Answer:
Plant cells have a cell membrane and a cell wall Animal cells only have a cell membrane.
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Answer:
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Gayla measured the temperature of two identical cups of water over three hours. One cup was kept in a dark cupboard. The other cup was kept under a lamp. Her data is shown in the table below.
Temperature of Water Over Time
Time
Passed Temperature of Water
In the Dark Under a Lamp
start 25°C 25°C
one hour 25°C 35°C
two hours 25°C 45°C
three hours 25°C 55°C
A good scientific explanation uses both the data and an interpretation of the data.
Which of the following is the best explanation for the results of this experiment?
A.
The light shining on the water was changed into heat energy, which increased the temperature of the water.
B.
The temperature of the water under the lamp increased, but the temperature of the water in the dark did not.
C.
The light energy turned into sound energy, which raised the temperature of the water.
D.
The temperature of the water increased because the air conditioner in the room was off.
Answer:
A: The light shining on the water was changed into heat energy, which increased the temperature of the water.
Explanation:
__________________________________________________
The best explanation for the results of Gayla's experiment is that the light shining on the water was changed into heat energy which increased the temperature of the water.
This explanation is not only based on the fact that the temperature of the water under the lamp increased and the temperature of the water in the dark did not, but it also explains how the light energy that came from the lamp changed into heat energy and warmed the water.
How do clams oysters and snails protect themselves?
Organisms like clam, oysters and snails are all species of the phylum Mollusca who protect themselves from their enemies by hiding inside their shells.
Mollusca is the second largest phylum of the Animal kingdom that possess all invertebrate organisms. These are all aquatic organisms hat may be marine or freshwater resident. All the organisms of the phylum possess a solid shell that protects them.
Shells of the species of phylum Mollusca is a hard calcareous structure found on the external portion of the body. The main chemical component of the shell is calcium carbonate. Some animals have shell only on the upper side of the body while some have shells on both sides and are called bivalves.
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Which of the following sugars would NOT yield a positive Fehling's test (red color change)? a. lactose b. sucrose c. maltose d. All of the listed responses would yield a positive result.
Sucrose will not yield a positive Fehling's test
A reducing sugar, or a sugar that can reduce copper ions, is detected using the ideal Fehling's test. Fehling's solution, which consists of copper(II) sulphate and a strong base, is mixed with a sugar solution to be tested, and the mixture is then heated.
During this process, the copper ions will be reduced to copper(I) oxide if a reducing sugar is available, and this copper(I) oxide will then react with the strong base to generate a precipitate of copper(I) hydroxide, which will change its color to red. A positive Fehling test result would be produced by reducing sugars like lactose, maltose, and other disaccharides, but not by non-reducing carbohydrates like sucrose.
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Consider examples c and d in model 2. How are the probabilities from example a and b used to calculate the probability of pulling one tile each from two bags
Probability of pulling one tile each from the two bags in example A and B are 2/5 and 3/5.
Considering example A, the bag has two red tiles and 3 blue tiles. Therefore, there are 5 tiles in total. Thus, probability of pulling a red tile is 2/5 and that of pulling a blue tile is 3/5. This can b illustrated from the following formula to find the probability:
Probability of finding a possibility= No. of a particular possibility/ Total number of possibilities
Example C and D will also have the same probabilities: 2/5 and 3/5 for red and blue tiles respectively. The area of mathematics known as probability deals with numerical representations of the likelihood that an event will occur or that a statement is true. An event's probability is a number between 0 and 1, where, roughly speaking, 0 denotes the event's impossibility and 1 denotes certainty.
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what enzyme can proof-read the dna molecule, minimizing the mistakes made during the process of dna replication?
DNA polymerase enzyme proofreads the DNA molecule to minimize errors during DNA replication.
DNA polymerase enzymes are the enzyme that carries out DNA replication. During this mechanism, a wide range of errors can occur. DNA polymerase read the nucleotide in the template strand and pairs it with the complimentary nucleotide, that is adenine to thymine and guanine to cytosine. But errors occur all the time during this pairing.
But DNA polymerase also carries out proofreading along with the formation of the strand. When an incorrect nucleotide is paired, the whole mechanism is arrested. DNA polymerase identifies the errors by detecting the variation in the 3' OH group. The strand formation is stopped, and the incorrect nucleotide is replaced by the correct one, only after that the process continues.
The errors during DNA replication are rectified either by Base excision repair or Nucleotide excision repair. These are carried out by DNA polymerase as well as DNA ligase enzymes
DNA replication and proofreading are undertaken by the same enzyme, DNA polymerase.
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A scientist is investigating the possibility that two traits in a particular plant are determined by genes that are on the same chromosome. The scientist crossed a plant that is homozygous dominant for both traits with a plant that is homozygous recessive for both traits. The heterozygous offspring in the Fl generation were then crossed with a plant that is homozygous recessive for both traits. The results expected if the genes independently assort and the observed results are presented in the table. Phenotype Expected Number in F2 Observed Number in F2 25 17 Long stems, white flowers Short stems, red flowers 25 19 Long stems, red flowers 25 31 25 33 Short stems, white flowers Total number of plants 100 100 Which of the following critical values should the scientist use for the chi-square analysis of the data? a. 3.00 b. 3.84 c. 7.81 d. 8.00
The critical value the scientist should use for the chi-square analysis of the data is b. 3.84.
THE CHI-SQUARE ANALYSIS OF THE DATAThe chi-square test is a statistical test used to determine whether there is a significant difference between the observed and expected frequencies in a contingency table. In this case, the scientist is investigating whether two traits in a plant, long stems and white flowers, are determined by genes that are on the same chromosome. The scientist has conducted a genetic cross between plants that are homozygous dominant and homozygous recessive for both traits, and has obtained a sample of 100 plants in the F2 generation. The scientist has then tabulated the observed and expected frequencies of the four possible phenotypes (long stems, white flowers; short stems, red flowers; long stems, red flowers; short stems, white flowers) in the F2 generation.
The chi-square test is used to determine whether there is a significant difference between the observed and expected frequencies in the table. The calculated chi-square value is compared to a critical value from a chi-square distribution table with 3 degrees of freedom and a significance level of 0.05. The degrees of freedom for a chi-square test are equal to the number of categories in the table minus 1. In this case, there are 4 categories (phenotypes) in the table, so the degrees of freedom are 3.
The critical value for this test is 3.84. If the calculated chi-square value is less than 3.84, the scientist would conclude that there is no significant difference between the observed and expected frequencies and thus the genes independently assort, meaning that the genes are located on different chromosomes. On the other hand, if the calculated chi-square value is greater than 3.84, the scientist would conclude that there is a significant difference between the observed and expected frequencies and thus the genes are located on the same chromosome.
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Sewage that end up in waterway can increae algae growth becaue it
A. Kill plant
B. Provide nutrient
C. Ue oxygen
D. Attract bird
Sewage that ends up in waterway can increase algae growth because it B. Provides nutrients.
Algae growth in waterbodies is aided by the nutrients phosphorus and nitrogen, which are necessary for algae production.
Eutrophication is the process that leads to harmful algal blooms, dead zones, and fish kills. Eutrophication begins with an increase in the amount of nutrients that reach estuaries and coastal waters. An overabundance of algae and plants initiates a chain reaction in the ecosystem as a result of eutrophication. The excessive plant and algae matter eventually breaks down, releasing a lot of carbon dioxide.
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T or F The study of orthologs would be useful to determine the function of a specific gene in a species.
Answer:
True
explaination non
How do wetlands get water?
The primary source of water for wetlands is from precipitation, such as rain.
This water of precipitation is absorbed by the soil and saturates the ground, eventually making its way into the wetland.
Other sources include groundwater, water runoff from rivers, streams, and lakes, and even direct connections to larger bodies of water. In some cases, wetlands are purposefully flooded to create a habitat.
The water level in a wetland is regulated by a variety of factors, including the size of the wetland, the amount of water that flows in, the amount of water that evaporates, and the amount of water that is absorbed by plants.
In addition, wetlands can be impacted by human activities, such as dam and reservoir construction and over-irrigation, which can lead to an increase or decrease in the water level.
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What will happen in the future if we keep on using our non-renewable resources?
The most well-known impact of using non-renewable energy sources is the emission of greenhouse gases such as carbondioxide gas etc.
What will happen if we continue to use non-renewable resources?We pursue to use of non-renewable resources, in specific, carbon dioxide and methane give to climate change. Different types of non-renewable energy fuels emit high levels of greenhouse gases.
Minerals is used for making metals which are also non-renewable natural resources. Nonrenewable natural resources take extended than a person's lifespan to be returned. In fact, Non-renewable energy can take millions of years to form. Fossil fuels such as oil, coal, and gas will not last forever.
So we can conclude that The problem with non-renewable energies is the ecological impact of non-renewable energies · The fuel of climate change.
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Why did the husband become terrified in the world on turtle's back?
In the beginning of "The World on Turtle's Back," we can see that a character named just as "husband" is terrified of being punished for having destroyed the sacred tree that lit up the world where he lived.
"The World on Turtle's Back," is a myth created by the Iroquois to explain the origin of the earth and living things. In this myth, we can see:
There was a realm above the heavens that was created even before the earth was created.
This realm was inhabited by magical beings who did not die, grow old, or get sick. They were called the people of heaven.
There was a tree in the center of that realm that was holy.
The tree lit up the entire kingdom, since the sun did not exist.
One day, one of the women of the heavenly realm discovered that she was pregnant with twins. She is very happy and tells her husband, but he is furious with the news, to the point of pulling the sacred tree from the ground. This causes a hole and he throws his pregnant wife into that hole.
The man is terrified, not because he threw his wife to an unknown end, but because he destroyed the sacred tree and is afraid of being punished.
Despite the fall, the woman survives and gives birth to the twins who will create all the elements of planet earth.
With this, we can conclude that the Iroquois also created myths to explain things they did not know, such as the origin of the planet and human beings.
Your question is incomplete most probably your full question was
In the beginning of "The World on Turtle's Back," why did the husband become "terrified"? He was terrified the he might never see his wife again. He was terrified that his wife might fall through the hole in the sky. He was terrified that he would be punished for marring a sacred tree. He was terrified that the Great Tree would fall into the ocean.
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A DNA polynucleotide is composed of a chain ot DNA nucleotides. Which component of a nucleotide can be removed without breaking the chain
DNA polynucleotides are composed of a chain of DNA nucleotides, which are made up of three components: a phosphate group, a deoxyribose sugar group, and a nitrogenous base. The nitrogenous base is the component that can be removed without breaking the chain.
The nitrogenous base can be one of four different molecules: adenine (A), thymine (T), guanine (G), or cytosine (C). These molecules are the “letters” of the DNA alphabet, and they are the parts that determine the genetic code. When a nitrogenous base is removed, the phosphate group and deoxyribose sugar group remain linked, and the DNA molecule remains intact.
However, the genetic code of the DNA is disrupted because the sequence of nitrogenous bases is what determines the code. Therefore, removing a nitrogenous base from a DNA polynucleotide without breaking the chain does not necessarily mean that a functioning gene will be left behind.
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What is the best way to ensure proper protein levels?
To ensure proper protein level one should include various sources of protein that can include lean meat , eggs , diary products ,protein shakes and legumes .
Protein is one of the most essential nutrients for daily life , as they are required to help your body repair cells and make new ones. Protein also plays crucial role in growth and development in children and expecting mothers .
In general , proteins are required for the repairing and building your body's tissues, They also allows metabolic reactions to occurs at place for easy body function . so we can say that protein is crucial for maintaining structural framework of body and also helps in maintaining fluid balance .
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Question 1 of 30
How do scientists collect data?
A. Through careful observation and measurement
B. Through interpretation of the conclusions
C. Through educated guesses
F
D. Through analysis of the results
Answer:
A.
Through careful observation and measurement
Why did Mendel choose pea plants 3 reasons )? How did these characteristics help make it easier for Mendel to figure out the patterns to heredity?
Mendel chose garden pea for his experiment because are bise-xual, self pollinating they have a shorter life span, and also have visible physical characteristics which made it easier to study them.
Mendel conducted a lot of experiments on plant breeding and gave the laws of inheritance. He selected garden pea for his experiments for three reasons which made it easier for him to figure out the patterns for heredity. The first reason is that the garden peas have a short life span due to which they are able to grow quickly and are therefore are easy to maintain.
The second reason is that the garden peas have bise-xual flowers and due to this reason they have the ability to self-pollinate. The third reason is that these plants have visible phenotypic characters which makes them easy to study.
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7
How do carbon dioxide and oxygen move into and out of a mesophyll cell?
A active transport
B
diffusion
osmosis
D transpiration
Answer:
Diffusion
Explanation:
Diffusion is the net movement of particles
Which of the following statements best explains why evolution by natural selection is considered a theory and not a hypothesis?
A. Evolution is an educated guess as to how species have changed over time.
B. Evolution is often refuted by other scientists, which is why it is only a theory.
C. Evolution is supported by a wide range of evidence from different fields of science.
D. Evolution started as a law, but after fossil evidence was discovered, it became a theory.
Answer:is that the full question
Explanation:
PBS Evolution: Great Transformations
1. If the world’s history were compressed into one hour, how long have humans been here?
Microbes. Single-celled organisms
2. How long ago did mammals first appear on earth?
Mammals first appeared about 200 million years ago
3. What type of animal did the skull that Dr. Gingrich discovered resemble?
Dr. Gingrich discovered resembled a whale
4. What did "Whale Valley" used to be?
5. What unusual feature did they find at the end of the early tetrapods’ limbs?
6. How long ago did animals first appear on Earth?
About 800 million years.
7. When the mouse "eyeless" gene was implanted into the fruit flies, what happened?
8. How would walking on two legs be an advantage?
Humans have undergone evolutionary transitions, as mammals like whale resembled other mammals in terms of skulls and other sculptures on the basis of the fossils found.
The program begins with one of the most popular examples of a purported change used by the evolution contingency: the transition from land animals to the whale. This shift is demonstrated to be explained by the fossils of Pakicetus, Ambulocetus, Rhodocetus, Dorontid, and Basilosaurus. In contrast to a complete transitional fossil, Pakicetus only has a small piece of its cranium to show for itself. Although Ambulocetus is depicted in the documentary as a fully preserved fossil of an aquatic mammal with legs, this is an embellishment and stretching of the truth given that the skeleton of the animal was actually found to be very fractured. In the series, Rhodocetus is only depicted by a skull.
Many people have asserted that those "legs" weren't just vestigial; they also participated in copulation. They might have even had a swimming feature. In conclusion, two skulls, one incomplete, maybe transitional skeleton, and a complete aquatic whale type with short hind legs. Our top example of an apparent evolutionary transition comes from these data.
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NO LINKS PLEASE
Which of the following was NOT a discovery that William Harvey made about the body's circulatory system?
O A. Blood flows in a circle through the body.
O B. Blood flows through pores in the tissues.
O C. The heart has one way valves to direct blood flow.
OD. Blood leaves the heart through arteries and returns through veins.
Answer:
blood flows through pores in the tissues
What two “parts” does a cell build ATP from?
Answer:
Explanation:
. The two ATP-producing processes can be viewed as glycolysis (the anaerobic part) followed by aerobic respiration
I hope you guys are having a wonderful day but can you guys help? :/
Answer:
I know I am sure am going to have a wonderful day
Can cyanide cause permanent damage?
Answer:
it can cause damage to the Brian and heart.
Explanation:
Please answer I really need help
Answer:
The answers to the blank spaces are numbered as follows:
1. Function
2. Nucleus
3. Mitochondria
4. ATP
5. Chloroplast
6. Glucose
7. Ribosomes
Explanation:
This question is describing the organelles found in a cell. An organelle is a structure that performs a specific FUNCTION (1) in a cell. There are different kinds of organelles with each possessing its own peculiar function. Some of them are as follows:
- NUCLEUS, which is regarded as the brain of a cell because it directs or controls a cell's activities just like the brain of an organism does.
- MITOCHONDRIA is an organelle that produces the energy storing compound called ATP (adenosine triphosphate), hence, it is called power house of the cell.
- CHLOROPLAST is an organelle found in plant cells that functions in the conversion of light energy (from sun) into GLUCOSE (chemical energy) in a process called PHOTOSYNTHESIS.
- RIBOSOMES is an organelle found in both prokaryotic and eukaryotic cells that serves as the site of PROTEIN production in a cell.
Will MARK AS BRAILY SMART THING BUT PLEASE HELP!!!!!!!
3. Write the number of the correct definition in front of each ecological terms:
1. All of the non-living components of an ecosystem.
2. A consumer that eats only plants.
3. A consumer that does not hunt and eats the flesh of dead animals.
4. The environment where plants, animals and micro-organisms live together and interact
with the non-living parts of their environment.
5. Organisms that break down dead plants and animals as their source of energy.
6. All the living components of an ecosystem.
Ecosystem
Biotic Components
Carnivore
Producer
Omnivore
Decomposer
The number of each ecological term's right definition is as follows: Ecosystem (4, Biotic Components (6), Decomposer (5). These are the terms that are defined in the query.
What instances of omnivores are there?Omnivores are several types of animals that consume both plants and other animals. They regularly eat a variety of substances, including plants, animals, algae, and fungi. They have the animal kingdom's most adaptable diet. Humans and crows are two examples of omnivorous creatures.
Which animal doesn't consume corpses?Eagle, owl, and kingfishers hunt for their prey rather than eating dead animals. As scavengers, crows, vultures, and kites consume dead animals. Animals known as scavengers eat rotting and dead vegetation and animals.
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What are 5 examples of behavioral adaptations in animals?
Explanation:
1.Hibernation by bears
2.migration by birds
3.alteration in reproduction mode
4.altered feeding habits
5.distinct modes of communication.
the graph shows the motion of an object in both the x and y directions. Classify the motion of this object.
Answer:
where is the graph?
Explanation:
If the diplold (2n) number of chromosomes for this cell is four and the haploid
(n) number is two, are the daughter cells now diplold or haplold?
Following telophase I there is a short interphase; however, there is not any DNA synthesis co
chromosomes do not duplicate. Actually they don't need to since the chromosomes are still
duplicated.
Does your model agree with this statement?,
Both daughter cells now go through a second series of divisions (melosis II) as follows:
If the diplold (2n) number of chromosomes for this cell is four and the haploid number is two, are the daughter cells now diplold or haploidas it following telophase I there is a short interphase; however, there is not any DNA synthesis.
What happens in telophase II?After telophase II, each chromosome in the haploid organism has been made up of one daughter chromosome. Meiosis has the type of cell division that will results in the halves of the number of the chromosomes in the daughter cells.
Four daughter cells with each of which has half its parent cell's chromosomes, are created during the meiosis. Meiosis I and II, the first and second division has steps of the meiotic process, each involve four stages: prophase, metaphase, anaphase, and telophase.
Therefore, If the diplold (2n) number of chromosomes for this cell is four and the haploid number is two, are the daughter cells now diplold or haploidas it following telophase I there is a short interphase; however, there is not any DNA synthesis.
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Replicated chromosomes divide twice during the meiotic process to create four haploid cells, commonly known as meiocytes (sperms and eggs).
What is Meiosis?Meiosis is the process by which diploid (2n) organisms create meiocytes, which have half the ploidy of the parents and are used for sexual reproduction.
For the zygote's genetic makeup to match that of its parents, meiocyte ploidy must be cut in half. The separation and redistribution of chromosomes are accomplished during meiosis using methods similar to those used during mitosis.
Meiosis is the only process in which homologous chromosomes join up and undergo genetic recombination. Centrioles and chromosomes are replicated in the steps before meiosis, which are similar to those of mitosis.
Therefore, Replicated chromosomes divide twice during the meiotic process to create four haploid cells, commonly known as meiocytes (sperms and eggs).
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Which gender (male or female) is most likely to have X linked traits? _____
(Pls explain also)