Answer:
Answer is A-B toxin.
Explanation:
A membrane-disrupting toxin is toxin that affect the cell membrane. The effect of its secretion could be by interrupting the phospholipid layer or through pores formation on the membrane.
Membrane- disrupting toxins are regarded as exotoxins. Examples are leukocidin and hemolysin which their effects cause leakages of the cytoplasmic content and lysis of the cell, through the formation of pores on the cell membrane.
The A-B toxin are produced by the proteins of pathogenic organisms such as the bacteria. Example is botulinum toxin.
Answer & explanation:
Gills are an adaptive structure for fish and other aquatic animals to survive in the aquatic environment.
They are blade-shaped and highly vascularized, allowing gas exchanges between the ambient water and the animal's blood.
Water enters the mouth and is led through the gills, being eliminated by gill slits, then oxygen is distributed in the blood to the animal's body.
Answer:
The cell was first discovered and named by Robert Hooke in 1665. He remarked that it looked strangely similar to cellula or small rooms which monks inhabited, thus deriving the name. However what Hooke actually saw was the dead cell walls of plant cells (cork) as it appeared under the microscope.
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