Which one of these is a nitrate?
a. NH4-
b. NH2
c. NO2-
d. SH
e. NO3-
Ans: e. NO3-
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At what size of predator population does the rate of prey population growth reach zero?
a. 25 b. 30 c. 35 d. 40
The 23 paired corresponding chromosomes, one from each parent are called ____
a. haploid pairs b. homologous chromosomes c. “n” pairs d. X and Y chromosomes e. sex chromosomes
If the probability of a point mutation in a species were 10-8 per base pair per generation and each gamete in that species contained 3 x 10-8 base pairs, how many new point mutation would you expect per gamete per generation?
a) 3 b) 6 c) 3 x 10-8 d) 10-8 e) 3 x 108
Below are figures for the percentage allocation of production to shoots (above-ground parts) for four different species. Which of these is likely to be an annual herbaceous species?
A) 80-90% B) 70-80% C) 60-70% D) 20-60%