What is speciation?
A. when a species begins reducing the size of its population
B. the evolution of a new species through a change in the
environment that separates a population
C. when a species outcompetes another and the species
become extinct
D. when a new allele created in a species and the
frequency of the allele changes

Answers

Answer 1
B, the evolution of a new species through a change in the environment is the answer

Related Questions

How can an allele frequency
increase?

A. Allele frequencies always stay the
same.
B. Random mating occurs within the
population
quency
C. An allele becomes more common in a
population.

Answers

Answer:

C

Explanation:

Natural Selection can cause micro evolution, or a change in allele frequency over time

An allele becomes more common in a population. So, the correct option is (C).

What is an Allele Frequency?

Allele frequency is also known as gene frequency. It is defined as the relative frequency of an allele at a particular locus in a population, expressed as a fraction or percentage. It is the fraction of all chromosomes in the population that carry that allele over the total population or sample size.

It forms the basis of many population and medical genetic studies. Many evolutionary forces change allele frequencies where allele frequencies can be used to trace past evolutionary events.

Allele Frequency is expressed as:

[tex]1 = p^2 + 2pq + q^2[/tex]

p and q each represent the allele frequency of different alleles.

Thus, an allele becomes more common in a population. So, the correct option is (C).

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Match the surface to its respective albedo score. fresh snow soil ocean (high-angle sun) ocean (low-angle sun) 0.95 arrowRight 0.2 arrowRight 0.9 arrowRight 0.05 arrowRight Reset Next

Answers

Answer:

fresh snow → 0.9soil → 0.2ocean (high-angle sun) → 0.05ocean (low-angle sun → 0.95

Explanation:

Albedo is the radiation reflected by the earth´s surface to the universe.

Albedo might be defined as a relation between reflected light from a particle and the incident light. It is the fraction of the incident radiation that is reflected by any object. If the surface is mostly clear and clean, most of the incident radiation is reflected. But if the surface is dark and rugose, most of the incident radiation is absorbed, and the temperature of the absorbing object will increase.

Albedo value is always inferior or equal to one and can be expressed as a percentage. The surface that reflects 100% of the incident light will have an albedo value = 1. But if the surface absorbs all the radiation and does not reflect any percentage, the albedo value = 0. Note: there is no real object that might reflect or absorb 100% of the incident radiation.

The importance of albedo is that it avoids high temperatures on the earth. There are many different surfaces with different albedo values. Global variations in albedo are natural processes due to exogenic and endogenic variations. But to these natural events, we must add all the variations caused by human beings´ actions, which increase greenhouse gases, decreasing albedo, and increasing global warming. The increase of greenhouse gases, such as CO₂, decreases albedo. The same occurs with atmospheric dust due to volcanic eruptions. Additional material interposes between the earth´s surface and the universe, decreasing the energy return to the universe.

fresh snow → 0.9   soil → 0.2ocean (high-angle sun) → 0.05ocean (low-angle sun → 0.95

what is the role of the cerebrospinal fluid provides cushioning for the brain maintain a stable ionic concentration in the cns provides a pathway to the blood for waste

Answers

Answer:

The correct answer is - provides cushioning for the brain.

Explanation:

The cerebrospinal fluid or CSF is a clear colorless fluid that is present within the tissue that surrounds the spinal cord and the brain of all vertebrates. The major and main role or function of CSF is to provide a cushion to the brain within the skull and acts as a shock absorber from the outer world impact for the central nervous system.

Other than providing a cushion for the most sensitive body part brain, CSF also transports nutrients and chemicals filtered from the blood and removes waste products from the brain.

When two plants, both tall, were crossed, they produced some offspring that were dwarves. Assuming that the height of the plant is controlled by a single gene and the allele for the tall plant is dominant, what is the genotype of the parents? A. TT and TT B. TT and Tt C. Tt and tt D. Tt and Tt

Answers

Answer:

B for plato users

Explanation:

If both plants are tall and produce some offspring that are dwarfed, it indicates that both parents must have been heterozygous for the height gene. The genotype of the parents is most likely Tt and Tt. Hence option D is correct.

What is a genotype?

A genotype is the genetic makeup of an organism, which is determined by the combination of alleles (different forms of a gene) inherited from its parents. Genes are located on chromosomes and each individual has two copies of each gene, one inherited from each parent.

The genotype of the tall plants could be either homozygous dominant (TT) or heterozygous (Tt), as both genotypes would result in a tall phenotype.

Therefore, the possible genotypes of the parents are:

Tall plant 1: TT or Tt

Tall plant 2: TT or Tt

If we assume that both plants were heterozygous (Tt), then the Punnett square for the cross would be:

   T t

T TT Tt

t Tt tt

As we can see, there is a 25% chance of producing dwarf offspring (tt) when two heterozygous plants are crossed. This result matches the observation in the problem, so the genotype of the parents is most likely Tt and Tt (option D).

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What type of data is represented by the following example:
The sound of the frog's croak is louder than the sound of the cricket's chirp.
informative data
O qualitative data
O managed data
O quantitative data

Answers

Answer:

O qualitative data

Explanation:

Statistically, there are two major types of data namely: quantitative data and qualitative data. Quantitative data are those kinds of data that has to do with numbers and figures expression. For example, the length of a millipede measures 14cm etc.

On the other hand, qualitative data also called descriptive data are kinds of data that basically gives information about or describe a scientific observation. They are not numerical and hence cannot be measured. Example is the observation that the sound of the frog's croak is louder than the sound of the cricket's chirp.

A point mutation that changes a codon specifying an amino acid into a new codon coding another amino acid is called: a. Deletion mutation. b. Missense mutation. c. Nonsense mutation. d. Frameshift mutation.

Answers

Answer:frame shift

Explanation:

Please help ASAP thank you

Answers

Answer:

They will have A or answer choice C

Explanation:

Its c there is only capitals that are possible

what are the types of human grafts.somebody help​

Answers

Autograft as an autologous graft, in which the donor skin comes from a different site on the individual's body

Allogeneic graft: The skin will be taken from another person

Isogeneic graft: The recipient and the donor will be genetically identical (identical twins)

Xenograft: Also termed as xenogeneic, the donor and the recipient will be of different species

Laboratory-grown: Under this one, the skin cells will be taken the patient or the donor, so as to grow new skin

Prosthetic: The procedure will be done using prosthetic implants, that is, synthetic materials such as metal, plastic, or ceramic

can someone please help me and when answering pls tell me what x is

Answers

I believe it’s B transferring oxygen

If a mutation occurs in the coding sequence of a gene, what types of
issues might happen?
Select one:
A) All of these answers.
B) The gene could be expressed in the wrong cell.
C) The gene could be unaffected.
D) The gene could be permanently broken.

Answers

Answer:

A

Explanation:

It will be all because of the fact that mutation does sometimes harm the genes and cells so any types of issues might happen

Decide if each statement is a fact or a misconception about the theory of evolution by natural selection.

According to the theory,
individual organisms
can evolve during
their lifespan.
The theory suggests that
the organisms in a
population that are the
most well adapted are
those that are the largest.
The theory says that
natural selection gives
organisms everything they
need to live.
The theory explains the
origin of life.
The theory proposes that
while natural selection
acts on individuals,
only populations evolve.
The theory says that
organisms that are
better adapted to their
environments will have
higher survival and
reproduction rates.

Answers

Answer:

the theory suggests that the organisms that are well adapted to their environment will have higher survival and reproduction rates.

Answer:Natural selection is the process by which organisms are able to survive and produce offspring who use their environment successfully as compare to those which are less adapted to their environment.

The theory proposes that while natural selection acts on individuals, only populations evolve. Fact

The theory suggests that the organisms in a population that are the most well adapted are those that are the largest. Fact

According to the theory, individual organisms can evolve during their lifespan. Misconception

The theory says that organisms that are better adapted to their environments will have higher survival and reproduction rates. Fact

The theory explains the origin of life. Misconception

The theory says that natural selection gives organisms everything they need to live. Misconception

whole meal bread, banana,lattuce and cabbage are a good source of​

Answers

Answer:

they are good source of fibre

who discovered that white light is a spectrum of colours rays

Answers

Answer:

Isaac Newton

Explanation:

Isaac Newton discovered that white light is a spectrum of seven colour rays.

Will a lunar eclipse be visible from every place on Earth that is facing the moon? Explain the reasoning behind your answer.

Answers

Answer:

It's true that the Moon goes around Earth every month, but it doesn't always get in Earth's shadow. The Moon's path around Earth is tilted compared to Earth's orbit around the Sun. The Moon can be behind Earth but still get hit by light from the Sun. ... Unlike solar eclipses, lots of people get to see each lunar eclipse.

Explanation:

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What is a truck's acceleration if the net external force on the truck is 560 N and it has a total of mass of 1000 kg?

Answers

Answer:

0.56m/s²

Explanation:

The above is the correct answer.

Force = mass x acceleration = mg

⇒ F = mg

where F = 560 N, m = 1000kg

∴ g = F/m = 560/1000 = 0.56

∴ acceleration, g = 0.56m/s² (answer)

Force is known to be a push or a pull which actually puts a body to motion or brings a body to rest.  It has to do with the interaction between bodies.

Surtsey is a volcanic island that was formed off the coast of iceland in the 1960s. After the eruption that created the island, organisms slowly arrived and grew on the island. The first organisms were some bacteria and fungi. Within about two years, the first vascular plants had arrived and by the end of the first decade there were 10 species of vascular plants on the island. Forty years later, there were about 60 species of vascular plants. What is likely true about this situation

Answers

Answer:

The first organisms were some bacteria and fungi.

Explanation:

The first organisms were some bacteria and fungi on the Island of Surtsey because these bacteria and fungi are present in the surrounding air  which can easily reach to that Island. The bacteria and fungi make the environment favourable for the growth of plants and animals. These bacteria and fungi ready the ground for the plants so that they can grow easily with the passage of time.

Surtsey an volcanic islandic island lies in V. archipelago that is the southern coast of island. It was created by a volcanic eruption at 130 meters below sea level.

After the eruption of the volcano on the island, some vascular plants have been found to grow on the northern shores. Mosses were found in 1967. and the lichens were the first to be found. Now the island is covered by the presence of mosses and lichens. This shows within about two years, the first vascular plants had arrived and by the end of the first decade, there were 10 species of vascular plants on the island.

Learn more about the volcanic island that was formed off the coast.

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The lipid bilayer membrane of a neuron is impermeable to charged molecules or ions. To enter or exit the neuron, ions must pass through special proteins called ion channels that span the membrane. Ion channels have different configurations: open, closed, and inactive. Some ion channels need to be activated in order to open and allow ions to pass into or out of the cell. Which ion channels are used in the production of electrical signals (Action Potential) in neurons

Answers

Answer:

The correct answer is: in neurons, the most used ion channels in the production of action potentials are the channels that allow fo passage of sodium and potassium.

Explanation:

Neurons must be able to transmit and receive signals in order for the nervous system to operate. Because each neuron has a charged cellular membrane (a voltage differential between the interior and the exterior), the charge of this membrane can vary in response to neurotransmitter molecules generated by other neurons as well as external stimuli. The membrane potential is the difference in total charge between the interior and outside of the cell. This membrane potential exists thanks to the state of ion channels that may or may not allow the passage of certain ions.

A substance called a neurotransmitter allows a neuron to accept input from other neurons. The neuron will transmit the signal to downstream neurons if the input is powerful enough. The opening and shutting of voltage-gated ion channels, which produce a transient reversal of the resting membrane potential to form an action potential, are used to transmit a signal within a neuron (in one direction only, from dendrite to axon terminal). The polarity of an action potential changes across the membrane as it travels down the axon. The signal then activates other neurons once it reaches the axon terminal.

The target neuron is depolarized to its threshold potential (-55 mV) by a stimulation from a sensory cell or another neuron, and Na+ channels in the axon hillock open, initiating an action potential. The neuron totally depolarizes to a membrane potential of around +40 mV after the sodium channels open. As Na+ channels open, the action potential moves along the neuron.

The cell's membrane voltage is "reset" to the resting potential after depolarization is complete. The Na+ channels shut, signaling the start of the refractory phase in the neuron. Voltage-gated K+ channels open at the same moment, allowing K+ to escape the cell. The membrane potential returns to a negative state as K+ ions exit the cell. The cell becomes hyperpolarized when K+ diffuses out of it, resulting in a membrane potential that is lower than the cell's usual resting potential. The sodium channels revert to their resting state at this moment, ready to open again if the membrane potential rises over the threshold potential again.

Musculo que tiene las características tanto de musculo esquelético como de musculo liso. Se encuentra en el corazón y sus contracciones son involuntarias

Answers

Answer:

músculo cardíaco

Explanation:

Los 3 tipos de tejido muscular son 1-músculo cardíaco o miocardio (involuntario), 2-músculo liso (involuntario) y 3-músculo esquelético (voluntario). Las células del músculo cardíaco, las cuales son conocidas como 'miocardiocitos', poseen una apariencia estriada y forman la pared del corazón. Los miocardiocitos son alargados, ramificados, y poseen un núcleo central (son células uninucleadas, a diferencia de las células del músculo esquelético, las cuales son multinucleadas). Además, los micardicitos son más cortos (80 a 100 µm) y más anchos (aprox. 15 µm) que las células del músculo esquelético. Los miocardiocitos presentan uniones especializadas conocidas como discos intercalares, los cuales son un tipo de complejo de unión entre los límites de dos cardiomiocitos. En el citoplasma de los cardiomiocitos se encuentran las miofibrillas, las cuales son estructuras contráctililes que les confieren a las células musculares sus propiedades características de contracción y de elasticidad. En estas células (cardiomiocitos) las miofibrillas se disponen de manera longitudininal con un patrón estriado.

two example of viruses​

Answers

Answer:

Trojanic bomb.

Polymorphic virus.

Boot sector virus.

Examples of Viruses:

-Coronavirus
-Rabies
-HIV (AIDS)
-Influenza
-Hantavirus
-Ebola
-Dengue
-Diphtheria
-Hepatitis
-Rubella
-Smallpox
-Measles
-HPV


Hope this helps! Please make me the brainliest, it’s not necessary but appreciated, I put a lot of effort and research into my answers. Have a good day, stay safe and stay healthy.

Which is an important difference between light-dependent (L-D) and light-independent (L-IND) reactions in photosynthesis?

Answers

Answer:

The L-D reactions require light energy and water, and the L-IND reactions require ATP, NADPH and CO2.

Explanation:

Question 2 of 25
A sodium atom that has lost an electron comes near a chlorine atom that has
gained an electron. What happens?
A. They form a peptide compound.
B. They form a hydrogen bond,
O C. They form a covalent bond.
D. They form an ionic compound.
PREVIOUS

Answers

Answer:

D. They form an ionic compound.

Explanation:

The bonds which are produced between a metal ion and a non-metal ion are termed as ionic bonds.

consider the differences in solids, liquids and gasses, and their surface area. which state of matter do you think would usually have the greatest rate of reaction, and why?

Answers

Answer:

el que tendrá mayor velocidad de reacción son los líquidos

Explanation:

Which two factors cause one part of Earth to have summer while another part
has winter?

Answers

Answer:

The earths axis

Explanation:

For the earth being on its axis causing it to be on the side so while one side is getting heat the other gets cold this also cause the days to change

Which organism is an animal-like protist?
cilia
dinoflagellate
amoeba
truffle

Answers

Answer:

✅ C. amoeba

just took the test

The organism that is an animal-like protist is the amoeba.

What are amoebas?

Amoebas are a group of single-celled organisms belonging to the phylum Amoebozoa. They are classified as protists, which are a diverse group of eukaryotic microorganisms that do not fit into the categories of plants, animals, or fungi.

Amoebas are characterized by their ability to move and change shape through the use of pseudopodia, which are temporary extensions of their cell membrane. These extensions allow amoebas to engulf and surround their food, typically consisting of bacteria, algae, or other small organisms.

Amoebas are single-celled protists that move using pseudopodia, which are temporary extensions of their cell membrane. They are classified as animal-like because of their ability to move and capture food in a similar manner to animals. Amoebas belong to the phylum Amoebozoa and are commonly found in freshwater and soil environments.

The correct answer is amoeba.

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Which neurons transmit information from the
central nervous system to muscles and glands?

(a) Sensory neurons
(b) Interneurons
(c) Motor neutrons
(d) Bipolar neurons

Answers

Answer:

C

Explanation:

the motor neuron branches from the central nervous system to the effector which can be the muscle or gland

I hope this helps

C) Motor neurons is the correct answer

Compare and contrast the cell structures / organelles found in plant and animal cells
• list 3 organelle / structure plant and animal cells have that are the same
• list 2 organelles / structures plant and animal cells have that are different

Answers

Answer:

Explanation:I need to get some answers too

An essential amino acid can be synthesized in the body if caloric intake is adequate. cannot be synthesized in the body in sufficient quantity to meet body needs. can be formed in the body from nonessential amino acids. can be synthesized in the body if there is a nitrogen source.

Answers

Answer:

cannot be synthesized in the body in sufficient quantity to meet body needs.  

Explanation:

Amino acids are defined as the structural units which make up the proteins in our bodies. They help to break down foods, repair tissues, and serves many more functions.

Our body is not capable of making the essential amino acids that are required by the body. They should be come from the food we eat.  And hence the essential amino acids cannot be synthesized in our body in the sufficient quantity to meet our body needs.

why glucose need to returned to the blood

Answers

The cells need glucose for energy. ... The liver absorbs glucose then changes it into a storage molecule called glycogen. When blood sugar levels drop, glucagon instructs the liver to convert the glycogen back to glucose, causing blood sugar levels to return to normal.

e)Name the force provided by the leaves of tall trees which draws
more water due to adhesion.

Answers

Answer:

Capillary action

Explanation:

Capillary action helps bring water up into the roots. With the help of adhesion and cohesion, water can work it's way all the way up to the branches and leaves. Read on to learn more about how this movement of water takes place.

please tell me the answer ​

Answers

Answer:

1)the process being studied in the picture is transpiration I guess

3)the pot is covered with plastic sheet to trap the water (vapour) which is being evaporated

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