<em>Answer: Volcanic landforms tend to be cinder cones, stratovolcanoes, volcanic domes, and calderas.
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<em>Cinder cones are small volume cones consisting predominantly of tephra that result from strombolian eruptions. ...
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<em>They are actually fall deposits that are built surrounding the eruptive vent.</em>
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Chromosomes exchange genetic material in step 3.
<h3><u>Explanation</u>:</h3>
The meiosis is the type of cell division that takes place for gametogenesis. The meiosis has two phases - meiosis I and meiosis II.
The meiosis I has the events like crossing over and independent assortment which leads to the mixing of genes between homologous chromosome pairs and separation of homologous chromosome pairs. So the two cells that are produced from the meiosis I are genetically different. The step 3 shows the crossing over of prophase 1 of meiosis I. So, it shows the genetic difference between the offsprings and leads to genetic variation.
Every person has two copies of each gene, one inherited from each parent. Most genes are the same in all people, but a small number of genes (less than 1 percent of the total) are slightly different between people. Alleles are forms of the same gene with small differences in their sequence of DNA bases. These small differences contribute to each person’s unique physical features.
Hope this helps
Answer:
One fertilizes the egg, and the other combines with the two polar nuclei.
Explanation:
