What are viroids?
short strands of circular RNA
short strands of circular DNA
long strands of DNA coiled into circles
small circles of proteins
Answers
Related Questions
Maintaining homeostasis keeps the internal environment in the body functioning properly. Many organ systems work together and maintain energy homeostasis. The digestive system is concerned with processing the food that we take in to provide essential nutrients to the rest of the body. Which of these body systems works most directly with the digestive system in the absorption of nutrients?
A) urinary system
B) endocrine system
C) respiratory system
D) cardiovascular system
Answers
Answer:
D
Explanation:
However, the organ systems also work together to help the body maintain homeostasis. For example, the cardiovascular, urinary, and lymphatic systems all help the body control water balance. The cardiovascular and lymphatic systems transport fluids throughout the body and help sense both solute and water levels and regulate pressure.
in diploid life cycles of most animals, the majority of the cycle is spent as what type of cell?
Answers
In diploid life cycles of most animals, the majority of the cycle is spent as a somatic cell.
Somatic cells are non-reproductive cells that make up the majority of an organism's body tissues and organs. They are diploid, meaning they have two sets of chromosomes, one inherited from each parent, and they undergo mitosis to produce identical daughter cells. In contrast, gametes are haploid, meaning they have only one set of chromosomes, and they are produced through meiosis. The diploid phase of the life cycle predominates in animals because it is the period of growth, development, and maintenance of the body's tissues and organs, which is essential for survival and reproduction.
what is tissues?
Tissues are groups of similar cells that perform a specific function within an organism. In multicellular organisms, such as plants and animals, tissues are organized into organs, which in turn work together to carry out specific functions. There are four main types of tissues found in animals: epithelial tissue, connective tissue, muscle tissue, and nervous tissue.
Epithelial tissue covers the surfaces of the body, both inside and outside, and protects against injury, infection, and dehydration. Connective tissue provides support and structure to the body, and includes bones, cartilage, and blood vessels. Muscle tissue is responsible for movement, and includes skeletal, smooth, and cardiac muscle. Nervous tissue is involved in the transmission of signals throughout the body, and includes neurons and supporting cells.
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What is the function of pits in xylem
Answers
Answer: The pit membrane, which lies in the center of each pit, allows water to pass between xylem conduits but limits the spread of embolism and vascular pathogens in the xylem.
Explanation:
Sorry if i'm wrong
if a bacterial isolate shows intermediate to moderate resistance (i.e. dose dependent) to an antibiotic or antimicrobial, how might this drug still be successfully used in the treatment of this microbe?
Answers
The drug can be used in the treatment of this microbe if the dose of the drug is carefully monitored. This is because the resistance to the drug is dose-dependent, meaning that a higher dose of the drug may overcome the resistance of the bacteria.
Ways of drug usage
If a bacterial isolate shows intermediate to moderate resistance (i.e. dose-dependent) to an antibiotic or antimicrobial, the drug might still be successfully used in the treatment of this microbe in the following ways:
1. Modification in dose change in dose can help in the successful use of an antibiotic or antimicrobial, even if the bacterial isolate shows moderate resistance.
2. Combination therapy is another approach to utilizing antimicrobial agents, which can be effective against a bacterial isolate that is resistant to one or more antimicrobial drugs.
3. Local delivery and drug modification: An antimicrobial drug may be delivered directly to the affected site in the human body. In the case of bacterial infections, topical application of the drug to the skin, ear, nose, or throat can be effective.
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What are the possible genotypes of the offspring?
Answers
YY Yy and yy
Answer:
YY Yy and yy
Explanation:
Many types of plants produce fruit which is eaten by animals. The seeds of these plants are typically undigestible. Which of the following is an advantage for plants having undigestible seeds? It allows seeds to reside in the gut until conditions are appropriate for germination. It ensures that flowers of these plants will be pollinated. It allows the seeds to be dispersed into other areas. It provides a source of nutrients for the germinating seed.
Answers
The advantage for plants having undigestible seeds is that it allows seeds to reside in the gut until conditions are appropriate for germination.
Fruits are a source of nutrition for animals that consume them, and they are also a means of seed distribution for plants that produce them. Many types of plants generate fruit that is consumed by animals; nevertheless, the seeds of such plants are usually indigestible. As a result, the seeds can be dispersed into new areas by animals that eat the fruit.
However, having undigestible seeds provides a distinct benefit to plants: it allows seeds to reside in the gut until conditions are appropriate for germination, which aids in seed growth and germination.
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which event is least likely to occur after a gene duplication event? both genes retain their function, but they are expressed in different tissues. one gene retains its function, while the other becomes a pseudogene. both genes retain their function, but they are expressed at different times. both genes become pseudogenes. one gene retains its function, while the other evolves to have a new function
Answers
Gene duplication events often occur as a result of errors during DNA replication or repair, which can create an additional copy of a gene. Alternatively, one copy may evolve to have a new function while the other retains its original function.
After a gene duplication event, the least likely scenario is for both genes to become pseudogenes. Gene duplication events often occur as a result of errors during DNA replication or repair, which can create an additional copy of a gene. In some cases, both copies of the gene may retain their original function and be expressed in different tissues or at different times. Alternatively, one copy may evolve to have a new function while the other retains its original function. While it is possible for one copy to become a pseudogene, it is unlikely that both copies would become non-functional as this would be disadvantageous for the organism. Therefore, the scenario where both genes become pseudogenes is the least likely to occur after a gene duplication event.
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students conducted a controlled experiment to investigate whether sawdust provides enough nutrients to support plant growth. the students separated ten nearly identical sunflower seedlings into two groups. they grew the seedlings in the first group in potting soil and the seedlings in the second group in sawdust composed mostly of cellulose. after twenty days, the students recorded observations about the seedlings
Answers
The observed differences between the groups most likely resulted from differences in the ability of the seedlings to produce glucose monomers.
What are the nutrients required for plant growth?Nutrients are those compounds or substances that provide living organisms with the materials they require for their growth and metabolism.
The main nutrients required for the growth and development of plants include:
carbohydratesproteinslipidsminerals such as carbon, nitrogen, phosphorus, iron, magnesium, oxygen, etc,The nutrients required by plants for their growth are obtained from the soil, the atmosphere, as well as from water.
Plants require these minerals from fertilized soil, else they will have as stunted growth and will not be able to produce their food in the form of glucose monomers.
Saw dust lack these nutrients and plants will not grow well in sawdust.
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Complete question:
Students conducted a controlled experiment to investigate whether sawdust provides enough nutrients to support plant growth. The students separated ten nearly identical sunflower seedlings into two groups. They grew the seedlings in the first group in potting soil and the seedlings in the second group in sawdust composed mostly of cellulose. After twenty days, the students recorded observations about the seedlings in each group. The students’ observations are presented in the table. Treatment Group Mean Seedling Height Observations Seedlings in potting soil 18.5 cm The leaves have a dark green color and are normal in size. Seedlings in sawdust 4.8 cm The leaves have a grayish color and are small in size. The observed differences between the groups most likely resulted from differences in the ability of the seedlings to produce which of the following monomers?
yponatremia is a condition in which the sodium in the blood is too low. Uncontrolled spasms, which are sudden, involuntary contractions of muscles, are among the symptoms of hyponatremia. Why do they occur?
A.
Sodium is needed to generate an action potential.
B.
Sodium makes up most of the myelin sheath.
C.
Sodium is the signaling molecule that transmits impulses across a synapse.
D.
Sodium controls voluntary movement, and potassium controls involuntary movement.
Answers
Answer:
D is the correct answer..
this may help you...PLS HELP!
While five friends were playing video games, they saw a bright flash of lightening and heard a loud crash right outside the house. Being curious, they went to the window to see what had caused the loud noise. They observed a large tree branch that had been struck by lightening and fallen off a nearby tree. This sparked a little debate. Listen in on their conversation.
Alejando: Well, it looks like they tree is dead. It just lost a huge branch in the storm. Trees die when they lose big branches like that.
Quan: Nah. That tree will be fine. The branch will grow back exactly the same as it was before.
Michaela: Yeah. Haven’t you heard of cells? Cells are the basic unit of everything that is living and this tree is made up of many cells. It will be ok.
Alicia: But the tree just lost a huge branch which means it lost a lot of those cells. It can’t survive with all the cells it lost.
George: It did lose a lot of cells, but cells come from other living cells, so tree’s healthy cells should be able to produce more cells.
Which friends explanation do you agree with the most? Explain your answer.
Answers
Answer:Por otro lado, puedes raspar con un cuchillo una rama y observar si se encuentra verde. Si es así, significará que el ejemplar aún está vivo, pero si está marrón será que ha muerto. También es recomendable que muevas las ramas y compruebes su flexibilidad.
Explanation:
Answer:
You can scrape a branch with a knife and see if it is green. If so, it means that the tree is still alive, but if it is brown, it means the tree has died
Explanation:
I don't know if that helps. Hope it does though
What if all the micro organisms go on leave for few days.
Answers
Explanation:
Hey mate here's your answer :-
The entire food webs of these dark, abyssal worlds would collapse. Shallower oceans would fare little better. Corals, which depend on microscopic algae and a surprisingly diverse collection of bacteria, would become weak and vulnerable.Hardwired characteristics of the brain that attempt to keep us in balance by correcting deficiencies are referred to as:
Answers
Hardwired characteristics of the brain that attempt to keep us in balance by correcting deficiencies are referred to as homeostatic mechanisms.
Homeostasis is the body's ability to maintain a stable internal environment despite external changes.
In the context of the brain, homeostatic mechanisms involve various processes that regulate physiological functions and maintain optimal levels of essential substances.
These mechanisms can include feedback loops that detect imbalances and initiate corrective actions.
For example, if there is a deficiency in a particular nutrient or hormone, the brain may activate mechanisms to increase its production, decrease its consumption, or enhance its absorption from the environment.
Homeostatic mechanisms play a crucial role in ensuring the body's overall stability and functioning, helping to maintain proper levels of various substances and promoting overall well-being.
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(edge) Describe connective tissue. What are the functions of this tissue?
Answers
Connective Tissue.- tissue that connects, supports, binds, or separates other tissues or organs, typically having relatively few cells embedded in an amorphous matrix, often with collagen or other fibres, and including cartilaginous, fatty, and elastic tissues
Hope this helps have a good day
the specialized region of the sarcolemma of a muscle fiber at the neuromuscular junction is called the
Answers
The motor end plate is the specialized region of the sarcolemma at the neuromuscular junction, where the communication between a motor neuron and a muscle fiber occurs, ultimately leading to muscle contraction.
The specialized region of the sarcolemma (the cell membrane of a muscle fiber) at the neuromuscular junction is called the motor end plate. The neuromuscular junction is a critical point where a motor neuron communicates with a muscle fiber to initiate muscle contraction.
In this process, the motor neuron releases a neurotransmitter called acetylcholine, which binds to receptors on the motor end plate. This binding triggers an influx of ions, leading to the depolarization of the sarcolemma and the generation of an action potential. The action potential then propagates along the sarcolemma and enters the T-tubules, eventually reaching the sarcoplasmic reticulum. This prompts the release of calcium ions, which bind to proteins called allowing the muscle fiber to contract.
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In a certain city, 23% of the inhabitants were found to be Rh negative, a condition caused by a recessive allele.
a) What is the frequency of the recessive allele?
b) What is the frequency of the dominant allele
C)What percent of this population would you expect to be homozygous positive?
D)What percent would you expect to be heterozygous Rh positive?
Answers
Answer:
xx homogeneous recessive
Which
gas makes
up most of the atmosphere, and is needed to build
proteins and DNA *
1 poi
Carbon
Water
Oxygen
Nitrogen
CO2
O Hydrogen
Answers
Answer:
oxygen makes up most of the gas in the atmosphere
When cerebrum is injured,a person becomes unconscious? Give reason.
Answers
Answer:Cerebrum injury leads to blurry vision and concussion leading to unconscious human being leading to persistent headaches.
Explanation:
Brain injury in general leads to concussion for several minutes and leading to worsening headaches. Skull may become swollen or filled with blood and brain tissue or cerebrospinal fluid. This leads to slow activity. Cerebrum damage can lead to every headache and low cognitive ability eventually.
Which of the following is a form of ethnic segregation that persists in the
United States?
A. Immigrants are required to live together until they have become
naturalized citizens.
B. A federal law requires ethnic groups to live together until they
learn to speak English.
OC. Many American Indians still live on reservations where their tribes
had been relocated by force.
O D. Strong leaders encourage their followers to live together so that
they can control them more easily.
Answers
Answer:
C. Many American Indians still live on reservations where their tribes had been relocated by force.
Explanation:
Given that ethnic segregation has to do with the artificial separation of various people of different socio-cultural backgrounds.
Hence, the ethnic segregation that persists in the United States can be attributed to "Many American Indians still live on reservations where their tribes had been relocated by force."
Answer:
C. Many American Indians still live on reservations where their tribes
had been relocated by force.
Explanation:
The air behind a cold front is cold and dry.
Please select the best answer from the choices provided
OT
OF
Answers
Answer:
True
Explanation:
The air behind a cold front is cold and dry. This is true because the cold front has a cooler mass of air which is usually cold and dry and it replaces at ground level a warmer mass of air.
This cycle continues and results in evaporation and precipitation and helps in balancing the atmosphere.
What is heat? ..........
Answers
Answer:
why type of heat? do you mean like heat from the sun, animal heat (mating), heat from like electronics? lol (ill help i just need to know which type)
Explanation:
How is phosphorus NOT returned to the abiotic portion of the environment?
A. Death and
decomposition
B.animal waste
C. Fertilizer use
D.acid rain
Answers
Answer:
D) acid rain
Explanation:
Phosphorus is not returned to the abiotic portion of the environment through d. acid rain.
Abiotic portion of the environment are the nonliving components such as soil, water, or air.
Phosphorus is an essential element in any ecosystem that supports life and the functioning of the ecosystem. Phosphorus is used and returned into an ecosystem through various means in the phosphorus cycle.
Animals and plants are composed of phosphorus. When they die and decompose, phosphorus is returned to the aortic portion of the environment. Also, it is returned via the waste of animals.
Fertilizers containing phosphorus also add phosphorus back to the abiotic portion of the environment.
Acid rain occurs when Sulphur dioxide and nitrogen oxides mix and interact with oxygen and water in the atmosphere to form acidic compounds released as precipitation to the environment.
Therefore, phosphorus is NOT returned to the abiotic portion of the environment through d. acid rain.
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Explain what methanes attraction must be given that it took years to evaporate
Answers
The liquid methane's phase change could have been brought on by an increase or decrease in energy.
What causes liquid methane to change phase?The liquid methane could have changed phases due to an increase or decrease in energy.
The molecules' kinetic energy and perhaps even their freedom of movement would have grown if the energy had increased. The molecules' kinetic energy and perhaps their freedom of motion would have diminished if the energy level dropped. Since the lake vanished during Titan's summer, when more energy was being transmitted into it than at other times, the lake must have evaporated rather than frozen. molecules of the liquid
Each other was shifted around. The molecules of the lake might now travel independently of one another if it evaporated.
The molecules in the lake would only be able to move in place if it froze. During a phase change, neither the quantity nor the size of molecules changes.
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It's possible that a rise or fall in energy caused the liquid methane to shift phases. The length of time it typically takes for a molecular to be expelled from the environment is known as residence time.
What is the purpose of methane?Unscented, colorless, and combustible, methane is a gas. It is mostly used as fuel to produce heat and light. It is also employed in the production of organic compounds. Methane is frequently found in garbage, marshes, septic tanks, and sewers and can be produced as natural materials decompose.
Is liquid methane explosive in any way?According to thermodynamic, superheated liquids may sustain explosions similar to those found in chemical explosives. At 1 atmosphere, liquid methane was heated to a temperature 50 K well beyond its boiling point.
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2. Which was not true about the first TV?
a. It could only show one color.
c. It did not have sound.
Answers
Which of the following is a community?
A. All of the nonliving things that make the lake inhabitable O
B. All of the fish, bacteria, and mammals that live in a lake
C. All of the living and nonliving things that interact in and around a lake
D. All of the trout that live in a lake
Answers
Answer:
B. All of the fish, bacteria, and mammals that live in a lake
Explanation:
In terms of biology an individual make population, population makes a species and interaction between different species makes community. Interaction of living and non-living things make an ecosystem.
Community involves interaction between all the living organisms present in a given environment. Hence, interaction between fish, bacteria, and mammals that live in a lake is a community.
Hence, the correct answer is "B. All of the fish, bacteria, and mammals that live in a lake".
if 120 seeds are produced how many of them should grow into white flowering plants?
Answers
What are 3 characteristics of balanced forces?
Answers
Answer:
hope this helps ! ( 0 > 0 )
Explanation:
When forces are balanced there is no change in direction.
Combined forces that are balanced are always equal to zero. (combining vectors)
Balance forces cannot change the motion or direction of an object.
A balanced force keeps an object moving at a constant velocity. (Newton's 1st Law of Motion)
What is the force responsible for seafloor spreading and the formation of new ocean floor at mid-ocean ridges?
a. the destruction of ocean crust in trenches
b magma from the mantle is forced up toward the ocean ridge
c. ocean crust sitting on the asthenosphere d. the differences in mass of the ocean and continental plates
Answers
B. Magma from the mantle is forced up toward the ocean ridge.
Seafloor spreading is a process by which new oceanic crust is created at mid-ocean ridges and the older crust is destroyed at oceanic trenches. The process is driven by the movement of the Earth's tectonic plates. At the mid-ocean ridges, the plates are moving apart, creating a space between them that is filled by magma from the mantle. The magma rises to the surface and cools, forming new oceanic crust.
two processes of producing energy for an ecosystem include...
a) photosynthesis & chemosynthesis
b) fermentation & photosynthesis
c) chemosynthesis & respiration
d) respiration & fermentation
Answers
Answer:
A) photosynthesis and chemosynthesis
Explanation:
Chemosynthesis is the biological conversion of one or more carbon-containing molecules and nutrients into organic matter using the oxidation of inorganic compounds or ferrous ions as a source of energy and photosynthesis obviously.
1. Not all electromagnetic waves can be detected
by the human eye. Which of these choices is an
example of this type of electromagnetic wave?
A. Red light
B. Blue light
C. Violet light
D. Ultraviolet light
Answers
Answer:
the answer is D
Explanation:
ultraviolet light is an electromagnetic wave
Easy! Please Help! A man is walking through the woods with his dog. Suddenly, a tree limb falls in his path and he leaps out of the way to avoid it. Then the man's dog gets loose, and he ends up chasing it through the woods for a minute or two before he manages to catch it.
a) Describe the function of the respiratory system in this situation.
b) Describe the function of the endocrine system in this situation.
c) Describe the function of the nervous system in this situation.
d) Describe two ways that any of the man's body systems worked together in this situation.
Answers
The answers include the following:
The respiratory system gave the cells more oxygen via breathing to perform various activities.The endocrine system released hormones such as adrenaline to activate chemical changes and stay alert.The nervous system carried electrical impulses necessary for the contraction and relaxation of muscles.The bones and muscles worked together to ensure adequate movement.What is Musculoskeletal system?This is the system which comprises of bones, ligaments etc and ensure that the body system has a rigid structure.
It also ensures organisms are able to move from one place to another in search of food and for their survival.
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