Answer:
Yes, DNA is a genetic material because it is passed down through the genes of your parents on to you which creates the traits that make you unique.
Explanation:
Answer:
1.
Explanation:
It is a disadvantage because it is harder to find ideal locations.
Answer:
False
Explanation:
The blood brain barrier (BBB) is a selective border that prevents the entry of foreign substances into the brain. It is made up of different components including endothelial cells, astrocytes, and pericytes etc.
Of all these mentioned three, the endothelial cells are directly responsible for the selectivity of the BBB. The endothelial cells are bound together by the tight junctions situated between them, impeding the passage of foreign materials e.g. solutes, pathogens etc.
Astrocytes help to maintain the BBB by surrounding the endothelial cells, providing biochemical strength.
The pericytes are located in the basement membrane, where they communicate with endothelial cells. They help to sustain the BBB by stabilizing and monitoring the maturation of endothelial cells via communicating directly between cell membrane as well as paracrine signalling.
How do rivers become larger as they travel across land?
Tributaries combine, adding water to rivers.
A tributary is a stream that flows into a larger river. Small streams from around an area combine together to form a bigger tributary that eventually falls into rivers. This adds water to the main river, finally leading this river water out into an ocean.
