user5198: Do we have a question posts per day and month limit on Biology.SE? 
I thought system wide limits were adopted: max. 6 posts/day, max. 50 posts/month.
It was kind of hush-hush, but I thought it was in place across all SE sites. So I was surprised to find 8 questions by the same user on the "front page".
"Good" questions are usually hard to ask. A person doesn't commonly have a half-dozen "good" questions per day. Of course, "good" has to be determined by each site.
The limit is in place to prevent exactly this. I know it's in effect on at least two other SE sites.

user12909: Yes there are limits see The Complete Rate-Limiting Guide. Below, I have added the information you are looking for from the meta. I also remember that SX goes by UTC time so the day changes at about 7pm for people in the US Eastern time zone. Additionally, there is no way around it according to Jeff Atwood since it goes by IP and account. So even if the said user used a different IP, they wouldn't have been able to post since it was all under the same account [1].


Asking


Users < 125 rep, 20 minutes (90 minutes on Stack Overflow)


Users limited by Anti-Recidivism System, one question per week
Users limited from asking questions for 1 - 7 days based on the
performance of their previous questions

Users < 10k rep trip Captcha if more than once per 60 seconds
Users > 10k rep trip Captcha if more than once per 30 seconds
On Stack Overflow, Super User, Server Fault and Math (not active on
all other sites)  

maximum of 6 questions per day
maximum of 50 questions per 30 days

Sorry, you are only allowed to ask 50 questions in a 30 day period


Answering   


Users < 100 rep can't answer their own question for 8 hours
Users < 125 rep, 3 minutes
Users > 125 < 10k rep trip Captcha if more than once per 60 seconds
Users > 10k rep trip Captcha if more than once per 30 seconds


5198: <p>Do we have a question posts per day and month limit on Biology.SE? </p>

<p>I thought system wide limits were adopted: max. 6 posts/day, max. 50 posts/month.</p>

<p>It was kind of hush-hush, but I thought it was in place across all SE sites. So I was surprised to find 8 questions by the same user on the "front page".</p>

<p>"Good" questions are usually hard to ask. A person doesn't commonly have a half-dozen "good" questions per day. Of course, "good" has to be determined by each site.</p>

<p>The limit is in place to prevent exactly this. I know it's in effect on at least two other SE sites.</p>
 12909: <p>Yes there are limits see <a href="https://meta.stackexchange.com/questions/164899/the-complete-rate-limiting-guide">The Complete Rate-Limiting Guide</a>. Below, I have added the information you are looking for from the meta. I also remember that SX goes by UTC time so the day changes at about 7pm for people in the US Eastern time zone. Additionally, there is no way around it according to <a href="https://stackoverflow.com/users/1/jeff-atwood">Jeff Atwood</a> since it goes by IP and account. So even if the said user used a different IP, they wouldn't have been able to post since it was all under the same account <a href="https://meta.stackexchange.com/questions/90470/increase-the-limit-of-6-questions-in-24-hours">[1]</a>.</p>

<hr>

<blockquote>
  <p>Asking</p>
</blockquote>

<ul>
<li>Users &lt; 125 rep, 20 minutes (90 minutes on Stack Overflow)

<ul>
<li>Users limited by Anti-Recidivism System, one question per week</li>
<li>Users limited from asking questions for 1 - 7 days based on the
performance of their previous questions</li>
</ul></li>
<li>Users &lt; 10k rep trip Captcha if more than once per 60 seconds</li>
<li>Users > 10k rep trip Captcha if more than once per 30 seconds</li>
<li><p>On Stack Overflow, Super User, Server Fault and Math (not active on
all other sites)  </p>

<ul>
<li>maximum of 6 questions per day</li>
<li>maximum of 50 questions per 30 days</li>
</ul>

<p>Sorry, you are only allowed to ask 50 questions in a 30 day period</p></li>
</ul>

<blockquote>
  <p>Answering   </p>
</blockquote>

<ul>
<li>Users &lt; 100 rep can't answer their own question for 8 hours</li>
<li>Users &lt; 125 rep, 3 minutes</li>
<li>Users > 125 &lt; 10k rep trip Captcha if more than once per 60 seconds</li>
<li>Users > 10k rep trip Captcha if more than once per 30 seconds</li>
</ul>
