Biology, 29.01.2020 23:42 hannahboohoo120
The blood group b is almost absent in native americans, whose ancestors arrived in very small numbers about 10,000 years ago. which factor is responsible for this phenomenon?
a, migration effect b, founder effect c, bottleneck effect are the options
Answers: 1
Biology, 21.06.2019 18:30
Which of the following represents the chemical reaction of hydrazine and hydrogen peroxide to produce nitrogen and water? a. nitrogen + hydrogen peroxide → hydrazine + water b. nitrogen + water → hydrazine + hydrogen peroxide c. hydrazine + hydrogen peroxide → nitrogen + water d. water + hydrogen peroxide → nitrogen + hydrazine
Answers: 3
Biology, 21.06.2019 22:00
Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.
Answers: 1
Biology, 22.06.2019 02:30
{answer found. it's (3 ) }which statement describes the cell cycle? (1)the cell cycle is a process in which one cell divides into four genetically different cells. (2)the cell cycle is a process in which one cell divides into two genetically different cells. (3)the cell cycle is a process in which one cell divides into two genetically identical cells. (4)the cell cycle is a process in which one cell divides into four genetically identical cells.
Answers: 1
Biology, 22.06.2019 04:30
This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment
Answers: 1
The blood group b is almost absent in native americans, whose ancestors arrived in very small number...
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