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Con el periódico regeneración los hermanos Flores Magón expresaban su
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¿Cuál es el proceso catabólico en el que algunos organismos degradan compuestos orgánicos en presencia de oxígeno para la generación de energía?
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Pararra_os zambu_ir sosla_o ho_o patru_a.
La opción que completa correctamente a las palabras es
Exani II -> Módulos Específicos -> Historia
Una de las principales características de la Secretaría de Educación Pública al momento de su creación fue su...
UNAM -> HISTORIA UNIVERSAL SIMULADOR PARA LA UNAM
El nacionalismo exacerbado, el imperialismo, el armamentismo y las alianzas con fines militares fueron causas de la
Exani II, Exani II -> Comprensión Lectora
¿Cuál es el propósito del texto?
El aguacateco, lengua originaria en mayor peligro de extinción
De las 62 lenguas originarias que existen en México, 20 cuentan con menos de mil hablantes, lo que significa que en dos generaciones más podrían dejar de utilizarse y extinguirse, con lo cual los idiomas indígenas que han muerto desde la conquista de México aumentarían a unos 130 de un total de 170 que había en el siglo XVI. Según información de la Comisión Nacional para el Desarrollo de los Pueblos Indígenas (CDI) [...], la lengua en mayor riesgo es el aguacateco, pues solo cuenta con 23 hablantes.
Arturo Jiménez. La Jornada
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A partir de la teoría CELULAR QUE NOMBRE RECIBEN LAS ENTIDADES SIN VIDA
Inglés
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 | |
What is a specific implication of Giacomini's study?
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