Tutor profile: Ana O.
How to differentiate when to use a direct object (DO) pronoun and when is needed an indirect object (IO) pronoun?
DO pronouns are used to replace the object that directly receives the action of the verb, to simplify how to know who is the direct object you can ask "TO what/whom is being directed the action?" For example: Tommy huele las flores... what receives the action/what is being smelled? The flowers are being smelled, so to replace the flowers you use the DO pronoun, "Tommy LAS huele". On the other hand IO pronouns are used to replace the object where the DO is going, in this case you can ask yourself "FOR what/whom is the direct object?", so in this case you have to find first the direct object. Let's do an example: Tommy trae flores para nosotros... First finding the DO, what receives the action/what is being brought? The flowers are being brought, so "las flores" are the DO, and FOR what/whom are those flowers?, the flowers are for us, so "nosotros" is the IO, now you can replace it with the IO pronoun, "Tommy NOS trae flores."
Subject: Natural Sciences
What are the main shared features of primates?
The size of the brain and how it is organized is a important shared feature of primates, which can be seen in how they interact with their environment and their society organization. Hands and feet are also one of the main shared features, most primates have five digits, with opposable thumbs, what allows for primates to grab. Another shared feature is the ability to stand erect, which in some cases also comes with the skill of bipedalism, even if it is for short moments. Last very important shared feature are shoulder and hip joints, being wider and more flexible than most of other animals, giving primates a wider range of motion of arms and legs.
You need to isolate a nitrogen- fixing bacteria from a soil sample, how would you do it?
First thing that needs to be done is to dilute the soil sample, by grabbing some of it and placing it in a tube with esterilized and distilled water from there I would cultivate it in four petri dishes with two different medias, two with a nitrogen free media and the other two with a full media, such as nutrient agar. I would let them incubate for a couple of days and then check for the different microorganisms growing, I would expect less growth in the nitrogen free petri dish, but those are the microorganisms that we might need. The other petri dish would just be used as comparisson. If more than one type of microorganisms grow in the nitrogen free petri dish the procedure now is to isolate each of those to get pure strains of nitrogen-fixing bacteria.
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