A laboratory experiment followed the growth of a flour beetle (Tribolium sp.) population over time. At first, the population increased dramatically, but later the growth slowed and the population size leveled off
Although food (the wheat flour in which they live) was still abundant, the flour beetles resorted to eating their own eggs when population densities got high. What can we conclude about cannibalism in this species?
A) It is a density-dependent means of population control.
B) It has no effect on the growth of the population, as food scarcity is clearly the limiting factor.
C) It is a density-independent means of population control.
D) We cannot reach any conclusions based on the information provided.
E) It is clearly maladaptive, as populations always do best when their densities increase as much as possible.
A
You might also like to view...
True or false: it is impossible to override a genetic predisposition to a disease such as skin cancer
A. true B. false
Assume each of the following letters represents an amino acid. What type of gene mutation occurred to produce the following protein sequence?
Normal: JAYBIRDCATPAW Mutated: JAYBIRDBATPAW A. nonsense B. missense C. silent D. sense E. frameshift
In an emergency room, a patient is found to have a depressed breathing rate, and subsequently low oxygen levels in the tissues. He is put on oxygen, but his respiration rate continues to be too low, and his oxygen saturation level in his tissues also continues to be too low. Will increasing the oxygen levels that he is receiving correct his low breathing rate?
A. Yes, because normal oxygen levels in the tissues will cause his breathing rate to return to normal. B. Yes, because the increased oxygen levels in the lungs will stimulate the breathing rate to return to normal. C. No, because the oxygen will be immediately used up to the previous deficit. D. No, because the brain does not use oxygen levels to regulate breathing.
Which of the following structures is the smallest?
A) DNA molecule B) chloroplast C) mitochondrion D) lipid bilayer