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Animal life cycles have meiosis followed immediately by gametogenesis. Gametes are produced directly by meiosis. Male gametes are sperm. Female gametes are eggs or ova.
The plant life cycle has mitosis occurring in spores, produced by meiosis, that germinate into the gametophyte phase. Gametophyte size ranges from three cells (in pollen) to several million (in a "lower plant" such as moss). Alternation of
Answers is
(Spore)
Newton's three laws of motion may be stated as follows: Every object in a state of uniform motion will remain in that state of motion unless an external force acts on it. Force equals mass times acceleration. For every action there is an equal and opposite reaction.
<span>New kingdoms were needed that reflected our growing knowledge of the differences between living organisms.</span>
Neutrons have no electrical charge
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The phenomenon of endosymbiosis gave rise to more multicellular organisms.
Life on Earth is known to have started from prokaryotes. Prokaryotes were simple, unicellular organisms which managed to survive the harsh conditions of the Earth.
The theory of endosymbiosis provides evidence that with the passage of time, the bigger prokaryotes began engulfing the smaller prokaryotes. As a result, multicellular organisms were formed. Organelles like the mitochondria and chloroplast support the validity of this hypothesis.
