Cyanobacteria can derive nutritional carbon molecules by consuming those from other organisms, or by producing them from inorganic carbon (atmospheric CO2) through photosynthesis. In which of the following ecological groups would they also be considered?

A. obligate anaerobes
B. both heterotrophic and autotrophic
C. chemotrophic
D. autotrophic
E. heterotrophic


B. both heterotrophic and autotrophic

Biology & Microbiology

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In Drosophila, two maternal transcripts that are distributed evenly throughout the oocyte prior to fertilization are

A) caudal and knirps. B) bicoid and nanos. C) caudal and hunchback. D) sevenless and even-skipped.

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If one parent has blood type A and the other parent has blood type B, then which of the following

blood types is possible in the children? a. only AB b. A and AB c. B and AB d. A, B, AB, and O e. O only

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A botanist conducted an experiment to test the effect of light on plants. Fifty plants of a flowering species were grown for 60 days under different lengths of artificial daylight. Flowers could be white or pink based on the parent plant genes

The amount of water and fertilizer provided was constant. At the end of the experiment, the size of each leaf for all plants is measured. What is the dependent variable in this experiment? A) duration of artificial daylight B) flower's color C) leaf's size D) duration of the experiment

Biology & Microbiology