What process created the oxygen in the atmosphere of the early earth

What are closed-lipid bilayer spheres that encapsulate ingredients, target their delivery to specific tissues of the skin, and control their release?

Sunflowers seem to follow the path of the sun as it travels across the sky during the day. Plants bending toward or following light is a response called A) hydrotropism. B) photosynthesis. C) phototropism. D) thigmotropism.

The production of mature eggs is called

What is haploid chromosome?

Explain the process of evolution through isolation that results in speciation

What factors influence the impact a population has on its environment?

What kind of bonds form between the oxygen atoms of one water molecule and the hydrogen atoms of another water molecule

Salamanders brought into a new ecosystem that is colder than its all ecosystem the salamander cannot survive in the cold temperature in days which is the best way to describe a salamander in the new ecosystem

Trace a drop of blood from the left atrium to the left hallucinating and back to the right atrium

Besides the ability of some cancer cells to divide uncontrollably, what else could logically result in a tumor?