Astem growing up and out of the soil, away from gravity is an example of a
a. positive tropism
b. negative tropism
c. negative phototropism
d. positive gravitropism

Wht happens as electrons in the electron transport chain release their energy

The dna sequence ttg is changed to tcg and produces a new protein. which type of mutation is this? missense nonsense silent frameshift

Me ! which of the following is an environmental concern of genetically modified foods? a) crops that are drought resistant are introduced providing food regardless of the unpredictable weather b) reduction cost of production for the crops c) an important ingredient may be introduced in a strain of rice for the poor who depend on rice as a primary food d) toxic substances produced as a pesticide may be consumed by unintended species