Answer:
no, la selección natural opera sobre los fenotipos seleccionando aquellos que mejor se adaptan a su medio ambiente. En consecuencia, el medio ambiente actúa como agente selectivo pero no es el disparador de los cambios fenotípicos/anatómicos
Explanation:
Jean-Baptiste de Lamarck fue un naturalista francés el cual propuso que los individuos se adaptaban para sobrevivir a su ambiente, y que estos cambios fenotípicos/anatómicos eran transmitidos a la progenie. Por otra parte, Darwin propuso la teoría de la evolución por selección natural la cual establece que aquellos individuos mejor adaptados a su ambiente tiene más chance de sobrevivir y reproducirse, y con lo cual también tienen más chances de trasmitir sus rasgos anatómicos/fenotípicos a la siguiente generación. Hoy en día, la teoría de la evolución de Darwin es ampliamente aceptada por la comunidad científica y permite explicar la variación existente entre individuos. De este modo, de acuerdo a la pregunta planteada, las diferencias anatómicas/fenotípicas entre los individuos de la humanidad no surgieron como respuesta al acondicionamiento ambiental: el ambiente funciona como agente selectivo, seleccionado aquellos individuos mejor adaptados a sobrevivir en cada ambiente en particular.
Which process illustrates a feedback mechanism in plants?*
(1) Chloroplasts take in more nitrogen, which increases the rate of photosynthesis.
O
(2) Chloroplasts release more oxygen in response to a decreased rate of
photosynthesis
(3) Guard cells change the size of leaf openings, regulating the exchange of gases.
(4) Guard cells release oxygen from the leaf at night.
Antibody molecules and receptor molecules
Answer:
The first one is your answer
Chloroplasts take in more nitrogen, which increases the rate of photosynthesis illustrates feedback mechanisms in plants.
feedback mechanism is a form of system regulation that occur in living organs which help to return or restore the body to it's original normal internal condition for sustainability of living. It is also called homeostasis.
Chloroplasts take in more nitrogen, which increases the rate of photosynthesis illustrates feedback mechanisms in plants because nitrogen helps to increase the concentration of chlorophyll which is the green pigment house in chloroplast that aid the increase of photosynthesis rate in plants.
Therefore,Chloroplasts take in more nitrogen, which increases the rate of photosynthesis illustrates feedback mechanisms in plants.
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characteristics of plasmodium
Explanation:
Characteristics of Plasmodium
They characteristically show the presence of apical complex.
Apical complex consists of polar rings, rhoptries, micronemes, mitcochondrions, microtubules and microspores
Organs for locomotion
They show slight amoeboid change of form
The parasite in their life cycle shows an alternation of generation accompanied by an alternation of host
could you please help me
Answer: 7. Salt 8. Luteal or decline. 9. Lungs. Brainliest?
Explanation:
Answer the question and you will get Brainliest :)))))
(a) troposphere
The atmosphere has five different layers that are determined by the changes in temperature that happen with increasing altitude. Living at the surface of the Earth, we are usually only aware of the events happening in the lowest layer, the troposphere, where all weather occurs
Fresh steak is said to have both negative and positive redox potential. Discuss how the redox potential affects the microbial ecology of the food
Answer:
Increases redox potential decreases microbial growth inside food.
Explanation:
The redox potential is considered as one of the most complex indicators of the physical conditions of microbial cultures. The measurement of redox potential could be very useful for the determination of qualitative and quantitative parts of the microbial contamination. During the bacterial growth, the redox potential of the medium decreases. Redox potential is a measure of the tendency of a biological species which can be acquire or lose electrons through ionization. If the redox potential of the medium is increases, there will be lower growth of microbes in the food and vice versa.
Which two elements, in looking at their atoms, have a total of 51 protons between them?
Question 1 options:
Magnesium and Aluminum
Lithium and Scandium
Tin and Hydrogen
both A and B
Answer:
Atomic Mass 121.76 atomic mass units
Number of Protons 51
Number of Neutrons 71
Number of Electrons 51
9 more rows
The two elements, in looking at their atoms, have a total of 51 protons between them are Magnesium and Aluminum and Lithium and Scandium so option d. both A and B.
What are protons?
The protons are + charges particles found in the nucleus of the atoms.
NO. of protons in :
Magnesium and Aluminum- Magnesium has total of 12 proton and Aluminum has 13 total protons. Lithium and Scandium- Lithium has 3 and Scandium has 21So total no. of protons= 12+13+3+21= 50.
Thus it lies in between total of 51 protons in the periodic table.
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If the birth rate and death rate are balanced in a population, how might a population increase in size?
I
Answer:
Population change is governed by the balance between birth rates and death rates. If the birth rate stays the same and the death rate decreases, then population numbers will grow. If the birth rate increases and the death rate stays the same, then population will also grow
Explanation:
Natural increase in a population occurs where Birth rate is greater than death rate. ... Natural decrease occurs when death rate is greater than birth rate. This means that more deaths occur in a population than babies are born so population numbers decline
The population will be doubled by immigration. The correct option is C.
What is immigration?When an animal settles down in a habitat because it has resources nearby or because it is a good fit for them, this is referred to as immigration.
When an animal emigrates, it's because its habitat is no longer perfect for it and it needs to move to a new location with a better habitat.
It is the quantity of members of the same species that have entered the habitat during the time period under examination from outside the habitat.
To immigrate means to move permanently to another country. To migrate is to move, much like wintertime birds. Depending on the viewpoint, one can either migrate, immigrate, or emigrate.
Immigration can increase the size of a population if the birth and death rates are equal.
Thus, the correct option is C.
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Describe how individual cell breakdown energy rich molecules to provide energy for cell functions
Answer:
Through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP.
Explanation:
Cells need a source of energy, they get this energy by breaking down food molecules to release, the stored chemical energy. This process is called 'cellular respiration'. The process is happens in all the cells in our body. Oxygen is used to oxidize food, main oxidized food is sugar(glucose).
.
What is a blastula?
a hollow ball of cells
a hollow tube of cells
a solid ball of cells
a long sheet of cell
what is an organism that obtains energy from the sun through the process of photosynthesis?
Answer:
autotrophs
Explanation:
Which phrase describes a feature of clastic sedimentary rocks?
grouped by color
formed by chemical weathering
grouped by size of rock fragments
formed from dead plants and animals
Answer:
the 2nd one
Explanation:
Answer:
B:formed by chemical weathering
Explanation:
True or false: (I really need help, if you saw this and responded thank you. :)
Answer:
False
Explanation:
heterozygous means there are two different alleles. So the trait would be written as Bb. I can't write the other option because it counts it as a swear word but it means that there are two identical alleles. So it would be written as BB
Answer:
False
Explanation:
HELP ME
Explain how a person's mother and father can both exhibit or show a trait but their children may
not exhibit the trait.
Answer:
a child inherits 50% of the each parents genes.
Explanation:
the percentage goes all the way back to grand parents and great grand parents because your parents also inherited 50 percent of each of their parents. and their parents i herit from ther parents and so on. therefore when u inherit your genes and triats you also inherit some of your grandparents genes. that why some traits might be in the person's mother or father but not in the child because genes are divided into two with each generation.
HELP MEE
The diagram to the right shows the X chromosomes in a female fruit fly and the X and Y
chromosomes in a male fruit fly. The two fruit flies are crossed with each other. Fill in the two
chromosomes below illustrating the female offspring of the fruit flies.
Answer:
the question is not correct
Explanation:
send correct question
Answer:
A
Explanation:
please help no links or ill report you
Answer:
the movement of carbon dissolved in ocean water into rocks
What hypothesis did Miller-Urey test in their experiment?
Answer: The Miller - Urey experiment is an experiment that was conducted by Stanley Miller and Harold Urey last 1950's. The hypothesis that they had tested and demonstrated was that several organic compounds could be formed by simulating the conditions of Earth's atmosphere.The Miller-Urey experiment provided the first evidence that organic molecules needed for life could be formed from inorganic components. Some scientists support the RNA world hypothesis, which suggests that the first life was self-replicating RNA.
Explanation:
Drafts, wind, or physical placement of buildings can make it difficult for investigators to determine where a fire started.
A. True
B. False
Answer:
A. True
Explanation:
I took it on a test and it was correct ; )
Answer:
true
took the test
in your own words, why do you think the mining transitioned from underground tunnels to an open pit
Answer:
Open-pit mines are utilized when stores of industrially helpful metal or shakes are found close to the surface. ... Interestingly, minerals that have been discovered underground however are hard to recover because hard rock can be arrived at utilizing a type of underground mining.
Explanation:
gib brain
A scientist gathers data on the growth of a population over time. A graph of the data is shown below.
Which statement below best describes the graph at point X?
A. The population is declining
B. The population is increasing
C. The population has reached the carrying capacity of the ecosystem
D. The population has exceeded the carrying capacity of the ecosystem
QUESTION 9
Which of the following is not a property of fibre?
O a. It delays gastric emptying
Ob.it
It provides a feeling of satiety
O c It elevates blood glucose levels
O d. It contributes 6-10 kilojoules per gram.
Answer: The correct option is C ( It elevates blood glucose levels).
Explanation:
All animals feed on ready - made food. This food is made up of several groups of substances.All food taken in by an animal can be divided into six groups of food substances or nutrients. They are carbohydrates, proteins, fats and oil, mineral salts, vitamins and water.
Fibres is defined as foods that are usually of plant origin which are indigestible and stimulates movement of the bowels by providing bulk to the intestinal content.
Examples of the plant based food which are rich in fibre include:
--> grains,
--> fruits,
--> vegetables,
--> nuts, and beans.
Fibre is further divided into two:
--> Insoluble fibre: This is also called roughages. They include fruits and vegetables with their backs, whole grains.
--> Soluble fibre: This is the jelly-like fibre that dissolves in water. It includes the flesh of fruits and vegetables, oats.
All fibers can slow the absorption of sugar and fat from food, and therefore help prevent spikes in blood sugar. Therefore the option that fibre elevates blood glucose levels is NOT a property of fibre.
Answer:
c It elevates blood glucose levels
Explanation:
Elevation of blood glucose levels is not the property of fiber because fiber helps control blood sugar. Fiber can't be converted into glucose or fiber does not have glucose so the concentration of glucose can not be increased if more fiber is eaten. Fiber provides a feeling of satiety as well responsible for gastric emptying. One gram of fiber produces 8 kilojoules per gram. So we can conclude that blood glucose level can't be increases due to fiber.
Use the drop-down menus to identify the organelles labeled on the animal cell to the right. Label A Label B Label C Label D
The identification of the organelles labeled on the animal cell to the right are:
Label A : D Label B : BLabel C : CLabel D : A What is an animal cell?An animal cell is a multicellular cell that is present in all animals. The main distinction between an animal cell is that it is made up of without cell wall.
Animal cells do not contain the things such as vacuole chloroplast that are present in plant cells and the cell walls. They are not unicellular because animals are always multicellular.
As the animal cell is a multicellular cell it contains cell organelles like mitochondria endoplasmic reticulum, ribosome, a nucleus that contain the genetic material of the animal.
Thus, the correct options are Label A : D, Label B : B, Label C : C, and Label D : A.
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Which is the most likely explanation for the presence of 13 different finch species on the
Galápagos Islands today?
Answer:
Which is the most likely explanation for the presence of 13 different finch species on the Galapagos Islands today? Many years ago several different species of birds migrated to the islands and the 13 finch species that currently live there are the only species that survived.
Explanation:
Answer:
A. ✅ Many years ago, several different species of birds migrated to the islands and the 13 finch species that currently live there are the only species that survived.
What are the impacts of catastrophic events?
Define global warming? What are the greenhouse gases?
What are the problems associated
arming in artic? Coastal area?
What are some ways that human lifestyles affect the environment?
Describe some sustainable farming techniques.
Describe some environmental parameters that should be examined before building on land?
Answer:
espero que te sirva
Explanation:
El calentamiento global y el cambio climático tienen coincidencia en la principal
de sus causas, la emisión masiva de los diferentes gases de efecto invernadero o
GEI que retienen el calor dentro de la atmósfera y sobre la superficie terrestre a
través del denominado efecto invernadero.
El efecto invernadero es un proceso natural por el cual se produce la retención
del calor procedente del Sol en la atmósfera terrestre gracias a la capa de GEI que
se encuentra en ella. Estos gases en cantidades normales mantienen la
temperatura del planeta aproximadamente a 33ºC por encima de la que podría
tener si estos no existieran, por lo que el planeta sería demasiado frío para que se
desarrollase vida en él. Sin embargo, actualmente el efecto invernadero se está
volviendo tan intenso a causa de nuestras emisiones que comienza a tener graves
repercusiones en el medio.
El Grupo Intergubernamental de Expertos sobre el Cambio Climático (IPCC)
concluyó en el Quinto Informe de Evaluación (AR5) de 2013 que la influencia
humana había sido la causa dominante de este calentamiento producido desde la
mitad del siglo XX a través de la emisión de GEI, lo cual es una evidencia cada vez
mayor. Entre los principales gases emitidos se encuentran el vapor de agua, el
dióxido de carbono, el metano y el ozono.
During which stage of the cell cycle does the
replication of DNA take place?
Answer:
S phase
Explanation:
DNA replication occurs before the cell actually divides.
Does anyone want to get payed good money to do my homework?
If you were trying to better understand keratin
production, which layer of skin would
you research?
epidermis
immune cells
dermis
0 hypodermis
DONE
Answer:
Epidermis (A)
Explanation:
Correct on Edgd
A student must complete the column on the table that list the dates of the full
moons. What are the most likely dates of the full moons? *
Dates of New Moons Dates of Full Moons
February 10
March 11
April 10
May 9
February 5, March 7, April 5, May 4
0
February 15, March 17, April 15, May 14
February 25, March 27April 25, May 24
February 29, March 31, April 29, May 28
Other:
Answer:
February 25, March 27, April 25, May 24
Explanation:
I did the science moon phases for this! I would explain if it showed the graph and everything.
Good luck with it!
The Moon's orbit, which completes one full spin in 27 days, 7 hours, and 43 minutes, is the source of this motion. It compels the Moon to move 12–13 degrees east every day. February 25, March 27, April 25, May 24 Thus option C is correct.
What is Full Moons?When the Moon fills the sky in a perfect circle, it is said to be full.
We can only view the portions of the Moon that are illuminated by other objects because the Moon doesn't create any visible light on its own.
This change causes Moonrise to occur every day around 50 minutes later and necessitates a slightly longer Earth rotation to bring the Moon into view.
Technically, the Moon's “fullness” lasts only a brief period of time.
Therefore, the Moon can appear to be full to the unaided eye for as long as three days.
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PLEASE HELP, I NEED THIS TO PASS xx,
A hypotonic solution has a lower concentration of solutes than a blood cell. Explain what
happens when a blood cell is placed in a hypotonic solution.
A: the blood cell soaks up salt.
B: the blood cell swells with water.
C: the blood cell stays the same.
D: the blood cell loses water.
Answer:
B
Explanation:
Mark as branlist
The boundaries at the Peru-Chile and Aleutian trenches are generally: 1. Convergent 2. Divergent 3. Transform 4. Complex or uncertain
All of these events are characteristic of an El Niño event except:
A- the Midwestern United States experiences more rainfall than usual.
B- the usual South America-to-Southeast Asia winds ease.
C- South Africa, Japan, and Canada experience warmer than usual weather.
D- ocean surface temperatures are lower than usual.
E- storms form off the coast of California.
Answer:
B- the usual South America-to-Southeast Asia winds ease.
Explanation:
The usual South America-to-Southeast Asia winds did not blow from west to east because of El Nino event. In normal condition, the winds blow easterly from South America-to-Southeast Asia which means from west to the east direction but due to El Nino event, the wind blows is reversed which causes the blowing of winds towards westerlies which means from east to the west direction so the usual blowing of winds from South America-to-Southeast Asia did not occur.