What do you mean by desertification???

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The hypothesis of continental drift states that earth's continents, which are located on tectonic plates, move relative to each other. which of the following is true of the movement of the tectonic plates? a. tectonic plates only move once every million years. b. they move at a rate of approximately 5 centimeters per year. c. tectonic plates never move, only the continents located on them do. d. their movements are very rapid and occur at random times.

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?