During meiosis crossing over occurs at the pachytene stage, when homologous chromosomes are completely paired. At diplotene, when homologs separate, the sites of crossing over become visible as chiasmata, which hold the two homologs of a bivalent tighter until segregation at anaphase.
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Answer:
Nucleoid
Explanation:
I just know by studying cells
Answer:
D
Explanation:
Lava at Earth's surface flows over rocks.
Answer:heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic).
Explanation:
The system is responsible for the flow of blood, nutrients, oxygen and other gases, and as well as hormones to and from cells.
