Answer:
c
Explanation:
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Pepsin, a common enzyme found in the stomach, is most active at pH values between 0.5 and 2.5. It works slowly between pH values of 2.6 and 3.4. Beyond a pH of about 3.5, it becomes completely inactive. Why does this happen?
B) The proteins chain in the enzyme is denatured, permanently inactivating it as the pH approaches
Pepsin is most active at pH values between 0.5-2.5 because it is the optimum pH range for this enzyme. As the pH increases or decreases beyond this limit, the activity of the enzyme decreases.
What is Optimum Condition?An optimum is the condition or extent of something to which an enzyme shows maximum activity. This range shows highest rate of chemical reaction, any disturbance in this range decreases the rate of a chemical reaction.
Each enzyme has a particular range of temperature, pressure, and pH at which it shows maximum activity. In case of pepsin, the optimum range of pH is between 0.5-2.5. At this range, maximum activity is observed. When the pH of solution is increased to 3.5, the proteins present in the enzyme denature which results in complete inactivity.
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You are a scientist working on geological dig. You discover a rock layer that contains 50 grams of a substance known to have a half life of 50,000 years. 50% of the substance is parent material and 50% of the substance is daughter material. How old is the rock layer in which you found this substance?
What is the difference between animal and plant cell cytokinesis?
A. Plant cells form a cell wall between the daughter cells.
B. Animal cells create two unequal daughter cells.
C. Plant cells pass on only half of their genetic material.
D. Plant cells have a cleavage furrow.
Answer:
This would be the correct answer. The only main difference between animal cell cytokensis vs plant cell cytokensis is the cell wall that animal cells lack. Animal cells get pinched into two daughter cells, by the cleavage furrow in the cell membrane, while the plant cell has to form a cell plate before it can create daughter cells.
Explanation:
Suppose earth landmasses someday all move together. Describe the changes that will occur in earths oceans in earths land masses. Use the map and the theory of plate tectonics to explain your ideas.
what term describes the difference in elevation between the lowest and highest parts of an area?
when a non native species is imported into a new ecosystem the population sometimes runs wild. explain why this might be the case
Well, there are a few explanations to this questions that could be right, but let's go to the obvious one.
What can happen sometimes is that, when a new species is imported into a new ecosystem, it can cause some problems. For example, a plant is imported from Japan to Brazil and it is planted in the soil of a forest. This plant can either adapt to the environment or die because it's missing nutrients from Japanese soil. If this plant adapts, it can happen to in a way that this plant will take place of plants that usually were growing right there, taking their resources to grow up more and more, spreading fastly too. That is a process that can happen, it's a possibility, but, there's a very big chance of this happening in reality.
We can either mention the example of an animal, it's easier to understand, if we put a new animal into a new environment, it can go wild because this animal can start eating other animals, and that can cause a serious problem for their population, since it's going to start growing faster and faster, and once this happens, it'll will reach a limit line, and that line is the line of competition for food.
Explain what would happen if plankton were removed from the marine food webs.
which of the following are examples of matter? select all correct answers a. heat b.sunlight c.water d. grass e. air
In the given options, water, grass, and air are examples of matter, while sunlight and heat are not as they are forms of energy not substances with mass and volume.
Explanation:The examples of matter from the options you provided - heat, sunlight, water, grass, and air - include water, grass, and air. Matter is any substance that has mass and takes up space. This includes atoms and anything made up of atoms, like water molecules and nitrogen or oxygen molecules in the air. Grass, being a living organism, also consists of matter as it's made up of cells, which are composed of atoms.
Sunlight and heat, on the other hand, are forms of energy and not matter. Sunlight is a type of electromagnetic wave and heat is energy in transit, usually being transferred from a warmer object to a cooler object. These do not have mass or occupy space, so they are not considered matter. By understanding the definition of matter, one can better identify examples of it in everyday life.
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In your list, water, grass, and air are examples of matter as they have mass and occupy space. Heat and sunlight are not matter, they are forms of energy. therefore, option c,d and e are correct
Explanation:The examples of matter from your question are c. water, d. grass, and e. air. Matter is anything that has mass and takes up space, which includes all solids, liquids, and gases. Water is a liquid form of matter, grass is a solid, and air, even though it's invisible, is a gaseous form of matter. Heat and sunlight, however, are not considered matter but forms of energy.
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From your knowledge about the distribution of electrons in the levels and from the atomic number (in parentheses), indicate the most likely charge on the ion when this atom forms an ion. (Remember the 2, 8, 18 level distribution.)
Hydrogen (1)
0
-1
+1
-2
+2
The Answer is C.+1
Cause i said +2 and i got it wrong and this is the right answer
Animal cells contain all of the following structures EXCEPT a
A) nucleus.
B) cell wall.
C) mitochondria.
D) Golgi apparatus.
what are some similarities and differences between the G1 and S stages of interphase?
Final answer:
The G1 phase of interphase is primarily focused on cell growth and preparing the necessary components for DNA replication, with no visible change under the microscope. The S phase is where DNA replication occurs, producing two identical sister chromatids for each chromosome and duplicating centrosomes. Both are preparation steps for cell division, but they differ in function; G1 accumulates resources, while S utilizes them to replicate DNA.
Explanation:
The G1 phase and S phase are both crucial stages in interphase of the cell cycle. During the G1 phase, also known as the first gap, the cell is metabolically active, increasing in size and synthesizing proteins while accumulating the necessary building blocks of chromosomal DNA. Little change is visible under a microscope during this phase; however, the cell prepares for DNA replication by accumulating the necessary materials and energy reserves.
The S phase (synthesis phase) is when DNA replication actually occurs. Each chromosome's DNA is duplicated to form two sister chromatids, attached at the centromere. The cell also duplicates its centrosomes, which are important for mitotic spindle formation during the subsequent mitosis. This phase is essential as it ensures that each new cell will receive an identical set of genetic information.
While both phases are part of interphase and are preparation steps for cell division, their key functions differ. The G1 phase focuses on growth and preparation for DNA synthesis, whereas the S phase is where the actual replication of DNA and centrosomes takes place. Additionally, G1 phase is about accumulating resources and the S phase is about utilizing those resources to synthetize a complete copy of the cell's DNA.
Talking about all things lunar, which of these forms of madness is related to the moon?
A) Hysterica
B) Lunacy
C) Insanity
D) Biebermania
Answer;
B) Lunacy
Lunacy is the common form related to madness
Explanation;
-Belief in the “lunar lunacy effect,” also sometimes referred to as the Transylvania effect, persisted in Europe through the Middle Ages, when humans were widely reputed to transmogrify into werewolves or vampires during a full moon.
Which system is responsible for respiration in frogs?
Lungs
Tracheae
Skin
Gills
When nuclear power is harnessed, it is captured in the form of _____. steam that turns a turbine electrons that escape through a steel funnel heat that conducts over plastic tubing X-rays
Answer:
steam that turns a turbine
Explanation:
Answer:
When nuclear power is harnessed, it is captured in the form of _____.
heat that conducts over plastic tubing
steam that turns a turbineX-rays
electrons that escape through a steel funnel
Explanation:
Many bacteria are able to pass small pieces of the hereditary information on their DNA from one bacterial cell to another. This can sometimes result in an increase in the number of drug-resistant bacteria. What name is given to the process by which one bacteria transfers DNA to another
Answer:
The correct answer is: conjugation.
Explanation:
Bacteria are organisms capable of exchanging information with other individuals of their species, and they can do so through many mechanisms.
Conjugation is one of the ways in which bacteria can exchange information.
Conjugation refers to the transfer of DNA thanks to the direct contact between two bacteria and is mediated by plasmids (DNA molecules that are not chromosomal and locate in the bacterium's cytoplasm).
The conjugative plasmid resides in the donor cell. This donor cell produces a sex pilus that attaches to the recipient cell and thus they communicate to transmit the DNA from the donor to the recipient.
This process has clinical relevance since conjugation may increase the number of drug-resistant bacteria.
How does the body respond to changes in its environment
Answer:
Receptors are groups of specialised cells. They detect a change in the environment stimulus. In the nervous system this leads to an electrical impulse being made in response to the stimulus. Sense organs contain groups of receptors that respond to specific stimuli.
In what point during the digestive process does your body begin to receive energy from the food?
Small intestine is point during the digestive process does your body begin to receive energy from the food.
What is Small intestine?
Between the stomach and the large intestine, also known as the colon or large bowel, is a specially designed tubular structure known as the small intestine that is responsible for absorbing the nutrients from your meals.
Its length is roughly 20 to 25 feet, and its circumference is comparable to your middle finger. The duodenum, jejunum, and ileum are its three segments.
The duodenum, which is the first segment of the small intestine, starts at the stomach's pylorus and loops around the pancreas before joining the jejunum in the left upper section of the abdominal cavity.
Therefore, Small intestine is point during the digestive process does your body begin to receive energy from the food.
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This is a molecule that contains both amino and carboxylic acid functional groups. They are the building blocks of protein.
The answer is . Amino Acids
Two descriptions about physical quantities are given below: Quantity A: It has the same unit as force. Quantity B: It measures the amount of matter in an object. What quantities are these most likely describing?
Both Quantity A and Quantity B are mass.
Both Quantity A and Quantity B are forces.
Quantity A is weight and Quantity B is mass.
Quantity A is mass and Quantity B is weight.
I don't think it is b or d.
Quantity A is weight and quantity B is mass. So the correct option is C.
What is weight?
Weight is the gravitational pull of a second, much larger object, such as the Earth or Moon, on a first object. The universal law of gravity states that any two things will attract each other due to their masses with a force exactly proportional to the product of their masses and inversely proportional to the square of the distance between them.
This law is the source of weight. As a result, larger items naturally weigh more when placed in the same spot; yet, the weight of an object decreases the more it is from the Earth.
Therefore, the correct option is C.
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Of course! I'd be happy to provide a more detailed explanation. Quantity A: It has the same unit as force.This statement suggests that Quantity A is a physical quantity that is measured using the same unit as force. In the International System of Units (SI), the unit of force is the Newton (N). The Newton is a derived unit that represents the amount of force required to accelerate a one-kilogram mass at a rate of one meter per second squared. Quantity B: It measures the amount of matter in an object. This statement indicates that Quantity B is a physical quantity that is used to measure the amount of matter present in an object. The quantity that measures the amount of matter is called mass. Mass is a fundamental property of matter and is independent of the object's location or the force acting upon it. In the SI system, the unit of mass is typically measured in kilograms (kg). Based on these descriptions, we can determine the most likely quantities being described: Both Quantity A and Quantity B are mass. This option suggests that both Quantity A and Quantity B are referring to mass. It aligns with the statement that Quantity B measures the amount of matter in an object, as mass is the quantity that precisely does that. However, it contradicts the statement that Quantity A has the same unit as force, as force is measured in Newtons, not kilograms. Therefore, this option can be eliminated.Both Quantity A and Quantity B are forces. This option implies that both Quantity A and Quantity B are forces. However, the description of Quantity B as a quantity that measures the amount of matter in an object does not align with the concept of force. Force is a push or pull exerted on an object, while mass is the quantity that measures the amount of matter. Therefore, this option can be ruled out. Quantity A is weight and Quantity B is mass.This option suggests that Quantity A is weight and Quantity B is mass. Weight is a force that is dependent on an object's mass and the strength of the gravitational force acting on it. It is measured in Newtons, which is the same unit as force. Quantity B is described as measuring the amount of matter in an object, which aligns with the concept of mass. Since weight is a force and has the same unit as force, this option is correct. Quantity A is mass and Quantity B is weight.This option suggests that Quantity A is mass and Quantity B is weight. However, this contradicts the statement that Quantity A has the same unit as force, as mass is not measured in Newtons. Additionally, Quantity B is described as measuring the amount of matter in an object, which aligns with the concept of mass, not weight. Therefore, this option can be eliminated.In summary, based on the given descriptions, Quantity A is weight and Quantity B is mass. Weight is a force that has the same unit as force (Newton), while mass is a measure of the amount of matter in an object, typically measured in kilograms. Therefore, option C is your answer. If you have any further questions, feel free to ask!
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Describe the eye of a hurricane
heat rising in a hot-air balloon is an example of _____ A. conduction B. convection C. radiation D. solar. IF YOU GET IT RIGHT YOU CAN GET BRAINLIEST, FAN, ETC. JUST TELL ME
Answer: Convection
Explanation: Heat rising in a hot-air balloon is an example of ( convection). I just took test I got it right
Heat rising in a hot-air balloon is an example of convection. So, the correct option is (B).
What is Convection?Convection is defined as single or multiphase fluid flow which occurs spontaneously due to the combined effects of physical property heterogeneity and body forces on the fluid, such as density and gravity.
This is also define as the transfer of heat by the movement of a fluid which can be liquid or gas between areas of different temperature. It may be natural or forced which involves a bulk transfer of portions of the fluid.
There are two types of convection which are as follows:
Natural convectionForced convectionSome examples of Convection like hot air rising above a fire, ice melting. Sea breeze or land breeze which is caused by a difference in pressure, blood circulation in warm-blooded animals.
Thus, Heat rising in a hot-air balloon is an example of convection. So, the correct option is (B).
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The alleles for a given trait seperate during meiosis is known as
Answer:
Mendels' first law. The Law of Segregation states that the two alleles of a given gene will be separate from one another during gamete formation (meiosis). law of independent assortment. the law that states that genes separate independently of one another in meiosis when forming gametes. dominant allele.
Explanation:
What was the role of technology in discovering the cell theory and why was it important
Technology, and specifically the advancement of microscopes, was fundamental in discovering and understanding the Cell Theory. Microscopes allowed the first observation of cells by Robert Hooke, and further refinements like the electron microscope revealed intricate cellular structures that deepened our understanding of biology.
Technology, particularly the invention and refinement of microscopes, played a crucial role in the development of the Cell Theory. In the 1660s, Robert Hooke was the first to describe cells by observing cork with a microscope he had refined. Following him, Anton van Leeuwenhoek utilized his self-crafted microscopes to observe and describe microorganisms, which established the existence of microscopic life.
The advancements in microscopy over the years, notably the transition from light microscopes to electron microscopes in the 1950s, revealed intricate details of the cellular structure that were previously invisible. This leap in microscopy was instrumental for scientists, who, leveraging the enhanced resolution, could observe tiny structures within cells, and even individual molecules and atoms. It was these technological advancements that confirmed the fundamental tenets of the Cell Theory postulated by scientists like Theodor Schwann and Matthias Jakob Schleiden, who proposed that all living things are composed of cells, and Rudolf Virchow, who later asserted that cells only arise from pre-existing cells.
Microscopes not only aided in the discovery of cells but also propelled the field of biology into the molecular era, giving rise to cell biology as a distinct field of study. With the electron microscope, our understanding of cell biology deepened, making significant contributions to medicine, genetics, and various branches of biology.
In sexual reproduction, parental _______ fuse to form a daughter cell.
A. Genes
B. DNA
C. Gametes
D. None of the above
Identify all of the sinks for the CO2.
Answer:
The main natural carbon sinks are plants, the ocean and soil. Plants grab carbon dioxide from the atmosphere to use in photosynthesis some of this carbon is transferred to soil as plants die and decompose. The oceans are a major carbon storage system for carbon dioxide.
Explanation:
i know im very late but thats the answer
What does autosomal recessive, autosomal dominant and sex-linked mean?
Autosomal recessive inheritance requires two recessive alleles to express a trait, whereas autosomal dominant inheritance requires only one dominant allele.
The terms autosomal recessive, autosomal dominant, and sex-linked refer to different patterns of genetic inheritance.
Autosomal recessive inheritance means that a trait is linked to a gene on one of the non-sex chromosomes (autosomes), and two copies of the recessive allele (homozygous recessive) are needed for an individual to express the trait.In autosomal dominant inheritance, only one copy of the dominant allele is needed for expression of the trait, so affected individuals can be either homozygous dominant or heterozygous.Sex-linked inheritance, often X-linked, means the gene causing the trait is located on a sex chromosome, typically the X chromosome. X-linked recessive disorders are more common in males (XY) because they only have one X chromosome, and a single recessive allele will express the trait. Females (XX), on the other hand, must inherit two recessive alleles to express the trait; otherwise, they are carriers if they inherit one recessive allele.X-linked recessives are expressed in males who inherit only one X chromosome while females must inherit recessive X-linked alleles from both parents to express the trait. This is exemplified by conditions such as red-green color blindness and hemophilia.
what molecule absorbs sunlight for photosynthesis
The primary molecule responsible for absorbing sunlight and initiating the process of photosynthesis is chlorophyll.
What is photosynthesis?Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose or other sugars. The primary molecule responsible for absorbing sunlight and initiating the process of photosynthesis is chlorophyll.
Chlorophyll is a pigment found in the chloroplasts of plant cells, as well as in the thylakoid membranes of algae and certain bacteria. It absorbs light in the blue and red wavelengths and reflects green light, which is why plants and other photosynthetic organisms appear green. The energy absorbed by chlorophyll is used to drive the synthesis of glucose and other sugars from carbon dioxide and water, a process called carbon fixation. Other pigments, such as carotenoids and phycobilins, also contribute to the absorption of sunlight in photosynthetic organisms.
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A catastrophe changed the climate of an area, causing a number of species to become extinct in a short period of time. A few new species evolved in the short period of time and were well adapted to the new climate. If documented this would provide evidence for
Help ASAP!!!PLZ Which of the following could result from an algal bloom in a river?
A) The algae purify the water
B) the local plants produce flowers early
C) fish and other aquatic life die off
D)plant and animal pop increase
What is the result when a single cell reproduces by mitosis?
Answer:
two cells with genetic material identical to the parent cell
Explanation: