3. the extract of which gymnosperm seed is used to improve memory? pine tree ginkgo cycad ephedra

ginkgo

Explanation:

The ginko extract of seeds is believed to improve the memory and enhances metabolism and circulation. It is good health supplement for the adults that experience forgetfulness and also for children who find difficulty in retaining their lessons.  It is used for the treatment of diseases such as alzheimer and dementia. It also helps to improve the cognitive functioning.

the answer is: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall.

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