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Questions in biology

[Homework Help] According to modern ideas, the first step in the origin of life was _______________.

[Homework Help] Is it true or false that green algae is not only a primary food producer but also a producer of oxygen? Explain your answer.

[Homework Help] Cyanobacteria fossils can be dated back to the __________, while fossils of ichthyosaurs indicate that they lived during the __________.

[Homework Help] Almost every cell in the human body is replaced every few years through the process of _____.

[Homework Help] What is the change in number of individuals in a population over time? A. Population decrease B. Population stability C. Population growth D. Population resistance

[Homework Help] What is another name for blood?

[Homework Help] Where do the cranial nerves originate? Where do the spinal nerves originate?

[Homework Help] What are the functions of receptors in our body? Think of a situation where receptors do not work properly. What problems are likely to arise?

[Homework Help] When does a wheel and axle have a mechanical advantage greater than one?

[Homework Help] Which of the following best describes deflation as it relates to Earth science? A. High tides caused by full moons B. An avalanche caused by skiers C. The lowering of land surface caused by wind D. Beach erosion caused by high tides