Ahuman female has a special pair of chromosomes that are represented by the letters a) xx. b) xy. c) yy. d) xz.

A) XX

Explanation:

Each human cell is diploid (2n) and possesses 23 pairs of chromosomes. Out of 23 pairs, 22 pairs are autosomes and 1 pair is sex chromosomes. Sex chromosomes are designated by alphabet X and Y. In human females, each cell has two XX chromosomes, whereas males have one X and one Y sex chromosome.

maybe because its impossible for balloons to lift a whole entire house.

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.