What step occurred first in the evolution of life?

a. formation of DNA
b. formation of protein-RNA systems
c. formation of membrane-bound proto-cells
d. spontaneous formation of organic compounds
under abiotic conditions
e. formation of ATP


Answer: d

Biology & Microbiology

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Compare and contrast generalized transduction with specialized transduction

What will be an ideal response?

Biology & Microbiology

Why is intelligent design not a scientific explanation for the wide variety of life on Earth?

a. It suggests that evolution is “just a theory.” b. It says that evolution can explain the origins of life on Earth. c. It suggests that individuals can evolve on purpose. d. It posits that an unknown or supernatural force created life, and thus cannot be measured.

Biology & Microbiology

Cell-mediated immunity most directly involves the destruction of diseased and/or cancerous cells by ____________

Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

The result of binding a signal molecule to its receptor is

A) production of a protein by the target cell, followed by cell death. B) cell division. C) signal transduction.

Biology & Microbiology