_____________ were the first living things to convert Oxyen (O2) to Carbon dioxide (CO2) ? a process called respiration?

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


Ans: Bacteria

Evolved from ancient bacteria, and were the first organisms that could take in Oxygen and convert it to Carbon dioxide.

Biology & Microbiology

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Folding domains typically range in length from ____________ amino acids

A. 1,000 to 1,5000 B. 10 to 20 C. 200 to 275 D. 50 to 80 E. 25 to 100 or more

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Which of the following yeasts is not pathogenic to humans?

A. Saccharomyces B. Cryptococcus C. Candida D. Saccharomyces and Cryptococcus

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All ecosystems

A. are entirely self-sufficient. B. None of the answer choices is correct. C. need a source of external energy. D. stay exactly the same once mature. E. consist of only living organisms.

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The placement of prokaryotes into major clades within the domains Archaea and Bacteria has been based on __________.

a. molecular comparisons b. fossil records of prokaryotes that have been recently discovered c. Gram stain results and colony characteristics when grown on solid media d. shape and motility e. nutritional modes and ecology

Biology & Microbiology