Migratory birds in the Northern Hemisphere most likely head to tropical overwintering grounds because ____
a. they are looking for appropriate sites for egg-laying
b. of seasonal changes in the abundance of predators
c. they are looking for appropriate breeding sites
d. of seasonal changes in food supplies
e. they are ectotherms and cannot withstand cold temperatures
ANSWER: d
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____ are the most diverse animal phylum and ____ are the most diverse animals in this phylum
a. Cnidaria; insects b. Arthropods; crustaceans c. Echinoderms; insects d. Birds; ducks e. Arthropods; insects
The rash of secondary syphilis
A. can last for months. B. does not impair function. C. causes severe itching. D. only lasts a few days. E. is intensely painful.
Some protists use multiple fission (cell division preceded by several nuclear divisions) as a means of reproduction. Multiple fission is also referred to as
A. budding. B. syngamy. C. intermediary meiosis. D. schizogony. E. zygotic meiosis.
In Drosophila, the sex of a fly with the karyotype ________ is male
A) XYY:4A B) XO:2A C) XXX:2A D) XXY:2A E) XX:2A