What type of selection would include the evolution of a long neck in giraffes?
A) stabilizing selection
B) directional selection
C) diversifying selection
D) disruptive selection
B
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You observe variation in the auditory signal that males use to attract females. Which of the following would be true if the signal is an accurate indicator of male quality?
a. The highest-quality males have the most common form of the signal. b. The highest-quality males have the most extreme form of the signal. c. Male quality is unrelated to signal variation. d. Only the highest-quality females prefer the highest-quality males. e. Females will use multiple signals to identify the highest-quality males.
5'-CCG-3' is a codon that specifies which amino acid?
Help with this one please? Thank you.
Suppose a marine microbiologist wanted to assess the microbial community in a milliliter of sea water. Which of the following technique(s) may be useful to help them enumerate a specific genus or type of microbe?
A. Most probable number (MPN) technique B. DAPI nucleic acid stain C. Catalyzed reported deposition-FISH (CARD-FISH) D. Fluorescence activated cell sorting (FACS)
Researchers have identified several factors that have increased the number of threatened and endangered species. Identify the causes, as defined by the percentage (%) of species affected.Use the following word bank: pollution, overexploitation, disease, exotic species, habitat loss.
A:________B:________C:________D:________E:________
What will be an ideal response?