UNAM -> HISTORIA UNIVERSAL SIMULADOR PARA LA UNAM
¿Cómo se llamó el movimiento político e ideológico surgido en Francia durante el siglo XVIII?
Exani II -> Módulos Específicos -> Ciencias de la Salud
Un individuo dice que tiene dolor de cabeza persistente. ¿Con qué término técnico de ciencias de la salud el médico debe describir el síntoma?
UNAM -> BIOLOGÍA SIMULADOR PARA LA UNAM
Parte exclusiva de la célula vegetal, compuesta de celulosa.
Exani II -> Módulos Específicos -> Administración
El supervisor de Producción de una empresa le ordenó a la asistente de Compras que elaborara un reporte, por lo que el responsable de Recursos Humanos le indicó al supervisor que tenía que seguir el procedimiento adecuado para solicitarlo.
¿A qué elemento del diseño organizacional se refiere la situación?
Exani II -> Módulos Específicos -> Probabilidad y Estadística
Se lanza 1 moneda, se tira 1 dado de 6 caras y se elige 1 carta de una baraja que contiene 40.
Determine el espacio muestral.
Exani II -> Módulos Disciplinares -> Ciencias sociales
Seleccione una de las aportaciones de Rousseau durante la Ilustración.
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 | |
Who supports the idea that many human medicines are made of natural sources?
UNAM -> GEOGRAFÍA SIMULADOR PARA LA UNAM
¿En qué ciudades de la República Mexicana se encuentra la actividad petroquímica?
Exani II, Exani II -> Comprensión Lectora
¿Qué oración define la idea central del párrafo?
Al sur del planeta existe un país. En el país hay una gris ciudad y en su corazón, un edificio morado. En lo alto del edificio una azotea, y en ella se escucha un quejido semejante al ulular de un búho. Quien se lamenta es la cuerda de tender de nailon verde, que solitaria se agita con el viento al atardecer.
Exani II, Exani II -> Pensamiento Matemático
Es la solución de la ecuación \(3\left(7x-2\right)=11+4\left(4x-3\right)\)
Exani