Los métodos hormonales son eficientes porque: * A: impiden la entrada de los espermatozoides C: Se inhibe (no se desarrolla) la ovulación B: El óvulo jamás se encuentra con el espermatozoide D: Los espermatozoides quedan atrapados y no llegan al óvulo
Answer: C: Se inhibe (no se desarrolla) la ovulación.
Explanation:
Los métodos anticonceptivos se utilizan prevenir el embarazo no deseado, evitando que el esperma fertilice a un óvulo. Hay distintos tipos, los cuales se clasifican en:
Anticonceptivos hormonales: Contienen hormonas, tales como estrógeno y progesterona, que previenen la ovulación (es decir, la liberación de óvulos de los ovarios). De esta manera, al no haber óvulo disponible, por mas que hayan espermatozoides, no va a ocurrir ninguna fecundación. El método mas conocido es la píldora o pastilla anticonceptiva. Anticonceptivos de barrera: Proveen una barrera física que impide la fecundación al impedir el encuentro entre el óvulo y el espermatozoide. Por ejemplo, el uso de preservativos o condones. En estos métodos, se impide la entrada de los espermatozoides, no se encuentran con el óvulo y la esperma queda atrapada dentro del condón. Anticonceptivos permanentes: Proveen un método permanente como por ejemplo el Dispositivo Intrauterino que se coloca en el tracto uterino con una vida media de meses o años y posee un efecto espermicida que mata a los espermatozoides (por lo que no lograrán encontrar un óvulo). Otro ejemplo es la vasectomía, la cual es una cirugía que corta los conductos deferentes que transportan a los espermatozoides por lo que ya no pueden salir de los testículos para producir la fecundación (quedan atrapados dentro de los testículos, no entran al tracto uterino y no encuentran al óvulo)Tanto los métodos de barrera como los permanentes, no inhiben la ovulación aunque si impiden que el óvulo se encuentre con el espermatozoide. Entonces, los métodos hormonales son los únicos que logran inhibir la ovulación. Las píldoras que poseen las hormonas previamente mencionadas pero fabricadas sintéticamente. Las mismas mimetizan el efecto de las hormonas naturales producidas por el cuerpo, alterando el ciclo menstrual regular y así evitan el embarazo ya que no habrá óvulo disponible para fecundar. Además, también pueden alterarla mucosidad en el cuello del útero para que los espermatozoides no pueden atravesarlo y llegar al óvulo. De todas maneras, el objetivo principal y mas importante de los métodos hormonales es bloquear la ovulación.
Anaerobic prokaryotes use what
to obtain energy.
Answer:
they use anaerobic respiration in the absence of oxygen
.5km/sec north by northwest is an example of
speed
acceleration
velocity
distance
Answer:
The answer is Distance.
Explain the phenomenon you observe in the diagram. Provide as many details as possible to your explanation
Answer:
reflection
Explanation:
this is what is seen on the mirror
Which three statements contain information about cats that is based on scientific knowledge rather than opinion?
Answer:
First claim '' cats are very smart animal''. Second claim '' cats make bonds with humans''
The endosymbiosis hypothesis is supported by all of the following pieces of evidence except the fact that Group of answer choices chloroplasts reproduce through a splitting process like certain prokaryotes. mitochondria have circular DNA like prokaryotes. chloroplasts have ribosomes like prokaryotes. mitochondria lack ribosomes like prokaryotes.
Answer:
The correct answer is - mitochondria lack ribosomes like prokaryotes.
Explanation:
The Endosymbiotic Theory says that mitochondria and chloroplast in eukaryotic cells are developed by the once aerobic bacteria that were engulfed by a large anaerobic bacteria.
This theory suggests the origin of eukaryotic cells. Various evidence exists such as mitochondria and chloroplasts contain their own circular DNA like prokaryotic cells and mitochondria and chloroplasts have 70S ribosomes like prokaryotes have.
Which of the following is TRUE about the movement of earth's plates?
A. They do not move because they sit on a layer of solid rock
B. They move along with the layer of slightly softened rock below them
C. They move by floating on a layer of completely melted rock below them
D. They do not move until the solid rock layer beneath them temporarily melts and moves
Answer:
c
Explanation:
the tectonic plates or the crust of the earth sit on molten rock moving across the planet with causes the plates to move causing things like earthquakes and volcanos
Movement of Earth's plate can be due to many reasons and can cause many disasters. They move along with the layer of slightly softened rock below them
What is the 3 causes of this movement?Earth's plates move due to the intense heat in the Earth's core. This causes the movement of soften rock in the mantle layer.
It moves in a convection cell pattern that forms by rising of warm, cooling and then sinking down of material.
The Earth's plates move by floating on a layer of completely melted rock below them.
Thus, the correct option is B.
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In chickens, FF produces extreme frizzle (very brittle and curly feathers), Ff has mild frizzle and ff has normal feathers. An extreme frizzle hen is mated with a normal rooster. What will the chickens look like? What will their genotype be?
Cross (parents):
Offspring will look like:
All of the genotypes will be
Answer:
if pure FF and pure ff marry, phenotypic ratio is all Ff or half-half
mild-ruffled feathers for all the chicks
Explanation:
makes sense
What was the purpose of Hardy and Weinberg´s work?
A) To learn where genetic information is stored
B) To count the total number of alleles in the world
C) To learn how to control the mating of organisms
D) To determine how allele frequency changes
Answer:
Is D
Explanation:
check picture so match the answer
Anyone know this problem?
Answer:yoda
Explanation:
what are end-product of digestion of starch,proteins and fats.
Answer:
proteins - amino acids
fats - fatty acids and glycerol
starch - glucose
I hope this information was of any use to you.
Answer:
can you fart on my face
Explanation:
plz
How do white blood cells protect the body against infections
Answer:
White blood cells, which are also called leukocytes or white corpuscles, are a cellular blood component that does not include hemoglobin, have a nucleus, are motile, and protect the body from infections and diseases through ingestion of foreign materials and cellular debris, destruction of infectious agents and cancer cells or production of antimicrobials.
Explanation:
There are 4,500 to 11,000 cells in the white blood of a healthy adult person per cubic mm of blood. During the day, fluctuations in the number of white cells take place; lower values during rest and higher during exercise are attained. The quantity of white cells increases abnormally, while the number decreases abnormally, Leukopenia.
Intensive physical activity, seizures, extreme emotional response, pain, pregnancy, labor, and specific conditions such as infections and intoxications may increase the counting of white cells. In reaction to some types of infections or medication, or in conjunction with certain illnesses such as chronic anemia, malnutrition, or allergy, the number may drop.
what is the menstrual cycle
Sodium metal reacts whit hydrochloric acid to produce salt and hydrogen gas. What are the reactants in this chemical reaction
Answer:
Na (sodium) and HCl (hydrochloric acid)
Explanation:
The products are the salt and hydrogen gas
Whenever you see the word react it means those are the reactants (usually whatever compound comes before and after the word). Because they are reacting with each other.
Whenever they say "is produced" those are the products
what happens to one's body when they starve
there hungry
...................
Answer:
The body lacks a proper circulation of oxygenated blood, hence abnormality in respiration.
Why are amino acids called “amino acids?”
They are subunits of macromolecules that act as both strong acids and strong bases in solution.
They are single molecules that contain both an amine group and a carboxylic acid group.
They are acidic and were first discovered by a Russian researcher by the name of Aminov.
Answer:
The name “amino acid” is derived from the amino group and carboxyl-acid-group in their basic structure.
Explanation:
In a large population of sea stars, half of the individuals possess the red allele and half possess the purple allele. A change in the genome has been introduced, and many of those with purple allele are dying. Therefore, the red allele has become more frequent over time.
Which of the following requirements for the Hardy-Weinberg equilibrium is not being met?
Answer:
A
Explanation:
All mating must be totally random
Hardy-Weinberg equilibrium is a mathematical model that describes the genetic equilibrium of a population in terms of allele frequencies. It states that allele frequencies in a population remain constant over time in the absence of any evolutionary forces.
What are the requirements of the law ?In order for this balance to be maintained, five basic requirements must be met: large population size, random mating, no mutations, no migration, and no natural selection. In this case, the starfish population does not satisfy the fifth requirement for no natural selection.
Natural selection occurs as individuals with the purple allele die off, resulting in the red allele becoming more common over time. This type of directional selection causes allele frequencies to deviate from Hardy-Weinberg equilibrium.
Therefore, no natural selection requirement is met in this starfish population. This causes allele frequencies to change over time, leading to a deviation from Hardy-Weinberg equilibrium.
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wich best describes how mRNA is used by a cell
Explanation:
where are options??????????????
?Messenger RNA (mRNA) molecules carry the coding sequences for protein synthesis and are called transcripts; ribosomal RNA (rRNA) molecules form the core of a cell's ribosomes (the structures in which protein synthesis takes place); and transfer RNA (tRNA) molecules carry amino acids to the ribosomes during protein ...
Answer: Pretty sure its option D that is the correct answer. Transcription of DNA results in the formation of mRNA. A polypeptide chain is formed when codon sequences of DNA reach the ribosome, delivering DNA sequences to the ribosome.
Explanation:
I can't see the choices but I've done this activity before and that's how I know
What would happen if there were no condensation stage in the water cycle?
answer : there would be no rain.
10. Michelle and David have been dating for almost two years. One night they
decide to take it further than kissing. Michelle asks if he has a condom. He says
no and that he will just pull out before he ejaculates so she won't get pregnant.
This is a really good method to use if you do not have another contraceptive
available. *
True or false?
Which type of bond forms between water molecules?
Answer:
Hydrogen Bonds
Explanation:
✦ ✦ ✦ Beep Boop - Blu Bot! At Your Service! Scanning Question . . .
Code: Green! Letters and Variables Received! ✦ ✦ ✦
--------------------------------------------------------------------------------------------------------------Question: Which type of bond forms between water molecules?
--------------------------------------------------------------------------------------------------------------Answer: Water is polar, and the dipole bond it forms is a hydrogen bond based on the two hydrogen atoms in the molecule. Hydrogen bonds are especially strong because the hydrogen atom in molecules such as water is a small, naked proton with no inner electron shell.
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mention 5 ways of preventing STI
Answer:
Use latex condoms every time you have sex.
Avoid sharing towels or underclothing.
Wash before and after intercourse.
Get a vaccination for hepatitis B.
Get tested for HIV.
Explanation:
its common sense
If something is 12 grams and has a volume of 1.6 cubic centimeters, how many grams per cubic centimeter.
Answer: 7.5 grams per cubic centimeter.
Explanation:
We area given that , Mass of something is 12 grams
Volume of that thing is 1.6 cubic centimeters
To find gram per cubic centimeters, we will divide Mass by Volume ( which computes Density)
Number of gram per cubic centimeters = [tex]\dfrac{12}{1.6}[/tex]
Number of gram per cubic centimeters = 7.5
Therefore, 7.5 grams per cubic centimeter. (density of the thing)
Cellulose is found throughout the cell wall of plant cells so cellulose make cells walls Ridgid which indicates that Cellulose is a
Which example of a food production method is sustainable?
A. Planting a monoculture crop over large areas of land
B. Using no-till farming practices to decrease erosion
C. Using enough pesticides to reduce bee populations
D. Irrigating soil until it becomes waterlogged
what do you mean by the chromatin fibres ?
Hey buddy I am here to help!
Chromatin fibers are coiled and condensed to form chromosomes. Chromatin makes it possible for a number of cell processes to occur including DNA replication, transcription, DNA repair, genetic recombination, and cell division.
Hope its helps!
Plz mark me brainliest!
What does a two direction arrow indicate in a chemical equation
Answer:
reversible reaction
Explanation:
The double arrow denotes a reversible reaction. The reactants become products and the products can become reactants again using the same process.
Los gatos tienen muchas opciones para comer como ratones, peces, cucarachas, etc. Por ejemplo: Planta -> Ave -> Gato -> ??? ¡¿Quién mata al gato para comérselo?! POR FAVOR ESPARA UN PROYECTO DEL ORIGEN DEL GATO
Answer:
Pumas, lobos y coyotes, águilas, serpientes, halcones, búhos y perros.
Explicación:
Pumas, lobos y coyotes, águilas, serpientes, halcones, búhos y perros son los animales que matan al gato y se alimentan de ellos. Estos organismos son los depredadores de los gatos y dependen del gato y de algunas otras especies para cumplir con su requerimiento de alimento. Algunos animales matan directamente al gato a través de sus dientes fuertes, mientras que otros matan al gato a través del veneno que está presente en su boca.
what can scientists learn from radiometric dating?
A- how long ago a plant or animal lived
B- how much time it took a fossil to form
C- where a plant or animal lived
D- whether a fossil has modern relatives
Answer:
Radiometric dating is used by geologists to determine the age of rocks and the ages of fossils found within them.
Answer:
It is how long ago a plant or animal lived or answer A.
Explanation:The more of certain item in a cell such as carbon or something like that each one is like I don't know like 100,000 years ago hope this helps.
Label the lettered phases of the cell cycle according to the diagram in Figure. 1-1.
Figure 1-1
A =
B =
C =
D =
Answer:
Explanation:
A = G1 phase (Growth phase)
B = S phase ( Growth and DNA Synthesis)
C = G2 phase (Growth and final preparations for division)
D = Mitotic phase (Prophase, Metaphase, Anaphase, Telophase, and Cytokinesis)
