Here are the answers to the questions based on the passage:

61. **What was finished at a university in 1993?**
An interesting experiment was conducted, where students listened to different types of music to see its effect on their test scores.

62. **How were the scores of the students that had listened to Mozart?**
The students who listened to Mozart had significantly higher scores on the test.

63. **Does music have any impact on other species apart from humans?**
Yes, other experiments showed that animals, such as rats and cows, were influenced by music. For example, rats reacted to different types of music, and cows produced more milk when listening to certain music.

64. **What kind of music is unhelpful to the plants?**
Rock music was found to be unhelpful to plants, as those tested with rock music withered and died.

65. **Should people learn instruments?**
Yes, the passage suggests that it would be beneficial to learn an instrument or buy some classical music, as it may be enjoyable, even if it doesn't improve intelligence.