STRUCTURE  Choose the correct direct object pronoun to answer the question and complete the sentence. (Options can be used more than once.)   1. ¿Tienes tu cuaderno? No, no tengo.   2. ¿Armando lee la revista? Sí, Armando lee.   3. ¿Tina saca unas fotos? Sí, Tina saca.   4. ¿El botones lleva las maletas? Sí, lleva.   5. ¿El niño mira los aviones en el aeropuerto? Sí, mira.

STRUCTURE Listening Comprehension. Listen and select the statement that expresses how the people feel in each situation. 1.   2.   3.   4.

STRUCTURE  Use the present progressive of the verb to complete Alfredo’s description of what everyone in his class is doing to prepare for a trip to Puerto Rico. 1. Yo estoy (investigar) la situación política de la isla (island). 2. Marta y José Luis están (buscar) información sobre San Juan en Internet. 3. La esposa del profesor está (hacer) las maletas. 4. Enrique y yo estamos (leer) un correo electrónico de nuestro amigo puertorriqueño. 5. Javier está (aprender) mucho sobre la cultura puertorriqueña. 6. Y tú estás (practicar) el español, ¿verdad?

Which of these is considered a codon?

Below are haploid cells resulting from meiosis. What division error has occurred?  

At the end of mitosis, how do the newly formed daughter cells compare with the original parent cell?

A human gene has this DNA coding sequence: C A T  C A T  C A T  C A T A change occurs, and this is the new code:        C A T  C A T C AC  A T C  A T   What type of mutation is this?   

Most of the CO2 produced during cellular respiration occurs in this step

Following the G1 phase, the cell must pass the G1/S Checkpoint before beginning the process of mitosis.  If the cell does not receive the signal to begin preparing for cell division, what stage does it enter?  

What stage of the cell cycle results immediately after cytokinesis?