Why is the goose rolling a beer can back to her nest?
a. She's a silly goose.
b. She's using the beer can as part of the nest border to protect the eggs.
c. She's trying to get nutrition from any source she can.
d. She's exhibiting a fixed action pattern that directs her to retrieve any item that even vaguely resembles an egg.
e. She's a first-time mother and is in the process of learning the difference between eggs and non-eggs.
Answer: d. She's exhibiting a fixed action pattern that directs her to retrieve any item that even vaguely resembles an egg.
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Stacy has a dog that has a tumor on its back leg. This means the _______________
a. dog has cancer b. dog has an abnormal mass of cells c. cells are metastasizing d. dog has been exposed to a carcinogen
The function of helicase enzymes is to
a. break hydrogen bonds and unwind the two strands of the DNA molecule prior to replication. b. rewind the two DNA molecules after replication. c. remove bases that might have been inserted incorrectly. d. seal new short stretches of nucleotides into one continuous strand. e. fragment old DNA that is no longer of use to the cell
Which of the following types of radioactive particle has the highest LET?
a) Alpha particle b) x-ray c) gamma-ray d) proton