During meiosis, the "shuffling" exchange of genetic material is called
a. crossing-over.
b. synapsis.
c. allele distribution.
d. tetrad formation.

Which of the following elements does soil need in the largest quantities to sustain plant life? a. copper b. iron c. nitrogen d. zinc

The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?

Using meiosis, the sporophyte produces spores that are .