They pollinate plants, which saves farmers work. Insects such as bees and butterflies help to pollinate plants.
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.
False.
Coal, natural gas, and other fossil fuels are neither sub stainable nor safe. We shouldn’t use them.
Answer:
Explanation:
We are so, so close to commercial orbital tourism. We sit on the cusp of a new space age—an age of convenience rather than exploration, where anybody—really, anybody—can become an astronaut.
To date, only eight non-governmental facilities in the entire country have received FAA licensing approval to operate as spaceports. These spaceports have grown largely from former military and NASA installations—because why build a multi-million dollar launch facility when you can just buy one? But space travel (not unlike pimpin') ain't easy, and it ain't cheap—yet. This handful of pioneering spaceports aim to change that.