How is Martha’s study biased??

If the experiment was perfomed more then once and you get the same results

Tamarind can be grown on homesteads, plantations, and wasteland or as a forest tree. methods of propagating tamarind there are two methods of propagating tamarind trees: seed propagation and vegetative propagation. seed propagation: it involves the collection, preparation and direct planting of the seed.answer from google full credit to google.

The type of rock she find is a sediment rock