The spindle fibres of a chromosome failed to separate a chromosome to sister chromatids during anaphase of mitosis resulting in an additional sister chromatid being pulled into a Daughter cell, hence having 39 chromosomes; and the other Daughter cell having one less chromosome.
The myosin head separates from actin as a result of ATP binding. The intrinsic ATPase activity of myosin then transforms ATP into ADP and Pi. The myosin head's angle is altered into a cocked state by the energy generated during ATP hydrolysis. The myosin head is now ready to move in the future.
The myosin protein is in a high-energy conformation when the head is cocked. At the end of the power stroke, the myosin head is in a low-energy position because this energy has been used up during the power stroke. ADP is released following the power stroke, but the cross-bridge is still there and actin and myosin are joined together.
Since ATP is readily available, the cross-bridge cycle can repeat, and muscular contraction can go on as long as ATP is there.
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Answer:
Biogeography: Animals can come from certain areas and move to other areas causing their adaptations and therefore traits to change.
Radioactive Dating: The time zone fossils come from can be dating to certain times where there species may have changed. This can also be said for Fossils.
Comparing anatomy and development: There characteristics of certain biological features can differentiate species and their traits to determine which animal has came from another and other relative species.
Genetics and Molecular Biology: Genes can be passed onto on another and looking at genes passed down from one species to the next determines evolution of traits.
Answer:
a & c.
Explanation:
small local populations depend on a specific food source. If the food source is depleted because of the existing populus, chances are, there will be no reproduction. If the populus, does not look beyond their boundaries for food, the species will die.
Answer:
Geosphere and atmoshphere
Explanation:
