What percentage of energy is transferred when an organism eats another organism at the trophic (feeding) level just below itself?

The three different types of biodiversity discussed were:

What is the best definition of “ecosystem services”?

Which of the following statement is FALSE regarding synaptic transmission of dopamine and its role in learning

Which of the following statements is FALSE regarding synaptogenesis and synaptic pruning?

I VERBI RECIPROCI al presente. Fill in the blanks with the appropriate conjugation in the present tense of the verb in brackets.    Rita e Giorgio (conoscersi) da molti anni, ma non (vedersi) spesso perché Rita lavora a Milano e Giorgio a Roma. Quando sono lontani (scriversi) email e (telefonarsi) spesso. Loro (mandarsi) anche tante messaggi. Quando (incontrarsi) dopo tanto tempo, (abbracciarsi).

IMPERFETTO vs PASSATO PROSSIMO. Look at the context clues and choose the right option.   Mentre tu ___________, io guardavo la tv.

RIFLESSIVO/RECIPROCO OR NOT? Choose the right verb in each sentence according to its meaning   I miei cugini _______________ a calcio per la loro scuola.

CI or NE?  Fill in the blanks with either CI or NE, according to the meaning of the sentence.    – Da quanto tempo abiti in Sicilia? _________ abito da dieci anni.    

VOCABULARY. Look at the picture and choose the sentence that best describes it.