Which kind of bird was dominant during the Mesozoic era?

a. enantiornithines
b. passerines
c. neornithes
d. ornithurines


Ans: a. enantiornithines

Biology & Microbiology

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Enzymes involved in metabolism are most likely regulated via _____

A. feedback inhibition B. acetylation C. methylation D. none of the answers are correct

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Which of the following models of growth takes

place when the amount of available resources is not limiting?

a. arithmetic growth b. logistic growth c. logarithmic growth d. exponential growth e. exponential growth and arithmetic growth

Biology & Microbiology

The ATP synthase Fo complex is inhibited by the antibiotic ________, as indicated by the "o."

Fill in the blank with correct word.

Biology & Microbiology

Which of the following changes is least likely to arise from a point mutation in a regulatory region of a gene?

(a) a mutation that changes the time in an organism's life during which a protein is expressed (b) a mutation that eliminates the production of a protein in a specific cell type (c) a mutation that changes the subcellular localization of a protein (d) a mutation that increases the level of protein production in a cell

Biology & Microbiology