Author: Anonymous

You are given an unknown organism to identify. It is unicellular and heterotrophic. It is motile, using many short extensions of the cytoplasm, each featuring the 9 + 2 filament pattern. It has well-developed organelles and two nuclei, one large and one small. To which of the following groups does this organism likely belong?

Many parasitic members of the excavates lack plastids and have highly reduced mitochondria. Which of the following statements explains these observations?

The observation that both charophytes and green plants contain chlorophylls a and b is more consistent with which of the following claims?

Immature seed cones of conifers are usually green before pollination, and flowers of grasses are inconspicuously colored. What does this indicate about how they are pollinated?

In onions (Allium), cells of the sporophyte have 16 chromosomes within each nucleus. How many chromosomes should be in an endosperm nucleus?

Which of the following characteristics is most likely found in plaque on human teeth if plaque is a biofilm?

Mitochondria are thought to be the descendants of certain alpha proteobacteria. They are, however, no longer able to lead independent lives because most genes originally present in their genome have moved to the nuclear genome. Which phenomenon accounts for the movement of these genes?

Which statement about the domain Archaea is accurate?

Huskium is a made-up element with symbol Hk and a molar mass of 82.67 g/mol. Consider the reaction below. Molar masses in g/mol are given below each substance.                    2 Hk(NO3)3 +  3 Na2S   

N3-