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jonny [76]
2 years ago
15

Is one born with hormones or do they develop once you are born​

Biology
2 answers:
Alex2 years ago
7 0

Answer:

yes they' get start developing when baby grows as well Borns also be fuse in growing process

andreyandreev [35.5K]2 years ago
6 0

Explanation:

Unfortunately, immediately postpartum and the week following delivery, estrogen and progesterone will both plummet. Simultaneously, there will be a surge in prolactin and oxytocin," says Shah. These wildly swinging hormones are to blame for those crazy emotions you'll experience after giving birth.

I don't understand what do u mean so hope this is helpful for you!!!

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Define the term excretion.
Arisa [49]

The liver breaks down many substances in the blood, including toxins. The liver also excretes bilirubin — a waste product of hemoglobin catabolism — in bile. ... The lungs are responsible for the excretion of gaseous wastes, primarily carbon dioxide from cellular respiration in cells throughout the body.

4 0
2 years ago
Summarize key differences between allopatric and sympatric speciation. Which type of speciation is more common and why? Describe
algol13

Q1: Summarize key differences between allopatric and sympatric speciation.

As we know, the term speciation refers to the process of emergence of new specie on earth due to increase in the genetic diversity of the gene pool of an organism. Allopatric and sympatric are basically mechanisms through which speciation occurs in the world and below are the major differences between these two:

  • In Allopatric speciation, there is a physical barrier between two populations due to which no genetic exchange or gene flow can occur between two population to lead the formation of two new specie over the course of time, on the other hand, in sympatric speciation, two species live in the same geographical area and there is no physical barrier between them, but due to certain traits like preference of certain shelter or food or zygotic incompatibility they donot mate much and eventually develop into new separate species.
  • Allopatric speciation is basically nature driven and operates through natural selection, while sympatric is driven through the mechanism of polyploidy when chromosome set is replicated.
  • Allopatric speciation is common in both plants and animals, while

       sympatric is common in plants.

  • In Allopatric speciation the rate of emergence of new specie is slow fast but in sympatric speciation it is relatively faster.
  • The example of allopatric speciation is the formation of new species of Darwin's finches in Galapagos Island, while the example of sympatric speciation is Alloploid species of Wheat.

---------------------------------------

Q2: Which type of speciation is more common and why?

Allopatric speciation is more common in nature as compared to Sympatric because the main factor leading to speciation in Allopatry is geographical barriers while in the latter one they are nature induced gene flow in population living in same area. Hence geographical barriers are more powerful factor that greatly lessens the transfer of genes in a population while in Sympatry the reduction in genetic flow is less because after all population is living in same habitat.

Here we can take an example of Galapagos Island finches, which were a same specie of finches but when they were isolated through geographical barrier, there were remarkable difference created in the novel species of finches as compared to parent specie. On the other, If we think about the novel varieties of Wheat plants that arise through polyploidy, this polyploidy is only restricted to plants and donot occurs in animals and therefore it is less common.

-----------------------------

Q # 3: Describe two mechanisms that can decrease gene flow in sympatric populations, thereby making sympatric speciation more likely to occur

The two possible mechanisms that can reduce genetic flow in symatric populations are:

1: Changes in chromosome: As we just discussed the example of polyploidy in wheat in which chromosome set is duplicated and new species are formed, in this way they are not able to breed with original parental population and this makes process of Sympatric speciation more likely to occur.

2: Habitat differentiation and sexual selection: This is the second major cause that can lead to Sympatric speciation, What happens in it that some members of a population (the cause is not known) have better preference for a certain place or habitat rather than other and some due to zygotic incompatibility cannot produce offspring due to which they are slightly isolated and with the passage of time give rise to separate specie and ultimately favors sympatric speciation mechanism.

---------------------------------------

Q 4:  Is allopatric speciation more likely to occur on an island close to a mainland or on a more isolated island of the same size? Explain your prediction.

Allopatric Speciation is less likely to occur in an Island close to a mainland and more likely to occur on an Isolated Island, The reason again lies in the definition of Symaptric speciation. When the Island is in close proximity of mainland, obviously there will be a continuous genetic flow between mainland and Island because of their less distance and less chances of genetic divergence. On the other hand if they are suitably separated through a substantial distance, there will be more chances that some members of specie will acclimatize new area better and with the passage of time, will evolve into new species.

Hope it helps!

5 0
3 years ago
How does the Earth-<br> sun-moon system<br> affect life on Earth?
klemol [59]

Answer:

Hello!!! Princess Sakura here ^^

Explanation:

The sun, earth, and moon are held together by gravity, and they interact in lots of ways. The moon orbits the earth because of the pull of the earth. The tides are another interaction in the sun, earth, and the moon system. The tides happen because the moon and sun pull on the oceans, causing them to rise and fall each day.

7 0
3 years ago
I need to know the independent variable​
sp2606 [1]

Answer:

the chirping?

Explanation:

8 0
3 years ago
Read 2 more answers
Alguien me podra ayudar en estas preguntas pls
Elodia [21]

Answer:

2. Si, porque de otra manera se producirían daños el medioambiente, deforestación, y degradación del suelo, el cual es un recurso no renovable.

3. Algunos ejemplos: Rotación de cultivos, mulching, abonos orgánicos o naturales, asociaciones de cultivos.

4. Si, porque no dañan el suelo.

6. La problemática se basa en un mal uso de los recursos hídricos, la falta de riego en los cultivos.

8. Si, porque como se mencionó anteriormente, un uso indiscriminado de químicos daña al medio ambiente.

<u />

Explanation:

La agricultura consiste en la práctica de cultivar plantas y criar ganado. Dicha técnica fue clave para el desarrollo de la civilización humana mediante la cual la cría de especies domesticadas y recolección de cultivos creó alimentos que permitieron a la gente vivir en ciudades. En el siglo XX, la agricultura industrial basada en el monocultivo a gran escala llegó a dominar la producción agrícola. En la agronomía moderna, el fitomejoramiento, el uso de los productos agroquímicos como los pesticidas y fertilizantes, y los desarrollos tecnológicos han aumentado considerablemente el rendimiento de las cosechas, al tiempo que han provocado daños ecológicos y medioambientales generalizados. Las prácticas modernas de cría de animales han aumentado la producción de carne, pero han suscitado preocupación por el bienestar de los animales y los daños medioambientales. <u>Los problemas medioambientales incluyen la contribución al calentamiento global, el agotamiento de los acuíferos, la deforestación, la resistencia a los antibióticos y el uso de hormonas de crecimiento en la producción industrial de carne</u>. Ejemplos de esta degradación del medio ambiente incluyen a la pérdida de biodiversidad, la desertificación, la degradación del suelo y el calentamiento global, que  a su vez provocan la disminución del rendimiento de las cosechas.

2. Si, porque de otra manera se producirían daños el medioambiente, deforestación, y degradación del suelo, el cual es un recurso no renovable. El uso sostenible del suelo permite conservarlo como recurso a largo plazo sin que se produzca su deterioramiento. Al no hacer uso sostenible del suelo, se pone el peligro la agricultura y a su vez la producción de alimentos. Hay que considerar que el suelo es un componente y recurso importante, un reservorio de gran parte de la biodiversidad del planeta. La vida de la flora y fauna depende del buen estado del suelo y nos resulta útil para la obtención de materia prima, siendo el área productiva del mismo limitada y bajo amenaza por los usos intensivos necesarios para satisfacer las demandas actuales. La gestión sostenible de los recursos del suelo contribuye eficazmente a prevenir el cambio climático.

3. Algunos ejemplos:

  • Rotación de cultivos: Consiste en la siembra sucesiva de distintos cultivos en un mismo terreno, a diferencia del monocultivo que se basa en la siembra repetida en el mismo campo. La rotación sirve para reducir la incidencia de plagas ya que se altera el ciclo de vida de los mismos, para controlar malas hierbas, para una distribución mas adecuada de nutrientes, etc.
  • Mulching: Consiste en un método de corte en el cual la máquina cortacésped corta, se tritura, y se deja caer al suelo para que sirva como abono natural.
  • Abonos orgánicos o naturales: Por ejemplo, estiércoles, compostas o residuos de cultivos. Permiten recuperar materia orgánica para la fijación de carbono, aumentan la actividad microbiana, favorece retención y uso de nutrientes y mejora la absorción de agua.
  • Asociaciones de cultivos: Consiste en la siembra de dos o más especies próximas entre sí para que puedan beneficiarse la una de la otra.

4. Si, porque no dañan el suelo, no se utilizan compuestos artificiales o contaminantes y permite un crecimiento de la vegetación de forma mas natural, sin agotar sus recursos.

6. La problemática se basa en un mal uso de los recursos hídricos, la falta de riego en los cultivos. El riego consiste en brindarle agua a los cultivos para satisfacer sus necesidades hídricas que no fueron cubiertos mediante las lluvias, entonces es necesario capacitar a los agricultores para el correcto mantenimiento de los cultivos en cuanto a la proporción de agua que se les debe brindar.

8. <u>Si, porque como se mencionó anteriormente, un uso indiscriminado de químicos daña al medio ambiente.</u> Como así también disminuye la calidad de la fruta, afectando su sabor y sus nutrientes.

La mosca de la fruta es un insecto que produce un daño al picar el fruto, así las hembras realizan la ovoposición generando una vía de  entrada de hongos y bacterias que descomponen la pulpa de la fruta. Esto hace que se produzca una maduración precoz y caída del fruto, y la consiguiente pérdida de cosecha. Es necesario controlar esto pero de manera responsable.

3 0
2 years ago
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