Volatile chemical substances that elicit specific responses in other members of the same species are referred to as
A. hormones.
B. pheromones.
C. transposons.
D. pectines.
E. spicules.
B. pheromones.
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Most of the active functions of plasma
membranes are carried out by
a. cholesterol. b. proteins. c. hydrophilic heads. d. hydrophobic tails. e. carbohydrates
According to Watson and Crick's model, DNA consists of two strands of nucleotides that are antiparallel. What does this mean? What evidence supports the antiparallel nature of the strands?
What will be an ideal response?
How do planarians survive without a circulatory system? What will be an ideal response?
A particular gene that controls seed coat color in peas also determines the susceptibility of these peas to a particular
disease. This situation is referred to as: a. variegation. b. polygenic inheritance. c. codominance. d. pleiotropy. e. incomplete dominance.