Aspergillus is a mold that causes an allergic reaction when its spores are inhaled
Indicate whether the statement is true or false
True
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Refer to Figure 44-1 in the book. To which group are sponges more closely related?
A. choanoflagellates B. bilaterians C. equal relationship to both choanoflagellates and biletarians
There is strong evidence that two species of cliff-dwelling birds have nested in the same environment and fed in the same water for thousands of years, with each having stable population sizes. Based on this information, which of the following statements is the best conclusion?(A) One species is a better diver than the other species is. (B) The two birds compete for food. (C) One species will displace the other. (D) The two birds have different ecological niches that allow coexistence.
(A) One species is a better diver than the other species is. (B) The two birds compete for food. (C) One species will displace the other. (D) The two birds have different ecological niches that allow coexistence.
Each condensed chromosome contains a kinetochore within its centromere; kinetochores function _____.
A) to form the binding site, which keeps the sister chromatids together B) as spools on which the DNA can wind C) as chaperone proteins that organizes the multiple levels of coiling in mitotic chromosomes D) as a docking site for the microtubules that will help separate the chromatids E) as decondensing proteins that facilitate uncoiling once the nuclear division is complete
In a karyotype of a male, which of the following would indicate an abnormality?
a. one X chromosome and one Y chromosome b. three copies of chromosome 22 c. 22 pairs of autosomes d. a total of 46 chromosomes