Answer:
Positive - give pleasure to the watcher
Negative - uses time the watcher could've spent doing something else, the watcher can never get that time back again.
Explanation:
Positive - give pleasure to the watcher
Negative - uses time the watcher could've spent doing something else, the watcher can never get that time back again.
Physical chemists study matter and energy, and there is chemical reactions in your body, and all living things have elements, like carbon.
I would say D
B. defiantly b. because it can survive in most climates.
Answer:
a.they work together to allow gas exchange
Explanation:
the trachea helps transport air to the lungs, the lungs fill with air, finally the alveoli convert the oxygen to the bloodstream
Answer:
Option). NK cells.
Explanation:
Cluster of differentiation 8 (CD8) can bed defined as a transmembrane glycoprotein that acts a co-receptor for the receptor present on T cells (TCR). The CD8 is marker for 
cells (cytotoxic T cells) as it is predominantly present on cell surface of these cells.
Along with cytotoxic cells, CD8 molecule is also expressed in surface of natural killer cells (NK cells), thymocytes, and myeloid dendritic cells.
Hence, a cell having CD8 on its surface (cytotoxic T cell) would be most similar to NK cells.
