The table below shows population data for a particular country in 2010: Population (millions) 40.5
Births (per 1,000) 30
Deaths (per 1,000) 4
Total Fertility Rate 3.3
Infant Mortality Rate
(per 1,000 births) 11

Five years later, the total fertility rate for this country is 2.4. Which of the following statements could be a possible reason for this change?
The total fertility rate decreased because there must have been an increase in the infant mortality rate.
The total fertility rate decreased because the economy forced many couples to delay when they will have children.
The total fertility rate decreased because the infant mortality rate is greater than the death rate.
The total fertility rate decreased because governmental policies were implemented to provide housing for low income families.

Two male mice, which we will call male a and male b, are both phenotypically normal. male a was from a litter that contained half phenotypically normal mice and half dwarf mice. the mother of male a was known to be homozygous for the normal igf2 allele. male b was from a litter of eight mice that were all phenotypically normal. the parents of male b were a phenotypically normal male and a dwarf female. male a and male b were put into a cage with two female mice that we will call female a and female b. female a is a dwarf and female b is phenotypically normal. the parents of these two females were unknown, although it was known that they were from the same litter. the mice were allowed to mate with each other, and the following data were obtained: female a gave birth to three dwarf babies and four normal babies. female b gave birth to four normal babies and two dwarf babies. which male(s)mated with female a and female b? male a with both females male a with female b, and male b with female a male a with female a, and male b with female b could not be determined male b with both females

Apair of fruit flies reproduces and has 1,000 offspring. all 1,000 of the offspring have the alleles gg. what is the most likely combination of alleles for each parent

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?