Answer:
1) Metalloids are solids.
2) They have a metallic luster, and generally look like metals.
3) They are brittle, and easily shattered.
4) Metalloids can conduct electricity, but not as well as metals.
It's a pic of 4 ..genetic engineering.. as the selected part of a specific DNA is used for some research !
Answer:
the cup like opening becomes the mouth in placental mammals, including humans.
That would be genetic engineering. This study involves the use of DNA and genes.
It's so broad, it includes physics, chemistry and biology