A biopsychologist is studying the effects of anabolic steroids on the aggressive behavior of female rats. 24 female rats receive daily injections of a placebo (fake drug), while 24 others receive daily injections of the steroid. Round-the-clock videotapes of the communal cages of all rats allow all aggressive encounters to be counted and timed. What is one of the CONTROLS in this experiment?

Direct Object Pronouns: complete the following answers with the appropriate Direct Object Pronoun:  lo, la, los, las. ¿Los niños comen las zanahorias? Sí, _____________ comen

A control is a factor in an experiment that must be the same in both the control group and experimental group of the experiment.  

Which of the following best describes Natural Selection

Which of the following domains contain the most primitive prokaryotes that live in extreme environments?  

When using the story of the peppered moths as an example of evolution by natural selection, which of the following was the selecting agent?

Which of the following best explains a hypothesis?

Direct Object Pronouns: complete the following answers with the appropriate Direct Object Pronoun:  lo, la, los, las. ¿Compras las manzanas? No, no  ______________ compro.

Using the themes of FROGS, write a developmentally appropriate activity objective for a 3 or 4-year-old that meets Standard  CC2. This activity is for a 3 or 4-year-old. You must name the activity and write a correct objective. (2 points for developmentally appropriateness of activity/ 3 points for a correctly written activity objective). Activity Name: Activity Objective:

“Saber” and “Conocer”:  select the correct answer to complete the following sentence: Tú no _______________ mi número de teléfono.