Some types of the evidence, such as the fossils and the similarities between the related living organisms, were used by Darwin to develop his theory of the natural selection, and are still used by today. Others, such as the DNA testing, were they not available in Darwin's time, but are used by the scientists today to learn more about the evolution.
The Natural selection is the mechanism of the evolution. Organisms that are more adapted to their environment and are more likely to survive and they pass on the genes that was aided their success. This process was causes species to change and then diverge over time. Darwin used multiple lines of the evidence to support his theory of the evolution by the natural selection -- fossil evidence, the biogeographical evidence, and the anatomical evidence.
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Ibuprofen is a drug commonly used to relve inflammation and pain, it is a mixture of two enatiomes whicha re moldules that:_______.
Answer:
Зато хохлосвиней умеешь поддерживать , мерзавец. И глупую Украину, как Америка. Путин молодец!!! Америке скоро пипец будет , а Россия будет процветать.
Explanation: Такой же тупой америкос как те укры в Украине
Drugs that selectively stimulate contraction of the myometrium are known as _______________.
Drugs that selectively stimulate the contraction of the myocardium are known as oxytocic agents.
What is myocardium?The myocardium is the middle layer of the heart. It is the thickest layer between the single-layer endocardium and the outer epicardium. The myocardium is composed of cardiomyocytes.
The function of the myocardium is to facilitate the contraction and relaxation of the heart walls. It helps in the conduction of electrical stimuli.
Cardiac muscles are under to stimulate digoxin, dopamine. Cardiostimulatoy drug stimulate and enhances cardiac function increasing heart rate. Hypertension, Angina, myocardial infraction, and heart failure are some of the disorders related to the heart.
Therefore, Drugs that selectively stimulate the contraction of the myocardium are known as oxytocic agents.
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What happens if an enzyme is not functioning in a chemical reaction within a living organism that needs it?
If an enzyme is not functioning in a chemical reaction within a living organism that needs it the response continues, but very slowly.
Enzyme- Proteins called enzymes aid in accelerating our bodies' chemical processes, or metabolism. Some compounds are created, while others are broken down. Enzymes are a part of all living things.
Chemical Reaction- when two or more compounds mix to create a new substance, a chemical change takes place.
Metabolism- The chemical processes by which food is converted to energy in the body's cells are known as metabolism. In order for our bodies to move, think, and grow, they require this energy. The body's specific proteins regulate the chemical processes involved in metabolism.
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Which cell participates in cell-mediated immunity and is antigen specific and directly cytotoxic for target cell?
Th1 cells and Cytotoxic T cells participates in cell-mediated immunity and is antigen specific and directly cytotoxic for target cell.
What is an antigen?An antigen (Ag) is a molecule, molecular structure, foreign particle, pollen grain, or any other foreign substance that can attach to a particular antibody or T-cell receptor. An immunological response may be triggered by antigens present in the body. A chemical that produces antibodies was formerly referred to as an antigen. Antigens can be proteins, peptides (amino acid chains), lipids, nucleic acids, polysaccharides (chains of monosaccharides/simple sugars), or polypeptides.
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Semmelweis first promoted the use of disinfecting agents during surgery, such as the spraying of phenol in the operating room. True or false
Semmelweis first promoted the use of disinfecting agents during surgery, such as the spraying of phenol in the operating room. -FALSE
What are disinfectants?In the healthcare industry, a variety of disinfectants are employed either individually or in mixtures (for example, hydrogen peroxide and peracetic acid).Alcohols, chlorine and its derivatives, formaldehydes, glutaraldehydes, ortho-phthalaldehydes, hydrogen peroxide, iodophors, peracetic acid, phenolics, and quaternary ammonium compounds are some of these.These compounds are used in commercial formulations, which are distinct products that need to be registered with the EPA or approved by the FDA.Most of the time, a particular product has a certain application and should be utilised in a particular way.Users should thus carefully study labels to ensure that the right product is chosen for the intended usage and applied effectively.Disinfectants are not interchangeable, and using the wrong concentrations or the wrong ones can cost too much money.To learn more about disinfectants , refer to the following link:
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Suppose that an equal amount of each polysaccharide was placed in a landfill. which polysaccharide should last the longest before it is decomposed?
Cellulose polysaccharide should last the longest before it is decomposed.
Cellulose polysaccharide- A molecule called cellulose is made up of hundreds, and occasionally even thousands, of carbon, hydrogen, and oxygen atoms. The primary component of plant cell walls, cellulose, keeps plants rigid and erect. Although cellulose cannot be digested by humans, it is essential for the diet as fiber.
Fiber- Fruits, vegetables, legumes, and whole grains all include fiber, which the body cannot process. Cancer prevention may be aided by dietary fiber. Fiber, such as muscle fiber or nerve fiber, is a term used to describe tissue that is formed of long, threadlike cells in the body.
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That we may have to look for several causes contributing simultaneously to a case of biodiversity loss is evident in the study of?
A case of biodiversity loss is evident in the study of colony collapse disorder in honey bees.
Biodiversity- The diversity of animals, plants, fungi, and even microorganisms like the bacteria that make up our ecological landscape are all included in what is known as biodiversity. These many species and critters collaborate in complicated web-like ecosystems to keep things in balance and support life.
Colony- A collection of creatures belonging to the same species that coexist and communicate often. A colony is distinct from an aggregation, a group whose members do not communicate with one another. For example, An ant colony, for instance, is made up of ants that dwell near to one another for mutual reasons.
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how is ethics and politics related to environmental policy
How do cnidarians in the medusa form move
through the water?
A. the gastrovascular cavity fills with water and allows them to float
B. their tentacles spin causing a propeller motion
C. the tentacles move along the ocean floor like feet
D. water is brought into the gastrovascular cavity and then expelled which propels them forward
Answer:
Explanation:
The medusa is a free-swimming form; it moves by rhythmic muscular contractions of the bell, providing a slow propulsive action against the water. The other principal body type of the adult cnidarian is the polyp, a stalked, sessile (attached) form.
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In the fast block to polyspermy, binding of sperm opens up _________ channels, which depolarizes the egg membrane and _________.
Na+; prevents the entrance of any more sperm
In the fast block to polyspermy, binding of sperm opens up Na+ channels, which depolarizes the egg membrane and prevents the entrance of any more sperm.
What is the fats block to polygamy?The opening of Na+ channels in the egg plasma membrane is a quick stop to polyspermy. Na+ enters the egg cell and depolarizes its membrane. Additional sperm from fusing to the egg plasma membrane are prevented by this depolarization.How is polyspermy achieved?Altering the egg plasma membrane's electric potential causes a quick block to polyspermy. The ionic concentration of the egg is significantly different from that of its surroundings, and this membrane acts as a selective barrier between the egg's cytoplasm and the outer environment.What makes polyspermy block so crucial?A paternal excess of genome dosage in the endosperm causes aberrant seed development and seed abortion, therefore the polyspermy block in the central cell is crucial.To learn more about polyspermy visit:
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The hormone produced by the corpus luteum that is the primary ovarian hormone after ovulation is __?
The hormone produced by the corpus luteum which is the primary ovarian hormone after ovulation is progesterone.
Corpus luteum is a gland that is produced when an egg is released from the ovary. Progesterone hormone is produced by the corpus luteum as well as the adrenal glands and placenta. Ovulation occurs as a result of an increase in the luteinizing hormone. The corpus luteum is formed after the release of the egg which then produces progesterone hormone.
Progesterone is an important hormone in maintaining pregnancy which belongs to the class of estrogens as it prepares the uterus lining for the implantation of the fertilized egg. It also plays important role in lactation and fetal development. Progesterone is also involved in maintaining the secondary sex characteristics of females.
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Inorganic elements that are extracted from the soil by plants and passed up the food chain are known as?
Inorganic elements that are extracted from the soil by plants and passed up the food chain are known a Minerals.
Minerals are inorganic compounds that make up the majority of the soil solution; among those needed by plants for structure and control are nitrogen (N) and potassium (K).Plants nevertheless need inorganic salts, which they take up from the soil around their roots. These salts contain the elements phosphorus (in the form of phosphate), chlorine (as the chloride ion), potassium, sulphur, calcium, magnesium, iron, manganese, boron, copper, and zinc.Group of creatures arranged from producers to consumers in the food chain, as well as prey, predators, scavengers, and decomposers. food chain. noun. each connected food chain within an ecosystem. Likewise known as a feeding cycle.To learn more about Minerals.
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Which class of antidiabetic drugs inhibits alpha glucosidase and delays glucose absorption?
Alpha-glucosidase inhibitors are a class of antidiabetic drugs that inhibits alpha-glucosidase and delays glucose absorption.
Alpha-glucosidase inhibitors are abbreviated as AGIs. AGIs inhibit the absorption of carbohydrates in the small intestine by inhibiting the action of enzymes such as alpha-glucosidase. Alpha-glucosidase is an enzyme that converts complex carbohydrates (e.g. Starch) into simple absorbable carbohydrates like glucose. Other enzymes that perform a similar function include sucrase, maltase, glucoamylase, and isomaltase.
Acarbose is the most commonly used Alpha-glucosidase inhibitor taken orally. AGIs are initiated with a lower dosage taken three times with the meal. Acarbose inhibits the action of enzymes like alpha-amylase, maltase, sucrase, and dextranase.
Due to the action of AGIs to inhibit the carbohydrate converting enzymes, they are named so. And with this preference, AGIs are used to delay glucose absorption.
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A 1,200-kcalorie diet that is 15 percent protein supplies how many grams of protein?
A 1,200-kcalorie diet that is 15 percent protein supplies 180 kcalorie.
Formula to calculate the 15% protein supply,
[tex]\frac{1200 x 15}{100}[/tex] = 180 kcalorieProtein- Large, intricate molecules known as proteins serve a variety of vital functions in the body. They are crucial for the construction, operation, and control of a body's organs and tissues and carry out the majority of their job inside cells.
Tissue- Between cells and an entire organ, there is a biological organizing level called tissue. A tissue is a group of comparable cells from the same origin, along with their extracellular matrix, that work together to perform a single function. Then, various tissues are functionally grouped together to form organs.
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The trp and lac operons are regulated in various ways. how do bacteria regulate transcription of these operons?
Operon is not transcribed:
-lac operon: lactose absent
-trp operon: tryptophan present
Positive control transcription of Operon does not speed it up:
Lactose and glucose are present, -lac operon
Tryptophan is lacking in the -trp operon.
Operon is transcribed quickly through positive control:
-lac operon: lactose present, glucose not
Only negative control is used to regulate the trp operon. The operon genes are not transcribed when tryptophan is present.
Both positive control and negative control are used to control the lac operon.
Negative control: —Transcription is inhibited when lactose is missing due to the activity of the repressor protein.
—The repressor protein is deactivated and transcription is triggered when lactose is present.
Positive control: —In the absence of glucose, another regulatory protein (CAP) attaches to the lac operon's promoter, speeding up transcription in the presence of lactose.
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What is a possible rationale for the difference between the dna in chromatin and chromosome form?
A possible rationale for the difference between the DNA in chromatin and chromosome form is the structure of chromatin, loosely organized chromatin and condensed chromatin.
What is chromatin?Chromatin is a macromolecular structure composed of DNA and associated proteins called histones, which can be transcriptionally inactive (heterochromatin) or active (euchromatin).
The difference between chromosomes and chromatin is based on the level of organization, which is associated with diverse factors that make this structure dynamic for cell division and/or transcriptional activity.
In conclusion, possible rationales for the difference between the DNA in chromatin and chromosome form are associated with the structure of chromatin, loosely organized chromatin facilitates transcription and condensed chromatin keeps the DNA organized.
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Which part of the scientific method is best illustrated by the
ecologists wondering why the prairie dog populations are in
decline?
O collecting data from an experiment
O drawing conclusions based on data
O setting up an experiment
O making an observation and asking a question
Answer:
b drawing conclusions based on data
Mother teresa used her charisma to connect her ______ of serving the poor to the ______ of her followers.
Mother teresa used her charisma to connect her vision of serving the poor to the believe of her followers.
How can a leader emphasise the principles of their vision?Additionally, the appropriate terminology must be used while articulating a vision. A leader need to employ energising and exciting language and imagery (Sashkin, 2004; Zaccaro & Banks, 2001). A vision needs to be described in words that are reassuring, inspiring, and positive while yet undervaluing it.
The attitude, beliefs, and behaviours of the vision must be modelled by leaders. Values are concepts, opinions, and conduct that people deem to be desirable.
The vision of a leader is always complete.
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During which period of development is the unborn baby most at risk of developing a structural defect due to the effects of a teratogen, such as zika virus or lead?
During stage of development, an unborn child is most at risk of experiencing a structural defect as a result of exposure to a teratogen like the zika virus or lead
: embryonic period
What is the development of an embryo?
The first eight weeks of human embryonic development are referred to as embryonic development; from the start of the ninth week, the embryo is referred to as a fetus. The study of this growth in the first eight weeks following fertilization is known as human embryology. The average gestation (pregnancy) lasts 40 weeks, or nearly nine months.
Teratogens are substances or conditions that can lead to an embryo's deformity; these include alcohol, tobacco smoke, narcotics, maternal stress, and the age of the father. Due to the impact of teratogens, the unborn child is at a very high risk of acquiring structural problems during the embryonic stage. Teratogens can cause aberrant bone, muscle, and tendon growth.
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What affect does an increase in enzyme concentration have on the reaction rate?
Explanation:
Increase in enzyme concentration will provide faster metabolic reaction to the point of saturation of the enzymes active center.
Carolina was always hungry. after visiting the doctor, she was told that her _________ was producing too much insulin, causing low blood sugar.
Carolina was always hungry. after visiting the doctor, she was told that her pancreas was producing too much insulin, causing low blood sugar.
What insulin is used for?Human insulin is used to control blood sugar in people with type 1 diabetes, a condition in which the body cannot produce insulin and cannot, therefore, control the amount of sugar in the blood, or type 2 diabetes, a condition in which the blood sugar is too high because the body cannot produce or use insulin normally, and which cannot be controlled by oral medications alone. The hormones class of drugs includes human insulin. In place of the insulin that the body ordinarily produces, human insulin is used.
Is insulin the same as sugar ?Insulin then aids in transferring the blood's sugar to your cells. Your cells either immediately use the sugar that enters them as fuel for energy, or they store it for later use. Insulin malfunctions occur in people with diabetes.
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True of false. mobility is the range of movement a joint can move while stretching.
True, mobility is the range of movement a joint can move while stretching.
Movement- Movement is the act or condition of moving the location or orientation of the body or a bodily part from one position to another. One of the key characteristics of living things is movement. Amoeboid, ciliary, and muscular motions are the three basic categories of movement.
Joint- The area of the body where two or more bones unite to allow for movement is known as a joint. Every bone in the body has at least one joint where it joins another bone, with the exception of the hyoid bone in the neck. A joint's function determines its form. The term "articulation" can also refer to a joint.
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What advantages is there to knowing the phases of the moon
During a Moon's monthly cycle, there are eight phases: four major phases and four intermediate phases.
But why, exactly, does the moon have phases?
It's required to comprehend two crucial things in order to respond to this question.
Firstly, the moon orbits once every 29.5 days around the Earth. Second, the moon is illuminated by the sun at various angles as it travels around the globe.
Our predecessors had strong opinions on how the moon influenced people's actions.
Find out how...
Oceans, Gravity, and Vegetation:
The idea that the moon affects plant growth is supported by more than 200 research articles.
The gravitational pull of the moon affects tides. Researchers have recently investigated it to find out if the moon cycle affects the Arabidopsis thaliana plant. According to the results, the plant's roots grow in cycles that closely resemble the time of the moon's orbit.
Ancient wisdom and human behavior:
More evidence supporting the old belief that the moon can affect human conduct is provided by episodes of increased criminal activity and sleep loss.
Natural forces:
Again, it is entirely plausible that the electromagnetic fields that surround the earth and people, as well as the moon, can affect our behavior. It has been experimentally demonstrated that changes in electromagnetic fields can alter the circadian clocks of fruit flies.
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The surfaces of the inner, terrestrial planets of our solar system are composed of ________.
The surfaces of the inner, terrestrial planets of our solar system are composed of volcanoes, craters, canyons, and mountains.
The interstitial planets are made up of rocks, silicates, minerals, carbon or in case of earth water as well. Generally the planets have an inner core made up of iron which is further surrounded by a mantle.
Our earth is the only planet in the universe which is found to have water at its surface while the planet Mars also has polar ice caps which are permanent just like our earth. The inner terrestrial planets consist of mercury, Venus, earth, and Mars.
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An individual who studies the scientific links between biological and psychological processes is known as a _______.
Those that investigate the scientific relationships between biological and psychological processes are referred to as:
biological psychologist
The investigation of the rational relationships between biological and psychological processes is known as biological psychology.
Biological psychology is the study of the interaction between biological and psychological functioning. The brain and spinal cord are the decision-making organs of the central nervous system (CNS).
Examine how the human body and its organs are made and function. This is something that both psychology and the biological sciences do. Psychology examines behavior. The relationship between a person's body and conduct is very strong. Skeletal muscle contractions or glandular secretions follow the physiological level of all sorts of activity, including sensations, perceptions, and actions.
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Sesamoid bones are small bones that develop in tendons for protection against wear and tear.
A. true
B. false
Small bones called sesamoid bones form in tendons as a form of wear and strain resistance. false
What is a sesamoid bone?
A sesamoid bone is a tiny bone that is frequently seen embedded within a muscle or tendon near joint surfaces. These bones act as pulleys to relieve stress on the specific muscle or tendon they are located within.
False as sesamoid bone is a pulley to alleviate stress on the tendon its connected to. It doesn't provide any sort of protection.
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Describe each of the cycles in nature. Identify where each cycle is found, how organisms use them, and what key words relate to them.
The correct answer is four cycles are (1) The Water Cycle or Hydrologic Cycle (2) The Carbon Cycle (3) The Nitrogen Cycle (4) The Oxygen Cycle.
The hydrologic cycle is the continuous movement of water in the Earth-Atmosphere system. The water cycle is defined as the movement of water from the ground to the atmosphere and back again.
The carbon cycle describes the movement of carbon from the atmosphere to soils, living creatures, the ocean, and human sources.
The Nitrogen Cycle is a biogeochemical process in which nitrogen is converted into various forms before passing from the atmosphere to the soil to the organism and back into the atmosphere.
The entire cycle can be summarized as follows: the oxygen cycle begins with photosynthesis in the presence of sunlight, releases oxygen back into the atmosphere, which humans and animals breathe in oxygen and breathe out carbon dioxide, and then links back to the process of photosynthesis.
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Rings of muscle in the digestive tract that can open and close, regulating the movement of food into or out of parts of the digestive system, are:________
The ring of the muscle in the digestive tract, which can open and close, or regulate the movement of food into or out of parts of digestive system, is the pyloric sphincter.
Although the pyloric sphincter is present at the bottom of the stomach, and it is a muscular valve that opens to allow the food materials to pass from the stomach to the top of the small intestine of our digestive system.
Therefore, The pyloric sphincter serves as a type of gateway between stomach and small intestine, and It allows the contents of the stomach like food materials to pass into the small intestine. Also, It prevents digestive juices or partially digested food from re-entering into the stomach.
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Vertebrate species of animals are estimated to be outnumbered by invertebrate species by a ratio of approximately ___:____ (
According to estimates, there are roughly 1: 30 invertebrate species for every one vertebrate species.
What is vertebrate?
An animal having a backbone is called a vertebrate.
What is invertebrate?
An animal which doesn't have a backbone is called a invertebrate.
According to estimates, there are roughly 30 invertebrate species for every one vertebrate species. Ratio is 1:30.
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Darwin called the units of inheritance that pass traits from parents to offspring.
The units of inheritance that pass traits from parents to offspring as gemmules.
What is Darwin's theory of evolution?The biological evolution via natural selection idea was put out by British biologist Charles Darwin. According to Darwin, evolution is the process through which species change over time, give rise to new species, and descend from a single ancestor.
Natural selection is the theory of evolution put forward by Charles Darwin. Given the scarcity of resources in nature, animals with heritable features that promote survival and reproduction will often produce more offspring than their contemporaries, leading to a rise in the frequency of such traits across successive generations.
Populations change throughout time through natural selection, becoming increasingly adapted to their surroundings. Natural selection is reliant on the environment and necessitates the presence of heritable variation within a population.
Therefore, the units of inheritance are called gemmules.
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