Which two domains of life contain only prokaryotes.
Answers
The two domains of life that contain only prokaryotes are Bacteria and Archaea.Bacteria and Archaea are the two domains of life that contain only prokaryotes. Prokaryotes are unicellular organisms that lack a cell nucleus and membrane-bound organelles, which means that they have no compartmentalization within their cells.
The cytoplasm of a prokaryote is characterized by the presence of ribosomes, which are responsible for protein synthesis. In addition, the cell membrane, cytoplasm, and ribosomes are present in all prokaryotic cells. Bacteria are among the most numerous and diverse organisms on the planet, and they can be found in almost every environment.
They were once classified as bacteria, but genetic analysis has revealed that they are sufficiently different from bacteria to warrant their own domain. Archaea play critical roles in the cycling of nutrients in many environments and are thought to have played a key role in the evolution of life on Earth.
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Related Questions
You push a ball with a net force of 2 N and it accelerates. What happens if you exert 2 N of net force on an object that has 3 times the mass? Responses The object will accelerate 3 times as much because if you apply the same net force and increase the mass, the acceleration will increase. The object will accelerate 3 times as much because if you apply the same net force and increase the mass, the acceleration will increase. The object will accelerate the same amount as before because the mass does not affect the object’s acceleration The object will accelerate the same amount as before because the mass does not affect the object’s acceleration The object will not accelerate because now it is too heavy. The object will not accelerate because now it is too heavy. The object will accelerate 1/3 as much because if you apply the same net force but increase the mass, the acceleration will decrease.
Answers
If you apply the same net force but more mass, the acceleration will be reduced, therefore the item will accelerate by just 1/3 as much.
What is the easiest way to define a force?The push or pull on a mass-containing item changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.
What is an illustration of force?An acceleration-inducing push is referred to as a force. This can literally mean pushing anything, such as moving a large piece of furniture around a room by pushing on it. That might not be as concrete as pressing the gas pedal on a car.
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Why did the population of deer increase during the wolves absence?
a Humans planted more plants in the area
b Their predators were gone
c The deer switched from asexual to sexual reproduction
d Rivers brought more fish to the area
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Answer:
the answer is b
Explanation:
because their predators left so with nobody to kill them the population will increase
What are some body functions that rely on chemical interactions
Answers
Answer:
Metabolism!!
Not to mention pretty much the entire digestive tract and nervous system.
Explanation:
Enzymes help speed up chemical reactions in the human body. They bind to molecules and alter them in specific ways. They are essential for respiration, digesting food, muscle and nerve function, among thousands of other roles.
Alice was participating in a photosynthesis lab for science class. The lab procedures instructed Alice to prepare a test tube containing water, a sprig of elodea (a common aquarium plant), and 10 g of sodium bicarbonate (NaHCO3). She was then instructed to place the test tube in front of a strong light source for one minute. Alice noticed tiny bubbles forming on the leaves of the elodea. What is the most logical explanation for why Alice saw bubbles forming on the leaves of the elodea?Group of answer choicesThe bubbles formed as a result of the hydrogen from the sodium bicarbonate mixture dissolving the elodea leaves.The bubbles formed from the release of water molecules from the elodea leaves.The bubbles formed as the elodea plant released oxygen from the elodea leaves.The bubbles formed as the elodea plant released carbon dioxide from the elodea leaves.
Answers
Step 1.
Write down the experiment data.
- tube containing water;
- alodea (photosynthetic organism);
- 10 g of sodium bicarbonate;
- light source.
Step 2.
Why bubbles are formed on the leaves of the alodea?
The experiment have all the condictions for photosynthesis, since it provides: water (that is in the tube), CO2 (because of the dissolved sodium bicarbonate), light (because of the string light source). Therefore the most ogical explanation for Alice experiment results is: the bubbles formed as the elodea plant releases oxygen from the elodea leaves, that because with all the elements in the experiment the plant can do a normal photosynthetic process that way realing oxygen in the tube and forming bubbles of "air".
Which of the following terms is defined as the use of technology to change the genetic makeup of a species?
fertilization
genetic modification
genome
irrigation
Answers
Answer:
\/ \/ \/ (if this helps)
Explanation:
Genetic modification is the method of modifying an organism's genetic structure by using recombinant DNA (rDNA) technology. A gene from another animal is most commonly applied to the genome of an organism to give it a phenotype that is desired.
A scientific theory states that something will happen. _______________
True or FALSe ?
Answers
Answer:
False
Explanation:
It state how or why something will happen.
during inspiration, the diaphragm must , causing the thoracic cavity to . a. contract; expand b. contract; compress c. relax; contract d. relax; expand
Answers
The external intercostal muscles and contract during inspiration, expanding the thoracic cavity.the intrapleural pressure decreases, increasing the transpulmonary pressure and expanding the lungs.
The diaphragm flattens and tightens during inhalation, and the chest widens. A vacuum is produced by the contraction, drawing air to the lungs. The muscles relax and assumes its dome-like form during exhalation, forcing air out the lungs. The diaphragm flattens and tightens during inhalation, as well as the chest cavity widens. A vacuum is produced by the contraction, drawing air to the lungs. The muscles relax and assumes its dome-like form during exhalation, forcing air out the lungs. The external intercostal muscles and diaphragm flex during inspiration, extending the rib cage and moving it outward as well as the thoracic cavity and lung capacity.
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Which statement best describes the process of crossing over? (1 point)
A.Homologous chromosomes pair up, and non-sister chromatids exchange genetic material.
B. Pairs of homologous chromatids are divided in half and distributed randomly into new diploid cells.
C.Homologous chromatids pair up, and non-sister chromosomes exchange genetic material.
D.Pairs of homologous chromosomes are divided in half and distributed randomly into new haploid cells.
Which cell replicates via meiosis?
A.sperm cell
B. red blood cell
C. heart cell
D.skin cell
Answers
Answer: process in genetics by which the two chromosomes of a homologous pair exchange equal segments with each other
Explanation: sperm cells
CROSSING OVER:
Crossing over is a unique process that occurs only during meiotic division. Crossing over, also called recombination, occurs during prophase I of meiosis. Crossing over is the process by which non-sister chromatids of homologous chromosomes (a pair of similar but non-identical chromosomes from each parent). Crossing over ensures genetic diversity in the gametes (daughter cells) produced from meiosis:MEIOSIS:
Meiosis is the type of cellular division employed by sexual reproducing organisms to create sex cells or gametes. Meiosis produces four genetically different daughter cells called gametes. Sperm cells are gametes produced by male organism while egg cells are gametes produced by female organisms.Learn more: https://brainly.com/question/18824252?referrer=searchResults
Some scientists believe Earth's orbit around the sun has changed contributing to global warming.
Answers
Post-puberty hypersecretion of growth hormone from the anterior pituitary gland:_________
Answers
Post-puberty hypersecretion of growth hormone from the anterior pituitary gland
Acromegaly
you half to describe what the people are doing in the picture
Answers
lamar constantly thinks about dirt and bacteria that exist all around him, and he feels compelled to wash his hands many times throughout the day. these thoughts and actions upset him and he wishes that he could control them. this is an example of the criterion for defining abnormal behavior.
Answers
Any behavior that is abnormal, statistically rare, harmful to the individual or those around them, or that is otherwise uncharacteristic of the culture in question.
Disorders of abnormal psychology include anxiety disorders, compulsive behaviors, PTSD, mood disorders, personality disorders, schizophrenia, delusional disorders, substance use disorders, dissociative disorders, and impulse control disorders. Such behavior is frequently seen as a sign of a mental or emotional disturbance, which can range from mild adjustment issues to serious mental disorders.
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Many scientists claim that the synthesis of the first organic molecules
Answers
Many scientists claim that the synthesis of the first organic molecules from inorganic precursors was possible due to highly reducing atmosphere on primitive Earth.
What are organic molecules?The molecules consist of carbon atoms either in ring form or in straight chains is referred to as organic molecules.
It is suggested that the first organic molecules was from inorganic precursors due to highly reducing atmosphere on primitive Earth.
Thus, it can be concluded that many scientists claim that the synthesis of the first organic molecules from inorganic precursors was possible due to highly reducing atmosphere on primitive Earth.
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Here's a fact you could've lived without knowing.
You can physically bite off your fingers like carrots. But there's a nerve in your brain that keeps you from doing so.
Let hope you don't damage that nerve!
Answers
Answer: woooow
Explanation:
Why it's important for Environmental Scientists to have a background in many different fields of study?
Answers
Answer:
Environmental science involves different fields of study. ... Environmental scientists and specialists use their knowledge of the natural sciences to protect the environment and human health. They must have a solid background in economics, sociology, and political science.
""Follow me ""
What was known before Franklin and Wilkins conducted their studies of DNA? Select three options.
DNA is found in the nucleus of a cell.
The human genetic code is made of 50,000 genes.
Organisms store and transmit genetic information.
DNA has a double-helix structure.
Cells contain protein molecules.
Answers
The correct answer will be-
1. DNA is found in the nucleus of a cell
2. Organisms store and transmit genetic information
3. Cells contain protein molecules.
Explanation:
The study of DNA started much before the discoveries of Rosalind Franklin and Maurice Wilkins.
Nucleus of cell was discovered by Robert Brown in 1831 but the material present inside the nucleus called "nuclein" (DNA) came from the studies of Johann Friedrich Miescher in 1869.
Proteins as a constituent of cell were discovered by the experimental analysis of Gerhardus Johannes Mulder in 1837.
DNA as a genetic material came from the experimental studies of Frederick Griffith in 1928, Oswald Avery, Maclyn McCarty, and Colin MacLeod in 1944, and Hershey and Chase in 1952.
Franklin and Maurice Wilkins are known for their work on the the structure of DNA as they were able to produce high-resolution X-ray photographs of DNA fibres called Photo 51 in 1952 using X-ray diffraction technique. By 1953 Franklin concluded concluded that DNA shows helical structure with phosphates on outer side.
Thus, 1. DNA is found in the nucleus of a cell
2. Organisms store and transmit genetic information
3. Cells contain protein molecules.
are the correct options.
Answer:
A, C, and E :DD
Explanation:
Hope this helps have a good day :>
The rock in the image is marble, which has many layers and is extremely hard. It was formed under high heat and pressure. Marble is an example of
rock changing into
rock.
Answers
Answer:
Marble is a metamorphic rock.
Explanation:
Metamorphic rocks were once igneous or sedimentary rocks, but have been changed as a result of intense heat and/or pressure within the Earth's crust. They are crystalline and often have a “squashed” texture.
How is commensalism different from mutualism?
Answers
Answer:
So, to review, mutualism is where both organisms benefit, commensalism is where one benefits and the other is unaffected, and parasitism is where one benefits and the other is harmed.
Answer:
So, to review, mutualism is where both organisms benefit, commensalism is where one benefits and the other is unaffected, and parasitism is where one benefits and the other is harmed
the authors of both passages provide information about scientists' hopes to successfully clone animals. what reasons do the authors provide
Answers
For choosing an audience it is important to think the characteristics of the people who would be interested on knowing about the theme, in this case Cloning Humans.
For talking in favor on cloning:
Biological researchers and students could be a great audience, thus their daily work is based on knowing about new technologies.Rich people interested on having copies on themselves, would be also and excellent target.On the other hand is the essay is written to criticize Cloning Humans maybeHuman Rights defenders would be interested in reading the article as well as conservative doctors.Choosing will depend on what you choose on your essay; an then its success would consists on writing what your audience does not know and would be interested on knowing.
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Full Question ;
"Scientists have successfully cloned animals, such as Dolly the sheep. Some people hope that cloning techniques will be used to clone humans someday, while others strongly oppose this use of technology. What is your position on cloning humans? Write a persuasive essay articulating your position on the cloning of humans. Use specific examples and details to support your views."
Choose an audience for this research project. Describe the intended audience for this paper. With your topic in mind, determine what they already know and what you will need to cover.
The authors of both passages provide information about the potential uses of cloning and transgenic technology, as well as the scientific advancements that could be made through the successful cloning of animals.
Ethical considerations for transgenic organisms:
The authors should discuss the ethical considerations surrounding the cloning of animals, and the potential risks and benefits of these technologies. Additionally, they mention the possibility of using transgenic animals for research purposes, such as the development of new medical treatments or the production of new agricultural products. Overall, the authors suggest that cloning and transgenic technology could have a variety of important applications, but also emphasize the need for careful consideration of the ethical and practical implications of these technologies.
The reasons provided by the authors for cloning animals are likely related to the development of transgenic animals, which are genetically modified to have specific desired traits. Some uses of cloning animals include producing animals with enhanced agricultural qualities, aiding in the research of human diseases, and preserving endangered species. By cloning animals, scientists can achieve these objectives and advance the fields of agriculture, medicine, and conservation.
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Peacock females pick their mate according to the male's tail. The ones with the largest and brightest tails mate more often. Today, males that do not have bright feathers are very rare. Explain why this has occurred detail.
Answers
Answer: Male peacocks tend to have brightly colored tail feathers due to sexual selection. The female peacocks chose their mates based on the largest and brightest tail feathers. This encouraged a positive feedback mechanism over generations for brightly colored tail feathers.
Identify the organ systems in your body that need to work together when dancing, eating bread, writing on a piece of paper.
Answers
Answer:
Muscular system, nervous system, skeletal system
Digestive system, blood circulatory system, respiratory system
Nervous system, muscular system, skeletal system
1-Muscular system: The muscles in the body need to work together to produce the movements and poses associated with dancing.
2-Skeletal system: The bones in the body provide the structure and support needed for dancing, allowing the body to move and perform various positions and movements.
3-Cardiovascular system: The heart and blood vessels in the body need to work together to pump oxygen-rich blood to the muscles being used in dancing, providing the energy needed for movement.
4-Nervous system: The nerves in the body help to coordinate and control the movements of the muscles and other organ systems during dancing.
When eating bread, the following organ systems in the body need to work together:
1-Digestive system: The digestive system is responsible for breaking down the bread into smaller molecules that can be absorbed and used by the body for energy. This process involves the mouth, teeth, esophagus, stomach, small intestine, and large intestine.
2-Cardiovascular system: The heart and blood vessels help to transport nutrients and oxygen to the cells of the body, providing the energy needed to power the processes of digestion and metabolism.
3-Muscular system: The muscles in the body, particularly those in the mouth and throat, are used to chew and swallow the bread.
When writing on a piece of paper, the following organ systems in the body need to work together:
1-Muscular system: The muscles in the hands, arms, and shoulders are used to hold and control the writing implement, and to make the movements needed to write on the paper.
2-Skeletal system: The bones in the hands, arms, and shoulders provide the structure and support needed to hold and move the writing implement, and to maintain proper posture while writing.
3-Nervous system: The nerves in the body help to coordinate and control the movements of the muscles, allowing the person to write with precision and control.
4-Cardiovascular system: The heart and blood vessels help to transport oxygen and nutrients to the cells of the body, providing the energy needed to power the processes of muscle movement and coordination
A molecule has an angular molecular geometry. The hybridization on the central atom must be.
Answers
For a molecule that is angular, the hybridization of the central atom must be sp3.
What is molecular geometry?The term molecular geometry has to do with the arrangement of the atom of the compound around the central atom of the molecule. In this case, we must have in mind that the number of the lone pairs of the atoms in the central atoms would always influence the geometry of the molecule.
Now, when we say that a given molecule has an angular molecular geometry, we must have in mind that the central atom must have to be in an sp3 state of hybridization.
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A balance between incoming and outgoing radiation produces a stable climate. Lack of a balance incoming and outgoingradiation results in a net loss or gain of radiant energy to the system. This energy imbalance is expressed as climate change. Explain the steps in the steps in the system of energy input and output
Answers
Answer:
The energy that Earth receives from sunlight is balanced by an equal amount of energy radiating into space. ... When the flow of incoming solar energy is balanced by an equal flow of heat to space, Earth is in radioactive equilibrium, and global temperature is relatively stable
Explanation:
A balance between incoming and outgoing radiation produces a steady-state and stable global climate. Lack of a balance between incoming and outgoing radiation implies a net loss or net gain of radiant en- ergy to Earth's climate system.
e distribution diagrams (pyramids):
O How do the pyramids differ for countries that are increasing rapidly, versus ones
that are increasing slowly, versus ones that are declining in population size?
Answers
Fast-growing countries have well-defined pyramids, slow-growing countries have poorly-defined pyramids, and population decline countries have an inverted pyramid.
What do these pyramids represent?The pyramids represent the age distribution of the population.The pyramids represent the youth level of the population.The tip of the pyramids indicates the concentration of young adults in a country, showing how much the country is growing or declining in population.
Countries that have a well-defined pyramid are growing, as the number of young adults is increasing exponentially. Countries with slow growth have less defined pyramids, with a more rectangular shape, since their population has a more harmonious number of young and old adults.
Declining countries show an inverted pyramid, as the number of young adults is very small in relation to the number of elderly people.
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Bats and hummingbirds both have wings and can fly. This is due to__________. a. convergent evolution b. co-evolution c. co-adaptation d. divergent evolution
Answers
Bats and hummingbirds both have wings and can fly. This is due to
(a) convergent evolution.
The process of convergent evolution is when various species independently develop identical traits in response to comparable environmental stresses. Both bats and hummingbirds have the ability to fly, although these traits have independently developed in the two species. Although they have diverse ancestries and their wings have evolved via various genetic and evolutionary processes, they share significant structural similarities.
These developmental of similar character help the organism to better survive in its in its environment and able to perpetuate its progeny. Evolution thus help to produce better suited individual to the environment.
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Convergent evolution is a process in which two species that are not closely related independently develop similar traits.
This is due to the fact that they are both exposed to similar evolutionary pressures, and so they both develop similar adaptations in order to survive and thrive. While bats and hummingbirds are not directly related, they both have developed wings and the ability to fly due to convergent evolution.
Bats and hummingbirds have both evolved to have lightweight bones, a streamlined body shape and wings that can be maneuvered quickly and efficiently. These adaptations allow them to fly through the air and take advantage of the food sources available to them in their environment.
Additionally, both bats and hummingbirds are able to use their wings to generate lift and navigate around obstacles.
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what neuro-hormone is called the 'cuddle' hormone and primes you to strengthen close relationships?
Answers
Oxytocin, also known as the "cuddle" hormone, is a neuro-hormone that encourages people to deepen their bonds with one another.
Due to its function in encouraging social bonding and affectionate behaviours, the neuro-hormone oxytocin is sometimes referred to as the "cuddle" hormone. Oxytocin is a hormone that is made in the brain and released by the pituitary gland. It has a role in a number of social and emotional functions. It is essential for encouraging attachment and fostering tight bonds. Oxytocin helps people experience love, trust, and connection when it is released in the brain, which promotes stronger emotional ties and social interactions. It promotes maternal-infant loving behaviours and has a strong impact on nursing. It also has a positive impact on maternal-infant bonding.
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How are shapes and volume used to classify solids, liquids, and gasses?
Answers
Answer:
With messurements
Explanation:
Answer:
Solids have a definite shape and volume. Liquids have a definite volume, but take the shape of the container. Gases have no definite shape or volume.
Explanation:
More information in this link, you may find what your looking for:
https://chem.libretexts.org/Courses/can/intro/03%3A_Matter_and_Energy/3.03%3A_Classifying_Matter_According_to_Its_State%3A_Solid%2C_Liquid%2C_and_Gas#:~:text=liquid%2C%20and%20gas.-,Solids%20have%20a%20definite%20shape%20and%20volume.,no%20definite%20shape%20or%20volume.
i really need someone to help!! i’ll give brainlist and 50 points!
Answers
Answer:
the polar bear walks 30 seconds per minute
is an example of the degeneracy of the genetic code.
A.An amino acid has more than one codon.
B.Each codon specifies more than one amino acid
C.The first two bases in the CCA terminus of tRNA specify an amino acid.
D.The genetic code in mRNA is a triplet of bases.
Answers
Explanation: in a sequence of dna one codon is a triplet of based and when you look at the codon in an amino acid each one should consist of either one codon or one set of triplet bases.
The element nitrogen is present in all of the following except A) proteins.B) nucleic acids.C) amino acids.D) DNA.E) monosaccharides.
Answers
Nitrogen is present in all of the options listed except for monosaccharides. Thus, correct option is (E).
A crucial component of biological compounds is nitrogen. Nitrogen is a component of proteins, nucleic acids (DNA and RNA), amino acids (which serve as the building blocks for proteins), and DNA. Amino acids, which make up proteins, contain nitrogen as a necessary part of their structure.
Adenine, cytosine, guanine, and thymine/uracil are nitrogenous bases that are essential for the operation of nucleic acids, including DNA. Monosaccharides, simple sugars and the fundamental unit of carbohydrates, do not, however, include nitrogen. Instead, the majority of their atoms are made up of carbon, hydrogen, and oxygen.
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