What was the most important adaptation of the reptiles and birds to life on land?

A. The impermeable egg
B. The shelled egg
C. The external egg
D. The amniotic egg


Answer: D

Biology & Microbiology

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In E. coli the enzyme responsible for creating unsaturated bonds from saturated ones in the fatty acids of the cell membrane is ________.

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

Biology & Microbiology

Water held behind a dam has a large amount of ________ energy

Fill in the blank(s) with correct word

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Of the following, which group exhibits a diverse morphology, forming unicells, filaments, and sheets?

a. diatoms b. euglenoids c. green algae d. brown algae e. dinoflagellates

Biology & Microbiology

Which of the following is found in both archaeal and eukaryotic genomes?

A. chromatin fibers B. histones C. heterochromatin D. euchromatin E. nuclear envelope

Biology & Microbiology