Popular approaches in sterilizing ballast tanks are:
1) filtration and high pressure chambers
2) through UV light or heat treatments
3) removal of oxygen from ballast water (asphyxiation)
4) Use of biocides or chemical treatments
Answer:
The correct answer is 128 cells
Explanation:
The explanation is in the picture there
A Sertoli cell (a kind of sustentacular cell) is a "nurse" cell of the testicles that is part of a seminiferous tubule and helps in the process of spermatogenesis; that is, the production of sperm.
It is activated by follicle-stimulating hormone (FSH) secreted by the adenohypophysis, and has FSH receptor on its membranes. It is specifically located in the convoluted seminiferous tubules (since this is the only place in the testes where the spermatozoa are produced). Development of Sertoli cells is directed by the testis-determining factor protein.
Answer:
C) Most of the light from Polaris is absorbed by different objects in space
