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Diagrams of evolutionary relationships are called a trees of life.

A hypothesis must be testable and falsifiable. What does falsifiable mean in this context?

How many oxygen atoms are in the reactants of the following reaction?C6H12O6 + 6 H2O + 6 O2 → 6 CO2 + 12 H2O

Correcto o incorrecto Indicate whether each equation is correcto or incorrecto.   7 – 5 = diez

Cultura Benicio del Toro is a Puerto Rican beisbol player. [1] La salsa is a dance style exported from Puerto Rico to New York. [2] The Observatorio de Arecibo, in Puerto Rico,  is one of the most impressive observatories in the world. [3] Puerto Rico becomes a territory of the USA in the year ______ [4] as a consequence of the war between USA and Spain. Puerto Rico became an Associated Free State (Estado Libre Asociado) in 1952. [5] People born in Puerto Rico need a visa to come to the USA. [6] Puerto Ricans can vote in presidential elections if… [7] In 2017 Hurricane María caused a tremendous amount of damage in Puerto Rico. [8] Jennifer López, Mark Anthony, Benicio del Toro, Ricky Martin, Luis Fonsi, Sonia Sotomayor, and Rita Moreno are just a few of the famous people Puerto Rico has produced. [9] Boricuas is a derogatory term for Puerto Ricans. [10]

Escoger Match the sentences that form logical pairs.   –         

Typing accents Write the following letters and characters. á: [1] é: [2] í: [3] ó: [4] ú: [5] ñ: [6] ¡!: [7] ¿?: [8]

En la clase Fill in the blank with the appropriate form of estar. Remember to write the accent marks when necessary.   ¿Dónde [1] mis compañeros de clase? Tania [2] a la derecha del escritorio.  Yo [3] al lado de Carlos.  Nosotros [4] enfrente de Lucas.  Diana [5] detrás de Verónica.  ¿Y tú?, ¿dónde [6]?    

¿Qué están haciendo? Select the sentence that has a verb conjugated in the Present Progressive. Pay attention to the Direct and Indirect Object Pronouns.  Mis amigos / ver / una película en el cine. 

Cultura Read the following statements and determine if they are Cierto (true), or Falso (false).  Greetings; las Ramblas In Spanish-speaking countries, people customarily kiss when greeting each other in professional settings. [1] Spaniards and Latin Americans tend to have smaller personal space than North Americans. [2] In some Spanish-speaking countries, people greet each other with one kiss on the cheek, and in others with two. [3] Greetings are exactly alike in all Spanish-speaking countries. [4] Gender can play a role in the type of greeting given. [5] The most famous Ramblas are in the city of Córdoba, Spain. [6] Las Ramblas is like a “plaza”, but it is a long boulevard instead of a public square. [7] In Las Ramblas you can go to cafes, restaurants, and kiosks. [8]  Many Hispanic immigrants in Canada have college degrees. [9] The state with the largest Hispanic population in the USA is Florida. [10]