In certain organisms, like humans, there are two morphologically distinct types of gametes: (1) the male gamete (i.e. sperm cell) and (2) the female gamete (i.e. ovum). The male gamete is smaller in size and motile whereas the female gamete is several times bigger and non-motile. The haploid condition of the two gametes is essential so that at fertilization during sexual reproduction the integrity of the chromosomal number is maintained throughout generations.
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In aerobic respiration.there are stages in it.but I think you are looking for word "Krebs cycle"
It a comet that streaks through earth atmosphere. Cause more than 90 percent of meteorites are of rock, while the reminder consist wholly or partly of iron and nickel
I believe the correct answer is A.
