BIO 311DLower division3 credit hours
BIO 311D Introductory Biology II
Since 2011, BIO 311D has averaged 3.20 with 34% A’s. In Spring 2026 it averaged 3.39, about the same as other undergraduate BIO classes that term.
- Credit hours
- 3
- Level
- Lower division
- Class hours a week
- 4
- Grading
- Letter grade or pass/fail, your choice
- Repeat for credit
- No
- Core curriculum
- Natural science and technology, part I (030)
- Texas common number
- BIOL 1307
- Latest grades
- Summer 2026
What grades did students get?
Spring 2026: 1,707 letter grades, 3.39 average GPA, 39% A’s, 63 sections
Bars show the selected term. Short lines show all terms combined.
Grade counts
| Grade | Students | Share | All terms |
|---|---|---|---|
| A | 663 | 38.8% | 33.7% |
| A− | 302 | 17.7% | 13.0% |
| B+ | 223 | 13.1% | 10.8% |
| B | 212 | 12.4% | 17.0% |
| B− | 107 | 6.3% | 6.0% |
| C+ | 74 | 4.3% | 5.1% |
| C | 60 | 3.5% | 8.1% |
| C− | 32 | 1.9% | 2.2% |
| D+ | 7 | 0.4% | 0.8% |
| D | 7 | 0.4% | 1.7% |
| D− | 2 | 0.1% | 0.3% |
| F | 18 | 1.1% | 1.4% |
| Q, W, CR, and others | 58 | Not in the average | |
How have grades changed?
UT’s grade reports show 46 terms from Summer 2011 to Summer 2026 (15 falls, 15 springs, and 16 summers).
Every term
| Term | Sections | Letter grades | Average GPA | A’s |
|---|---|---|---|---|
| Summer 2026 | 8 | 170 | 3.40 | 48.2% |
| Spring 2026 | 63 | 1,707 | 3.39 | 38.8% |
| Fall 2025 | 19 | 454 | 3.17 | 30.8% |
| Summer 2025 | 8 | 167 | 3.31 | 43.7% |
| Spring 2025 | 61 | 1,518 | 3.53 | 50.8% |
| Fall 2024 | 18 | 361 | 3.30 | 32.7% |
| Summer 2024 | 7 | 152 | 3.18 | 27.6% |
| Spring 2024 | 69 | 1,627 | 3.39 | 41.1% |
| Fall 2023 | 27 | 512 | 3.11 | 26.0% |
| Summer 2023 | 7 | 124 | 3.48 | 33.9% |
| Spring 2023 | 69 | 1,652 | 3.48 | 46.0% |
| Fall 2022 | 21 | 471 | 3.24 | 34.4% |
| Summer 2022 | 7 | 140 | 3.49 | 35.7% |
| Spring 2022 | 73 | 1,622 | 3.47 | 47.3% |
| Fall 2021 | 25 | 462 | 3.28 | 34.6% |
| Summer 2021 | 4 | 77 | 3.60 | 50.6% |
| Spring 2021 | 63 | 1,410 | 3.74 | 67.7% |
| Fall 2020 | 26 | 492 | 3.49 | 58.5% |
| Summer 2020 | 3 | 101 | 3.78 | 73.3% |
| Spring 2020 | 64 | 1,433 | 3.77 | 66.9% |
| Fall 2019 | 33 | 573 | 2.75 | 11.3% |
| Summer 2019 | 3 | 68 | 3.15 | 36.8% |
| Spring 2019 | 70 | 1,564 | 3.21 | 26.5% |
| Fall 2018 | 33 | 673 | 2.67 | 11.4% |
| Summer 2018 | 4 | 101 | 3.03 | 35.6% |
| Spring 2018 | 66 | 1,528 | 3.07 | 19.6% |
| Fall 2017 | 28 | 670 | 2.79 | 13.4% |
| Summer 2017 | 4 | 100 | 3.16 | 46.0% |
| Spring 2017 | 63 | 1,362 | 3.08 | 23.1% |
| Fall 2016 | 22 | 608 | 2.86 | 17.4% |
| Summer 2016 | 3 | 83 | 2.89 | 26.5% |
| Spring 2016 | 60 | 1,293 | 3.09 | 25.8% |
| Fall 2015 | 20 | 490 | 2.63 | 10.8% |
| Summer 2015 | 2 | 84 | 2.78 | 29.8% |
| Spring 2015 | 43 | 1,008 | 3.10 | 31.5% |
| Fall 2014 | 24 | 595 | 2.75 | 20.2% |
| Summer 2014 | 4 | 103 | 2.88 | 30.1% |
| Spring 2014 | 51 | 1,187 | 2.99 | 22.2% |
| Fall 2013 | 26 | 584 | 2.80 | 20.5% |
| Summer 2013 | 6 | 137 | 2.80 | 19.0% |
| Spring 2013 | 52 | 1,331 | 2.93 | 19.8% |
| Fall 2012 | 20 | 559 | 2.92 | 24.0% |
| Summer 2012 | 4 | 116 | 2.72 | 20.7% |
| Spring 2012 | 43 | 1,139 | 2.97 | 20.1% |
| Fall 2011 | 20 | 542 | 2.82 | 22.7% |
| Summer 2011 | 4 | 122 | 2.94 | 31.1% |
What’s BIO 311D about?
Introduction to mechanisms of inheritance, evolution, physiology, and species interactions. Biology 301L and 311D may not both be counted. Biology 301M and 311D may not both be counted. Three lecture hours and one discussion hour a week for one semester.
Prerequisites
Biology 311C with a grade of at least C- and credit or registration for Biology 206L.
What comes before and after?
Prerequisites
This class
Leads to
Show 36 more
You can get credit for only one of these
More BIO classes
How we got this
Class details come from UT’s Biology catalog page, checked October 27, 2026.
Grades come from UT’s grade dashboard, updated October 27, 2026. UT leaves out some small classes to protect students’ privacy. Past grades describe earlier terms; your section, instructor, and effort shape yours.
We count each A–F grade once. A’s counts A grades, and A− has its own bar. Subject averages use every letter grade in that subject and level that term, including this class. How the averages are calculated.
Before you register
Sections, times, and seats change every term. Check BIO 311D in UT’s class schedule for the semester you’re planning.