Two common species of frogs from the genus bombina (b. bombina and b. variegata) live in similar latitudes and ecological conditions, but in two different regions, central and eastern europe. in a narrow strip between these regions, scientists observed a third species, which might have been a hybrid between the former diverging populations of the ancestral species. what evolutionary process might be responsible for the speciation in bombina? top of form
a. allopatric speciation
b. parapatric speciation
c. sympatric speciation
d. none of the above
e. bottom of form

Turtle hatchling survivorship rate is low in many turtle species due to predation. amanda researched the predatory rate on a species of turtle eggs in the red river. the eggs were harvested from trapped turtles and the egg's cloaca film (reproductive discharge) was either washed off or left on once gathered. research suggests that predators use the female's cloaca scent to locate the eggs. the eggs were only handled when wearing gloves and then reburied along islands where the turtles were trapped. the nests were monitored by cameras and manually on foot and data on nest predation were recorded. a. based on the experimental design, what is the dependent variable? b. based on the experimental design, what is the independent variable? c. based on the experimental design, what is the control?

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

What does natural resource management aim at ?