nebula can form either a low-mass or medium mass- star that is about the size of our sun or a more star which can be over three times as big as our sun!

How does a gymnosperm prevent itself from pollinating the same tree

Plz ! for many generations farmers in north america have been choosing to cross corn plants with large ears of corn each year this results in the new generation of plants also growing large ears of corn. what is the technique called? a. selective breeding. b. natural selection. c. mitosis. d. asexual budding.

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes