A change in allele frequencies in a set of organisms over time is called __________.

Answers

Answer 1
Microevolution

Microevolution is the change in the allele frequencies within a set of organisms (population) over time primarily due to four processes namely, mutation, natural and artificial selection, gene flow, and genetic drift

The term "microevolution" is coined to differentiate it from "macroevolution," which occurs over much longer periods of time and results in greater differences in the characteristics of the organisms in the population. 

Related Questions

Organisms are taxonomically classified based on structural and genetic characteristics. Chimpanzees, or Pan troglodytes, are hominids found mainly in equatorial Africa. Chimpanzees are unique in that, similar to humans or Homo sapiens, they sometimes use tools to complete tasks such as obtaining certain kinds of food. Which of the following levels of taxonomic classification do humans and chimpanzees not have in common? A.class B.phylum C.family D.species

Answers

D. species.. humans and chimps are not the same species.

The correct answer is D. Species

Explanation:

According to taxonomy, Homo sapiens and Chimpanzees derive from a common ancestor and therefore share common features as well as different levels of taxonomic classification, this includes the Kingdom that in both is Animalia as both are animals, the Phylum that is Chordata as they are both vertebrates and the Family that in both is Hominidae as they are classified either as hominids or apes. However, they are not from the same species, because this is one of the most specific levels and it is defined by organisms being able to produce fertile offspring which is not possible between chimpanzees and humans, in this way the species of chimpanzees is Pan troglodytes and the species in humans is Homo Sapiens.

The hormone found only in pregnant women that, when detected, confirms pregnancy is

Answers

Human chorionic gonadotropin hormone (hCG)

This hormone is produced by a woman only during pregnancy and is responsible for "pregnancy symptoms," such as vomiting and nausea.

It is primarily produced by the placenta shortly after the dividing fertilized egg cell (embryo) attaches or implants itself into the uterine lining (endometrium). This occurs a few days after the woman has conceived. 

Things like your eye color and height are not under your control. This is because they are determined by your genes. So, eye color is a good example of an inherited __________. A) estate B) gene C) height D) trait

Answers

Answer:trait

Explanation:

Things like the eye color and height are not under the control because they are determined by the genes. So, eye color is a good example of an inherited trait that is in Option D.

What is a trait?

A trait is a distinguishing characteristic or quality that is determined by an individual's genes or genetic makeup. Traits can include physical characteristics such as eye color, height, and hair color, as well as behavioral traits like shyness or outgoingness. Inherited traits are those that are passed down from parents to their offspring through genetic material like DNA. Eye color is a good example of an inherited trait because it is determined by multiple genes inherited from both parents and cannot be changed by personal choices or external factors.

Hence,  So, eye color is a good example of an inherited trait that is in Option D.

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Which term refers to the relative amounts of fat and lean tissue in the body?

Answers

Hey there,
The answer to your question is Body Composition
Body composition also determines leanness 

Hope this helps :))

~Top

Body composition refers to the term that refers to the  relative amounts of

fat and lean tissue in the body

Body composition refers to the amount of fats, bone, water and lean

tissue(muscles) in the body. It is often used to calculate the weight of an

individual.

Body composition is also used by Doctors to determine if a person is healthy or not as the percentage of fat in the body mass will help to determine that.

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Greenhouses are used to allow plants to grow during winter months. How does a greenhouse increase the growth of plants?

Answers

It helps with the plants health. The glass traps the heat.

Answer:

It increases the energy available to plants.

Explanation:

Where does a nurse expect to hear bronchovesicular lung sounds in a healthy adult?

Answers

During the examination of a patient suffering with a lung or respiratory disease, a nurse is expected to hear different types of sounds coming from different parts of the lungs. The sound can be crackled, broken, high-pitched, medium-pitched, etc.
A nurse is expected to hear a bronchovesicular lung sound NEAR THE STERNAL BORDER in a healthy adult.

Bronchovesicular lung sounds are normally heard over the major bronchi between the first and second intercostal spaces anteriorly and between the scapulae. During auscultation, a nurse uses a stethoscope, after cleaning it and positioning appropriately, to listen for these healthy lung sounds in a patient.

A nurse expects to hear bronchovesicular lung sounds in a healthy adult between the trachea and the upper part of the lungs near the spine. These sounds represent the medium pitch breath sounds that emanate from the larger airways, where the sounds of air moving through the bronchial tree and alveoli are approximately equal. During the process of auscultation, the nurse uses a stethoscope to listen to lung sounds. Specific areas where bronchovesicular sounds are typically heard are over the major bronchi, usually between the first and second intercostal spaces anteriorly near the sternum, and between the scapulae (shoulder blades).

The auscultation starts by ensuring that the equipment is clean and ready. The stethoscope earpieces are rotated slightly anterior, and with the diaphragm positioned on the triangle of auscultation, an area medial to the inferior angle of the scapula, the nurse listens for these normal lung sounds.

can someone reword this for me plsss <333333

Transmission electron microscope - The transmission electron microscope uses electrons instead of light. a light microscope is limited by the wavelength of light. TEMs use electrons as "light source" and their much lower wavelength makes it possible to get a resolution a thousand times better than with a light microscope. The possibility for high magnifications has made the TEM a valuable tool in both medical, biological and materials research.Compound light microscope - Microscope with more than one lens and its own light source. There are ocular lenses in the bonicular eyepieces and objective lenses in a rotating nosepiece closer to the specimen. To ascertain the power of magnification of a compund light microscope, it's needed to take the power of the objective lens and multiply it by the eyepiece which is generally 10x. Although sometimes found as monocular with one ocular lens, the compound binocular microscope is more commonly used today. The first light microscope dates back to 1595, when Zacharias Jansen created a compound microscope that used collapsing tubes and produced magnifications up to 9X.

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Transmission electron magnifying lens - The transmission electron magnifying instrument utilizes electrons rather than light. a light magnifying lens is constrained by the wavelength of light. TEMs utilize electrons as "light source" and their much lower wavelength makes it conceivable to get a determination a thousand times superior to with a light magnifying lens. The likelihood for high amplifications has made the TEM a significant instrument in both medicinal, natural and materials research.Compound light magnifying instrument - Microscope with more than one focal point and its own particular light source. There are visual focal points in the bonicular eyepieces and target focal points in a turning nosepiece nearer to the example. To determine the energy of amplification of a compund light magnifying instrument, it's expected to take the energy of the target focal point and duplicate it by the eyepiece which is by and large 10x. Albeit at times found as monocular with one visual focal point, the compound binocular magnifying lens is all the more regularly utilized today. The principal light magnifying lens goes back to 1595, when Zacharias Jansen made a compound magnifying instrument that utilized crumbling tubes and delivered amplifications up to 9X.

______represents the presence of the rhesus protein on blood.

Answers

The answer is Rh Factor.

The sound of the old man's heart most likely symbolizes ____________.

Answers

If this is talking about Edgar Alan Poe's Tell-Tale Heart poem then the beating heart would symbolize the narrator's guilt or sense of wrong doing

The sound of the old man's heart most likely symbolizes narrator is tormented by the sound of his own heart beating.

What is sound?

Sound is defined as a vibration that travels through a transmission medium, such as a gas, liquid, or solid, as an acoustic wave.

It can also be defined as a mechanical disturbance that spreads through an elastic material medium and disrupts an equilibrium condition.

Sound is crucial because it engages viewers, aids in information delivery, boosts production value, elicits emotional reactions, highlights what's on screen, and is utilized to convey mood.

Amplitude, wavelength, period, frequency, and speed or velocity are the five properties of sound.

To prevent the transfer of sound energy from one environment to another, assembly materials are separated also known as decoupled.

Thus, the sound of the old man's heart most likely symbolizes narrator is tormented by the sound of his own heart beating.

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In photosynthesis what substances come in from the outside

Answers

Sunlight CO2 and Water

Final answer:

Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants. These substances combine to produce glucose and oxygen. Carbon dioxide is obtained from the atmosphere, and water is absorbed by the roots of the plant.

Explanation:

Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants. During the process, these substances combine to produce glucose, a carbohydrate, and oxygen as a waste product. Carbon dioxide is obtained from the atmosphere through diffusion, while water is absorbed by the roots of the plant. Sunlight is absorbed by chlorophyll in the chloroplasts of the leaf cells, where photosynthesis takes place.

Why is chemical weathering rapid in the tropics?

Answers

Tropical areas tend to experience more rapid weathering because large amounts of consistent rainfall and constantly warm temperatures increases the rates ofchemical weathering. ... Humid tropical regions are also nearer to the equator so high temperatures and faster rates of chemical reaction can take place.

F a drug has the side effect of inhibiting osteoblast activity, how may taking this drug impact the patient's skeletal system?

Answers

by causing defects and or malfunctions

During the course of successful prenatal development, a human organism begins as a(n) _____ and ends up as a(n) _____.

Answers

The correct answers are zygote and fetus. This is correct because the initial joining of the sperm and the egg is called the zygote. The zygote is the first step in prenatal development that grows and transforms over months into the final form, a fetus. The fetus is the last form of the zygote prior to birth.
Final answer:

Throughout prenatal development, a human organism begins as a zygote and becomes a newborn. The fetus stage spans from the ninth week of gestation until birth, during which vital development and differentiation occur.

Explanation:

During the course of successful prenatal development, a human organism begins as a (n) fertilized egg (zygote) and ends up as a (n) newborn. Throughout prenatal development, specifically starting from the ninth week of gestation, the organism is referred to as a fetus. This is an important stage in human development that continues until birth, marked by immense cell growth and the differentiation necessary to fully develop the structures and functions of the immature organ systems that were formed during the embryonic stage.

The entire prenatal journey encompasses several stages, starting with the germinal stage immediately after fertilization, proceeding through to the embryonic stage which lasts until the eighth week, and finally entering the fetal stage from the ninth week to birth. Significant development occurs during these stages, including sexual differentiation within the fetal period, organogenesis, and other crucial processes. The result of this intricate process is the birth of a human capable of survival outside the womb.

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How are chemical equations of photosynthesis and cellular respiration similar or different ?

Answers

The chemical equations of photosynthesis and cellular respirations are similar because the equations are opposite from each other.

Final answer:

Photosynthesis and cellular respiration are opposite processes that form the carbon-oxygen cycle, with the former producing glucose and oxygen, and the latter using these compounds to release energy. Both involve similar cellular features, such as electron transport chains and ATP generation.

Explanation:

The chemical equations of photosynthesis and cellular respiration are similar in that they are essentially the opposite of each other. Photosynthesis converts light energy into chemical energy and produces glucose (C6H12O6) and oxygen (O2) as its products. Cellular respiration, in contrast, uses glucose and oxygen to release stored energy, producing carbon dioxide (CO2) and water (H2O) as waste products. This creates a cycle where the products of one process become the reactants of the other, known as the carbon-oxygen cycle.

Additionally, both processes share similarities in cellular features and processes, including the use of electron transport chains and the generation of ATP (adenosine triphosphate). In this cycle, the mitochondria are involved in cellular respiration, while chloroplasts are involved in photosynthesis.

A toothpick found in a pizza is an example of what type of contamination

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A tooth pick found in a pizza is an example of PHYSICAL CONTAMINATION.
When it comes to food preparation, there are three types of food contamination, these are physical, chemical and biological contamination.
A physical contaminant is anything that is seen in food and is not part of that food. Example of this if hair or toothpick found in food. Chemical contaminants refer to chemicals which are mistakenly added to food while biological contaminants refers to microbes which are introduced into food.

A toothpick in a pizza represents contamination by adulteration with foreign bodies, with foreign bodies referring to non-food substances that contaminate food. This type of contamination can pose a physical hazard to consumers.

A toothpick found in a pizza is an example of adulteration by foreign bodies, which is one type of food contamination. Foreign bodies are substances or particles that are not meant to be in food. This can include a variety of items such as metal fragments, glass, wood splinters (like toothpicks), bone fragments, and plastic pieces.

Adulteration with foreign bodies can occur at any point in the food preparation and service chain, from production to serving. In the specific case of a soup container forgotten in the refrigerator showing contamination, the contaminants are likely from microbial growth due to spoilage rather than cross-contamination, which is when food becomes contaminated by microbes from another food.

Several people in Kate’s town began suffering from a common disease over the past month. Kate approached a group of environmental scientists to help solve the problem.
Which field/subject can help the environmental scientists address the issue?

epidemiology
mathematics
astronomy
chemistry
physics
NextReset

Answers

Epidemiology is the field/subject that can help the environmental scientists address the issue

Epidemiology is the branch of science that deals with the spread, incidence and control of health and disease conditions in specified populations. Epidemiological investigation provides information about the number of individuals that have a disease or disorder, if there is any change in the numbers, how the society is being affected by the disease and how the disease can be controlled/ prevented.


Answer:

Epidemiology

Explanation:

The study of disease spread

Mistletoe grows on other plants, tapping into the nutrients of the host plant. mistletoe can kill its host plant. the relationship between mistletoe and its host plant is best described as a(n) ______________.

Answers

This type of relationship is called parasitism. This is when a living organism attaches itself to another living organism, often referred to as the host. It then feeds off the host and steals nutrients and other things needed to survive. the end result is that it eventually kills off the host in a very slow and lengthy process.

Answer: The type of relationship your answer is about is parasitism it’s when Parasitism is a symbiotic relationship between species, where one organism, the parasite, lives on or inside another organism, the host, causing it some harm, and is adapted structurally to this way of life. The entomologist E. O.

Describe how human activities threaten polar bears in the arctic

Answers

Humans have contributed to the destruction of polar bear's home. Due to climate change which is being accelerated by humans, the polar bears habitat is melting. This give the polar bears less opportunities to hunt since they hunt on ice not water. In short humans are destroying their home and food opportunities.

Is the Answer C? Which of the following best explains how subcellular organelles interact to form polypeptides? Lysosomes catalyze chemical reactions that join amino acids on the endoplasmic reticulum. Mitochondria produce ATP that is used by ribosomes for transcription and translation in the nucleus. mRNA is synthesized from DNA in the nucleus and then goes to the cytoplasm, where a ribosome translates it. Ribosomes translate rRNA into proteins on the endoplasmic reticulum and send them to the Golgi complex for processing.

Answers

Polypeptides are just actually proteins which are unfolded. And so we ask how are proteins made? Remember that we learned about DNA being transcribed to mRNA, and then those mRNA's 3-letter codons are being translated by ribosomes into a polypeptide chain, and then finally folded into a protein. So yes, the answer is C.

The harmless scarlet kingsnake has scales in a coloration and pattern resembling the scales of the dangerous coral snake. The scarlet kingsnake is using __________ to avoid predation

Answers

The scarlet kingsnake is using mimicry to avoid predation.

What are scarlet kingsnakes?

This a specie of snakes mostly kingsnakes found in the southeastern and eastern portions of the United States. they are also referred as scarlet milk snake.

Predation is a biological interaction in which one organism, the predator, kills and consumes another, the prey. It is one of several common feeding behaviors, including parasitism, micropredation, and parasitoidism.

In evolutionary biology, mimicry is defined as an evolved resemblance between an organism and another object, most often another organism of the same species. Mimicry can occur between species or between individuals of the same species.

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Which type of cartilage covers and protects the ends of bones at freely movable joints?

Answers

Thy hyaline cartilage covers and protects the ends of bones at freely movable joints. The hyaline cartilage contains elements that are found commonly in areas such as the ear. It is made this way because it is very elastic allowing the joints it is covering to have more flexibility.

If someone tells you they have a sample of niobium-90, can you tell how many neutrons are in the nucleus

Answers

atomic number of nibium= 41
so neutron numbers= 90-41 = 49

A group of cnidarians that provide food and shelter for many kinds of animals are the ____.

A. jellyfish
B. hydras
C. Sea anemones
D. corals

Answers

A group of cnidarians that provide food and shelter for many kinds of animals are the ( D. Corals )

Answer: D=corals

Explanation:I JUST TOOK THE TEST!!

Chronically high cortisol levels can be harmful to an individual by:

Answers

High levels of cortisol can affect sleep; even if you sleep well, you will still feel fatigued. Another problem is weight gain, especially in the abdominal area. This problem alone can raise blood pressure levels, but high levels of cortisol with only cause your pressure to go higher, leading to a higher risk of heart attack and stroke. Anxiety and depression can also occur due to high levels of cortisol.

A red bird and a blue bird mate, and their offspring are purple in color. What type of inheritance is this?

Answers

Incomplete Dominance! I just took the mastery test and got 100 %

This inheritance is termed as Incomplete Dominance.When a red bird and blue bird mate the result is a purple offspring.This is because neither of the two colors are expressed.This type of a cross results in formation of a new colored offspring here it is purple.Incomplete dominance is a trait in which an intermediate offspring is formed because one allele is not completely expressed over the other paired allele.The resulting offspring is formed with characters that is a combination of both of their parents character.







What cell part is described as flattened membrane sacs and tubes that are believed to be centers for collecting and packaging cell structures and enzymes?

cell wall
mitochondria
chloroplasts
cytoplasm
Golgi complex
endoplasmic reticulum

Answers

Its the Golgi complex, located near the nucleus. 

the answer is golgi complex

The abbreviation of the medical term referring to the result of decreased secretion of antidiuretic hormone by the posterior lobe of the pituitary gland causing polydipsia and polyuria is

Answers

I believe this is referring to diabetes insipidus... if I am correct, the abbreviation would be DI. 

The layer of connective tissue on the inside of bones is called

Answers

osseous tissue is the tissue on the inside of the bone

A certain virus infects one in every 400 people. a test used to detect the virus in a person is positive 80% of the time if the person has the virus and 8% of the time if the person does not have the virus.

Answers

A certain virus infects one in every 200 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 5% of the time if the person does not have the virus. (This 5% result is called a false positive.) Let A be the event "the person is infected" and B be the event "the person tests positive". 

Which person would be most likely to cut out sweets, then eliminate more and more types of foods, but not engage in forced vomiting? someone experiencing restricting-type anorexia nervosa someone experiencing purging-type anorexia nervosa someone experiencing bulimia nervosa someone experiencing acute-type bulimia nervosa?

Answers

This would be indicative of someone experiencing restricting-type anorexia. The person will slowly cut out any and all foods from their diet as a way of trying to manage their weight, but will not vomit up the small amount of foods they do eat.
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