In genetic drift, allele frequencies change because of.
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In genetic drift, allele frequencies change because of birth rates, death rates, immigration, and emigration
Genetic drift is the random fluctuation of allele frequencies in a small population. Genetic drift is caused by sampling error and sampling error is the difference between the actual and the theoretical frequencies of an allele. A small population can suffer from genetic drift because the small population is subject to fluctuations in birth rates, death rates, immigration, and emigration. These fluctuations can cause certain alleles to increase or decrease in frequency over time.
Genetic drift is important because it can cause a small population to become genetically different from a larger population over time, this is called divergence. Divergence can lead to the formation of new species. Genetic drift is also important because it can reduce the genetic variation of a small population over time, this is called the loss of genetic variation. The loss of genetic variation can increase the risk of extinction for a small population. So therefore birth rates, death rates, immigration, and emigration are factors that cause allele frequencies change.
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I NEED HELP WITH THIS ASAP
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Differences between hormones and nerve impulses may be associated with the type of signal (chemical and electrical, respectively) or also with the mode of transmission of the signal (bloodstream in the case of hormones and neurons from the nerve system in the case of nerve impulses).
What is a hormone?A hormone can be defined as a chemical messenger generated by different types of cells in the organism, which need to bind certain receptors on the cells in order to produce a concomitant response. This type of messenger (hormone) is released by glands and they are transported in the blood.
Conversely, a nerve signal is an electrical impulse that spread from motor neurons to different parts of the body through the nervous system.
Therefore, with this data, we can see that a hormone is a chemical messenger that travels in the blood to reach its final localization, while nerve impulses travel through neurons.
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The number of snails in a given Alabama creek bed by each of 30 segments of the creek is as follows:
32, 6, 21, 10, 8, 11, 12, 36, 17, 16, 15, 18, 40, 24, 21, 23, 24, 24, 29, 1, 4, 9, 32, 23, 40, 15, 29, 25, 33, 20
What is the median number of snails of the 30 segments of this Alabama creek?
Question 6 options:
24
23
21
Answers
Answer: Median is 21
Explanation:
How is the difference in the walls of the atria and ventricle related to the different functions of the atria and ventricle?
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Answer:
The atria are thin-walled sacs that receive blood from the body or lungs, while the ventricles have a thick muscular wall because they must pump the blood with greater pressure than the atria.
Explanation:
In the human heart, the atria and ventricles are responsible for handling blood and have different structures and function.
The atria are thin-walled sacs located at the top of the ventricles and their function is to receive the blood that comes from the whole body —right atrium— or from the lungs —left atrium— to pass it to each ventricle through the atrioventricular valves, which does not require much pressure. On the other hand, the walls of the ventricles are made up of a thick layer of muscular tissue, since the pressure with which they must pump the blood -towards the lungs or to the entire organism- is greater than that of the atria.The structure of each chamber of the heart is configured to be able to fulfill the specific function that they possess.
the subdivisions of the motor nervous system are the nervous system and the nervous system. T/F
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The assertion is untrue. The somatic nervous system and the autonomic nervous system are divisions of the motor nervous system.
Nervous system.The autonomic nervous system regulates automatic reactions including heart rate, digestion, and glandular secretion, while the somatic nervous system regulates voluntary movements of skeletal muscles and reflex arcs. The sympathetic nervous system and the parasympathetic nervous system are additional divisions of the autonomic nervous system.These two systems compete with one another to control internal organ function and preserve homeostasis.The preservation of a largely constant internal environment in the face of shifting environmental factors is known as homeostasis. When there are changes in the external environment, an organism or system can regulate its internal conditions to maintain a steady and stable state.
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The punnets square shown presents a cross between two piranha. Both parents have large teeth. According to the chart which combination describes the offspring expected for the cross?
A) 50% large toothed 50% small toothed
B)75% small toothed and 25% large toothed
C) 75% large toothed and 25% small toothed
D) 100% large toothed
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9. What are the genotypes of the 2 individuals that
have hitchhiker's thumb?
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Answer:
sorry
Explanation:
sorry don't know o will try to find out
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Research the Clements successional theory and answer the following questions.
Were any scientific investigations conducted for proposing the theory? Was this theory tested or simply expected?
Were there any objections to the Clements theory?
Has the theory been subjected to peer review and publication?
Did the scientific community accept the theory?
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Answer: The theories are tested under the controlled conditions of the experimental set up. On the basis of the above description, we can say that the scientific investigations are done in the form of experimentation trials before proposing a theory. The theory is tested and is not simply expected.
A theory is a well-established, tested explanation that provides a unified description of some aspect of the natural world.
Henry Gleason objected to the Clements theory. He emphasized that succession is more dependent on abiotic factors and their interactions with the environment.
Yes, the theory was published and widely spread.
Nearly all (around 97%) of the scientific community accepts evolution as the dominant scientific theory of biological diversity. Scientific associations have strongly rebutted and refuted the challenges to evolution proposed by intelligent design proponents.
Clements described plant succession as a developmental process that ultimately resulted in a mature, or climax, community. This theory was tested, objected, and was not widely accepted.
What is Clements successional theory ?Clements concluded plant succession as a developmental process by which the community acquired well-defined series of stages.
This ultimately resulted in a climax community. The climax community was indicator and expression of the climatic conditions determining it.
Yes there were scientific investigations conducted for this theory.Yes this theory was first tested and not simply excepted. It was first tested for being theory of plant succession.Yes there were objections for this theory that expressed by Gleason. He assumed that identification in Clement theory of particular kinds of vegetation assumed to be of too much homogeneity.The theory was published but not widely among classical economists. It went through review before getting published.Thus, here one can conclude that Clements successional theory was tested, objected, and published.
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Which is a possible description of a sedimentary rock?
A. contains fossils
B. sand, silt, or clay cemented together
C. contains halite minerals
D. all of these are possible
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Answer:
D. all of these are possible
Explanation:
Sedimentary rocks contain fossils, have sand, silt, or clay cemented together, and contains halite minerals.
Answer:
D. all of these are possible.
Explanation:
Sedimentary rocks can contain fossils, as they are formed from the accumulation of sediment that may include the remains of plants and animals. They can also be formed from sand, silt, or clay particles that are cemented together. Sedimentary rocks can also contain minerals such as halite, which is a type of salt.
The population of a colony of mosquitoes obeys the law of uninhibited growth. Use this information to answer parts (a) through (c).
(a) If N is the population of the colony and t is the time in days, express N as a function of t. Consider N0 is the original amount at t=0 and k=0 is a constant that represents the growth rate.
N(t)=N0ekt
(Type an expression using t as the variable and in terms of e.)
(b) The population of a colony of mosquitoes obeys the law of uninhibited growth. If there are 1000 mosquitoes initially and there are 1400 after 1 day, what is the size of the colony after 4 days?
Approximately____mosquitoes
(Do not round until the final answer. Then round to the nearest whole number as needed.)
(c) How long is it until there are 60,000 mosquitoes?
About____days
(Do not round until the final answer. Then round to the nearest tenth as needed.)
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(a) The population of a mosquito colony, constant approximately equal to 2.71828. b. It will take for the population to reach 60,000 mosquitoes. c. population size after 4 days.
(a) The equation \(N(t) = N0e^{(kt)}\) represents the population of a mosquito colony, N, as a function of time, t. N0 is the initial population at t=0, k is the growth rate constant, and e is Euler's number, approximately equal to 2.71828. By plugging in different values of t, we can calculate the population size at different points in time.
(b) To find the size of the colony after 4 days, we need to determine the value of the constant k. Using the given information that the initial population is 1000 mosquitoes and the population after 1 day is 1400 mosquitoes, we can set up the equation 1400 = 1000e^(k*1) and solve for k. Once we have the value of k, we can substitute t=4 into the equation \(N(t) = 1000e^{(kt)}\) to find the approximate population size after 4 days.
(c) To determine the time it takes for the population to reach 60,000 mosquitoes, we set up the equation 60,000 = 1000e^(kt) using the initial population N0 = 1000 and the desired population size. By solving this equation for t, we can find the approximate number of days it will take for the population to reach 60,000 mosquitoes.
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associated with each globin polypeptide of hemoglobin is a ring-shaped, non-protein structure called a ______ group, at the center of which is ______.
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A ring-shaped, non-protein structure called a Heme group, containing an iron ion at its center, is connected to each globin polypeptide of hemoglobin.
Megakaryocytes (MKs), which are sizable polyploid progenitor cells found mostly in the bone marrow, are the source of platelets. Erythrocytes, often known as red blood cells or RBCs, are anucleate, biconcave cells that contain hemoglobin and carry oxygen and carbon dioxide from the lungs to the tissues.
The globin protein can either be broken down further to its individual amino acids, which can then be recycled or metabolized, or it can be recycled. When creating new hemoglobin molecules, the heme's priceless iron is conserved and used again. The protein component of hemoglobin, globin, is broken down into amino acids that can be returned to the bone marrow.
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What do the triangles represent on a topographic map. A mountain peak. B location of a ravine. C steepness of a slope. D distance between two areas.
Answers
Answer:
A. a mountain peak
Explanation:
This is the symbol used and universally known.
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A mountain peak triangles represent on a topographic map.
What are Mountain peak?It is impossible to describe the level of intense excitement one feels after completing a significant task. No matter where they are from, people want to have an oddball, weird trip that inspires them to keep going.
However, they do have a tendency to cause us to lose sight of the fact that there is always something higher to do in life. These include the common, brilliant peaks and mountains that rise to incredible altitudes and are just begging to be conquered.
The ancient ideal of pursuing and achieving exploits that will stamp their names for future generations has always attracted humans.
Therefore, A mountain peak triangles represent on a topographic map.
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Which statement best defines a protist? an organism that reproduces by spores and feeds on decaying matter a eukaryote that is either animal-like, plant-like, or fungus-like a foot-like extension that is used for eating and movement a long, whip-like extension that is used for movement
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Answer:
B. A eukaryotic that is either animal-like, plant-like, or fungus-like.
Explanation:
A protist is best defined as an eukaryote that is either animal-like, plant-like, or fungus-like.
WHAT IS A PROTIST?A protist is an eukaryotic i.e. possess a membrane-bound nucleus organism that belongs to the kingdom Protista.
The kingdom Protista is different from all other kingdoms such as;
FungiAnimaliaPlantaeThis means that an organism classified as a protist can be defined as an eukaryote that is either animal-like, plant-like, or fungus-like.
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Which of the following processes make producers so unique?
Answers
Answer:
I would say b
I might be wrong but I hope i helped! ^^
Answer:
it is D
i am pretty sure
Explanation:
plants use the solar energy from the sun to be able to make chemical energy to synthesis their food( this process is called photosynthesis)
How are Protista similar to bacteria
Both are comprised of
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Answer:
Both bacteria and protists have cell membranes made of chemicals called phospholipids
good morning.
what is photosynthesis?
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Answer:
is the process by which plants use sunlight water and carbon dioxide to create oxygen and energy in form of sugar
Which refers to the amount of energy in a sound wave per unit of time and is also related to the loudness of a sound?
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The average amount of energy passing through a unit area per unit of time in a specified direction is called the intensity of the wave. As the amplitude of the sound wave increases, the intensity of the sound increases. Sounds with higher intensities are perceived to be louder.
What function do most of the stem cells in adults serve?
A. Differentiating into any type of cell
B. Repairing damaged DNA
C. Replacing damaged tissue
D. Growing new organs
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Databases, court records and real estate records are all considered: Group of answer choices c. Forensic data collections a. Sources of information for an investigation. b. Worthless in an investigation. d. Areas of hiding for individuals who wish to commit fraud.
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Databases, court records and real estate records are all considered sources of information for an investigation. These resources provide valuable information that can be used to aid an investigation and solve a case.
Forensic data collections are an important part of any investigation, and databases, court records and real estate records all fall under this category. These sources can help investigators gather information on suspects, victims, and witnesses, as well as provide important details about the crime scene and evidence. By analyzing this data, investigators can build a case and bring those responsible to justice. It is important to note that these resources are not worthless in an investigation, and individuals who attempt to hide information or commit fraud will eventually be caught through the use of these tools.
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The following table describes some landforms.
Landform: Created By: Found In:
Wind erosion Water or glacial erosion Depositions Deserts Coasts Mountains
A Yes Yes No No Yes No
B Yes No Yes Yes Yes No
C No Yes No No No Yes
D No No No No No No
Which landform is most likely a valley?
Landform A
Landform B
Landform C
Landform D
I think it was C, but I just wanted to make sure!
Answers
Answer:
I also think the same it is C
what percent of us energy comes from nonrenewable energy sources
Answers
Answer:
85 percent
Explanation:
What would be the role of the genetic material found in the organelles?
Answers
Please give me the brainiest. It would make my day!
Answer:
Among the more important cell organelles are the nuclei, which store genetic information; mitochondria, which produce chemical energy; and ribosomes, which assemble proteins.
which is an example of commensalism? cattle egret eat insects that are disturbed when the cattle forage
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C: Cattle egret eat insects that are disturbed when the cattle forage" is an example of commensalism.
Commensalism indicates a relationship between two species of organisms, including animals, plants,and fungus, in which one species attains benefits or foods, known as commensal, while the other is unaffected or unharmed, is called host specifies.
So in the example given, cattle egret eat insects, which are disturbed when the cattle forage defines commensalism. The relationship does not have any affect on the cattle, while the cattle egret is depending on this food source.
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Complete question
Which is an example of commensalism? (a) oxpeckers (a type of bird) that live on a rhino and eat parasites off the rhino's back (b) cuckoos, which lay their eggs in the nest of another bird species that then raises the cuckoo's young (c) cattle egret eat insects that are disturbed when the cattle forage (d) protozoa living inside termites, helping termites to digest wood
"
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Spirilla is what type of bacteria
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En los seres vivos acuaticos el oxigeno es tomado del __________ y penetra a la celula por el fenomeno de ___________
Answers
Answer:
En los seres vivos acuáticos el oxigeno es tomado del agua y penetra a la célula por el fenómeno de respiración branquial.
Explanation:
La respiración es el proceso mediante el cual los seres vivos obtienen oxígeno. Es decir, la respiración implica el reemplazo del dióxido de carbono en los pulmones por oxígeno del aire, y puede ser pulmonar, branquial, traqueal o cutánea.
La respiración branquial es un tipo de respiración propia de la mayoría de los animales acuáticos y se lleva a cabo en las branquias, unas estructuras con forma de láminas que contienen vasos sanguíneos. Los animales acuáticos dispone de estos órganos que permiten absorber el oxígeno que se encuentra en el agua y eliminar el dióxido de carbono.
El agua que entra por la boca y circula por las branquias, donde el oxígeno es absorbido, pasa a la sangre y es transportado a todo el cuerpo donde se produce una respiración celular.
Es decir, en los seres vivos acuáticos el oxigeno es tomado del agua y penetra a la célula por el fenómeno de respiración branquial.
what are the Cell Division in the human liver cell
Answers
Answer:
mitotic division
Explanation:
which of the following is a characteristic of vitamins? a. provide energy b. become structural components of the body c. enable chemical processes in the body d. made in sufficient quantities by the body
Answers
Answer: A provide energy i think but not 100% sure.
Explanation:
The characteristic of vitamins are to enable chemical processes in the body.
Organic substances known as vitamins are important for many metabolic activities of the body. Since energy is mostly obtained through macronutrients such as carbs, lipids, and proteins, they do not provide energy directly (Choice A). In addition to not forming structural elements of an organism such as proteins, lipids, and carbohydrates (choice B), vitamins are also not formed.
Instead, vitamins support enzymatic activities and promote chemical processes in the body by acting as cofactors or coenzymes. Since the body is unable to manufacture enough of these, they are only minimally needed and must be supplied by the diet.
So, the correct option is C.
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Which of the following best explains why corals are generally uncommon in temperate latitudes? a. they grow too slowly in temperate waters.
b. corals cannot reproduce in the cooler waters of temperate latitudes. c. they require the higher levels of light found in tropical waters. d. they cannot tolerate the cooler waters.
e. they depend on positive interactions with herbivores, which are less common in temperate latitudes.
Answers
Answer:
E
Explanation:
They depend on positive interactions with herbivores, which are less common in temperate latitudes.
Option (c) they require the higher levels of light found in tropical waters.Corals are uncommon in temperate latitudes because they rely on the higher levels of light found in tropical waters to support their symbiotic algae, which are essential for their survival and growth.
Corals are colonial marine invertebrates that rely on symbiotic algae called zooxanthellae for their survival.
These algae live within the coral's tissues and photosynthesize, providing nutrients to the coral.
For efficient photosynthesis, the zooxanthellae require higher levels of light, which are found in tropical waters.
In temperate latitudes, light levels are generally lower, which makes it difficult for corals to thrive in these regions.
Hence, Corals are uncommon in temperate latitudes because they rely on the higher levels of light found in tropical waters to support their symbiotic algae, which are essential for their survival and growth.
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Which of the following equations correctly relates flow, pressure, and resistance?A. Flow = Pressure x ResistanceB. Pressure = Flow x ResistanceC. Resistance = Flow x PressureD. Flow = Pressure + ResistanceE. Flow = Pressure - Resistance
Answers
The equation that correctly relates flow, pressure, and resistance is B. Pressure = Flow x Resistance according to Bernoulli principle.
The Bernoulli principle is based on the equation of continuity, which states that mass is conserved in a fluid flowing through a pipe or channel, regardless of variations in the pipe's cross-sectional area.
Bernoulli's equation formula is a relation between pressure, kinetic energy, and gravitational potential energy of a fluid in a container. Where p is the pressure exerted by the fluid, v is the velocity of the fluid, ρ is the density of the fluid and h is the height of the container.
In order to maintain a constant mass flow rate, the Bernoulli principle dictates that when the velocity of a fluid increases, the cross-sectional area of the tube or channel through which the fluid flows must decrease proportionally.
The Bernoulli principle is used to explain the lift on an airplane's wings and the flow of blood through the heart, among other phenomena.
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When observing the Earth's biosphere organization, which is the smallest ecological level?
A population
A community
An organism
An ecosystem
Answers
Answer:
it is an orgismi
Explanation:
that is my answer
Answer:
organism
Explanation:
An organism makes up an animal, and when there are many of the same animal, it makes up a population. Many populations of different kinds of animals make up a community. Many communities make up an ecosystem.
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label the pyramid levels in model 1 with following:primary producers, primary consumers, secondary consumers, ann tertiary consumers.
Answers
Answer:
ecological pyramid
Explanation: