Gametes develop in the multicellular haploid gametophyte (from the Greek phyton, “plant”). Fertilization gives rise to a multicellular diploid sporophyte, which produces haploid spores via meiosis. This type of life cycle is called a haplodiplontic life cycle
This phenomenon can be explained by Allen's rule. It says that the body proportions and shape may vary in different climates. The temperature decreases as the latitude increases, so in the northern region is much colder. Animals must preserve heat in such conditions. So, exposed surface areas of the body, such as the ears, feet, and tail, are usually minimized to minimize heat loss in the cold climate. <span>Therefore, northern species often have smaller ears, feet, and tail than the southern species. </span>
The Term is called Niche Full distance of physical and
biological setting in which an organism lives and the way in which the
organisms uses those conditions. Causing species to divide resources,
competition helps determine the number and kinds of species in a community and
the niche eacthcies occupies.
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1990. Do not let the partial collapse during 1980s confuse you.
