Which of the following is a parasitic excavate protist with a single mitochondrion and an undulating membrane?
A. Trypanosome
B. Zooplankton
C. Euglenid
D. Metamonad
E. Photoautotroph
Answer: A
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Humoral immunity involves all the following except:
A) antibodies. B) antigens. C) NK cells. D) plasma cells.
Annual growth rings are formed in woody stems principally through the activities of the ____
a. cork cambium b. cortex c. vascular cambium d. apical meristem e. endodermis
The smallest biological unit that can evolve is the ______.
a. phylum b. population c. individual d. species
In Drosophila, flies that are XXY but have a normal diploid set of autosomes have been found. Such XXY chromosome constitutions have also been found in humans. The sex of such individuals is expected to be:
A. female in both Drosophila and humans. B. male in Drosophila but female in humans. C. male in both Drosophila and humans. D. intersexes in Drosophila and males in humans. E. female in Drosophila but male in humans.