The fern life cycle exhibits an alternation of generations with the being dominant and the being reduced and fully independent. The fern is a plant (containing xylem and phloem) and the sporophyte exhibits true roots, stems and . The roots extend from a or root stalk (depending on the species) and serve for anchorage and absorption of nutrients. The frond is supported by a central axis (also known as the ) which contains strengthening and vascular tissue. The frond is subdivided into which contain chlorophyll for photosynthesis. The under surface of the leaflets may have which are reproductive structures that contain sporangia. Each sporangium contains numerous haploid that are derived through the process of When spores reach maturity, the sori rupture, releasing the meiospores which are dispersed by
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The fern life cycle demonstrates a dominant sporophyte phase and a reduced, independent gametophyte phase, characterized by true roots, stems, and leaves, as well as reproductive structures called sori.
The fern life cycle exhibits an alternation of generations with the sporophyte being dominant and the gametophyte being reduced and fully independent. The fern is a plant (containing xylem and phloem) and the sporophyte exhibits true roots, stems, and leaves.
The roots extend from a rhizome or root stalk (depending on the species) and serve for anchorage and absorption of nutrients. The front is supported by a central axis (also known as the rachis) which contains strengthening and vascular tissue. The frond is subdivided into leaflets which contain chlorophyll for photosynthesis.
The undersurface of the leaflets may have sori which are reproductive structures that contain sporangia. Each sporangium contains numerous haploid spores that are derived through the process of meiosis. When spores reach maturity, the sori rupture, releasing the meiospores which are dispersed by wind.
The above information is appropriate for the following question which states that the fern life cycle exhibits an alternation of generations with the sporophyte being dominant and the gametophyte being reduced and fully independent.
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Related Questions
Food Allergies ___________.
A. only impact Highly Susceptible Populations.
B. are very uncommon.
C. are serious and can be fatal.
D. are a cause of foodborne illness.
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C. are serious and can be fatal.hope it helps
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presence of cholesterol in the channel. presence of carbohydrates in the channel. hydrophobicity of the channel. phospholipid composition of the channel. differential interaction with the selectivity filter protein.
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Factors such as cholesterol and carbohydrate presence, hydrophobicity, phospholipid composition, and differential interaction with the selectivity filter protein all contribute to the function and selectivity of a membrane channel.
1. Presence of cholesterol in the channel: Cholesterol affects membrane fluidity and stability, which can influence the function and selectivity of channels.
2. Presence of carbohydrates in the channel: Carbohydrates may play a role in cell recognition and signaling, potentially affecting channel function.
3. Hydrophobicity of the channel: The hydrophobicity of the channel allows it to interact with the lipid bilayer, thus playing a crucial role in its insertion and function within the membrane.
4. Phospholipid composition of the channel: The specific phospholipids present in the channel can affect its overall function and interactions with other molecules.
5. Differential interaction with the selectivity filter protein: The selectivity filter protein may interact differently with various ions or molecules, thus determining the channel's selectivity and function.
In summary, factors such as cholesterol and carbohydrate presence, hydrophobicity, phospholipid composition, and differential interaction with the selectivity filter protein all contribute to the function and selectivity of a membrane channel.
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Describe one limitation of watson and cricks dna model
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The bases, bound by magnesium or calcium ions, were placed wrongly inside the DNA molecule by Watson and Crick's model, whereas the phosphates were placed outside.
The use of empirical data is a major defining feature of science.The model's flaw is that it only depicts whole nucleotides as single rectangular boxes, ignoring the reality that nucleotides also include a nitrogenous base, a sugar, and a phosphate.
According to Watson and Crick's idea, the two DNA strands of the double helix are held together by hydrogen bonds formed between nitrogenous bases on opposing DNA strands.
Each pair of bases, which are parallel to one another, creates a flat "rung" on the ladder-like structure of the DNA molecule. Base pairings don't include
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which body part from other systems does not interact directly with breathing?
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Answer:
The process of physiological respiration includes two major parts: external respiration and internal respiration. External respiration, also known as breathing, involves both bringing air into the lungs (inhalation) and releasing air to the atmosphere (exhalation). During internal respiration, oxygen and carbon dioxide are exchanged between the cells and blood vessels.
Respiration begins at the nose or mouth, where oxygenated air is brought in before moving down the pharynx, larynx, and the trachea. The trachea branches into two bronchi, each leading into a lung. Each bronchus divides into smaller bronchi, and again into even smaller tubes called bronchioles. At the end of the bronchioles are air sacs called alveoli, and this is where gas exchange occurs.
Diagram labeling the major structures of the respiratory system
Diagram labeling the major structures of the respiratory system
Image credit: Arteries and veins of the body by OpenStax, CC BY 4.0
An important structure of respiration is the diaphragm. When the diaphragm contracts, it flattens and the lungs expand, drawing air into the lungs. When it relaxes, air flows out, allowing the lungs to deflate.
Common mistakes and misconceptions
Physiological respiration and cellular respiration are not the same. People sometimes use the word "respiration" to refer to the process of cellular respiration, which is a cellular process in which carbohydrates are converted into energy. The two are related processes, but they are not the same.
We do not breathe in only oxygen or breathe out only carbon dioxide. Often the terms "oxygen" and "air" are used interchangeably. It is true that the air we breathe in has more oxygen than the air we breathe out, and the air we breathe out has more carbon dioxide than the air that we breathe in. However, oxygen is just one of the gases found in the air we breathe. (In fact, the air has more nitrogen than oxygen!)
The respiratory system does not work alone in transporting oxygen through the body. The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
Studying for a test?
Explanation:
What role does fossil fuels play in the carbon cycle? *
They are a sink of carbon. The carbon in fossil fuels hasn't been in the carbon cycle in
millions of years.
They absorb carbon dioxide from the atmosphere with their buffering ability
The fossil fuels are getting more acidic because they are absorbing too much carbon
dioxide
Fossil fuels are not involved in the carbon cycle. They are involved in nutrient cycling.
Answers
Answer:
A
Explanation:
Carbon moves from fossil fuels to the atmosphere when fuels are burned. When humans burn fossil fuels to power factories, power plants, cars and trucks, most of the carbon quickly enters the atmosphere as carbon dioxide gas. Each year, five and a half billion tons of carbon is released by burning fossil fuels.
the list contains the broad stages of translation. choose the correct order in which these stages happen.
I. Amino acid are joined to the growing polypeptide chain
II. Anime acid are bound to the tRNAs
III. Components necessary for the translation are assembled at the ribosome
IV. Protein synthesis halts at termination codon, and translation components are realesed from the ribosome
a. I, II, III, IV
b. II, IV, I, III
c. III, I, IV, II
d. II, III, I, IV
Answers
The correct order of the broad stages of translation is option d. II, III, I, IV. This means that the stages occur in the following order:
II. Amino acids are bound to the tRNAs
III. Components necessary for the translation are assembled at the ribosome
I. Amino acids are joined to the growing polypeptide chain
IV. Protein synthesis halts at termination codon, and translation components are released from the ribosome
In the first stage, amino acids are bound to the tRNAs, which are the molecules that bring the amino acids to the ribosome. In the second stage, the components necessary for the translation, including the mRNA, tRNAs, and ribosome, are assembled at the ribosome. In the third stage, the amino acids are joined to the growing polypeptide chain, forming the protein. In the final stage, protein synthesis halts at the termination codon, and the translation components are released from the ribosome.
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differences between a rhizome and root tuber
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Answer:
Root tubers can grow in any direction.
Rhizomes grow horizontally under the ground.
biological term for control of the body temperature
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How might an environment different from the one you experienced have affected the development of personality characteristics that you believe you inherited from one or both of your parents?
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Answer:
The environment has a great impact on our behavior and personality traits which were believed to be inherited from the parents.
Explanation:
Each of the parents contributes 50% of the offspring DNA, and your inherited genetic makeup may have an impact on your personality. It is frequently asserted that our environment has a greater influence on our personality than our genetics. The adaptability of our capacities, cognitive abilities, and social interests accounts for a large part of our personality. Only via our interactions with our surroundings can we gain the flexibility that forms us.
Yes, our genes are passed down to us, yet it has been proposed that they have no bearing on our behavior.
As a result, a kid is born into a situation that prompts them to react as specified in birth order stereotypes, and therefore our personality has been shaped by our surroundings. However, there is little scientific evidence to back up this theory, therefore it's possible that personality is determined by genetics.
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PLS HELP ITS EARTH SCIENCE>3
Landforms can be shaped by different types of weathering. Which of the following occurred because of chemical weathering?
A. Underground rocks react with acidic groundwater and slowly dissolve, forming a cave.
B. a large section of rock is formed into an arch.
C. The rocks found near a river are rounded.
D. Small cracks in a rock get larger during winter.
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Landforms can be shaped by different types of weathering what will occurred because of chemical weathering is that A. Underground rocks react with acidic groundwater and slowly dissolve, forming a cave.
What kind of weathering create landform ?Another geological process that produces landforms is erosion. Erosion can transfer materials to new sites when mechanical and chemical weathering disassembles materials on the Earth's surface. For instance, by removing material, wind, water, or ice can create a valley. This method can also create plateaus.
Therefore, option A is correct.
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When an experiment is repeated and the new results are different from the original results what may likely be inferred?
A)
Additional test/trials are needed.
B)
Both results are wrong due to the discrepancy.
C)
The hypothesis is incorrect and must be modified.
D)
The first must be inaccurate because you are sure the second results
are correct.
Answers
Answer:
A
Explanation:
You have to repeat it to see which result you see more of, because that would most likely be the correct solution.
Answer:
a
Explanation:
just did it
Create Your Own Pedigree:
Albert and Betty are married. They both have normal vision. They had 2 daughters and then a son.
Both daughters, Cassie & Debra, had normal vision and never had any children of their own. Their son,
Elliot, was colorblind. Elliot married Fallon who also had normal vision and they had 2 of their own children,
George and then Hailey. Hailey was colorblind but George was not.
Colorblindness is sex-linked recessive (X³). Use the letters X, Y or X² for the genotype. Draw the
pedigree below placing the genotypes for Albert, Betty, Elliott, Fallon and Hailey in their respective shapes.
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The muscular system is responsible for body movements, support, and production of body heat.
O True
O False
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Answer:
That is true it is responsible for the body movement
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in some human populations, the proportion of individuals who are heterozygous for the sickle cell allele is much higher than would be expected by chance alone. why?
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Individuals who are heterozygous have an advantage over those who have two normal populations. In various human groups, the percentage of people with a mutation.
heterozygous have some malaria-causing parasite resistance. heterozygous ' mutant hemoglobin interferes with the life cycle of the malarial populations. As a result, heterozygous are more resilient to malaria's crippling effects than typical homozygotes. As a result, heterozygous are more resilient to malaria's crippling effects than typical homozygotes. The significant reproductive disadvantage of populations the more uncommon sickle-cell homozygotes is outweighed by this heterozygous advantage in many sickle-cell carriers.
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*AQUATICS SCIENCE*
Q: Which image shows the most likely path of a barrel floating down a meandering river?
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Answer:
C
Explanation:
A meandering stream has a single channel that snakes through its valley, so the distance 'as the stream flows' is greater than the distance 'as the crow flies.'
Image C is the most likely path of a barrel floating down a meandering river.
What is the meandering of a river?A meandering stream has a single channel that snakes through its valley, so the distance 'as the stream flows' is greater than the distance 'as the crow flies.' The outer edge of the water moves faster than the inner as it flows around these curves.Meanders form as a result of both deposition and erosion, and they gradually migrate downstream. Because of the decreased friction, the force of the water erodes and undercuts the river bank on the outside of the bend, where the water flow has the most energy.To learn more about : Meanders
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is oxygen biotic or abiotic
Answers
Answer:
abiotic
Explanation:
Which mechanism is not an example of a negative feedback mechanism in the human body? Responses contracting muscles contracting muscles regulating blood pressure regulating blood pressure regulating body temperature regulating body temperature maintaining blood sugar level
Answers
Contraction of muscles and regulation of blood pressure, body temperature, and blood sugar levels are examples of negative feedback mechanisms in the human body.
What is negative feedback mechanism ?These mechanisms work to maintain homeostasis by counteracting changes in the body's internal environment and returning it to a set point.
Negative feedback mechanisms involve a feedback loop where a stimulus triggers a response that opposes the original stimulus. This results in a stabilizing effect on the internal environment.
Therefore, all of the options listed are examples of negative feedback mechanisms, and none of them are not an example of negative feedback. All of these mechanisms work to counteract changes in the body's internal environment and maintain homeostasis.
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Tay-Sachs disease is a rare inherited disorder that progressively destroys nerve cells (neurons) in the brain and spinal cord. The most common form of Tay-Sachs disease becomes apparent in infancy. Infants with this disorder typically appear normal until the age of 3 to 6 months, when their development slows and muscles used for movement weaken. Affected infants lose motor skills such as turning over, sitting, and crawling. They also develop an exaggerated startle reaction to loud noises. As the disease progresses, children with Tay-Sachs disease experience seizures, vision and hearing loss, intellectual disability, and paralysis. Children with this severe infantile form of Tay-Sachs disease usually live only into early childhood.
Tay-Sachs disease has been identified in the HEXA gene. One of the known mutations can eliminate the activity of the enzyme, which prevents the enzyme from breaking down a fatty substance. As a result, this substance builds up to toxic levels, particularly in nerve cells in the brain and spinal cord. Progressive damage caused by the buildup of the fatty substance leads to the destruction of these cells, which causes the signs and symptoms of Tay-Sachs disease
Riley was diagnosed with Tay-sachs, which he inherited from both his parents. Riley received a mutated copy of the gene from his mom and a mutated copy from his dad. Neither of his parents has Tay Sachs disease. You must have two copies of the mutated gene in order to develop Tay Sachs disease.
What happened to the HEXA gene of Riley's parents?
What effect did the inherited mutated genes have on Riley at the cellular level?
Is this mutation beneficial, harmful, or neutral to Riley? Defend your answer.
Is this mutation physically beneficial, harmful, or neutral to Riley's parents? Defend your answer.
Does the Tay Sachs mutation increase or decrease genetic diversity? Explain your answer.
Answers
A genetic ailment called Tay-Sachs is passed from one generation of parents to the next.
What is Tay Sachs disease?When a child inherits a defect (mutation) in the HEXA gene from both parents, the condition takes place. The enzyme beta-hexosaminidase A is deficient as a result of the genetic mutation that causes Tay-Sachs disease.
The fatty compound GM2 ganglioside must be broken down in order for this enzyme to function. The brain and spinal cord's nerve cells are harmed by the accumulation of fatty substances.
A rare genetic illness called Tay-Sachs is inherited from one parent to the next. It results from the lack of an enzyme that aids in the breakdown of fatty compounds.
Therefore, A genetic ailment called Tay-Sachs is passed from one generation of parents to the next.
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_________ molecules are soluble in water, however _________ are not soluble in water.
A. glycogen, starch
B. lipids, glycogen
C. starch, glucose
D. glucose, lipids
Answers
Answer:
D. glucose molecules are soluble, while lipids are not.
Explanation:
Glucose molecules are soluble in water, however, lipids are not soluble in water. The correct option is D.
What are glucose and lipids?Glucose is the sweet and simplest carbohydrate. It is the main source of energy in plants and animals. Lipids are the hydrocarbons that build the structure of cells of the body.
Lipids have non-polar ends, and they can not be soluble in water, but glucose is easily soluble in water.
Thus, the correct option is D. glucose, lipids regarding
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Which statement best compares gamma rays to the other components of the
electromagnetic spectrum?
Gamma rays have the lowest frequency and least energy.
Gamma rays have the highest frequency and least energy.
Gamma rays have the lowest frequency and greatest energy.
Gamma rays have the highest frequency and greatest energy.
Answers
Answer: c
Explanation:
proteins that respond to environmental stimuli to prevent the binding of transcription factors are known as
Answers
Proteins that respond to environmental stimuli to prevent the binding of transcription factors are known as repressors.
Repressors are regulatory proteins that bind to specific DNA sequences (typically, operator sequences) and inhibit the transcription of genes by blocking the access of transcription factors to the DNA template. These proteins play a crucial role in gene regulation by controlling the expression of specific genes in response to environmental cues or cellular conditions.
In summary, repressors are proteins that help regulate gene expression by preventing the binding of transcription factors in response to specific environmental stimuli.
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The variable that is measured to obtain the results of an investigation is called a? ANSWER FAST PLEASE
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Hey Adam are we good with you and I hope your?
Answers
Answer: yo whatever you’re going through, just don’t apologize on brainly
Explanation:
What are the large macromolecules made
up of nucleic acids?
Proteins
Lipids
Polysaccharides
DNA and RNA
Answers
Why? - Nucleic acids, macromolecules made out of units called nucleotides, come in two naturally occurring varieties: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
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Although they are all zoonotic diseases, which statement BEST describes the difference between ringworm and others such as plague or SARS?
Ringworm cannot be transmitted to humans, whereas most others can.
Ringworm is not life-threatening, whereas most others are.
Ringworm comes from exposure to rats, whereas plague and SARS come from fleas.
Ringworm is only found in hot, dry climates, whereas plague and SARS flourish anywhere.
I
Answers
The BEST statement describing the difference between ringworm and other zoonotic diseases such as plague or SARS is:
Ringworm is not life-threatening, whereas most others are.
Ringworm is a fungal infection of the skin, hair, or nails that can be transmitted from animals to humans. While it can be uncomfortable and unsightly, it is not generally a serious or life-threatening condition. On the other hand, diseases like plague and SARS are highly contagious and can be deadly if left untreated.
Plague is caused by a bacterium that is typically spread by fleas from infected rodents, while SARS is caused by a virus that can be transmitted from animals to humans, with bats and civet cats being the suspected reservoirs. Both diseases can cause severe respiratory symptoms and can be fatal in some cases.
what is 1000 into brackets 0.0128/200
Answers
Answer:
0.064
Explanation:
Why do most macroinvertebrates need clean water?
Answers
Answer:
They require the cleanest water for survival as well as high levels of dissolved oxygen. In particular, mayflies (Ephemeroptera), stoneflies (Plecoptera) and caddisflies (Trichoptera) are the most sensitive to changes in water quality.
Explanation:
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A weld bead made at a(n) ____________________ amperage setting is wide and flat with deep penetration, produces excessive spatter, and is mostly hard.
Answers
A weld bead made at a high amperage setting is wide and flat with deep penetration, produces excessive spatter, and is mostly hard.
When welding, amperage is a crucial factor in determining the characteristics of the resulting weld bead.
A high amperage setting increases the current flow through the welding electrode, resulting in a more intense and hotter arc.
This in turn leads to a wider and flatter bead with deep penetration into the base materials. However, the downside of using a high amperage setting is that it can cause excessive spatter, which is the molten metal particles that are expelled during welding, and lead to a harder weld bead.
To achieve an optimal weld bead, it is important to use the appropriate amperage setting for the specific welding application. High amperage settings can produce wide and flat beads with deep penetration, but may also result in excessive spatter and harder welds. Adjusting the amperage according to the material thickness and type of weld can help achieve the desired weld bead characteristics.
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A population of wolves is reintroduced into Yellowstone National Park. For the first decade, the wolf population grows exponentially. Then, the population growth slows. The new pattern is known as,.
limiting factors.
logistic growth.
exponential growth.
carrying capacity.
Answers
Answer:
logistic growth.
PLEASE HELP!! 30 POINTS
Why do rotifers reproduce primarily through parthenogenesis?
Male rotifers are overabundant.
Female rotifers are extremely rare.
Female rotifers are unable to reproduce *exually.
Male rotifers are extremely rare.
Answers
Answer:
The overall answer that you want is: Male rotifers are extremely rare.
Reasoning:
"Rotifers are dioecious, which means that they have both male and female organisms. But, in most species, males have not been observed or are very rare."
Your welcome, have a good day!
Rotifers primarily reproduce through parthenogenesis because Male rotifers are extremely rare. Thus, the correct option is D.
What is Parthenogenesis?Parthenogenesis may be defined as a kind of asexual reproduction through which an egg can develop into an embryo without being fertilized by a sperm. This process of reproduction supports the chromosomal theory of inheritance.
Parthenogenesis is significantly considered as the most stable, easy, and simplest process of reproduction.
Most of the species of rotifers consist only of females and due to this females follow the method of parthenogenesis in order to produce their daughter cells without the involvement of a male partner.
Due to the lack of a male population, the females of the rotifers typically follow this method of reproduction in order to give rise to their young ones.
Therefore, Rotifers primarily reproduce through parthenogenesis because Male rotifers are extremely rare. Thus, the correct option is D.
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