All of the following were likely present on the early Earth during the evolution of self-replicating molecules except

amino acids

nucleotides

lipids

free oxygen

If all copepods died

What statement applies to the rows or periods in the periodic table?

Which statement describes the origin of lymph fluid? a. Lymph is secreted into the lymph vessels. b. Lymph is collected from atrial to venous anastomoses. c.

What is a secure chemical landfill? A. a landfill that is completely full and closed B. a landfill in an area of nonporous bedrock C. a biological treatment plant for liquid waste D. a guarded, fenced, and locked landfill

Put the 5 objects in space by order in size : planet, star, moon, galaxy, solar system

What is the Rotation of Earth per hour?.

Spider monkeys in Costa Rica live in the rainforest, where they eat fruit and nuts from big forest trees. The trees also protect them from predators like jaguars and large snakes. The trees are the spider monkey's.

Which key difference do experiments have that correlation studies do not have?

What are the two major components of a carbon footprint and Why?

Match the following vocabulary words with the correct definitions. 1. Place where something is located. amber 2. A mark that is made by pressure. mineral 3. Fossilized sap of trees. site 4. Element or chemical substance from the ground. identify 5.