

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what statement did louis pasteur confirm with his broth e

Answers

Answer:

Pasteur observed that the broth in the straight-neck flask was discolored and cloudy, while the broth in the curved-neck flask had not changed.

Explanation:

He concluded that germs in the air were able to fall unobstructed down the straight-necked flask and contaminate the broth. The other flask, however, trapped germs in its curved neck,­ preventing them from reaching the broth, which never changed color or became cloudy.

Hope this helps.

Answer:

Pasteur observed that the broth in the straight-neck flask was discolored and cloudy, while the broth in the curved-neck flask had not changed.


Which correctly lists the three plates that border the Indo-Australian Plate

Answers

Answer:

The Indo-Australian Plate includes the majority of the Indian Ocean. It borders the Eurasian Plate in the north, the Antarctic Plate in the south and the Pacific Plate in the east.

Answer:

The answer is A.

Explanation:

Pacific, Eurasian, and African.

Mutation may occur in gametes or in body cells. In which cell type is a mutation likely to be source of genetic variation for ?

Answers

Answer:

Una mutación es el cambio al azar en la secuencia de nucleótidos o en la organización del ADN (genotipo) de un ser vivo,1​ que produce una variación en las características de este y que no necesariamente se transmite a la descendencia. Se presenta de manera espontánea y súbita o por la acción de mutágenos. Este cambio estará presente en una pequeña proporción de la población (variante) o del organismo (mutación). La unidad genética capaz de mutar es el gen, la unidad de información hereditaria que forma parte del ADN.2​

En los seres pluricelulares, las mutaciones solo pueden ser heredadas cuando afectan a las células reproductivas.3​ Una consecuencia de las mutaciones puede ser, por ejemplo, una enfermedad genética. Sin embargo, aunque a corto plazo pueden parecer perjudiciales, las mutaciones son esenciales para nuestra existencia a largo plazo. Sin mutación no habría cambio, y sin cambio la vida no podría evolucionar.

Explanation:

which components of dna determine the genetic code?

Answers

Answer:

Explanation:

Genetic code. Genetic code, the sequence of nucleotides in deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) that determines the amino acid sequence of proteins. Though the linear sequence of nucleotides in DNA contains the information for protein sequences, proteins are not made directly from DNA.

Is it recommended for most adults that carbohydrates make up 45-65% of their diet, proteins make up 10-35% of their diet, and fats make up 20-30% of their diet. Does Deb’s diet mee these recommendations? Support your statement with calculations

Answers

Answer:No her diet does not. She is currently eating 128.52 calories each for protein, 289.17 calories from fat, and 1413.44 calories from carbs. This means she is consuming 6.6% of her diet from protein, 14.9%, of her diet from fat, and 73.2% of her diet from carbs.

Explanation:

List the different forms of potential and kinetic
energy.

Answers

Answer:

answer is below :)

Explanation:

types of potential energy:              

-Gravitational potential energy.

-Elastic potential energy.

-Nuclear energy.

-Chemical energy.

- electric potential energy

types of kinetic energy:

-Flying Airplane.

-Walking & Running.

-Cycling.

-Rollercoasters.

-Cricket Ball.

-Skateboarding.

Once arriving at the ribosome, which process will begin next?

Answers

Answer:

Translation of genetic code for protein formation

Explanation:

Answer: Translation

Explanation: trust me I got it correct

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