3.) Which of the following would be an appropriate measure of population density?
A) the number of African elephants (Loxodonta africana)
B) the number of African elephants (Loxodonta africana) and the grasses on which the elephant feeds per square mile
C) the number of African elephants (Loxodonta africana) and humans per square mile
D) the number of African elephants (Loxodonta africana) per square mile

4) Diseases can spread rapidly in cities. If a disease kills many people in a city but fewer in a rural area, this is an example of
A) exponential population growth.
B) density-independent factors.
C) logistical population growth.
D) density-dependent factors.

Which table best shows the impacts resulting from human activity? impact of human activities human activity impact forest area cleared to construct an airport increase in oxygen level vegetation cleared to construct an oil mine increase in pollution impact of human activities human activity impact forest area cleared to construct an airport increase in sound pollution vegetation cleared to construct a power plant contamination of water impact of human activities human activity impact beehives cleared from urban areas increase in vegetation dams constructed on a river increase in fish population impact of human activities human activity impact beehives cleared from urban areas increase in bird population dams constructed on a river better quality of water

Neelaredoxin is a 15-kda protein that is a gene product common in anaerobic prokaryotes. it has superoxide-scavenging activity, and it is constitutively expressed. in addition, its expression is not further induced during its exposure to o2 or h2o2 (silva, g., et al. 2001. j. bacteriol. 183: 4413–4420). which of the following statements best describes neelaredoxin synthesis? a-neelaredoxin is produced at all times; levels are constant even when exposed to o2 or h2o2.b-neelaredoxin is produced at all times; exposure to o2 or h2o2 increases expression. c-neelaredoxin is produced at all times; exposure to o2 or h2o2 decreases or prevents expression. d-neelaredoxin is only produced when there is exposure to o2 or h2o2.

What is the main fuel source for the work of the cell