HISTORIA DE MÉXICO SIMULADOR PARA LA UNAM
Primera forma de gobierno que se estableció en el México independiente.
QUIMICA SIMULADOR PARA LA UNAM
La estructura más estable del carbono es el grafito, ¿Cómo será el valor de energía libre en el cambio de grafito a diamante?
Simulador Admisión UNAM A1 V1
Identifica el enunciado en el que la lengua está usada en su función poética.
Exani II, Exani II -> Estructura de la Lengua
Elija el sinónimo de la palabra en negrita.
Los agradables anfitriones hicieron pasar a los invitados al gran salón, donde se celebraría el baile.
Exani II, Exani II -> Comprensión Lectora
Lee el siguiente texto y responde las preguntas.
El territorio mexicano tiene una superficie de 1 964 375 km², por lo que es el decimotercer país más extenso del mundo y el tercero más grande de América Latina. Limita al norte con los Estados Unidos de América a lo largo de una frontera de 3155 km, mientras que al sur tiene una frontera de 958 km con Guatemala y 276 km con Belice. Las costas del país limitan al oeste con el océano Pacífico y al este
con el golfo de México y el mar Caribe, sumando 9330 km, por lo que es el tercer país americano con mayor longitud de litoral.
¿Qué lugar ocupa México en extensión territorial a nivel mundial?
GUÍA BUAP | Razonamiento Matemático
Un boleto de la lotería costó $10 y fue premiado con $27,000. Al pagar el boleto, Juan aportó $2, Andrés $3 y Pedro $5. El premio se dividió proporcionalmente a lo aportado. ¿Cuánto recibió Pedro?
Administración
El Área de Producción de una organización requiere revisar los procesos de producción y entrega al almacén para su distribución, así como la optimización de movimientos de producción, para ello se debe implementar la técnica de control correspondiente a...
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 | |
Which of the following sentences best summarizes Giacomini's study?
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