The cells are epithelial cells of the seminiferous tubules. They are connected with tight junctions the break and reform as the developing sperm cells move from the basolateral side to the lumen of the seminiferous tubules. These cells respond to follicle-stimulating hormone and release inhibin, which inhibits the release of FSH, and androgen-binding protein.

1. b.

2. d.

3. a.

5. d.

6. c.

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answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.

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