Smoking, drinking alcohol ,poor nutrition and HIV lowers our immune system .
Plz. mark me as brainliest!✌️✌️
Okay so, the mitochondria are shaped perfectly to maximize their productivity. They are made of two membranes. The outer membrane covers the organelle and contains it like a skin. The inner membrane folds over many times and creates layered structures called cristae. The fluid contained in the mitochondria is called the matrix. The folding of the inner membrane increases the surface area inside the organelle. Since many of the chemical reactions happen on the inner membrane, the increased surface area creates more space for reactions to occur.
Hope that helps (:
Answer:
B
Explanation:
Because most animals lives in the same area but we can classify them with the kind of OS cell they're made of because human and dogs can live in the same place but the os cell is what classify them like can you compare a dog with a human know only the human being is behaving senseless so my answer is B
