In 2009, a flu pandemic was believed to have originated when viral transmission occurred from pig to human, thereby earning the designation “swine flu.” Although pigs are thought to have been the host for the 2009 virus, sequences from bird, pig, and human viruses were all found within this newly identified virus. What is the most likely explanation for the presence of sequences from bird, pig, and human viruses?

Fill in the blanks with the correct form of “ser” and “ir” in the preterite. Los papás de María  muy generosos.

Use the figure and the following description to answer the question. In a particular plant, leaf color is controlled by gene locus D. Plants with at least one allele D have dark green leaves, and plants with the homozygous recessive dd genotype have light green leaves. A true-breeding, dark-leaved plant is crossed with a light-leaved one, and the F1 offspring is allowed to self-pollinate. The predicted outcome of the F1 cross is diagrammed in the Punnett square shown in the figure, where 1, 2, 3, and 4 represent the genotypes corresponding to each box within the square.     Which of the boxes marked 1-4 correspond to plants with dark leaves?

Fill in the blanks with the correct form of the reflexive verb in the present tense. Carlos (enojarse) con su mamá cuando tiene que limpiar su cuarto.

Select the appropriate indefinite or negative word. En la playa, siempre hay ______ que hacer.

Fill in the blanks with the correct verb like “gustar” in the present tense. A nosotros (aburrir) cantar y bailar.

Select the appropriate indefinite or negative word. Alicia va a escoger (choose) _______ de estos colores.

Fill in the blanks with the correct form of the reflexive verb in the present tense. Nosotros (afeitarse) antes de ir al trabajo.

b) Explain TWO measures that should be followed to prevent getting infected by Epstein-Barr virus.

this is a media comment Listen to Ana’s description of the Hernández dormitory. Then answer the question based on her description.  ¿Qué prefieren hacer algunos de los compañeros de Ana?