Answer:
creación de un potencial de acción (despolarización), redistribución de iones a través del soma y finalmente repolarización (estado de reposo)
Explanation:
Las neuronas son células nerviosas capaces de transmitir impulsos en forma de corriente eléctrica. Una neurona está compuesta por dendritas, el soma o cuerpo celular y el axón. Durante la transmisión del impulso nervioso, el estímulo es en primer lugar recibido por las dendritas, recorre el soma y termina en el axón. El impulso nervioso se transmite a través de la neurona mediante un proceso de despolarización. Primero, se produce un aumento de la carga eléctrica en el interior de la membrana neuronal debido al aumento de iones de sodio en el interior celular. A continuación, se produce la redistribución de iones dentro del soma, con lo cual la señal se va transmitiendo a lo largo de la neurona. Finalmente, cuando el impulso ha terminado de recorrer el axón, se produce la repolarización o estado de reposo, donde se produce el restablecimiento de las concentraciones iniciales de iones y la neurona vuelve a su estado inicial.
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A species of beetle can be either black or brown in color. The beetle's color is determined by a single gene, and black is recessive to brown. The soil in the area has become darker and closer in color to the black beetles. Which of the following will most likely occur?
Selective pressures will decrease the number of brown beetles.
Selective pressures will increase the number of brown beetles.
Selective pressures will decrease the number of black beetles.
The overall size of the beetle population will continue to decrease over time.
Answer:
the first option
Explanation:
As the soil gets darker, brown beetles become easily recognised by predators (like birds) and will be eaten. Black beetles however, are better camouflaged and will less likely be spotted by the birds. Black beetles will survive and interbreed, allowing the recessive allele to be passed on to upcoming generations.
Selective pressure is what makes the genetic pool shift toward a particular genotype with a particular phenotype (recessive black in this case) that gives the new generations a selective advantage. They're more likely to survive and reproduce. Survival of the fittest.
Genotype- the genetic makeup of an organism (eg: the recessive gene for black; bb)
Phenotype- physical feature of an organism as determined by the genotype (the colour black)
Selective pressures will increase the number of brown beetles. The correct option is 2.
What is Selective pressure?Any factor that reduces or increases reproductive success in a subset of a population may exert evolutionary pressure, selective pressure, or selection pressure, thereby driving natural selection.
Selection pressure can be defined as a force that causes an organism to evolve in a specific direction.
It is not a physical force, but rather an interaction between natural variation in a species and environmental factors that causes certain forms to have an advantage over others.
A beetle species can be either black or brown in color. A single gene determines the color of the beetle, and black is recessive to brown.
The soil in the area has darkened and taken on the color of black beetles. Brown beetle populations will increase as a result of selective pressures.
Thus, the correct option is 2.
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How does the position of Earth and its orbit affect climate change?
Answer:
The Earth's orbit around the Sun is an ellipse, but it does change shape. ... At other times, the ellipse is more pronounced so that the Earth moves closer and further away from the Sun as it orbits. When the Earth is closer to the Sun our climate is warmer and this cycle also affects the length of the seasons.
What are the two types of evolution? What are the differences between the two?
Answer:
Divergent evolution/ the evolutionary pattern in which two species gradually become increasingly different.
Parallel evolution/ two or more lineages have changed in similar ways so that the evolved descendants are as similar to each other as their ancestors were.
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what is the main difference between photosynthesis and cellular respiration
Answer:
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Cellular respiration converts oxygen and glucose into water and carbon dioxide.
Explanation:
Complete the passage about the process of subduction.
The subduction of
boundary often forms volcanoes. This phenomenon occurs because the underground pressure squeezes water out of the dense crust, and this water works its way into the mantle. The water
the mantle and allows for the creation of magma.
The collision between an oceanic and a continental plate, or two oceanic plates originate volcanoes. a) oceanic crust at convergent boundary b) heats up.
What are convergent boundaries?Collision area between two plates. Two continental plates might collide, or two oceanic plates, or one oceanic plate with a continental one.
In the last two cases, the thicker and older plate subduces under the other plate, and magma rises to the surface by crevices. The Himalayas and Los Andes are examples of these collisions.
Plates' movement might produce earthquakes. Also, collisions create volcanic arches and continental arches.
When one of the plates sinks under the other one, it reaches a depth where it melts and magma rises. Volcanoes get formed on the superior plate since magma flows over it.
The subduction of oceanic crust at convergent boundary often forms volcanoes. This phenomenon occurs because the underground pressure squeezes water out of the dense crust, and this water works its way into the mantle. The water heats up the mantle and allows for the creation of magma.
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Answer:Ocean crust at a convergent / heats up
Explanation:
What color would the bby and water turn with plants in the dark
Answer:
The water is drawn in the xylem through capillary action and is dispersed through out the entire plant from stem to tips of the leaves and petals. When the water is colored, the color from the water can stain the plant, especially if it is a light colored plant, such as the white petals on our flowers.
Explanation:
What type of bonds are present in H2O2?
A.
covalent bonds
B.
nonmetallic bonds
C.
metallic bonds
D.
ionic bonds
Bacteria that generate reactions such as swelling of tissues, and fever in humans are an example of microorganisms that -
A.form mutualistic relationships with cells of other organisms.
B.break down the organic matter of dead plants and animals.
C.are pathogenic and are able to cause disease by killing host cells.
D.live in close association and provide resources for all plants and animals.
Answer:
B. Break down the organic matter of dead plants and animal
Which situation contributes most to the development of soil?
A.
migration of animals across land
B.
building up of snow in very cold areas
C.
lava flowing across the ground after volcanic eruptions
D.
breaking down of rock by wind, water, and ice
Earliest eon of the earth's history
A. Cenozoic Era
B. Precambrian
C. Trilobite
D. Mesozoic Era
Answer:
B-Precambrian is the earliest part of earth's history
An organism has many cells, but cannot move. It does not eat food, but cannot perform photosynthesis cither. What kingdom does it belong to? A,Kingdom fungi, B,Kingdom plantae, C,Kingdom Protista D,kingdom Animalia
Answer:
Explanation:A,Kingdom fungi
A plants ovary helps the plant carry out what function?
Answer:
Ovary, in botany, enlarged basal portion of the pistil, the female organ of a flower. The ovary contains ovules, which develop into seeds upon fertilization. The ovary itself will mature into a fruit, either dry or fleshy, enclosing the seeds.
Answer:
Image result for A plants ovary helps the plant carry out what function?
Ovary, in botany, enlarged basal portion of the pistil, the female organ of a flower. The ovary contains ovules, which develop into seeds upon fertilization. The ovary itself will mature into a fruit, either dry or fleshy, enclosing the seeds.
Which will occur when two organisms in the same habitat occupy the same niche?
A.competition
B.mutation
C.geographic isolation
D.symbiosis
Answer:
abcdefs
Explanation:
According to plate tectonic theory, what happens when two continental plates collide?
Answer:
its A
Explanation:
Answer:
A
Explanation:
Food chains and food webs are....... used to describe energy transfers
Answer: As it goes down in the food chain, and as the energy is passed, only 10% is kept as energy- the rest is lost as heat.
Explanation:
solve those fast 2412412
How many total atoms are represented in the formula CaCO3?
A.
five (5)
B.
six (6)
C.
four (4)
D.
three (3
Answer:
a
Explanation:
bb
When heat is introduced to matter, what happens to the matter at the molecular level?
Explain in science
Answer:
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space.
Explanation:
:With an increase in global climate change occurring, explain some possible effects global
climate change can have on organisms
Answer: rising sea levels
Harsher/more frequent natural disasters
Respiration is a complicated process broken into several steps, but only two reactants are used up in the
reaction and only three molecules are produced, Identify the reactants and products and describe the steps in
which they are used or produced.
Which of these are NOT true about the first step of protein synthesis? *
A. It occurs in the cytoplasm of a eukaryotic cell
B. It is called transcription
C. It involves making an mRNA copy of the DNA
D. RNA polymerase is the enzyme that makes the mRNA copy
Answer:
A?
Explanation:
The first step of protein synthesis is transcription, and transcription occurs in the nucleus of the cell... so...
What happens when we know about other living beings ?
Please I need it soon
Answer:
In order for something to be classified as living, it must grow and develop, use energy, reproduce, be made of cells, respond to its environment, and adapt. While many things meet one or more of these criteria, a living thing must meet all of the criteria.
Match the mechanism to the most likely outcome for each column. One mechanism may be chosen more than once.
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Giving Brainliets if correct! This is important T^T
Theo made a list of items he saw.
Orchid, water, air, fan, grass, fish
Which statement is correct about the items in the list?
A.Fish, water, and air are created from nonliving matter.
B.The basic functional unit of water, air, and fan is the cell.
C.Orchid, grass, and fish are created from nonliving matter.
D.The basic functional unit of orchid, grass, and fish is the cell.
Write a set of directions for a red blood cell to deliver oxygen to the brain. Lungs heart-brain aorta arteries veins
Answer: How does oxygen get into the bloodstream? Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body.OK Our typical red cell passes from the capillary into the venules, and then into veins. It flows back to the right side of the heart, completing the second loop of its circuit [music out]. As we saw, it then travels back to the lungs.The heart, blood and blood vessels work together to service the cells of the body. Using the network of arteries, veins and capillaries, blood carries carbon dioxide to the lungs (for exhalation) and picks up oxygen. From the small intestine, the blood gathers food nutrients and delivers them to every cell.
hope this helps have a awesome night/dayExplanation:
Which of the following represents a path that a nerve impulse could travel in the nervous system?
Answer:
motor neuron-spinal cord- brain
PLEASE HELP! Giving extra points & will mark as Brainliest!
1.Looking at the map of epicenters shown above, what do you notice about the location of most of the worlds earthquakes? What patterns do you notice?
2. Explain the pattern of the earthquake epicenters shown on the map. Why do most of the world’s earthquakes occur in these areas?
Answer:
the answer is jesus... the answer to everything is jesus
Explanation:
he is the son of god and died for our sins
I NEED HELPPPP PLZZZZZZZZZ
Answer:
The second option: Both alleles are expressed
Explanation:
Codominance is when both alleles are expressed.
Which statement from the passage is the best evidence of Phillips and Lederer's relationship as of 2002?
A.
" 'Dear Abby' and 'Ann Landers' were both known by their millions of daily readers for their quick wit and sage wisdom."
B.
" 'Dear Abby' has been in publication for more than 50 years and still read daily by more than 110 million people."
C.
"Although they publicly reconciled in 1964, it is said the bitter rivalry continued behind closed doors for decades."
D.
"Lederer's daughter, Margo Howard, said the women had not been in contact for years, and she believes Phillips just wrote the tribute for money."
I NEED YOUR HELP 35 POINTS PLEASE DO NOT TELL ME THE WRONG ANSWER ITS MY LAST QUESTION
Answer:
D
Explanation:
Step by Step explanation
The food web illustrated here exists in Yellowstone National Park,
Secondary
consumers
Raven (detritivore)
Gray wolf
Red fox
Primary
consumers
Snowshoe
hare
Moose
Beaver
Red squirrel
Primary
producers
端
Pine
Maple
Balsam Fir Cottonwood Aquatic plants
If gray wolves were to go extinct, what would be the two most likely effects
on the ecosystem?
When the gray wolves go extinct, the biodiversity in the ecosystem is decreased and the red fox population is also decreased.
What is the food web?The food web shows all the possible feeding relationships in the ecosystem. The long web shows interrelationships between living things. We can see that the chain where the gray wolves also includes the beover and the red fox.
Hence, when the gray wolves go extinct, the biodiversity in the ecosystem is decreased and the red fox population is also decreased.
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