Clues from geology and paleontology suggest that simple cells, or their precursors, arose about _____ years ago

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


Four Billion

Biology & Microbiology

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Although actinomycetes vary in many ways, they all share a common type of cell wall.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Individuals with diabetes (diabetes mellitus), in which blood glucose levels can be toxically high, are often recommended to avoid consuming sucrose (table sugar)

a) Why is sucrose not recommended for diabetics? b) Why would diabetics be urged to avoid foods that are high in starch? What will be an ideal response?

Biology & Microbiology

In meiosis DNA replicates during

A. prophase I. B. prophase II. C. interphase prior to meiosis II. D. interphase prior to meiosis I. E. both prophase I and prophase II.

Biology & Microbiology

Succession leads to the establishment of a(n)

A) community that consists of only one or two dominant species. B) mature community. C) ecosystem. D) community that has a limited number of natural resources. E) community that is inefficient in terms of its use of energy and nutrients.

Biology & Microbiology