Resolver Preguntas

Choose the correct answer for each question according to the information in the text. Each line is numbered to help you identify them quickly.

Sunflowers Make Bees Poop—a Lot. Here's Why That's Good
Paragraph	Text
[1]	Bumblebees and other pollinators face many threats, including pesticide exposure,
[2]	climate change, habitat loss due to agriculture and development, and pathogens
[3]	that ravage multiple species. But a recent finding may help lighten their load.
[4]	Previous studies have shown sunflower pollen can work like a medicine for
[5]	bumblebees afflicted by a parasite called Crithidia bombi, a single-celled organism
[6]	that takes up residence in the bee's gut [and harms their health]. But scientists couldn't
[7]	explain how sunflower pollen vanquished C. bombi—did it boost the bees' immune
[8]	function, or perhaps poison the parasite directly?
[9]	New research, published in the Journal of Insect Physiology, shows the answer is
[10]	deceptively simple. "Sunflower pollen makes bumblebees poo a whole lot," says lead
[11]	author Jonathan Giacomini, which flushes the parasite out.
[12]	Plant products like nectar and pollen are a treasure trove of potential insect medicines
[13]	that scientists are just beginning to understand, he adds. "There are natural things out
[14]	there that bees are interacting with that can be beneficial for them," Giacomini says.
[15]	And by making changes to the landscape, scientists hope we can help give bees a
[16]	fighting chance.
[17]	Plant power
[18]	If you happen upon a fuzzy, buzzing, flying creature in eastern North America, there's
[19]	a strong chance it's a common eastern bumblebee (Bombus impatiens). Yellow and
[20]	black striped with a rump covered in soft hairs, they're social insects that live in
[21]	colonies and love a good crevice—they build their homes in birdhouses, woodpiles,
[22]	abandoned burrows, and dense grasses.
[23]	[They] are important pollinators, both in the wild and in agriculture, where they're raised
[24]	and used to pollinate crops including tomatoes and pumpkins. Like other pollinators,
[25]	bumblebees face many threats, and C. bombi isn't even the biggest bumblebee
[26]	bugaboo. On its own, the parasite doesn't have much of an effect on a bumblebee's
[27]	health. But when food is scarce, C. bombi can shorten a bee's lifespan and even
[28]	reduce the number of young queens a colony can produce.
[29]	Lynn Adler is an evolutionary ecologist at the University of Massachusetts Amherst
[30]	who studies interactions between plants and insects. For years, she and longtime
[31]	collaborator Rebecca Irwin at North Carolina State University suspected pollinators
[32]	might be getting dosed by flowers since plants often invest chemically active
[33]	compounds into their nectar and pollen to help their genetic payload arrive at
[34]	its destination.
[35]	"Many plant defensive compounds can be medicinal at certain doses," Adler says. After
[36]	all, "most of our human medicines come from plants."
[37]	Giacomini discovered the effect of sunflower pollen as an undergraduate working in
[38]	Adler's lab in 2018. From [these] very first tests, sunflower pollen dramatically reduced
[39]	C. bombi parasite load in common eastern bumblebees, often clearing infection
[40]	completely. "We've been shocked at how consistent and effective sunflower pollen
[41]	has been," Adler says.
Elizabeth Anne Brown, National Geographic

In line 25, the word face refers to the...

The following section of the exam is based on a text about fairies. All the information in this section will be thematically related to such topic.
Fill in the blanks with the option to complete the information given in the following paragraph.

We owe many of our modern ideas _______ fairies to Shakespeare and stories from the 18th and 19th centuries. _______ we can see the origins of fairies as far back as the Ancient Greeks, we can see similar creatures in many _______.

La existencia de aeropuertos internacionales en el sureste de México se relaciona con las actividades

 Causas externas de la independencia de la nueva España.

Son componentes bióticos del ecosistema.

¿Qué porcentaje es dominante y qué porcentaje es recesivo Aa (amarillo) x aa (verde)?

¿Cual es la definición de rapidez media

Lee el siguiente texto y contesta las preguntas.
Carta del viajero
Si, pero a la vez nada más puede estar más próximo que tanta vertiginosa lejanía, y esta carta que debió contener un informe de viaje, una descripción del país que se había encomendado visitar, no admite ser escrita y enviada según las formas usuales. Lo usual no existe en este país, el mero estar en él envuelve en una incierta certidumbre, en eso que quizá siente la arena mientras resbala interminable en el cristal del reloj, midiendo las horas de un tiempo que es siempre un final y un comienzo, una lejanía y una contigüidad. Por eso no esperes de mí los mapas y los señalamientos fronterizos que sin duda deseabas; todo lo que alcance a decirte viene de algo que apenas se deja tocar por el lenguaje, algo que cede a la trampa de las palabras con el orgullo de esos animales que no aceptan el cautiverio y mueren calladamente en las jaulas que pretendían exhibirlos y nombrarlos.
Más vale decírtelo de entrada: a este país no se llega con armas y bagajes y propósitos. Ni siquiera se entra en él: nunca pude delimitar sus fronteras, en algún momento me vi en su paisaje y escuché el primer rumor de sus fuentes. Fijar imágenes en la memoria o en un papel sensible no lleva a ninguna cartografía; su lenguaje, con el que acaso querría ayudarme, no hace más que multiplicar un misterio incesante. No es interrogándolo que podría trazar sus meridianos o sus altitudes, cuando se ha llegado a él sólo se puede avanzar a lo largo de una lenta, extenuante pregunta que lo abarca por entero y que lo vuelve todavía más inasible.

De acuerdo con el texto, ¿por qué quien recibe la carta no debe esperar los mapas y los señalamientos fronterizos que deseaba?

Choose the correct answer for each question according to the information in the text. Each line is numbered to help you identify them quickly.

Sunflowers Make Bees Poop—a Lot. Here's Why That's Good
Paragraph	Text
[1]	Bumblebees and other pollinators face many threats, including pesticide exposure,
[2]	climate change, habitat loss due to agriculture and development, and pathogens
[3]	that ravage multiple species. But a recent finding may help lighten their load.
[4]	Previous studies have shown sunflower pollen can work like a medicine for
[5]	bumblebees afflicted by a parasite called Crithidia bombi, a single-celled organism
[6]	that takes up residence in the bee's gut [and harms their health]. But scientists couldn't
[7]	explain how sunflower pollen vanquished C. bombi—did it boost the bees' immune
[8]	function, or perhaps poison the parasite directly?
[9]	New research, published in the Journal of Insect Physiology, shows the answer is
[10]	deceptively simple. "Sunflower pollen makes bumblebees poo a whole lot," says lead
[11]	author Jonathan Giacomini, which flushes the parasite out.
[12]	Plant products like nectar and pollen are a treasure trove of potential insect medicines
[13]	that scientists are just beginning to understand, he adds. "There are natural things out
[14]	there that bees are interacting with that can be beneficial for them," Giacomini says.
[15]	And by making changes to the landscape, scientists hope we can help give bees a
[16]	fighting chance.
[17]	Plant power
[18]	If you happen upon a fuzzy, buzzing, flying creature in eastern North America, there's
[19]	a strong chance it's a common eastern bumblebee (Bombus impatiens). Yellow and
[20]	black striped with a rump covered in soft hairs, they're social insects that live in
[21]	colonies and love a good crevice—they build their homes in birdhouses, woodpiles,
[22]	abandoned burrows, and dense grasses.
[23]	[They] are important pollinators, both in the wild and in agriculture, where they're raised
[24]	and used to pollinate crops including tomatoes and pumpkins. Like other pollinators,
[25]	bumblebees face many threats, and C. bombi isn't even the biggest bumblebee
[26]	bugaboo. On its own, the parasite doesn't have much of an effect on a bumblebee's
[27]	health. But when food is scarce, C. bombi can shorten a bee's lifespan and even
[28]	reduce the number of young queens a colony can produce.
[29]	Lynn Adler is an evolutionary ecologist at the University of Massachusetts Amherst
[30]	who studies interactions between plants and insects. For years, she and longtime
[31]	collaborator Rebecca Irwin at North Carolina State University suspected pollinators
[32]	might be getting dosed by flowers since plants often invest chemically active
[33]	compounds into their nectar and pollen to help their genetic payload arrive at
[34]	its destination.
[35]	"Many plant defensive compounds can be medicinal at certain doses," Adler says. After
[36]	all, "most of our human medicines come from plants."
[37]	Giacomini discovered the effect of sunflower pollen as an undergraduate working in
[38]	Adler's lab in 2018. From [these] very first tests, sunflower pollen dramatically reduced
[39]	C. bombi parasite load in common eastern bumblebees, often clearing infection
[40]	completely. "We've been shocked at how consistent and effective sunflower pollen
[41]	has been," Adler says.
Elizabeth Anne Brown, National Geographic

On which of the following elements did Giacomini base the underlined comment in line 10?

Se ha estimado que la temperatura del universo fuera de la atmósfera terrestre es de 2.728°K ¿Cuál es su equivalencia en °C?