Answer:
L-form bacteria are distinct from mycoplasmas, because Mycoplasma spp. do not originate from bacteria that normally possess a cell wall. ... Some of these bacteria remain as CWDB (stable L-forms), whereas others revert back to possession of a cell wall (unstable L-forms).
Explanation:
Most eukaryotic mRNAs are shorter than the genes that encode them. The reason for this is __________.
A. that exons are spliced out of the hnRNA
B. that introns are spliced out of the DNA
C. that eukaryotic genes contain both introns and exons
D. the addition of the poly-A tail to the genomic DNA
Which of the following is table sugar?
glucose
fructose
sucrose
galactose
lactose
Answer:
sucrose & galactose
What information can a pyramid model tell a scientist about an ecosystem? How might such models be used?
Answer:
The structure of ecosystems can be visualized with ecological pyramids, which were first described by the pioneering studies of Charles Elton in the 1920s. Ecological pyramids show the relative amounts of various parameters (such as number of organisms, energy, and biomass) across trophic level
Explanation: hope it helps
Answer:
Explanation:
A pyramid of numbers shows graphically the population, or abundance, in terms of the number of individual organisms involved at each level in a food chain. This shows the number of organisms in each trophic level without any consideration for their individual sizes or biomass. The pyramid is not necessarily upright
walrus often dive for 5 to 8 minutes suggest why having over three times as many red blood cell as humans help them perform this function
Walrus often dive for 5 to 8 minutes because their red blood cells (that carry the oxygen) are exceptionally large. In addition, they have lots of myoglobin in their muscles that can store oxygen.
Why do Walrus have high blood circulation?The walrus can remain under the surface of the water for up to 10 minutes. They will usually surface every 5 to 8 minutes to get air and stay at the surface for about 1 minute. They will stay in the shallow waters, no more than 262 feet below the surface.When they dive the blood flow is cut off from their skin, extremities, and stomach. All of these adaptations allow for efficient and lengthy use of oxygen stores. They have a larger percentage of blood in their bodies to carry oxygen, about 12 percent of their weight as compared to only 7 percent for humans.To learn more about Walrus, refer to:https://brainly.com/question/25164635
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Which step is irrelevant to investigating a foodborne illness outbreak
Which scenario describes a relationship of predator-prey?
Birds feed off the insects that are stirred up from the grasses as cattle move through.
A polar bear catches a seal for dinner.
A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat.
Oxpecker birds eat parasitic ticks off the backs of zebras.
Answer:
A polar bear catches a seal for dinner
Explanation:
Which processes produce the carbon dioxide from the original glucose molecule? Which processes do NOT produce CO2 molecules? (this is abt cell respiration)
The process that is responsible for the production of carbon dioxide from the original glucose molecule is known as Cellular respiration.
What is Cellular respiration?Cellular respiration may be defined as a biological process through which a form of sugar which is known as Glucose is transferred into energy in the form of ATP in the presence of oxygen. This energy is required to accomplish metabolic activities.
The complete reaction of cellular respiration is as follows:
Glucose + Oxygen → Carbon dioxide + Water + Energy (ATP).The process that does not produce carbon dioxide molecules is the oxidation of food during respiration. In other words, it is known as Lactate fermentation. Lactate fermentation initiates with glycolysis and forms lactate.
Therefore, the process that produces carbon dioxide and the process that does not produce carbon dioxide is well described above.
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Which statement describes how organelles aid in transporting proteins in eukaryotic cells?
A. Mitochondria transport ribosomes to the endoplasmic reticulum.
B. Lysosomes attach free-floating amino acids to mRNA molecules.
C. The Golgi apparatus joins free-floating phosphates to ADP molecules.
D. Membrane-enclosed proteins leave the ER and merge with the Golgi apparatus for further processing.
Diagnosis
Your scan of Lucy's ADA gene showed a mutation in the active site. Why was this mutation not a
problem?
Answer:
This mutation in the active site was not a problem because this mutation affects the amino acid or protein in a molecule that that isn't important. So the molecule ended up being in the same state it was in beforehand.
Explanation:
Lucy's ADA gene showed a mutation in the active site, but this mutation was not a problem because the mutation did not change the overall active site, its structure, or function of the protein. After the mutation, the substrate can bind there too.
What effect does the mutation have on the protein?The gene has an encoded, inherited message that must be expressed in the form of proteins or RNA (rRNA), and if the gene is mutated, then there will be certain changes seen in the protein. The change in expression level depends on the intensity of the mutation; some changes are very minute and have negligible impact on the function of the protein, while others have a huge impact.
Here, the ADA gene is mutated, but it has no impact, and this happens either because it is a silent mutation in which the amino acid before and after the mutation is the same or because the substrate binding to the active site is not hampered after the mutation. In either of these cases mutation has no impact.
Hence, no effect is seen due to the lack of change in function of the protein.
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Moles are mammals that live underground and eat worms. The moles are adapted to use their sense of smell to locate their food. Which environmental change would MOST LIKELY allow for an increase in the number of moles born with a better sense of smell?
A.
More rainfall makes the soil harder for digging so the moles need to have a better sense of smell to locate the worms.
B.
Less rainfall causes the worms to come closer to the surface so the moles need to have a better sense of smell to locate the worms.
C.
More rainfall makes the soil easier for digging so the moles need to have a better sense of smell to locate the worms.
D.
Less rainfall causes the worms to burrow further underground so the moles need to have a better sense of smell to locate the worms.
Answer:
I think the answer is D
Explanation:
Because if there is less rainfall that will make it harder for the moles to look for the worms and to sense the worms so they will have to have sense harder or dig harder to get the worms. hope this helps!
Less rainfall causes the worms to come closer to the surface so the moles need to have a better sense of smell to locate the worms.
What are adaptations of moles?Moles are adapted to use their sense of smell to locate their food, which is mainly worms. In dry conditions, worms tend to come closer to the surface in search of moisture and as a result, moles would need to have a better sense of smell to locate the worms.
In this scenario, the moles with better sense of smell would be more successful in finding food and would be more likely to survive and reproduce, passing on their advantageous traits to the next generation. This would lead to an increase in the number of moles born with a better sense of smell.
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The..............is the sense organ most associated with balance.
1)Nose
2)Skin
3)Ear
4)Eye
5)Tongue
Answer and I will give you brainiliest
What is the name of the person who studies everything to know about “witches”?
Select the correct statement(s) about angiosperm seeds. Select all that apply. Select all that apply. The embryo in an angiosperm seed is the offspring of the sporophyte plant. All structures in an angiosperm seed are diploid. An angiosperm seed contains structures contributed by three generations of plants.
Answer:
An angiosperm seed contains structures contributed by three generations of plants.
Explanation:
The spermatophytes, also known as phanerogams, represent a group of seeded plants that have developed special structures for reproduction. This group (spermatophytes) consists of gymnosperms or 'naked seeds', and angiosperms or 'enclosed seeds'. The seed is an organ generated from the ovule after fertilization by the pollen grain, which gives rise to a seedling during the process of germination. In flowering plants, seeds are generated by a process of double fertilization and consist of three tissues: 1-an embryo (generally diploid) formed by repeated mitotic division of the zygote cell, 2- an endosperm tissue (generally triploid, 3n) that nourishes the embryo during its growth, and 3-a seed coat generated from the integuments of the ovule. In angiosperms, seeds consist of three generations: the gametophyte that provides nutrients to the embryo, the embryo, and the seed coat which is generated from the parental tissue (sporophyte).
true or false: the seasons are caused by earths orbit around the sun in combination with the tilt of earths axis
Answer:
True
Explanation:
Depending on the were the Earth is facing depends on the weather and climate.
Which of the following is true regarding the process shown below?
A. This process is cloning and involves the production of RNA from protein molecules.
B. This process is replication and involves the production of DNA from RNA.
C. This process is translation and involves the production of proteins from RNA.
D. This process is transcription and involves the production of proteins from DNA.
Answer:
C. This process is translation and involves the production of proteins from RNA.
Explanation:
- In the process of protein synthesis, the first step is called “transcription”. In transcription, the mRNA (messenger RNA) unwinds DNA base pairs, and pairs it with the single strand of RNA (A,U,C,&G) . Then the mRNA moves out of the nucleus and into the cytoplasm to ribosome. That process is called “translation”. In translation, there is a molecule called tRNA (transfer RNA). There is an amino acid which corresponds to the base pairs of RNA in top, which will create a chain of amino acids.
Answer:
Translation
Explanation:
When did time begin?
Answer:
13.7 billion years ago
Explanation:
Answer:
That was billions of years ago.
If you tossed a coin a total of ten times and got a total of three
heads, what is the probability of tossing heads in your next
toss?
Answer:
The probability of exactly 3 heads in 10 tosses is 1201024.
The probability that result will be head in the next toss is 1/2.
What is Probability?This is a mathematical term which is used to describe how likely an event is to occur or how true a proposition is. In this scenario, we have two variables which are head and tail.
The probability probability of tossing heads in your next toss is therefore
1/2 = 50% chance.
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The smaller the dose required to achieve a drug action the greater the drug potency try or false
Answer:
the answer is true
How are the electrons in the PS II system replaced?
Answer: Photosystem I obtains replacement electrons from the electron transport chain. ATP provides the energy and NADPH provides the hydrogen atoms needed to drive the subsequent photosynthetic dark reaction, or Calvin cycle.
Explanation:
Scientists find that the average time for one complete cell cycle is 22 hours. What differences would they expect to see in cancerous chicken cells?
Answer:
the would have a different visual
Explanation:
Which of these is NOT a job of the root of the plant?
A.
to hold the plant in place
B.
to make food
C.
to take in water and minerals from the soil
Answer:
"The roots of the plant do not make the food. Thus, the answer to this question is letter B. The roots hold the plant in place and through them the minerals and water from the soil. The roots is also involved in the vegetative reproduction and competitions with other plants."
Answer:
B. To make food.
Explanation:
The roots of a plant take water and minerals from the soil but they are not responsible for making the food for the plant. The roots supply what is needed to do so.
Please :( Based on your knowledge of evolution, are humans evolving? Support your answer with factual evidence as to
why or why not
Answer:
Jesus made every one evalution is false
When Charles Darwin introduced the theory of evolution through natural selection 158 years ago, the scientists of the day argued over it fiercely, but the massing evidence from paleontology, genetics, zoology, molecular biology and other fields gradually established evolution's truth beyond reasonable doubt. Today that battle has been won everywhere—except in the public imagination. Embarrassingly, in the 21st century, in the most scientifically advanced nation the world has ever known, creationists can still persuade politicians, judges and ordinary citizens that evolution is a flawed, poorly supported fantasy. They lobby for creationist ideas such as “intelligent design” to be taught as alternatives to evolution in science classrooms. When this article first went to press in 2002, the Ohio Board of Education was debating whether to mandate such a change. Prominent antievolutionists of the day, such as Philip E. Johnson, a law professor at the University of California, Berkeley, and author of Darwin on Trial, admitted that they intended for intelligent-design theory to serve as a “wedge” for reopening science classrooms to discussions of God.
The good news is that in 2005 the landmark legal case Kitzmiller v. Dover in Harrisburg, Pa., set binding precedent that the teaching of intelligent design in U.S. public schools is unconstitutional because the idea is fundamentally religious, not scientific. The bad news is that in response, creationists have reinvented their movement and pressed on. When they lost the ability to claim that creationist ideas are valid science, they switched to arguing that they were only supporting “academic freedom.” Worse, to further obscure the religious roots of their resistance, they now push for “critical analysis” of climate change, cloning research and other scientific endeavors that they paint as culturally oppressive.Explanation:
Petunia flower color is governed by two alleles, but neither allele is truly dominant over the other. Petunias with the genotype R1 R1 are red-flowered, those that are heterozygous (R1 R2 ) are pink, and those with the R2 R2 genotype are white. This is an example of incomplete dominance. (Note that superscripts are used rather than upper- and lowercase letters to describe the alleles).
a. If a white-flowered plant is crossed with a red-flowered plant, what is the genotypic ratio of the F1?b. What is the phenotypic ratio of the F1?c. If two of the F1 offspring were crossed, what phenotypes would appear in the F2?d. What would be the genotypic ratio in the F2 generation?
Answer:
a. 4 R¹R²
b. 4 Pink flowers
c. 1 Red, 2 pink and 1 white phenotypes
d. 1R¹R¹ : 2R¹R² : 1R²R²
Explanation:
This question involves a single gene coding for flower color in petunia plants. However, the allele for red flower color (R¹) is incompletely dominant over the allele for white flower color (R²), hence, a pink intermediate phenotype (R¹R²) is formed.
According to these questions;
A. If a white-flowered plant (R²R²) is crossed with a red-flowered plant (R¹R¹), all of the F1 generation will have a genotype of R¹R² (see attached image for punnet square).
B. The F1 generation, which possess a genotype: R¹R² will express the pink flower phenotype because neither of the two alleles are truly dominant over the other i.e incomplete dominance.
C. If two of the F1 offspring were crossed i.e. R¹R² × R¹R², each parent will produce R¹ and R² gametes. Using these gametes in a punnet square (see attached image), the following phenotypes will be produced in the F2 generation: Red, pink and white phenotypes
D. The F2 generation will possess a genotypic ratio of 1R¹R¹ : 2R¹R² : 1R²R².
How can beavers help dry areas? Fill in the inference in the chart.
Beavers help dry places by making dams. The correct inference is 2. Beavers are mammals and they are rodents.
What are beavers?Beavers are mammals and they are semiaquatic animals. They eat trees and other woody plants, apples, grasses, water lilies, clover, giant ragweed, cattails, and watercress are among the soft plants that beavers eat.
The water will be slowed down and allowed to soak into the earth, allowing beavers to create channels and plant trees. In times of drought, any leaks in beaver dams will gradually discharge water into the river, and ponds and wetlands will gradually release water into streams and rivers until they dry out.
Therefore, the correct inference is 2, beavers can make dry land wet by making dams.
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The sum of all chemical reactions that take place within an organism is
known as:
Answer:
metabolic reactions .
Explanation:
hope this will be helpful to you.
20. Allosteric effectors: a. can cause large changes in enzymatic activity. b. can lead to a decrease in the availability of a protein. c. do not alter the sensitivity of a metabolic pathway. d. decrease the sensitivity of the enzyme at nearly all concentrations of substrate. e. alter enzyme activity by binding to the active site of an enzyme.
Answer:
a. can cause large changes in enzymatic activity.
Explanation:
An enzyme refers to a biological catalyst that is typically used to speed up (accelerate) the rate of a chemical reaction by lowering the activation energy of its reactants.
When the activation energy of a reaction is low, the rate of the reaction would be faster. Therefore, an enzyme speeds or catalyzes the rate of a reaction by lowering its activation energy. Also, if the conditions are not optimal for an enzyme, it limits the ability of an enzyme to bind or be joined with its substrates. An increase in temperature increases or speeds up the rate of a reaction while low temperature limits or reduces the rate of a reaction. The optimal temperature for enzymes in the human body is around 37 degrees celsius.
An allosteric effector can be defined as an agent, organ or molecule that is being binded to an enzyme at a site, thereby causing a reduction (negative effect) or an increase (positive effect) in an enzyme activity.
Hence, an allosteric effector can cause large changes in enzymatic activity because it acts as an intermediary and mediates specific effect in a metabolic pathway.
The number of chromosomes in a sex cell of an organism is its ________chromosome number.
a. one
b. haploid
c. RNA
d. diploid
Answer:
In sexually reproducing organisms, the number of chromosomes in the body (somatic) cells typically is diploid (2n; a pair of each chromosome), twice the haploid (1n) number found in the sex cells, or gametes. The haploid number is produced during meiosis.
Please help me, List the living and non- living things shown in the picture, marking Brainly !
Answer: Living- hair,girl butterfly,cow,bacteria,tree,Jellyfish,seaweed,mouse,
Non-living-Computer,cellphone,robot, car,clouds,wind,fire,fossil,lightning,bread,clock,sand,snowman,sun,jack-o-lantern
Explanation:
How many grams of water are in 8.16 x 1022
molecules?
Which of the following dietary fats is considered to be the least healthy?
Trans unsaturated fat
All dietary fats are unhealthy
Cholesterol
Saturated fat
Fats that increases the bad cholesterol in the body are considered worst. Thus, Trans unsaturated fat is the correct answer.
What are trans fat?Unsaturated fatty acids have the presence of double bonds. This double bond is either 'cis' or 'trans' in origin.
When the unsaturated compounds are linked through trans bond, they form trans fat.
Trans fat are produced through chemical reaction. This reaction is termed as partial hydrogenation.
Trans fats have shown potential damage to the human body in research studies. Trans fat raises the bad cholesterol level (more lipid, less protein) in the body.
This can lead to several heart disease, liver damage or even atherosclerosis. Such diseases can be life threatening.
Trans fat are found mainly in fried and processed food. The junk food also contains high levels of trans fat.
Therefore, consumption of trans fat should be avoided for health safety.
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