La científica presenta el resultado.

In Spanish, it is very common to use the definite article with professions or roles when you are talking about a specific person.

So la científica means the scientist.
Here, la shows that the scientist is:

• feminine
• singular
• specific

If you removed la, the sentence would usually sound incomplete in normal Spanish unless the noun were being used in a special context.

Because the sentence is talking about a female scientist.

Spanish adjectives and many profession words change form to match gender:

• científico = male scientist / scientific
• científica = female scientist / scientific

In this sentence, la already tells you the noun is feminine, so científica must also be feminine.

Here, científica is being used as a noun, meaning scientist.

It can also be an adjective in other contexts, for example:

• una revista científica = a scientific magazine

So the same word can function as:

• a noun: la científica
• an adjective: el método científico, la teoría científica

Context tells you which one it is.

Presenta is the third person singular present tense of presentar.

Here it means something like:

• presents
• is presenting
• introduces
• shows

In Spanish, the simple present can often translate into English in more than one way depending on context:

• La científica presenta el resultado.
  • The scientist presents the result.
  • The scientist is presenting the result.

Because Spanish often uses articles where English may or may not use them.

El resultado means the result, referring to a specific result.
The article el is:

• masculine
• singular

So:

• el resultado = the result
• un resultado = a result

Using el tells us it is a particular result, not just any result.

This is the most neutral and common Spanish word order:

subject + verb + object

• La científica = subject
• presenta = verb
• el resultado = direct object

Yes, Spanish word order is more flexible than English, so you might also see:

• Presenta la científica el resultado
• El resultado lo presenta la científica

But those versions sound more marked, literary, or emphatic. For a learner, the normal order is best:

• La científica presenta el resultado.

Because Spanish does not need an extra helping verb like do/does to make a normal present-tense statement.

In English:

• The scientist presents the result.
• Does the scientist present the result?

In Spanish:

• La científica presenta el resultado.
• ¿La científica presenta el resultado?

Spanish changes meaning through:

• verb endings
• intonation
• punctuation in questions

So presenta already contains the information that in English often needs does.

Presenta is:

• third person singular
• present indicative
• from the verb presentar

That means it can mean:

• he presents
• she presents
• it presents
• you present (formal usted)

In this sentence, because the subject is la científica, it means:

• she presents

Spanish often omits subject pronouns because the verb ending already shows the person and number.

So instead of saying:

• Ella presenta el resultado

Spanish often simply says:

• Presenta el resultado

In your sentence, the subject is stated as la científica, so adding ella would be unnecessary.

Spanish usually uses pronouns like ella only for:

• emphasis
• contrast
• clarity

Yes, resultado is a masculine noun, so it takes:

• el resultado
• un resultado

Its gender is part of the noun and must be memorised along with the word.

Although many nouns ending in -o are masculine, that is a pattern, not an absolute rule. In this case, resultado is indeed masculine.

In Spain, científica is pronounced roughly like:

thyen-TEE-fee-ka in much of Spain
or syen-TEE-fee-ka in areas that do not use the th sound

A few useful pronunciation points:

• ci in much of Spain sounds like th in thin
• the stress falls on TÍ because of the written accent: cien-TÍ-fi-ca
• ca is a clear ka sound

So the written accent in científica tells you where to stress the word.

Spanish uses written accents to show when a word’s stress does not follow the usual stress rules.

• científica has stress on TÍ: cien-TÍ-fi-ca
• without the accent, you would expect a different stress pattern

By contrast:

• resultado naturally follows normal stress rules: re-sul-TA-do
• so it does not need a written accent

Written accents are very important in Spanish because they tell you exactly where to place the stress.

Yes. Presentar is a flexible verb, and depending on context it can mean:

• to present
• to introduce
• to show
• to submit

So La científica presenta el resultado could mean different things in different contexts, such as:

• she presents the result at a conference
• she introduces the result in a report
• she shows the result to others

The exact English translation depends on the situation.

Yes. Spanish often uses the simple present in places where English can use either:

• the simple present
• the present continuous

So:

• La científica presenta el resultado can mean:
• The scientist presents the result
• The scientist is presenting the result

If Spanish wants to emphasise the ongoing action, it can also use:

• La científica está presentando el resultado

But the simple present is very common and natural.

The sentence itself is neutral. It is neither especially formal nor especially informal.

What makes it feel a bit formal or academic is the vocabulary:

• la científica
• el resultado

This sounds like something you might read in:

• a report
• a textbook
• an academic context
• a news article

But grammatically, it is just a normal standard Spanish sentence.