If you notice in both verses it says:
zawjayni ith'nayniIn Arabic, there are three types of nouns:
- Singular
- Dual
- Plural
(In English, there is only singular and plural)
Zawjani is a dual noun. Ith'nayni is also a dual noun.
https://imgur.com/a/GWLDCyNSo
even if "Zawjani" is translated as "kinds" rather than "pairs", it is in
dual form--so it means "2 kinds" which means the same thing as a "pair". Thus the verses that say "zawjayni ith'nayni" would be saying "two kinds two". It is using the number 2 twice. 2 x 2.
Some English translators have picked up on this, for example: In translating 13:3, Yusof Ali writes "and fruit of every kind He made in pairs,
two and two". Other English translators have also written "two pairs"--see:
Dr. Laleh Bakhtiar, T.B.Irving, Abdul Hye, Abdul Majid Daryabadi, Muhammad Mahmoud Ghali, Syed Vickar Ahamed, Farook Malik, Dr. Kamal Omar, Maududi, Ali Bakhtiari Nejad, A.L. Bilal Muhammad, Sayyed Abbas Sadr-Ameli, Mir Aneesuddin etc.
Allah could've just simply said "and fruits he made Zawjani" which would say "fruits made in pairs"--but Allah didn't say that. He added the redundant word "ith'nayni". It is clear from the science what Allah is referring to--double marriages, double mating, double fertilization IN fruit. Notice how the verse says "Fiha" which means In/inside. It is saying INSIDE the fruit there are double pairings of mates. Male and female gametes/cells are inside the fruit. It is not a contradiction at all--in fact, given the deliberate seemingly unnecessary redundancy of using "Ith'nayni" in 13:3, Allah is pointing to that redundancy INSIDE fruits. Literally double spouses; double fertilization.
As a side note, notice how the Quran does not rule out the existence of a multiplicity of double fertilization in fruits (eg. Fruits can have multiple seeds--each seed is doubly fertilized)--it just said inside fruits, there are double matings. It didn't say how many double matings are occurring, as thus, it does not explicitly rule them out. It's kind of like saying: "In plants, there is X"<---When I say this, I am not ruling out that plants also have Y--I just said they have X in them: that is a true statement.