A population of ground squirrels has an annual per capita birth rate of 0.06 and an annual per capita death rate of 0.02. Estimate the number of individuals added to (or lost from) a population of 1,000 individuals in one year.
A) 120 individuals added
B) 40 individuals added
C) 20 individuals added
D) 400 individuals added
E) 20 individuals lost
Ans: B) 40 individuals added
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Which one of the following is a main function of many proteins?
A. detoxification B. genetic coding C. enzymatic activity D. energy source E. insulation
A plot of population size vs time that displays a J-shape is indicative of
A. r-selection. B. exponential growth. C. logistic growth. D. K-selection. E. parasitism.
Quorum sensing produces changes in gene expression.
Answer the following statement true (T) or false (F)
Select the incorrectly-matched osmoregulatory organ and the organism that uses it.
A. Nephridia-annelids B. Malpighian tubules-insects C. Nephrons-sea urchins D. Kidney--mammals E. Protonephridia-flatworms