Oxygen was introduced into the atmosphere as a byproduct of a. respiration. c. dehydration. b. photosynthesis. d. osmosis.

What are some biotic factors that can affect population density

Which protists have cells walls and reproduce by forming spores

A circular molecule of DNA contains 1 million base pairs. If the DNA synthesis at a replication fork occurs at a rate of 100,000 nucleotides per minute, how much time will theta replication require to completely replicate the molecule, assuming that

Why do ecosystems require continuous input of enery from the sun and what is the process that converts the sun energy chemical energy?

What barrier separates a cell from the external environment?

How many cells are produced in Mitosis

Which of the following shows the correct unit of weight listed from largest to smallest? A. Gram, microgram, milligram, kilogram B. Microgram, milligram, gram, kilogram C. Kilogram, gram, milligram, microgram D. Milligram, microgram, kilogram, gram

Choose the incorrect statement The generation of suprathreshold endplate potentials in multiple muscle fibers could be due to the increased frequency of action potential generation at the axon hillock of a single motor neuron.

Temperature can be used to measure a particle's chemical energy. ionic energy. kinetic energy. potiental energy.

What the similarities between mid ocean ridge and trenches?