It seem like there are information missing on the question posted. Let me answer this question with all I know. So here is what I believe the answer is, The adult, or sporophyte, phase is the main phase of an angiosperm's life cycle . As with gymnosperms, angiosperms are heterosporous. Therefore, they generate microspores, which will produce pollen grains<span> as the male gametophytes, and megaspores, which will form an ovule that contains female gametophytes.</span>
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Answer:
Different versions of the same gene are called alleles...
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The exosphere and the ionosphere
In human body temperature is kept fairly constant by automatic responses controlled by hypothalamus. It secrete neurohormone , called as hypothalamic releasing hormone which stimulate and secrete pituitary hormones. Hypothalamus is responsible for the control of body temperature.