Um cientista encontro um osso da última era do gelo (2.6 milhoes de anos atráz ) .qual isótopo radioativo deve o cientista usar para determina a idade do osso e parque?

Plzz hurry im being timed during times of vigorous physical activity, muscles require a constant supply of oxygen. how does the body respond to these needs? a. breathing rate and heart rate both decrease. b. breathing rate and heart rate both increase. c. heart rate decreases, but breathing rate remains stable. d. breathing rate increases, but heart rate remains stable.

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

During the process of blank and molecules such as a glucose must use a protein channel to cross through a cell membrane