Attached earlobes are recessive to free earlobes. What is the probability of having a child with attached earlobes when an individual with attached earlobes mates with an individual heterozygous for free earlobes?
A) 0%
B) 25%
C) 50%
D) 75%
C
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Birds excrete their nitrogenous wastes in the form of
A) uric acid. B) ammonia. C) amine groups. D) urea. E) amino acids.
All virus particles (virions) have a
A. A genome surrounded by proteins B. Ribosomes and nuclei C. A genome surrounded by cytoplasm but no organelles D. Nuclei and mitochondria E. Golgi and a genome
The ability for cancer cells to divide indefinitely is made possible because they:
A) rebuild their telomeres after every cell division. B) rebuild their centromeres after every cell division. C) break down their centromeres after every cell division. D) break down their telomeres after every cell division. E) avoid interphase during cell division.
Which of the following is an example for Batesian mimicry?
a. paper wasps and yellow jackets that both have black and yellow stripes b. defenseless spiders that look like ants c. crab spiders that mimic the color of flowers on which they live d. Heliconius butterfly species that share warning patterns and that are both unpalatable