Why do scientists that that photosynthetic prokaryotes were probably not the first life forms on earth

What blood vessel type transports blood away from the heart?

If the inside of the cell were positive (55mv), in what direction (in or out of the cell) does the force of electrostatic pressure move potassium, sodium, and chloride ions

What is the difference between cell division and replication?

True or False: Biodiversity is the variety of life forms that exist or existed in the past.

If someone nearby has a runny nose, can they spread their snot to you just by being close? Why or why not?

The conversion of co2 and h2o into organic compounds using energy from light is called select one: a. glycolysis. b. photosynthesis. c. fermentation. d. cellular respiration.

Which organism in this food chain is a producer? Grass > Grasshopper > Spider > Bird > Bacteria and Fungi Question 1 options: Grasshopper Spider Grass Bird

The vascular pressure that declines from roughly 35 mm hg to about 18 mm hg is the

Robert places six eggs in a pot of boiling water (100°C) and six eggs in a pot with water at 80°C. He keeps the eggs in the water for ten minutes.

What are amino acids