Microfilaments forms when the contractile rings during cytokinesis are functioning .
Microfilaments are formed during cytokinesis, the last step of cell division, the contractile ring is composed of filamentous actin (F-actin) and the motor protein myosin-2, along with additional structural and regulatory proteins.
The contractile ring is responsible for cytokinesis in many eukaryotic cell types, and is thought to contribute to cell division by 'squeezing' the cell into two. The contractile ring forms under the surface of the plasma membrane and is linked to the plasma membrane such that, when it constricts, it creates a cleavage furrow that partitions the cell in two.
Hence ,B is correct option
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Answer:
These muscles promote good control of the downstroke and upstroke movements of the wings for flight. It allows them to make powerful strokes and this leads to smoother gliding during flight.
The existence of pelvic bones and toenails in manatees and elephants
suggests that manatees and elephants evolved from the same land animal
best supports evolution theory.
<h3>What is Theory of Evolution?</h3>
It states that evolution relies on natural selection and involves changes
which occurs in the features of organisms over a long period of time.
The elelphant and manatee having pelvic bones and toenails means they
evolved from the same land animal.
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Answer:
by mimicking disease agents and stimulating the immune system to build up defenses against them.
Explanation:
Answer:
C. Exocytosis uses transport vesicles to export materials from the cell
Explanation:
Exocytosis is the reverse process of endocytosis including the expulsion of the material that is membrane -encapsulated (material is packaged in the vesicles ) inside the cell out of the cell. It has following steps :
1) The cell forms a vesicle around a material which is to be expelled.
2) The vesicle is transported to the cell membrane.
3) The vesicle membrane fuses with the cell membrane and releases the contents from the cell.
Hence option C. Exocytosis uses transport vesicles to export materials from the cell IS THE RIGHT OPTION.
