cycadophyta is primitive gymnosperms that evolved from ferns, which characteristics of the fern is still maintained in the cycadophyta?​

What element is able to combine with itself and hydrogen to form large molecules ?

Ture or false evidence for evolution includes millions of fossils

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?