Explanation:The tetrahedral shape is formed by the electrons repulsing one another, which forms the tetrahedron—the shape in which all the electrons are as far away from one another as possible.
Examples include methane (CH4) and ammonium(NH4+).
Methane has a central carbon atom ringed by four hydrogens, which form the "spokes" of the tetrahedral molecule.
Tetrahedral molecules are nonpolar if the four surrounding atoms are the same, in the cases of methane and ammonium, and have a bond angle of 109.5˚.
However, tetrahedral molecules can also be polar if they are like chloroform (CHCl3). The central atom has four electron domains, but they are differently sized.
Homologous or sister chromatids
<span>Variation among individuals in a species is real and important.</span>
REPRODUCTION (either sexual or asexual) is found in all unicellular organisms.
The penis delivers sperm<span> through the urethra. The two testicles (or testes) produce</span>sperm<span> and the male sex hormone testosterone. Nest to each testicle, the epididymis is a light‑colored tube where </span>sperm<span> is stored. ... In the human </span>reproductive<span> process, two kinds of sex cells, or gametes, are involved.
Though i must say, this is quite inapprrporiate.
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