Solid - definite shape and volume
Liquid - no definite shape but definite volume
Gas - no definite shape or volume
Plasma - high temperature physical state of matter in which atoms lose most of their electrons
are fragments with the same number of base pairs always the same exact fragment?
No, the fragments with same number of base pairs do not always the same exact fragments.
Explanation:Lets take an example, There are two fragments of DNA, having 20 number of base pair each. But the one fragment contains a sequence in which there are 12 GC base pairs.
The second fragment contains sequence with only 5 GC pairs.
Hence the same number of base pairs in fragments does not assure Exact fragments.
The structure that regulates what enters and leaves the cell is called
The plasma membrane is the cell structure that regulates what enters and leaves the cell. It has selective permeability, allowing only certain substances to pass through, providing both protection and support to the cell.
Explanation:The structure that regulates what enters and leaves the cell is called the plasma membrane. This membrane separates the cell from the external environment and controls the passage of organic molecules, ions, water, oxygen, and waste in and out of the cell. The plasma membrane has the ability to regulate the concentration of substances inside the cell, a property referred to as selective permeability.
It allows only certain substances to pass through, while keeping others in or out, including ions such as Ca+, Na+, K+, and Cl¯; nutrients including sugars, fatty acids, and amino acids; and waste products, particularly carbon dioxide (CO2), which must leave the cell. Not only does the plasma membrane control what material enters and leaves the cell, but it also provides protection and support to the cell.
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Compare optimal temperature and optimal pH for catalase to the physiological conditions of a cell.
The optimal temperature for catalase to the physiological conditions of a cell is 37 degree Celsius. The optimal pH for the enzyme is neutral, that is, 7.0. Catalase is generally used by the majority of animals to catalyze hydrogen peroxide into water and oxygen.
Hydrogen peroxide is one of the harmful byproducts of certain kind of metabolic procedures and must be transformed quickly post creation to inhibit damage.
Which type of chemical reaction tends to occur on its own, or spontaneously?
A reaction is called spontaneous when it takes place of its own accord without any external help. It is an exothermic reaction and it is a spontaneous reaction . Above examples show, both exothermic and endothermic reactions could be spontaneous.
There are various types of chemical reactions based on the properties of the reactant. Exergonic reactions are chemical reactions that tend to happen spontaneously.
What are Exergonic reactions?Exergonic reactions are defined as chemical reactions that show spontaneous nature and releases energy out into the surrounding. The reactants form a stronger bond when they are joined instead of when the bonds are broken.
In a biological system, the exergonic reactions occur when glucose is broken down into waste and carbon dioxide during the cellular respiration step. This released amount of energy is used by the cells to function and plays various roles.
Therefore, exergonic chemical reactions are spontaneous reaction that tends to occur on their own.
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Venus is an average distance of 108.2 million kilometers from the Sun. Use the conversion factor 1 AU = 1.5 × 108 km to convert this distance from kilometers to astronomical units. Choose the closest answer. A. 0.72 AU B. 1.25 AU C. 3.56 AU D. 45.63 AU E. 96.12 AU
[tex]108.2\ million \km = 108.2*10^6\ km = 1.082*10^8\ km
Using a proportion:
\frac{1,082*10^8}{1,5*10^8} = 1.082/1.5 = 0.72 AU[/tex]
Answer: A) 0.72
Answer:
0.72
Explanation:
The image shows EKGs Of a person. With normal heart waves and of a person having tachycardia.Based on the image wat condition is tachycardia
Answer:
its b
Explanation:
Which actions destroy topsoil? Check all that apply.
1 mowing land
2 eroding of land by wind
3 plowing land without replanting
4 overusing land
5 sowing seeds in land
2 eroding of land by wind
4 overusing land
3 plowing land without replanting
2 eroding of land by wind
3 plowing land without replanting
4 overusing land
The topsoil is the upper and outermost layer of the soil. It exhibit high amount of organic matter and the microorganisms remain active in the layer. It is composed of mineral particles, water, organic matter and air. It is fertile in nature and can support plant growth.
The erosion of land by wind: The soil erosion can occur due to agents like wind and water. These agents displace the top layer of soil and the components are deposited to other places.
Plowing land without replanting: Plowing is an agricultural practice in which the compact and tight soil is improved by turning up using a tool. It is done before sowing of seeds. Plowing can result in the soil erosion by wind as the loose soil can be easily blown up by wind.
Overusing land: The land can be overused in agricultural practice and mining. These practices can remove the topsoil layer.
what is the difference between a round worm and a true worm
The basic difference between them is that Earthworms are segmented invertebrates belonging to the phylum Annelida, Tapeworms are flatworms belonging to the phylum Platyhelminthes, and Roundworms are parasitic worms belonging to the phylum Nematoda.
Is this biology class? Lol
How might the oceans on early Earth have formed?
The oceans on early Earth formed as the planet cooled and volcanic activity released gases through outgassing. Water vapor in the atmosphere condensed and created rain, which filled basins to form primitive oceans. Additional water from space may have contributed to this process.
Approximately 4.6 billion years ago, when Earth formed, it was a molten world without an atmosphere or oceans. Over time, Earth's early, hot surface began to cool, allowing for a solid crust to form. As the climate continued to cool and the crust solidified, volcanic activity was prevalent, emitting various gases, a process known as outgassing. The outgassed water vapor, along with gases like carbon dioxide (CO2) and methane (CH4), started to build Earth's early atmosphere.
Eventually, as the atmosphere cooled further, the water vapor started to condense, and Earth experienced its first rainfall. This condensation and the subsequent precipitation were crucial steps in the formation of Earth's oceans. Additional water is theorized to have been delivered by comets and asteroids striking the planet.
Over millions of years, and as the surface temperature dropped, persistent rainfall filled basins and low areas, forming the primitive oceans. The atmosphere, once hostile and rich in reducing gases like methane and ammonia, began to transform as the Earth evolved towards supporting life as we know it today.
By about 3.8 billion years ago, enough cooling had occurred to allow rainwater to stay liquid and not vaporize upon contact with the Earth's surface. Thus, the early warm, shallow oceans were formed in a reducing environment with little oxygen. Later tectonic activity would reshape these primitive oceans into the complex distribution of seas and continents present on modern Earth.
Researchers have historically considered the human appendix to be a vestigial structure. What evidence, if true, would best disprove this claim? A. The appendix was used to help digest leaves in the ancestors of humans, but it appears to serve no function in modern humans. B. Cows have an appendix to help them digest grass, but it evolved independently from the appendix found in humans. C. The human appendix helps to maintain the health of the gut, and arose fairly late in the evolutionary history of mammals. D. Chimpanzees also have an appendix, and humans and chimpanzees inherited the appendix from the same ancestor.
The correct answer is C) The human appendix helps to maintain the health of the gut, and arose fairly late in the evolutionary history of mammals.
Vestigial organs are those organs that have lost all or most of their functions. One of its example is appendix. Some researchers think that the appendix in humans was used to digest cellulose( present in plant). Some scientist believe that modern human appendix play role as a house for digestion-aiding bacteria.
Answer:
The human appendix helps to maintain the health of the gut and arose fairly late in the evolutionary history of mammals.
Explanation:
I got it right. The other person is right, I just like having photographic evidence. Hope this helps. :)
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Which blood type could be given as a transfusion for patient with AB blood when the RH factor is unknown
Answer:
AB-
Explanation:
All AB blood can receive AB-, but only AB+ can receive AB+, so it is safer to use AB- if the RH factor is unknown.
AB+ can receive AB+ or AB-
AB- can only receive AB-
what ocean zone does plankton live in
Plankton grows in the Sunlit Zone. It is also know as the euphotic zone. There is enough light going in the water to support photosynthesis. Because of photosynthesis, more than 90 percent of all marine life lives in this zone.
Name three unifying themes found in biology
cell structure, evolution, homeostasis
Which property remains unaffected during the rock cycle?
A)
Texture of the rock
B)
Mass of the material
C)
Structure of the rock
D)
Composition of the minerals
4)
Which of these statements would support the claim that digitized signals are a more reliable way to transmit information?
A)
Analog signals often pick up extraneous information.
B)
Analog signals can be recorded using magnetic devices.
C)
Digitized signals can be stored on small computerize devices.
D)
Digitized signals do not lose information even as they get weaker.
5)
You have a small piece of iron at 75 °C and place it into a large container of water at 25 °C. Which of these best explains what will occur over time?
A)
The iron will cause the water to boil and turn to steam.
B)
The iron will take the heat from the water and get hotter.
C)
The water will cool significantly due to its colder temperature.
D)
Some heat from the iron will move to the water causing both to change temperatures.
The soft-tissue lining of oysters and clams creates pearls. Is a pearl a mineral? Yes, because it forms naturally. Yes, because it is beautiful and rare. No, because it is created artificially. No, because it is an organic substance.
No, because it is an organic substance. They are considered gems, but not minerals. :)
Answer:
Although the soft-tissue lining of oysters and clams creates pearls, pearl is not a mineral because it is an organic substance. The correct answer is the last one.
Explanation:
Pearls are often considered gemstones; they are a composite of the mineral Aragonite and the organic compound conchiolin, which is a protein, and the combination of both of them is called nacre.
how are sessile leaves different from ordinary leaves?
Organic(Ordinary) leaves are grown on trees organically by water(Dew) and temperature. 1 difference between Sessile and Ordinany leaves is the time of year when they fall off.
I'll give you a hint for the rest, Do sessile fall? Do Ordinany leaves fall? Do both? Do neither?
The main difference between sessile and ordinary leave is petiole.
Sessile leaves lack sessile while ordinary leaves have a petiole. In botany, sessility (meaning "sitting", used in the sense of "resting on the surface") is a characteristic of plant parts that have no stalk. Flowers or leaves are attached directly from the stem or peduncle, and thus Sessile leaves lack a lack a petiole or pedicel. The leaves of the vast majority of monocotyledons lack petioles.
The ____ identifies an element
Atomic Number. I hope that's what you were asking.
Answer:
The atomic number identifies an element
Explanation:
The atomic number of an element refers to the number of protons in each atom of the element. While the number of neutrons and electrons can vary, changing the masic number as a consequence, the number of protons in an element never changes and because of that it accurately defines it.
Which activity might lead to damage of a microscope and specimen
The correct answer is the application of the coarse adjustment to focus the specimen under high power.
One should always remember while using the coarse adjustment to focus the microscope is to use it only with the low power objective. One should prevent the use of coarse adjustment when focusing on high power because the image moves in and out of focus too prompt that it becomes tough to accurately adjust the focus.
Secondly, one may run the threat of crashing the objective into the slide, that is, why it is recommended to use the coarse focus only with the 4x low power objective. However, one can use the fine focus knob with all the objectives.
Improper cleaning of lenses, carelessly adjusting the focus and objective, misuse of immersion oil, and not securing the microscope when not in use can lead to microscope and specimen damage.
Explanation:
There are several activities that could potentially lead to damage of a microscope and specimen. These include activities such as not cleaning the lenses with lens paper, allowing the lens to come into contact with the slide by rapidly changing the focus, pushing an objective into a slide, and using the coarse focusing knob when using the 40× or greater objective lenses. Moreover, only using immersion oil with a specialized oil objective, generally the 100× objective and cleaning oil from immersion lenses after using the microscope is critical.
Damage may also come from negligence when a microscope is not being used, such as not covering it or placing it in a cabinet. Looking at a specimen, if the slide with the specimen is not properly secured and centered over the light, damage may occur. It is crucial to take the utmost care when using a microscope and handling specimens to avoid any damage that may affect the accuracy of your observations and study.
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Which of the following is a farming method that helps reduce the effects of wind erosion? A. Planting wind barriers B. Irrigation C. Terracing D. Planting crops deeper into the ground
what is the function of each lymph organ?
MATCH THE WORDS DOWN BELOW WITHE THE DEFINITIONS!!
thymus
tonsils
spleen
redbone narrow
the organ where a special lymphocyte
that aids the immune system
is activated
the organ that acts as the first line of
defense in the nasal and oral cavity
the organ where lymphocytes are
synthesized, developed,
and matured
the organ in which macrophages
break down old blood cells and
bacteria or viruses
Answer:
Tonsils ----> organ that acts as the first line of
defense in the nasal and oral cavity.
Thymus ----> organ where a special lymphocyte
that aids the immune system
is activated.
Red bone marrow ----> organ in which macrophages
break down old blood cells and
bacteria or viruses.
Spleen ----> organ where lymphocytes are
synthesized, developed,
and matured
organ that acts as the first line of
defense in the nasal and oral cavity .
Explanation:
The correct answer is as follows:
Tonsils: organ that acts as the first line of defense in the nasal and oral cavity.
Thymus: organ where a special lymphocyte that aids the immune system is activated.
Red bone marrow: organ in which macrophages break down old blood cells and bacteria or viruses.
Spleen: organ where lymphocytes are synthesized, developed, and matured organ that acts as the first line of defense in the nasal and oral cavity.
What are the function of lymph organ?
The lymphatic system is open, in contrast to the circulatory system, which is a closed system. An average of 20 liters of blood are processed by the human circulatory system each day through capillary filtration, which purges the blood of plasma. Three liters of the filtered blood are left in the interstitial fluid, while around 17 litres are reabsorbed into the blood arteries. The lymphatic system's primary job is to give the extra three litres of blood a secondary return pathway to the blood.
Immune defense is the other primary purpose. In that it contains germs, proteins, and cellular waste along with waste products and cellular debris, lymph is remarkably similar to blood plasma. Most of the lymph's cells are lymphocytes. Associated lymphoid organs are made of lymphoid tissue and serve as either the loci for producing or activating lymphocytes.
The correct answer is as follows:
Tonsils: organ that acts as the first line of defense in the nasal and oral cavity.
Thymus: organ where a special lymphocyte that aids the immune system is activated.
Red bone marrow: organ in which macrophages break down old blood cells and bacteria or viruses.
Spleen: organ where lymphocytes are synthesized, developed, and matured organ that acts as the first line of defense in the nasal and oral cavity.
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During the water cycle, the sun's energy evaporates water from the surface of Earth. This water returns to Earth as some form of
precipitation. i think.
What effect does an unbalanced for have on an object
A. The object will remain at rest
B. The objects motion will not change
C. The object will accelerate
D. The mass of of the object will decrease
Which organism contains tissues?
A. seal
B. amoeba
C. bacterium
D. paramecium
The correct answer would be A. seal as paramecium, bacterium, and amoeba are all single-celled organisms. Thus, they cannot be an organism with tissues.
A seal is the only organism that contains tissues!!!
Arrange the steps in the correct order to describe how a reflex occurs. A receptor detects a signal. A relay neuron sends a signal to a motor neuron. A sensory neuron sends a signal to the spinal cord. A bone moves. A muscle receives a signal to contract. ↓ ↓
The right order is
1. A receptor detects a signal
The stimulus (ie the external signal), by its action on the sensitive area of the sensory receptor called transducer site, creates a variation of potential whose course and amplitude depend on the stimulus.
This variation of potential constitutes the receiver potential.
This conversion of the stimulus into a receptor potential, called transduction, is related to changes in the permeability of the receptor cell membrane.
2. The sensory nerves sends a signal to spinal cord .
Sensory information is detected by peripheral sensory receptors and then transmitted to the central nervous system via sensory neurons, otherwise known as afferent fibers. These sensory neurons have a particular morphology, they are called "T" neurons because the single dendrite and the axon that emerge are contiguous to the cell body, located in the ganglion, then separate to connect the sensory receptor d one side, and the nerve center of the other.
3. The relay neuron sends a signal to motor nerves .
The motor nerves carry motor control from the central nervous system to the effectors that are mainly the muscles. These efferent nerve fibers originate in the central nervous system: the spinal cord and the motor brain centers. Efferent fibers emerge from the spinal cord through the ventral root of the ventral horn. From the spinal cord are motor neurons γ, which contact the neuromuscular spindle.
4. A muscle receives a signal to contract .
The neuromuscular spindle is a mechanoreceptor composed of modified muscle fibers. Arranged parallel to the muscle fibers, it is sensitive to the lengthening of the muscle, and translates a mechanical stimulus into a nervous message.
These spindles are sensory receptors. They therefore play an important role in static proprioception, as well as in kinesthesia.
They are also involved in the myotatic reflex: their role is then to increase the level of contraction of the muscle in response to its own stretching. The muscle tends to return to its original length.
5. A bone moves.
Muscular movement is based on the ability of a living structure to exert a force by shortening itself. Which requires:
* a contractile structure: the muscle
* a support structure (to be able to exert a force): the skeleton (bones and joints) and the tendons by which the muscles are attached to it
* a control system (the nervous system) and a control system (the nervous system or the immune system that act by chemical mediators (hormones, neurotransmitters ...) and adaptation (response to environmental stimuli) essentially comprising receptors (organs of internal and external perception) connected to the control nerve centers (brain).
Man uses the muscular force developed by his muscles that rely on a skeleton to perform movements under the control and control of the nervous system and organs of perception. put apart the reflexes, he can also use the movements of his limbs resting on the ground or water to move his whole body (walking, running, swimming ....).
A reflex begins when a receptor detects a signal, which sends an impulse via a sensory neuron to the spinal cord. It is then transferred to a motor neuron via a relay neuron, which leads to a muscle or gland reacting. If the reaction is a muscle contraction, it may cause a movement, such as the movement of a bone.
Explanation:A reflex is an automatic, involuntary response to a stimulus. The correct order of steps that describe how a reflex occurs are as follows:
A receptor detects a signal: This is the initial response where a change or threat in the environment is detected by a sensory receptor.A sensory neuron sends a signal to the spinal cord: The receptor then triggers a nerve impulse that travels along a sensory neuron to the central nervous system, specifically the spinal cord in this case.A relay neuron sends a signal to a motor neuron: Within the spinal cord, the impulse is transferred to a relay neuron which then transfers it to a motor neuron.A muscle receives a signal to contract: The motor neuron carries the signal from the spinal cord to a muscle or gland, causing it to reactA bone moves: In the case of a muscle, the reaction is a contraction which results in a movement, for example, the movement of a bone.Learn more about Reflex here:https://brainly.com/question/32323766
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Now let's look at an example in a plant cell from a leaf. Use the slider to examine a plant cell before and after the plant was watered with very salty water. After watering with salt water, the plant wilted. Propose an explanation as to why the plant wilted using evidence from the cell diagrams
Answer:The reason for the plant that its leaf got wilted after being watered with salty water is that salty water is so dense that it does not allows for osmosis through the plant tissues ans eventually it dehydrates the plant by actually taking water out of the plant.
There are chances that the salt water can be poisonous to the plant. Too much salt interferes in the chemical processes which the plant uses to spread the nutrients in the plant. This can kill the plant.
The plant wilted is due to the fact that the plant was dehydrated.
The experiment that was carried out was about a plant that was watered with salt water and after watering the plant with salt water, it wilted.
It should be noted that salty water is dense and doesn't give room for osmosis to take place. This leads to dehydration as it takes water out of the plant.
Also, it should be noted that when the salt is too much, it causes harm to the plant as it interferes in its chemical process. This eventually leads to the plant wilting.
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explain how heredity can be illustrated mathematically
Which equation best represents the process of photosynthesis?
1.6CO 2 + 12H 2 O → light + C 6 H 12 O 6 + 6O 2 + 6H 2 O
2.6CO 2 + 12H 2 O + light → C 6 H 12 O 6 + 6O 2 + 6H 2 O
3.C 6 H 12 O 6 + 6O 2 + 6H 2 O → light + 6CO 2 + 12H 2 O
4.C 6 H 12 O 6 + 6O 2 + 6H 2 O + light → 6CO 2 + 12H 2 O
It would be first one.
Lactase is a protein in the digestive tract that helps break down certain sugars found in milk. What is the main function of lactase? to provide structure to fight disease to maintain homeostasis to regulate cell reactions
Answer:
The correct answer would be "to regulate cell reactions".
Lactase is an enzyme that catalyzes the hydrolyses of lactose to form glucose and galactose.
It is present in the small intestine of mammals including humans and help in digestion of milk sugar that is, lactose.
The overall reaction can be written as:
C₁₂H₂₂O₁₁ (lactose) + H₂O → C₆H₁₂O₆ (glucose) + C₆H₁₂O₆ (galactose)+ heat
Answer:
the answer is D. to regulate cell reactions
Explanation:
How can human bones give forensic scientists an indication of age? Describe some of the aspects that would give this information.
Answer:
Human bones can be used for determination of age of the deceased. Age can be estimated from the bone by studying their ossification centers at this point fusion in the bone region takes place and the bone attains maturity. Skull suture also provide evidence of age, different sutures fuse at different age in humans. Pelvis also can give rough estimation of age.
Answer:
Human bones can be used for determination of age of the deceased. Age can be estimated from the bone by studying their ossification centers at this point fusion in the bone region takes place and the bone attains maturity. Skull suture also provide evidence of age, different sutures fuse at different age in humans. Pelvis also can give rough estimation of age.
Explanation:
Which process is a form of mechanical weathering apex
Physical weathering, also known as disaggregation or mechanical weathering, refers to the category of procedures, which makes the disintegration of rocks in the absence of chemical modification. In general, the mechanical weathering takes place due to the build-up of pressure within the rocks.
However, the rocks can also get worn away by a procedure known as abrasion. Abrasion refers to the disintegration of rocks due to friction.
The abrasion is a form of mechanical weathering apex.
Explanation:Abrasion is the breakdown of rock by friction.Mechanical weathering is disintegration of rocks due to physical forces without any chemical reactions.So abrasion is process of mechanical weathering.