Which of the following illustrates altruism?
A) Parent birds spend much of their time and energy feeding their young.
B) A mother bird pretends to be wounded to distract a predator away from her young.
C) Males sing to attract females as mating partners.
D) Birds of a different species care for a cuckoo egg.
E) Parent birds clean out their nests.
B
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Viruses that are polyhedrons with 20 sides are said to have ________ symmetry.
Fill in the blank(s) with the appropriate word(s).
A decrease in body temperature to ___ degrees
Celsius or below alters brain function.
a. 39 b. 38 c. 37 d. 36 e. 35
What characteristics does an organism have to possess to be a good genetic model?
What will be an ideal response?
What is the likely consequence of a mutation that alters the branch point within an intron?
A. failure of snRNAs to combine with protein and form snRNPs B. no exon shuffling C. no effect, since introns are not expressed D. failure to form a lariat E. failure of snRNPs to recognize the 5' end of intron