How does the contractile vacuole in a paramecium help maintain homeostasis<span>? It pumps excess water out of the cell. ... Threadlike structures made of a protein called actin - it maintains cell shape, </span>help<span> build cilia and flagella, form centrioles in cell division.</span>
Nondisjunction is most likely responsible for the failure of a gamete to receive a copy of a particular chromosome.
What is non-disjunction?
When a pair of homologous chromosomes fails to segregate or separate at anaphase, both of the pair's chromosomes pass to the same daughter cell. This most likely happens during meiosis, but it can also happen during mitosis to create a mosaic individual. These are some potential causes of nondisjunction, while the exact cause or causes are unknown. Growing maternal age is linked to trisomy 21 and trisomy 18 fetuses and newborns, indicating that the mother's age may be a significant etiological component. Chromosomal structural defects such translocations and pericentric inversions might hinder chromosome pairing during meiosis and encourage nondisjunction.
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I would say the answer is A I really hope this helps! :)
A vector of a zoonotic pathogen differs from a host of the pathogen in that it is not affected by the pathogen.
<h3>What are vectors and pathogens?</h3>
Vectors are organisms which serve as carriers of disease-causing organisms known as pathogen. Vectors usually serve as transport or transit mechanisms by which diseases spread.
Pathogen are organisms that cause disease. A zoonotic pathogen is a pathogen that can move from non-human animals to humans.
The vector of a zoonotic pathogen differ from a host of the pathogen in that the vector is not affected by the pathogen and the vector is also non-human.
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