Which organisms possess an open circulatory system?
a. Annelids
b. Arthropods
c. Sharks
d. Gorillas
e. Cephalopods
b
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If a population of short-lived, annually reproducing fish is exposed for several years in a row to a chemical toxin that kills 5% of them each year, what might you expect to happen if the population is re-exposed to the chemical several years later?
a. much higher death rate. b. lower death rate. c. about the same death rate. d. no mortality—they will be immune to the toxin.
When one species reduces or adversely affects the population of another, but the affected species has no influence in return, the relationship is referred to as ________
Fill in the blank(s) with correct word
What is the Ames test, and how does it work?
What will be an ideal response?
If a DNA sequence of a gene reads, in part, TAACAGGTCA, what is the sequence of the complementary strand of DNA?
A) ATTGTCCAGT B) AUUGUCCAGU C) UUACAGGUCC D) CTTGTGGACC